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openmw-tes3mp/apps/openmw-mp/amx/amx.c

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/* Pawn Abstract Machine (for the Pawn language)
*
* Copyright (c) ITB CompuPhase, 1997-2015
*
* Licensed under the Apache License, Version 2.0 (the "License"); you may not
* use this file except in compliance with the License. You may obtain a copy
* of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS, WITHOUT
* WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied. See the
* License for the specific language governing permissions and limitations
* under the License.
*
* Version: $Id: amx.c 5181 2015-01-21 09:44:28Z thiadmer $
*/
#define WIN32_LEAN_AND_MEAN
#if defined _UNICODE || defined __UNICODE__ || defined UNICODE
# if !defined UNICODE /* for Windows API */
# define UNICODE
# endif
# if !defined _UNICODE /* for C library */
# define _UNICODE
# endif
#endif
#include <assert.h>
#include <stdarg.h>
#include <stddef.h> /* for wchar_t */
#include <stdlib.h> /* for getenv() */
#include <string.h>
#include "osdefs.h"
#if defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
#include <sclinux.h>
#if !defined AMX_NODYNALOAD
#include <dlfcn.h>
#endif
#if defined AMX_JIT
#include <sys/types.h>
#include <sys/mman.h>
#endif
#endif
#if defined __LCC__ || defined __LINUX__
#include <wchar.h> /* for wcslen() */
#endif
#if defined __ECOS__
/* eCos puts include files in cyg/package_name */
#include <cyg/pawn/amx.h>
#else
#include "amx.h"
#endif
#if (defined _Windows && !defined AMX_NODYNALOAD) || (defined AMX_JIT && __WIN32__)
#include <windows.h>
#endif
/* When one or more of the AMX_funcname macros are defined, we want
* to compile only those functions. However, when none of these macros
* is present, we want to compile everything.
*/
#if defined AMX_ALIGN || defined AMX_ALLOT || defined AMX_CLEANUP
#define AMX_EXPLIT_FUNCTIONS
#endif
#if defined AMX_CLONE || defined AMX_DEFCALLBACK || defined AMX_EXEC
#define AMX_EXPLIT_FUNCTIONS
#endif
#if defined AMX_FLAGS || defined AMX_INIT || defined AMX_MEMINFO
#define AMX_EXPLIT_FUNCTIONS
#endif
#if defined AMX_NAMELENGTH || defined AMX_NATIVEINFO || defined AMX_PUSHXXX
#define AMX_EXPLIT_FUNCTIONS
#endif
#if defined AMX_RAISEERROR || defined AMX_REGISTER || defined AMX_SETCALLBACK
#define AMX_EXPLIT_FUNCTIONS
#endif
#if defined AMX_SETDEBUGHOOK || defined AMX_UTF8XXX || defined AMX_XXXNATIVES
#define AMX_EXPLIT_FUNCTIONS
#endif
#if defined AMX_XXXPUBLICS || defined AMX_XXXPUBVARS || defined AMX_XXXSTRING
#define AMX_EXPLIT_FUNCTIONS
#endif
#if defined AMX_XXXTAGS || defined AMX_XXXUSERDATA
#define AMX_EXPLIT_FUNCTIONS
#endif
#if !defined AMX_EXPLIT_FUNCTIONS
/* no constant set, set them all */
#define AMX_ALIGN /* amx_Align16(), amx_Align32() and amx_Align64() */
#define AMX_ALLOT /* amx_Allot() and amx_Release() */
#define AMX_DEFCALLBACK /* amx_Callback() */
#define AMX_CLEANUP /* amx_Cleanup() */
#define AMX_CLONE /* amx_Clone() */
#define AMX_EXEC /* amx_Exec() */
#define AMX_FLAGS /* amx_Flags() */
#define AMX_INIT /* amx_Init() and amx_InitJIT() */
#define AMX_MEMINFO /* amx_MemInfo() */
#define AMX_NAMELENGTH /* amx_NameLength() */
#define AMX_NATIVEINFO /* amx_NativeInfo() */
#define AMX_PUSHXXX /* amx_Push(), amx_PushAddress(), amx_PushArray() and amx_PushString() */
#define AMX_RAISEERROR /* amx_RaiseError() */
#define AMX_REGISTER /* amx_Register() */
#define AMX_SETCALLBACK /* amx_SetCallback() */
#define AMX_SETDEBUGHOOK /* amx_SetDebugHook() */
#define AMX_UTF8XXX /* amx_UTF8Check(), amx_UTF8Get(), amx_UTF8Len() and amx_UTF8Put() */
#define AMX_XXXNATIVES /* amx_NumNatives(), amx_GetNative() and amx_FindNative() */
#define AMX_XXXPUBLICS /* amx_NumPublics(), amx_GetPublic() and amx_FindPublic() */
#define AMX_XXXPUBVARS /* amx_NumPubVars(), amx_GetPubVar() and amx_FindPubVar() */
#define AMX_XXXSTRING /* amx_StrLen(), amx_GetString() and amx_SetString() */
#define AMX_XXXTAGS /* amx_NumTags(), amx_GetTag() and amx_FindTagId() */
#define AMX_XXXUSERDATA /* amx_GetUserData() and amx_SetUserData() */
#endif
#undef AMX_EXPLIT_FUNCTIONS
#if defined AMX_ANSIONLY
#undef AMX_UTF8XXX /* no UTF-8 support in ANSI/ASCII-only version */
#endif
#if defined AMX_NO_NATIVEINFO
#undef AMX_NATIVEINFO
#endif
#if AMX_USERNUM <= 0
#undef AMX_XXXUSERDATA
#endif
#if defined AMX_JIT
/* JIT is incompatible with macro instructions, packed opcodes and overlays */
#if !defined AMX_NO_MACRO_INSTR
#define AMX_NO_MACRO_INSTR
#endif
#if !defined AMX_NO_PACKED_OPC
#define AMX_NO_PACKED_OPC
#endif
#if !defined AMX_NO_OVERLAY
#define AMX_NO_OVERLAY
#endif
#endif
#if (defined AMX_ASM || defined AMX_JIT) && !defined AMX_ALTCORE
/* do not use the standard ANSI-C amx_Exec() function */
#define AMX_ALTCORE
#endif
#if !defined AMX_NO_PACKED_OPC && !defined AMX_TOKENTHREADING
#define AMX_TOKENTHREADING /* packed opcodes require token threading */
#endif
#if defined AMX_ALTCORE
#if defined __WIN32__
/* For Watcom C/C++ use register calling convention (faster); for
* Microsoft C/C++ (and most other C compilers) use "cdecl".
* The important point is that you assemble AMXEXEC.ASM with the matching
* calling convention, or the right JIT, respectively.
* AMXJITR.ASM is for Watcom's register calling convention, AMXJITS.ASM and
* AMXJITSN.ASM are for "cdecl".
*/
#if defined __WATCOMC__ && !defined STACKARGS
/* register calling convention; the #pragma tells the compiler into which
* registers the parameters should go
*/
extern cell amx_exec_run(AMX *amx,cell *retval,unsigned char *data);
#pragma aux amx_exec_run parm [eax] [edx] [ebx];
extern int amx_exec_list(const AMX *amx,const cell **opcodelist,int *numopcodes);
#pragma aux amx_exec_run parm [eax] [edx] [ebx];
extern cell amx_jit_compile(void *pcode, void *jumparray, void *nativecode);
#pragma aux amx_exec_run parm [eax] [edx] [ebx];
extern cell amx_jit_run(AMX *amx,cell *retval,unsigned char *data);
#pragma aux amx_jit_run parm [eax] [edx] [ebx];
extern int amx_jit_list(const AMX *amx,const cell **opcodelist,int *numopcodes);
#pragma aux amx_exec_run parm [eax] [edx] [ebx];
#elif defined __GNUC__
/* force "cdecl" by adding an "attribute" to the declaration */
extern cell amx_exec_run(AMX *amx,cell *retval,unsigned char *data) __attribute__((cdecl));
extern int amx_exec_list(const AMX *amx,const cell **opcodelist,int *numopcodes) __attribute__((cdecl));
extern cell amx_jit_compile(void *pcode, void *jumparray, void *nativecode) __attribute__((cdecl));
extern cell amx_jit_run(AMX *amx,cell *retval,unsigned char *data) __attribute__((cdecl));
extern int amx_jit_list(const AMX *amx,const cell **opcodelist,int *numopcodes) __attribute__((cdecl));
#else
/* force "cdecl" by specifying it as a "function class" with the "__cdecl" keyword */
extern cell __cdecl amx_exec_run(AMX *amx,cell *retval,unsigned char *data);
extern int __cdecl amx_exec_list(const AMX *amx,const cell **opcodelist,int *numopcodes);
extern cell __cdecl amx_jit_compile(void *pcode, void *jumparray, void *nativecode);
extern cell __cdecl amx_jit_run(AMX *amx,cell *retval,unsigned char *data);
extern int __cdecl amx_jit_list(const AMX *amx,const cell **opcodelist,int *numopcodes);
#endif
#else /* __WIN32__ */
/* assume no specific calling conventions for other platforms than Windows */
extern cell amx_exec_run(AMX *amx,cell *retval,unsigned char *data);
extern int amx_exec_list(const AMX *amx,const cell **opcodelist,int *numopcodes);
extern cell amx_jit_compile(void *pcode, void *jumparray, void *nativecode);
extern cell amx_jit_run(AMX *amx,cell *retval,unsigned char *data);
extern int amx_jit_list(const AMX *amx,const cell **opcodelist,int *numopcodes);
#endif /* __WIN32__ */
#else
int amx_exec_list(AMX *amx,const cell **opcodelist,int *numopcodes);
#endif /* AMX_ALTCORE */
typedef enum {
OP_NOP,
OP_LOAD_PRI,
OP_LOAD_ALT,
OP_LOAD_S_PRI,
OP_LOAD_S_ALT,
OP_LREF_S_PRI,
OP_LREF_S_ALT,
OP_LOAD_I,
OP_LODB_I,
OP_CONST_PRI,
OP_CONST_ALT,
OP_ADDR_PRI,
OP_ADDR_ALT,
OP_STOR,
OP_STOR_S,
OP_SREF_S,
OP_STOR_I,
OP_STRB_I,
OP_ALIGN_PRI,
OP_LCTRL,
OP_SCTRL,
OP_XCHG,
OP_PUSH_PRI,
OP_PUSH_ALT,
OP_PUSHR_PRI,
OP_POP_PRI,
OP_POP_ALT,
OP_PICK,
OP_STACK,
OP_HEAP,
OP_PROC,
OP_RET,
OP_RETN,
OP_CALL,
OP_JUMP,
OP_JZER,
OP_JNZ,
OP_SHL,
OP_SHR,
OP_SSHR,
OP_SHL_C_PRI,
OP_SHL_C_ALT,
OP_SMUL,
OP_SDIV,
OP_ADD,
OP_SUB,
OP_AND,
OP_OR,
OP_XOR,
OP_NOT,
OP_NEG,
OP_INVERT,
OP_EQ,
OP_NEQ,
OP_SLESS,
OP_SLEQ,
OP_SGRTR,
OP_SGEQ,
OP_INC_PRI,
OP_INC_ALT,
OP_INC_I,
OP_DEC_PRI,
OP_DEC_ALT,
OP_DEC_I,
OP_MOVS,
OP_CMPS,
OP_FILL,
OP_HALT,
OP_BOUNDS,
OP_SYSREQ,
OP_SWITCH,
OP_SWAP_PRI,
OP_SWAP_ALT,
OP_BREAK,
OP_CASETBL,
/* patched instructions */
OP_SYSREQ_D,
OP_SYSREQ_ND,
/* overlay instructions */
OP_CALL_OVL,
OP_RETN_OVL,
OP_SWITCH_OVL,
OP_CASETBL_OVL,
#if !defined AMX_NO_MACRO_INSTR
/* supplemental & macro instructions */
OP_LIDX,
OP_LIDX_B,
OP_IDXADDR,
OP_IDXADDR_B,
OP_PUSH_C,
OP_PUSH,
OP_PUSH_S,
OP_PUSH_ADR,
OP_PUSHR_C,
OP_PUSHR_S,
OP_PUSHR_ADR,
OP_JEQ,
OP_JNEQ,
OP_JSLESS,
OP_JSLEQ,
OP_JSGRTR,
OP_JSGEQ,
OP_SDIV_INV,
OP_SUB_INV,
OP_ADD_C,
OP_SMUL_C,
OP_ZERO_PRI,
OP_ZERO_ALT,
OP_ZERO,
OP_ZERO_S,
OP_EQ_C_PRI,
OP_EQ_C_ALT,
OP_INC,
OP_INC_S,
OP_DEC,
OP_DEC_S,
/* macro instructions */
OP_SYSREQ_N,
OP_PUSHM_C,
OP_PUSHM,
OP_PUSHM_S,
OP_PUSHM_ADR,
OP_PUSHRM_C,
OP_PUSHRM_S,
OP_PUSHRM_ADR,
OP_LOAD2,
OP_LOAD2_S,
OP_CONST,
OP_CONST_S,
#endif
#if !defined AMX_NO_PACKED_OPC
/* packed instructions */
OP_LOAD_P_PRI,
OP_LOAD_P_ALT,
OP_LOAD_P_S_PRI,
OP_LOAD_P_S_ALT,
OP_LREF_P_S_PRI,
OP_LREF_P_S_ALT,
OP_LODB_P_I,
OP_CONST_P_PRI,
OP_CONST_P_ALT,
OP_ADDR_P_PRI,
OP_ADDR_P_ALT,
OP_STOR_P,
OP_STOR_P_S,
OP_SREF_P_S,
OP_STRB_P_I,
OP_LIDX_P_B,
OP_IDXADDR_P_B,
OP_ALIGN_P_PRI,
OP_PUSH_P_C,
OP_PUSH_P,
OP_PUSH_P_S,
OP_PUSH_P_ADR,
OP_PUSHR_P_C,
OP_PUSHR_P_S,
OP_PUSHR_P_ADR,
OP_PUSHM_P_C,
OP_PUSHM_P,
OP_PUSHM_P_S,
OP_PUSHM_P_ADR,
OP_PUSHRM_P_C,
OP_PUSHRM_P_S,
OP_PUSHRM_P_ADR,
OP_STACK_P,
OP_HEAP_P,
OP_SHL_P_C_PRI,
OP_SHL_P_C_ALT,
OP_ADD_P_C,
OP_SMUL_P_C,
OP_ZERO_P,
OP_ZERO_P_S,
OP_EQ_P_C_PRI,
OP_EQ_P_C_ALT,
OP_INC_P,
OP_INC_P_S,
OP_DEC_P,
OP_DEC_P_S,
OP_MOVS_P,
OP_CMPS_P,
OP_FILL_P,
OP_HALT_P,
OP_BOUNDS_P,
#endif
/* ----- */
OP_NUM_OPCODES
} OPCODE;
#define NUMENTRIES(hdr,field,nextfield) \
(unsigned)(((hdr)->nextfield - (hdr)->field) / (hdr)->defsize)
#define GETENTRY(hdr,table,index) \
(AMX_FUNCSTUB *)((unsigned char*)(hdr) + (unsigned)(hdr)->table + (unsigned)index*(hdr)->defsize)
#define GETENTRYNAME(hdr,entry) \
(char *)((unsigned char*)(hdr) + (unsigned)((AMX_FUNCSTUB*)(entry))->nameofs)
#if !defined NDEBUG
static int check_endian(void)
{
uint16_t val=0x00ff;
unsigned char *ptr=(unsigned char *)&val;
/* "ptr" points to the starting address of "val". If that address
* holds the byte "0xff", the computer stored the low byte of "val"
* at the lower address, and so the memory lay out is Little Endian.
*/
assert(*ptr==0xff || *ptr==0x00);
#if BYTE_ORDER==BIG_ENDIAN
return *ptr==0x00; /* return "true" if big endian */
#else
return *ptr==0xff; /* return "true" if little endian */
#endif
}
#endif
#if BYTE_ORDER==BIG_ENDIAN || PAWN_CELL_SIZE==16
void amx_Swap16(uint16_t *v)
{
unsigned char *s = (unsigned char *)v;
unsigned char t;
assert_static(sizeof(*v)==2);
/* swap two bytes */
t=s[0];
s[0]=s[1];
s[1]=t;
}
#endif
#if BYTE_ORDER==BIG_ENDIAN || PAWN_CELL_SIZE==32
void amx_Swap32(uint32_t *v)
{
unsigned char *s = (unsigned char *)v;
unsigned char t;
assert_static(sizeof(*v)==4);
/* swap outer two bytes */
t=s[0];
s[0]=s[3];
s[3]=t;
/* swap inner two bytes */
t=s[1];
s[1]=s[2];
s[2]=t;
}
#endif
#if (BYTE_ORDER==BIG_ENDIAN || PAWN_CELL_SIZE==64) && (defined _I64_MAX || defined HAVE_I64)
void amx_Swap64(uint64_t *v)
{
unsigned char *s = (unsigned char *)v;
unsigned char t;
assert(sizeof(*v)==8);
t=s[0];
s[0]=s[7];
s[7]=t;
t=s[1];
s[1]=s[6];
s[6]=t;
t=s[2];
s[2]=s[5];
s[5]=t;
t=s[3];
s[3]=s[4];
s[4]=t;
}
#endif
#if defined AMX_ALIGN || defined AMX_INIT
uint16_t * AMXAPI amx_Align16(uint16_t *v)
{
assert_static(sizeof(*v)==2);
assert(check_endian());
#if BYTE_ORDER==BIG_ENDIAN
amx_Swap16(v);
#endif
return v;
}
uint32_t * AMXAPI amx_Align32(uint32_t *v)
{
assert_static(sizeof(*v)==4);
assert(check_endian());
#if BYTE_ORDER==BIG_ENDIAN
amx_Swap32(v);
#endif
return v;
}
#if defined _I64_MAX || defined HAVE_I64
uint64_t * AMXAPI amx_Align64(uint64_t *v)
{
assert(sizeof(*v)==8);
assert(check_endian());
#if BYTE_ORDER==BIG_ENDIAN
amx_Swap64(v);
#endif
return v;
}
#endif /* _I64_MAX || HAVE_I64 */
#endif /* AMX_ALIGN || AMX_INIT */
#if defined AMX_FLAGS
int AMXAPI amx_Flags(AMX *amx,uint16_t *flags)
{
AMX_HEADER *hdr;
*flags=0;
if (amx==NULL)
return AMX_ERR_FORMAT;
hdr=(AMX_HEADER *)amx->base;
if (hdr->magic!=AMX_MAGIC)
return AMX_ERR_FORMAT;
if (hdr->file_version>CUR_FILE_VERSION || hdr->amx_version<MIN_FILE_VERSION)
return AMX_ERR_VERSION;
*flags=hdr->flags;
return AMX_ERR_NONE;
}
#endif /* AMX_FLAGS */
#if defined AMX_DEFCALLBACK
int AMXAPI amx_Callback(AMX *amx, cell index, cell *result, const cell *params)
{
#if defined AMX_NATIVETABLE
extern AMX_NATIVE const AMX_NATIVETABLE[];
#endif
AMX_HEADER *hdr;
AMX_FUNCSTUB *func;
AMX_NATIVE f;
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
assert(hdr->natives<=hdr->libraries);
#if defined AMX_NATIVETABLE
if (index<0) {
/* size of AMX_NATIVETABLE is unknown here, so we cannot verify index */
f=(AMX_NATIVETABLE)[-(index+1)];
} else {
#endif
assert(index>=0 && index<(cell)NUMENTRIES(hdr,natives,libraries));
func=GETENTRY(hdr,natives,index);
f=(AMX_NATIVE)(intptr_t)func->address;
#if defined AMX_NATIVETABLE
} /* if */
#endif
assert(f!=NULL);
/* Now that we have found the function, patch the program so that any
* subsequent call will call the function directly (bypassing this
* callback).
* This trick cannot work in the JIT, because the program would need to
* be re-JIT-compiled after patching a P-code instruction.
*/
assert((amx->flags & AMX_FLAG_JITC)==0 || amx->sysreq_d==0);
if (amx->sysreq_d!=0) {
/* at the point of the call, the CIP pseudo-register points directly
* behind the SYSREQ(.N) instruction and its parameter(s)
*/
unsigned char *code=amx->code+(int)amx->cip-sizeof(cell);
if (amx->flags & AMX_FLAG_SYSREQN) /* SYSREQ.N has 2 parameters */
code-=sizeof(cell);
assert(amx->code!=NULL);
assert(amx->cip>=4 && amx->cip<(hdr->dat - hdr->cod));
assert(sizeof(f)<=sizeof(cell)); /* function pointer must fit in a cell */
assert(*(cell*)code==index);
#if defined AMX_TOKENTHREADING || !(defined __GNUC__ || defined __ICC || defined AMX_ASM || defined AMX_JIT)
assert(!(amx->flags & AMX_FLAG_SYSREQN) && *(cell*)(code-sizeof(cell))==OP_SYSREQ
|| (amx->flags & AMX_FLAG_SYSREQN) && *(cell*)(code-sizeof(cell))==OP_SYSREQ_N);
#endif
*(cell*)(code-sizeof(cell))=amx->sysreq_d;
*(cell*)code=(cell)(intptr_t)f;
} /* if */
/* Note:
* params[0] == number of bytes for the additional parameters passed to the native function
* params[1] == first argument
* etc.
*/
amx->error=AMX_ERR_NONE;
*result = f(amx,params);
return amx->error;
}
#endif /* defined AMX_DEFCALLBACK */
#if defined AMX_JIT
/* convert from relative addresses to absolute physical addresses */
#define RELOC_ABS(base,off) (*(ucell *)((base)+(int)(off)) += (ucell)(base)+(int)(off)-sizeof(cell))
#else
#define JUMPREL(ip) ((cell*)((intptr_t)(ip)+*(cell*)(ip)-sizeof(cell)))
#endif
#if defined AMX_ASM || defined AMX_JIT
#define RELOCATE_ADDR(base,v) ((v)+((ucell)(base)))
#else
#define RELOCATE_ADDR(base,v) (v)
#endif
#define DBGPARAM(v) ( (v)=*(cell *)(amx->code+(int)cip), cip+=sizeof(cell) )
#if !defined GETOPCODE
#if defined AMX_NO_PACKED_OPC
#define GETOPCODE(c) (OPCODE)(c)
#else
#define GETOPCODE(c) (OPCODE)((c) & ((1 << sizeof(cell)*4)-1))
#endif
#endif
#if !defined GETPARAM_P
#define GETPARAM_P(v,o) ( v=((cell)(o) >> (int)(sizeof(cell)*4)) )
#endif
#if defined AMX_INIT
static int VerifyPcode(AMX *amx)
{
AMX_HEADER *hdr;
cell op,cip,tgt,opmask;
int sysreq_flg,max_opcode;
int datasize,stacksize;
const cell *opcode_list;
#if defined AMX_JIT
int opcode_count=0;
int reloc_count=0;
int jit_codesize=0;
#endif
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
amx->flags|=AMX_FLAG_VERIFY;
datasize=hdr->hea-hdr->dat;
stacksize=hdr->stp-hdr->hea;
#if defined AMX_ASM && defined AMX_JIT
if ((amx->flags & AMX_FLAG_JITC)!=0)
jit_codesize=amx_jit_list(amx,&opcode_list,&max_opcode);
else
amx_exec_list(amx,&opcode_list,&max_opcode);
#elif defined AMX_JIT
jit_codesize=amx_jit_list(amx,&opcode_list,&max_opcode);
#else
amx_exec_list(amx,&opcode_list,&max_opcode);
#endif
#if defined AMX_TOKENTHREADING
opcode_list=NULL; /* avoid token translation if token threading is in effect */
#endif
#if defined AMX_NO_PACKED_OPC
opmask= ~0;
#else
opmask=(1 << sizeof(cell)*4)-1;
#endif
/* sanity checks */
assert_static(OP_XCHG==21);
assert_static(OP_SMUL==42);
assert_static(OP_MOVS==64);
#if !defined AMX_NO_MACRO_INSTR
assert_static(OP_LIDX==81);
assert_static(OP_ZERO_PRI==102);
assert_static(OP_LOAD2==120);
#endif
#if !defined AMX_NO_PACKED_OPC
assert_static(OP_LOAD_P_PRI==124);
assert_static(OP_ALIGN_P_PRI==141);
assert_static(OP_BOUNDS_P==174);
#endif
sysreq_flg=0;
if (opcode_list!=NULL) {
if (amx->sysreq_d==opcode_list[OP_SYSREQ_D])
sysreq_flg=0x01;
else if (amx->sysreq_d==opcode_list[OP_SYSREQ_ND])
sysreq_flg=0x02;
} else {
if (amx->sysreq_d==OP_SYSREQ_D)
sysreq_flg=0x01;
else if (amx->sysreq_d==OP_SYSREQ_ND)
sysreq_flg=0x02;
} /* if */
amx->sysreq_d=0; /* preset */
/* start browsing code */
assert(amx->code!=NULL); /* should already have been set in amx_Init() */
for (cip=0; cip<amx->codesize; ) {
op=*(cell *)(amx->code+(int)cip);
if ((op & opmask)>=max_opcode) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_INVINSTR;
} /* if */
/* relocate opcode (only works if the size of an opcode is at least
* as big as the size of a pointer (jump address); so basically we
* rely on the opcode and a pointer being 32-bit
*/
if (opcode_list!=NULL) {
/* verify that opcode_list[op]!=NULL, if it is, this instruction
* is unsupported
*/
if (opcode_list[op & opmask]==0) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_INVINSTR;
} /* if */
*(cell *)(amx->code+(int)cip)=opcode_list[op & opmask];
} /* if */
#if defined AMX_JIT
opcode_count++;
#endif
cip+=sizeof(cell);
switch (op & opmask) {
#if !defined AMX_NO_MACRO_INSTR
case OP_PUSHM_C: /* instructions with variable number of parameters */
case OP_PUSHM:
case OP_PUSHM_S:
case OP_PUSHM_ADR:
case OP_PUSHRM_C:
case OP_PUSHRM_S:
case OP_PUSHRM_ADR:
tgt=*(cell*)(amx->code+(int)cip); /* get count */
cip+=sizeof(cell)*(tgt+1);
break;
case OP_LOAD2:
tgt=*(cell*)(amx->code+(int)cip); /* verify both addresses */
if (tgt<0 || tgt>=datasize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
tgt=*(cell*)(amx->code+(int)cip+(int)sizeof(cell));
if (tgt<0 || tgt>=datasize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
cip+=sizeof(cell)*2;
break;
case OP_LOAD2_S:
tgt=*(cell*)(amx->code+(int)cip); /* verify both addresses */
if (tgt<-stacksize || tgt>stacksize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
tgt=*(cell*)(amx->code+(int)cip+(int)sizeof(cell));
if (tgt<-stacksize || tgt>stacksize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
cip+=sizeof(cell)*2;
break;
case OP_CONST:
tgt=*(cell*)(amx->code+(int)cip); /* verify address */
if (tgt<0 || tgt>=datasize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
cip+=sizeof(cell)*2;
break;
case OP_CONST_S:
tgt=*(cell*)(amx->code+(int)cip); /* verify both addresses */
if (tgt<-stacksize || tgt>stacksize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
cip+=sizeof(cell)*2;
break;
#endif /* !defined AMX_NO_MACRO_INSTR */
#if !defined AMX_NO_PACKED_OPC
case OP_LODB_P_I: /* instructions with 1 parameter packed inside the same cell */
case OP_CONST_P_PRI:
case OP_CONST_P_ALT:
case OP_ADDR_P_PRI:
case OP_ADDR_P_ALT:
case OP_STRB_P_I:
case OP_LIDX_P_B:
case OP_IDXADDR_P_B:
case OP_ALIGN_P_PRI:
case OP_PUSH_P_C:
case OP_PUSH_P:
case OP_PUSH_P_S:
case OP_PUSH_P_ADR:
case OP_PUSHR_P_C:
case OP_PUSHR_P_S:
case OP_PUSHR_P_ADR:
case OP_STACK_P:
case OP_HEAP_P:
case OP_SHL_P_C_PRI:
case OP_SHL_P_C_ALT:
case OP_ADD_P_C:
case OP_SMUL_P_C:
case OP_ZERO_P:
case OP_ZERO_P_S:
case OP_EQ_P_C_PRI:
case OP_EQ_P_C_ALT:
case OP_MOVS_P:
case OP_CMPS_P:
case OP_FILL_P:
case OP_HALT_P:
case OP_BOUNDS_P:
break;
case OP_LOAD_P_PRI: /* data instructions with 1 parameter packed inside the same cell */
case OP_LOAD_P_ALT:
case OP_STOR_P:
case OP_INC_P:
case OP_DEC_P:
GETPARAM_P(tgt,op); /* verify address */
if (tgt<0 || tgt>=datasize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
break;
case OP_LOAD_P_S_PRI: /* stack instructions with 1 parameter packed inside the same cell */
case OP_LOAD_P_S_ALT:
case OP_LREF_P_S_PRI:
case OP_LREF_P_S_ALT:
case OP_STOR_P_S:
case OP_SREF_P_S:
case OP_INC_P_S:
case OP_DEC_P_S:
GETPARAM_P(tgt,op); /* verify address */
if (tgt<-stacksize || tgt>stacksize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
break;
case OP_PUSHM_P_C: /* instructions with variable number of parameters */
case OP_PUSHM_P:
case OP_PUSHM_P_S:
case OP_PUSHM_P_ADR:
case OP_PUSHRM_P_C:
case OP_PUSHRM_P_S:
case OP_PUSHRM_P_ADR:
GETPARAM_P(tgt,op); /* verify address */
cip+=sizeof(cell)*tgt;
break;
#endif /* !defined AMX_NO_PACKED_OPC */
case OP_LODB_I: /* instructions with 1 parameter (not packed) */
case OP_CONST_PRI:
case OP_CONST_ALT:
case OP_ADDR_PRI:
case OP_ADDR_ALT:
case OP_STRB_I:
case OP_ALIGN_PRI:
case OP_LCTRL:
case OP_SCTRL:
case OP_PICK:
case OP_STACK:
case OP_HEAP:
case OP_SHL_C_PRI:
case OP_SHL_C_ALT:
case OP_MOVS:
case OP_CMPS:
case OP_FILL:
case OP_HALT:
case OP_BOUNDS:
#if !defined AMX_NO_MACRO_INSTR
case OP_LIDX_B:
case OP_IDXADDR_B:
case OP_PUSH_C:
case OP_PUSH_ADR:
case OP_PUSHR_C:
case OP_PUSHR_ADR:
case OP_ADD_C:
case OP_SMUL_C:
case OP_ZERO:
case OP_ZERO_S:
case OP_EQ_C_PRI:
case OP_EQ_C_ALT:
#endif
cip+=sizeof(cell);
break;
case OP_LOAD_PRI:
case OP_LOAD_ALT:
case OP_STOR:
#if !defined AMX_NO_MACRO_INSTR
case OP_PUSH:
case OP_INC:
case OP_DEC:
#endif
tgt=*(cell*)(amx->code+(int)cip); /* verify address */
if (tgt<0 || tgt>=datasize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
cip+=sizeof(cell);
break;
case OP_LOAD_S_PRI:
case OP_LOAD_S_ALT:
case OP_LREF_S_PRI:
case OP_LREF_S_ALT:
case OP_STOR_S:
case OP_SREF_S:
#if !defined AMX_NO_MACRO_INSTR
case OP_PUSH_S:
case OP_PUSHR_S:
case OP_INC_S:
case OP_DEC_S:
#endif
tgt=*(cell*)(amx->code+(int)cip); /* verify address */
if (tgt<-stacksize || tgt>stacksize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
cip+=sizeof(cell);
break;
case OP_NOP: /* instructions without parameters */
case OP_LOAD_I:
case OP_STOR_I:
case OP_XCHG:
case OP_PUSH_PRI:
case OP_PUSH_ALT:
case OP_PUSHR_PRI:
case OP_POP_PRI:
case OP_POP_ALT:
case OP_PROC:
case OP_RET:
case OP_RETN:
case OP_SHL:
case OP_SHR:
case OP_SSHR:
case OP_SMUL:
case OP_SDIV:
case OP_ADD:
case OP_SUB:
case OP_AND:
case OP_OR:
case OP_XOR:
case OP_NOT:
case OP_NEG:
case OP_INVERT:
case OP_EQ:
case OP_NEQ:
case OP_SLESS:
case OP_SLEQ:
case OP_SGRTR:
case OP_SGEQ:
case OP_INC_PRI:
case OP_INC_ALT:
case OP_INC_I:
case OP_DEC_PRI:
case OP_DEC_ALT:
case OP_DEC_I:
case OP_SWAP_PRI:
case OP_SWAP_ALT:
case OP_BREAK:
#if !defined AMX_NO_MACRO_INSTR
case OP_LIDX:
case OP_IDXADDR:
case OP_SDIV_INV:
case OP_SUB_INV:
case OP_ZERO_PRI:
case OP_ZERO_ALT:
#endif
break;
case OP_CALL: /* opcodes that need relocation (JIT only), or conversion to position-independent code */
case OP_JUMP:
case OP_JZER:
case OP_JNZ:
case OP_SWITCH:
#if !defined AMX_NO_MACRO_INSTR
case OP_JEQ:
case OP_JNEQ:
case OP_JSLESS:
case OP_JSLEQ:
case OP_JSGRTR:
case OP_JSGEQ:
#endif
tgt=*(cell*)(amx->code+(int)cip)+cip-sizeof(cell);
if (tgt<0 || tgt>amx->codesize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
#if defined AMX_JIT
reloc_count++;
RELOC_ABS(amx->code, cip); /* change to absolute physical address */
#endif
cip+=sizeof(cell);
break;
#if !defined AMX_NO_OVERLAY
/* overlay opcodes (overlays must be enabled) */
case OP_SWITCH_OVL:
assert(hdr->file_version>=10);
tgt=*(cell*)(amx->code+(int)cip)+cip-sizeof(cell);
if (tgt<0 || tgt>amx->codesize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
/* drop through */
case OP_CALL_OVL:
cip+=sizeof(cell);
/* drop through */
case OP_RETN_OVL:
assert(hdr->overlays!=0 && hdr->overlays!=hdr->nametable);
#if defined AMX_JIT
if ((amx->flags & AMX_FLAG_JITC)!=0)
return AMX_ERR_OVERLAY; /* JIT does not support overlays */
#endif
if (amx->overlay==NULL)
return AMX_ERR_OVERLAY; /* no overlay callback */
break;
case OP_CASETBL_OVL: {
cell num;
DBGPARAM(num); /* number of records follows the opcode */
cip+=(2*num + 1)*sizeof(cell);
if (amx->overlay==NULL)
return AMX_ERR_OVERLAY; /* no overlay callback */
break;
} /* case */
#endif
case OP_SYSREQ:
cip+=sizeof(cell);
sysreq_flg|=0x01; /* mark SYSREQ found */
break;
#if !defined AMX_NO_MACRO_INSTR
case OP_SYSREQ_N:
cip+=sizeof(cell)*2;
sysreq_flg|=0x02; /* mark SYSREQ.N found */
break;
#endif
case OP_CASETBL: {
cell num,offs;
int i;
DBGPARAM(num); /* number of records follows the opcode */
for (i=0; i<=num; i++) {
offs=cip+2*i*sizeof(cell);
tgt=*(cell*)(amx->code+(int)offs)+offs-sizeof(cell);
if (tgt<0 || tgt>amx->codesize) {
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_BOUNDS;
} /* if */
#if defined AMX_JIT
RELOC_ABS(amx->code, cip+2*i*sizeof(cell));
reloc_count++;
#endif
} /* for */
cip+=(2*num + 1)*sizeof(cell);
break;
} /* case */
default:
amx->flags &= ~AMX_FLAG_VERIFY;
return AMX_ERR_INVINSTR;
} /* switch */
} /* for */
#if !defined AMX_DONT_RELOCATE
/* only either type of system request opcode should be found (otherwise,
* we probably have a non-conforming compiler
*/
if ((sysreq_flg==0x01 || sysreq_flg==0x02) && (amx->flags & AMX_FLAG_JITC)==0) {
/* to use direct system requests, a function pointer must fit in a cell;
* because the native function's address will be stored as the parameter
* of SYSREQ.(N)D
*/
if (sizeof(AMX_NATIVE)<=sizeof(cell)) {
if (opcode_list!=NULL)
amx->sysreq_d=(sysreq_flg==0x01) ? opcode_list[OP_SYSREQ_D] : opcode_list[OP_SYSREQ_ND];
else
amx->sysreq_d=(sysreq_flg==0x01) ? OP_SYSREQ_D : OP_SYSREQ_ND;
} /* if */
} /* if */
#endif
#if defined AMX_JIT
/* adjust the code size to mean: estimated code size of the native code
* (instead of the size of the P-code)
*/
amx->codesize=jit_codesize*opcode_count + hdr->cod + (hdr->stp - hdr->dat);
amx->reloc_size=2*sizeof(cell)*reloc_count;
#endif
amx->flags &= ~AMX_FLAG_VERIFY;
amx->flags |= AMX_FLAG_INIT;
if (sysreq_flg & 0x02)
amx->flags |= AMX_FLAG_SYSREQN;
return AMX_ERR_NONE;
}
/* definitions used for amx_Init() and amx_Cleanup() */
#if (defined _Windows || defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__) && !defined AMX_NODYNALOAD
typedef int AMXEXPORT (AMXAPI _FAR *AMX_ENTRY)(AMX _FAR *amx);
#endif
int AMXAPI amx_Init(AMX *amx,void *program)
{
AMX_HEADER *hdr;
int err;
uint16_t *namelength;
unsigned char *data;
#if (defined _Windows || defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__) && !defined AMX_NODYNALOAD
#if defined _Windows
char libname[sNAMEMAX+8]; /* +1 for '\0', +3 for 'amx' prefix, +4 for extension */
HINSTANCE hlib;
#elif defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
char libname[_MAX_PATH];
char *root;
void *hlib;
#if !defined AMX_LIBPATH
#define AMX_LIBPATH "AMXLIB"
#endif
#endif
int numlibraries;
AMX_FUNCSTUB *lib;
AMX_ENTRY libinit;
#endif
if ((amx->flags & AMX_FLAG_INIT)!=0)
return AMX_ERR_INIT; /* already initialized (may not do so twice) */
hdr=(AMX_HEADER *)program;
/* the header is in Little Endian, on a Big Endian machine, swap all
* multi-byte words
*/
assert(check_endian());
#if BYTE_ORDER==BIG_ENDIAN
amx_Align32((uint32_t*)&hdr->size);
amx_Align16(&hdr->magic);
amx_Align16((uint16_t*)&hdr->flags);
amx_Align16((uint16_t*)&hdr->defsize);
amx_Align32((uint32_t*)&hdr->cod);
amx_Align32((uint32_t*)&hdr->dat);
amx_Align32((uint32_t*)&hdr->hea);
amx_Align32((uint32_t*)&hdr->stp);
amx_Align32((uint32_t*)&hdr->cip);
amx_Align32((uint32_t*)&hdr->publics);
amx_Align32((uint32_t*)&hdr->natives);
amx_Align32((uint32_t*)&hdr->libraries);
amx_Align32((uint32_t*)&hdr->pubvars);
amx_Align32((uint32_t*)&hdr->tags);
if (hdr->file_version>=10)
amx_Align32((uint32_t*)&hdr->overlays);
#endif
if (hdr->magic!=AMX_MAGIC)
return AMX_ERR_FORMAT;
if (hdr->file_version>CUR_FILE_VERSION || hdr->amx_version<MIN_FILE_VERSION)
return AMX_ERR_VERSION;
if (hdr->defsize!=sizeof(AMX_FUNCSTUB))
return AMX_ERR_FORMAT;
/* check the maximum name length in the separate name table */
amx_Align32((uint32_t*)&hdr->nametable);
namelength=(uint16_t*)((unsigned char*)program + (unsigned)hdr->nametable);
amx_Align16(namelength);
if (*namelength>sNAMEMAX)
return AMX_ERR_FORMAT;
if (hdr->stp<=0)
return AMX_ERR_FORMAT;
assert(hdr->hea == hdr->size);
#if BYTE_ORDER==BIG_ENDIAN
if ((hdr->flags & AMX_FLAG_COMPACT)==0) {
ucell *code=(ucell *)((unsigned char *)program+(int)hdr->cod);
while (code<(ucell *)((unsigned char *)program+(int)hdr->hea))
amx_SwapCell(code++);
} /* if */
#endif
amx->base=(unsigned char *)program;
/* set initial values */
amx->hlw=hdr->hea - hdr->dat; /* stack and heap relative to data segment */
amx->stp=hdr->stp - hdr->dat - sizeof(cell);
amx->hea=amx->hlw;
amx->stk=amx->stp;
#if defined AMX_DEFCALLBACK
if (amx->callback==NULL)
amx->callback=amx_Callback;
#endif
/* when running P-code from ROM (with the header with the native function
* table in RAM), the "code" field must be set to a non-NULL value on
* initialization, before calling amx_Init(); in an overlay scheme, the
* code field is modified dynamically by the overlay callback
*/
if (amx->code==NULL)
amx->code=amx->base+(int)hdr->cod;
if (amx->codesize==0)
amx->codesize=hdr->dat-hdr->cod;
/* to split the data segment off the code segment, the "data" field must
* be set to a non-NULL value on initialization, before calling amx_Init();
* you may also need to explicitly initialize the data section with the
* contents read from the AMX file
*/
if (amx->data!=NULL) {
data=amx->data;
if ((amx->flags & AMX_FLAG_DSEG_INIT)==0 && amx->overlay==NULL)
memcpy(data,amx->base+(int)hdr->dat,(size_t)(hdr->hea-hdr->dat));
} else {
data=amx->base+(int)hdr->dat;
} /* if */
/* Set a zero cell at the top of the stack, which functions
* as a sentinel for strings.
*/
* (cell *)(data+(int)(hdr->stp-hdr->dat-sizeof(cell)))=0;
/* also align all addresses in the public function, public variable,
* public tag and native function tables --offsets into the name table
* (if present) must also be swapped.
*/
#if BYTE_ORDER==BIG_ENDIAN
{ /* local */
AMX_FUNCSTUB *fs;
int i,num;
fs=GETENTRY(hdr,natives,0);
num=NUMENTRIES(hdr,natives,libraries);
for (i=0; i<num; i++) {
amx_Align32(&fs->address); /* redundant, because it should be zero */
amx_Align32(&fs->nameofs);
fs=(AMX_FUNCSTUB*)((unsigned char *)fs+hdr->defsize);
} /* for */
fs=GETENTRY(hdr,publics,0);
assert(hdr->publics<=hdr->natives);
num=NUMENTRIES(hdr,publics,natives);
for (i=0; i<num; i++) {
amx_Align32(&fs->address);
amx_Align32(&fs->nameofs);
fs=(AMX_FUNCSTUB*)((unsigned char *)fs+hdr->defsize);
} /* for */
fs=GETENTRY(hdr,pubvars,0);
assert(hdr->pubvars<=hdr->tags);
num=NUMENTRIES(hdr,pubvars,tags);
for (i=0; i<num; i++) {
amx_Align32(&fs->address);
amx_Align32(&fs->nameofs);
fs=(AMX_FUNCSTUB*)((unsigned char *)fs+hdr->defsize);
} /* for */
fs=GETENTRY(hdr,tags,0);
if (hdr->file_version<7) { /* file version 7 introduced the name table */
assert(hdr->tags<=hdr->cod);
num=NUMENTRIES(hdr,tags,cod);
} else {
assert(hdr->tags<=hdr->nametable);
num=NUMENTRIES(hdr,tags,nametable);
} /* if */
for (i=0; i<num; i++) {
amx_Align32(&fs->address);
amx_Align32(&fs->nameofs);
fs=(AMX_FUNCSTUB*)((unsigned char *)fs+hdr->defsize);
} /* for */
} /* local */
#endif
/* verify P-code and relocate address in the case of the JIT */
if ((hdr->flags & AMX_FLAG_OVERLAY)==0) {
err=VerifyPcode(amx);
} else {
int i;
err=(amx->overlay==NULL) ? AMX_ERR_OVERLAY : AMX_ERR_NONE;
/* load every overlay on initialization and verify explicitly; we must
* do this to know whether to use new or old system requests
*/
for (i=0; err==AMX_ERR_NONE && i<(int)((hdr->nametable - hdr->overlays)/sizeof(AMX_OVERLAYINFO)); i++) {
err=amx->overlay(amx, i);
if (err==AMX_ERR_NONE)
err=VerifyPcode(amx);
} /* for */
} /* if */
if (err!=AMX_ERR_NONE)
return err;
/* load any extension modules that the AMX refers to */
#if (defined _Windows || defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__) && !defined AMX_NODYNALOAD
{ /* local */
int i;
#if defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
root=getenv("AMXLIB");
#endif
hdr=(AMX_HEADER *)amx->base;
numlibraries=NUMENTRIES(hdr,libraries,pubvars);
for (i=0; i<numlibraries; i++) {
lib=GETENTRY(hdr,libraries,i);
libname[0]='\0';
#if defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
if (root!=NULL && *root!='\0') {
strcpy(libname,root);
if (libname[strlen(libname)-1]!='/')
strcat(libname,"/");
} /* if */
#endif
strcat(libname,"amx");
strcat(libname,GETENTRYNAME(hdr,lib));
#if defined _Windows
strcat(libname,".dll");
#if defined __WIN32__
hlib=LoadLibraryA(libname);
#else
hlib=LoadLibrary(libname);
if (hlib<=HINSTANCE_ERROR)
hlib=NULL;
#endif
#elif defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
strcat(libname,".so");
hlib=dlopen(libname,RTLD_NOW);
#endif
if (hlib!=NULL) {
/* a library that cannot be loaded or that does not have the required
* initialization function is simply ignored
*/
char funcname[sNAMEMAX+9]; /* +1 for '\0', +4 for 'amx_', +4 for 'Init' */
strcpy(funcname,"amx_");
strcat(funcname,GETENTRYNAME(hdr,lib));
strcat(funcname,"Init");
#if defined _Windows
libinit=(AMX_ENTRY)GetProcAddress(hlib,funcname);
#elif defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
libinit=(AMX_ENTRY)dlsym(hlib,funcname);
#endif
if (libinit!=NULL)
libinit(amx);
} /* if */
lib->address=(ucell)(intptr_t)hlib;
} /* for */
} /* local */
#endif
return AMX_ERR_NONE;
}
#if defined AMX_JIT
#define CODESIZE_JIT 8192 /* approximate size of the code for the JIT */
#if defined __WIN32__ /* this also applies to Win32 "console" applications */
#define ALIGN(addr) (addr)
#define PROT_READ 0x1 /* page can be read */
#define PROT_WRITE 0x2 /* page can be written */
#define PROT_EXEC 0x4 /* page can be executed */
#define PROT_NONE 0x0 /* page can not be accessed */
static int mprotect(void *addr, size_t len, int prot)
{
DWORD prev, p = 0;
if ((prot & PROT_WRITE)!=0)
p = PAGE_EXECUTE_READWRITE;
else
p |= PAGE_EXECUTE_READ;
return !VirtualProtect(addr, len, p, &prev);
}
#elif defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
/* Linux, BSD and OSX already have mprotect() */
#define ALIGN(addr) (char *)(((long)addr + sysconf(_SC_PAGESIZE)-1) & ~(sysconf(_SC_PAGESIZE)-1))
#else
// TODO: Add cases for Mac OS/X and other operating systems
/* DOS32 has no imposed limits on its segments */
#define ALIGN(addr) (addr)
#define mprotect(addr, len, prot) (0)
#endif /* #if defined __WIN32 __ */
int AMXAPI amx_InitJIT(AMX *amx, void *reloc_table, void *native_code)
{
int res;
AMX_HEADER *hdr;
if ((amx->flags & AMX_FLAG_JITC)==0)
return AMX_ERR_INIT_JIT; /* flag not set, this AMX is not prepared for JIT */
if (hdr->file_version>MAX_FILE_VER_JIT)
return AMX_ERR_VERSION; /* JIT may not support the newest file version(s) */
/* the JIT does not support overlays, but this is already checked in VerifyPcode()
* the same goes for macro instructions: not supported in the JIT, but already
* checked in VerifyPcode()
*/
/* Patching SYSREQ(.N) opcodes to SYSREQ.(N)D cannot work in the JIT, because
* the program would need to be re-JIT-compiled after patching a P-code
* instruction. If this field is not zero, something went wrong in
* VerifyPcode().
*/
assert(amx->sysreq_d==0);
if (mprotect(ALIGN(amx_jit_compile), CODESIZE_JIT, PROT_READ | PROT_WRITE | PROT_EXEC) != 0)
return AMX_ERR_INIT_JIT;
/* copy the prefix */
memcpy(native_code, amx->base, ((AMX_HEADER *)(amx->base))->cod);
hdr = native_code;
/* MP: added check for correct compilation */
if ((res = amx_jit_compile(amx->base, reloc_table, native_code)) == 0) {
/* update the required memory size (the previous value was a
* conservative estimate, now we know the exact size)
*/
amx->codesize = (hdr->dat + hdr->stp + sizeof(cell)) & ~(sizeof(cell)-1);
/* The compiled code is relocatable, since only relative jumps are
* used for destinations within the generated code, and absolute
* addresses are only for jumps into the runtime, which is fixed
* in memory.
*/
/* set the new pointers */
amx->base = (unsigned char*)native_code;
amx->code = amx->base + (int)hdr->cod;
amx->cip = hdr->cip;
} /* if */
return (res == 0) ? AMX_ERR_NONE : AMX_ERR_INIT_JIT;
}
#else /* #if defined AMX_JIT */
int AMXAPI amx_InitJIT(AMX *amx,void *compiled_program,void *reloc_table)
{
(void)amx;
(void)compiled_program;
(void)reloc_table;
return AMX_ERR_INIT_JIT;
}
#endif /* #if defined AMX_JIT */
#endif /* AMX_INIT */
#if defined AMX_CLEANUP
int AMXAPI amx_Cleanup(AMX *amx)
{
#if (defined _Windows || defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__) && !defined AMX_NODYNALOAD
AMX_HEADER *hdr;
int numlibraries,i;
AMX_FUNCSTUB *lib;
AMX_ENTRY libcleanup;
#endif
/* unload all extension modules */
#if (defined _Windows || defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__) && !defined AMX_NODYNALOAD
hdr=(AMX_HEADER *)amx->base;
assert(hdr->magic==AMX_MAGIC);
numlibraries=NUMENTRIES(hdr,libraries,pubvars);
for (i=0; i<numlibraries; i++) {
lib=GETENTRY(hdr,libraries,i);
if (lib->address!=0) {
char funcname[sNAMEMAX+12]; /* +1 for '\0', +4 for 'amx_', +7 for 'Cleanup' */
strcpy(funcname,"amx_");
strcat(funcname,GETENTRYNAME(hdr,lib));
strcat(funcname,"Cleanup");
#if defined _Windows
libcleanup=(AMX_ENTRY)GetProcAddress((HINSTANCE)lib->address,funcname);
#elif defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
libcleanup=(AMX_ENTRY)dlsym((void*)(intptr_t)lib->address,funcname);
#endif
if (libcleanup!=NULL)
libcleanup(amx);
#if defined _Windows
FreeLibrary((HINSTANCE)lib->address);
#elif defined __LINUX__ || defined __FreeBSD__ || defined __OpenBSD__ || defined __APPLE__
dlclose((void*)(intptr_t)lib->address);
#endif
} /* if */
} /* for */
#else
(void)amx;
#endif
return AMX_ERR_NONE;
}
#endif /* AMX_CLEANUP */
#if defined AMX_CLONE
int AMXAPI amx_Clone(AMX *amxClone, AMX *amxSource, void *data)
{
AMX_HEADER *hdr;
unsigned char _FAR *dataSource;
if (amxSource==NULL)
return AMX_ERR_FORMAT;
if (amxClone==NULL)
return AMX_ERR_PARAMS;
if ((amxSource->flags & AMX_FLAG_INIT)==0)
return AMX_ERR_INIT;
hdr=(AMX_HEADER *)amxSource->base;
if (hdr->magic!=AMX_MAGIC)
return AMX_ERR_FORMAT;
if (hdr->file_version>CUR_FILE_VERSION || hdr->amx_version<MIN_FILE_VERSION)
return AMX_ERR_VERSION;
/* set initial values */
amxClone->base=amxSource->base;
amxClone->code=amxSource->code;
amxClone->codesize=amxSource->codesize;
amxClone->hlw=hdr->hea - hdr->dat; /* stack and heap relative to data segment */
amxClone->stp=hdr->stp - hdr->dat - sizeof(cell);
amxClone->hea=amxClone->hlw;
amxClone->stk=amxClone->stp;
if (amxClone->callback==NULL)
amxClone->callback=amxSource->callback;
if (amxClone->debug==NULL)
amxClone->debug=amxSource->debug;
amxClone->flags=amxSource->flags;
/* copy the data segment; the stack and the heap can be left uninitialized */
assert(data!=NULL);
amxClone->data=(unsigned char _FAR *)data;
dataSource=(amxSource->data!=NULL) ? amxSource->data : amxSource->base+(int)hdr->dat;
memcpy(amxClone->data,dataSource,(size_t)(hdr->hea-hdr->dat));
/* Set a zero cell at the top of the stack, which functions
* as a sentinel for strings.
*/
* (cell *)(amxClone->data+(int)amxClone->stp) = 0;
return AMX_ERR_NONE;
}
#endif /* AMX_CLONE */
#if defined AMX_MEMINFO
int AMXAPI amx_MemInfo(AMX *amx, long *codesize, long *datasize, long *stackheap)
{
AMX_HEADER *hdr;
if (amx==NULL)
return AMX_ERR_FORMAT;
hdr=(AMX_HEADER *)amx->base;
if (hdr->magic!=AMX_MAGIC)
return AMX_ERR_FORMAT;
if (hdr->file_version>CUR_FILE_VERSION || hdr->amx_version<MIN_FILE_VERSION)
return AMX_ERR_VERSION;
if (codesize!=NULL)
*codesize=amx->codesize;
if (datasize!=NULL)
*datasize=hdr->hea - hdr->dat;
if (stackheap!=NULL)
*stackheap=hdr->stp - hdr->hea;
return AMX_ERR_NONE;
}
#endif /* AMX_MEMINFO */
#if defined AMX_NAMELENGTH
int AMXAPI amx_NameLength(AMX *amx, int *length)
{
AMX_HEADER *hdr;
uint16_t *namelength;
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
namelength=(uint16_t*)(amx->base + (unsigned)hdr->nametable);
*length=*namelength;
return AMX_ERR_NONE;
}
#endif /* AMX_NAMELENGTH */
#if defined AMX_XXXNATIVES
int AMXAPI amx_NumNatives(AMX *amx, int *number)
{
AMX_HEADER *hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
assert(hdr->natives<=hdr->libraries);
*number=NUMENTRIES(hdr,natives,libraries);
return AMX_ERR_NONE;
}
int AMXAPI amx_GetNative(AMX *amx, int index, char *name)
{
AMX_HEADER *hdr;
AMX_FUNCSTUB *func;
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
assert(hdr->natives<=hdr->libraries);
if (index>=(cell)NUMENTRIES(hdr,natives,libraries))
return AMX_ERR_INDEX;
func=GETENTRY(hdr,natives,index);
strcpy(name,GETENTRYNAME(hdr,func));
return AMX_ERR_NONE;
}
int AMXAPI amx_FindNative(AMX *amx, const char *name, int *index)
{
int idx,last;
char pname[sNAMEMAX+1];
amx_NumNatives(amx, &last);
/* linear search, the natives table is not sorted alphabetically */
for (idx=0; idx<last; idx++) {
amx_GetNative(amx,idx,pname);
if (strcmp(pname,name)==0) {
*index=idx;
return AMX_ERR_NONE;
} /* if */
} /* for */
*index=INT_MAX;
return AMX_ERR_NOTFOUND;
}
#endif /* AMX_XXXNATIVES */
#if defined AMX_XXXPUBLICS
int AMXAPI amx_NumPublics(AMX *amx, int *number)
{
AMX_HEADER *hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
assert(hdr->publics<=hdr->natives);
*number=NUMENTRIES(hdr,publics,natives);
return AMX_ERR_NONE;
}
int AMXAPI amx_GetPublic(AMX *amx, int index, char *name, ucell *address)
{
AMX_HEADER *hdr;
AMX_FUNCSTUB *func;
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
assert(hdr->publics<=hdr->natives);
if (index>=(cell)NUMENTRIES(hdr,publics,natives))
return AMX_ERR_INDEX;
func=GETENTRY(hdr,publics,index);
if (name!=NULL)
strcpy(name,GETENTRYNAME(hdr,func));
if (address!=NULL)
*address=func->address;
return AMX_ERR_NONE;
}
int AMXAPI amx_FindPublic(AMX *amx, const char *name, int *index)
{
int first,last,mid,result;
char pname[sNAMEMAX+1];
amx_NumPublics(amx, &last);
last--; /* last valid index is 1 less than the number of functions */
first=0;
/* binary search */
while (first<=last) {
mid=(first+last)/2;
amx_GetPublic(amx,mid,pname,NULL);
result=strcmp(pname,name);
if (result>0) {
last=mid-1;
} else if (result<0) {
first=mid+1;
} else {
*index=mid;
return AMX_ERR_NONE;
} /* if */
} /* while */
/* not found, set to an invalid index, so amx_Exec() on this index will fail
* with an error
*/
*index=INT_MAX;
return AMX_ERR_NOTFOUND;
}
#endif /* AMX_XXXPUBLICS */
#if defined AMX_XXXPUBVARS
int AMXAPI amx_NumPubVars(AMX *amx, int *number)
{
AMX_HEADER *hdr;
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
assert(hdr->pubvars<=hdr->tags);
*number=NUMENTRIES(hdr,pubvars,tags);
return AMX_ERR_NONE;
}
int AMXAPI amx_GetPubVar(AMX *amx, int index, char *name, cell **address)
{
AMX_HEADER *hdr;
AMX_FUNCSTUB *var;
unsigned char *data;
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
assert(hdr->pubvars<=hdr->tags);
if (index>=(cell)NUMENTRIES(hdr,pubvars,tags))
return AMX_ERR_INDEX;
var=GETENTRY(hdr,pubvars,index);
strcpy(name,GETENTRYNAME(hdr,var));
data=(amx->data!=NULL) ? amx->data : amx->base+(int)hdr->dat;
assert(address!=NULL);
*address=(cell *)(data+(int)var->address);
return AMX_ERR_NONE;
}
int AMXAPI amx_FindPubVar(AMX *amx, const char *name, cell **address)
{
int first,last,mid,result;
char pname[sNAMEMAX+1];
amx_NumPubVars(amx,&last);
last--; /* last valid index is 1 less than the number of functions */
first=0;
/* binary search */
while (first<=last) {
mid=(first+last)/2;
amx_GetPubVar(amx,mid,pname,address);
result=strcmp(pname,name);
if (result>0)
last=mid-1;
else if (result<0)
first=mid+1;
else
return AMX_ERR_NONE;
} /* while */
/* not found */
assert(address!=NULL);
*address=NULL;
return AMX_ERR_NOTFOUND;
}
#endif /* AMX_XXXPUBVARS */
#if defined AMX_XXXTAGS
int AMXAPI amx_NumTags(AMX *amx, int *number)
{
AMX_HEADER *hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
if (hdr->file_version<5) { /* the tagname table appeared in file format 5 */
*number=0;
return AMX_ERR_VERSION;
} /* if */
if (hdr->file_version<7) { /* file version 7 introduced the name table */
assert(hdr->tags<=hdr->cod);
*number=NUMENTRIES(hdr,tags,cod);
} else {
assert(hdr->tags<=hdr->nametable);
*number=NUMENTRIES(hdr,tags,nametable);
} /* if */
return AMX_ERR_NONE;
}
int AMXAPI amx_GetTag(AMX *amx, int index, char *tagname, cell *tag_id)
{
AMX_HEADER *hdr;
AMX_FUNCSTUB *tag;
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
if (hdr->file_version<5) { /* the tagname table appeared in file format 5 */
*tagname='\0';
*tag_id=0;
return AMX_ERR_VERSION;
} /* if */
if (hdr->file_version<7) { /* file version 7 introduced the name table */
assert(hdr->tags<=hdr->cod);
if (index>=(cell)NUMENTRIES(hdr,tags,cod))
return AMX_ERR_INDEX;
} else {
assert(hdr->tags<=hdr->nametable);
if (index>=(cell)NUMENTRIES(hdr,tags,nametable))
return AMX_ERR_INDEX;
} /* if */
tag=GETENTRY(hdr,tags,index);
strcpy(tagname,GETENTRYNAME(hdr,tag));
*tag_id=tag->address;
return AMX_ERR_NONE;
}
int AMXAPI amx_FindTagId(AMX *amx, cell tag_id, char *tagname)
{
int first,last,mid;
cell mid_id;
#if !defined NDEBUG
/* verify that the tagname table is sorted on the tag_id */
amx_NumTags(amx, &last);
if (last>0) {
cell cur_id;
amx_GetTag(amx,0,tagname,&cur_id);
for (first=1; first<last; first++) {
amx_GetTag(amx,first,tagname,&mid_id);
assert(cur_id<mid_id);
cur_id=mid_id;
} /* for */
} /* if */
#endif
amx_NumTags(amx, &last);
last--; /* last valid index is 1 less than the number of functions */
first=0;
/* binary search */
while (first<=last) {
mid=(first+last)/2;
amx_GetTag(amx,mid,tagname,&mid_id);
if (mid_id>tag_id)
last=mid-1;
else if (mid_id<tag_id)
first=mid+1;
else
return AMX_ERR_NONE;
} /* while */
/* not found */
*tagname='\0';
return AMX_ERR_NOTFOUND;
}
#endif /* AMX_XXXTAGS */
#if defined AMX_XXXUSERDATA
int AMXAPI amx_GetUserData(AMX *amx, long tag, void **ptr)
{
int index;
assert(amx!=NULL);
assert(tag!=0);
for (index=0; index<AMX_USERNUM && amx->usertags[index]!=tag; index++)
/* nothing */;
if (index>=AMX_USERNUM)
return AMX_ERR_USERDATA;
*ptr=amx->userdata[index];
return AMX_ERR_NONE;
}
int AMXAPI amx_SetUserData(AMX *amx, long tag, void *ptr)
{
int index;
assert(amx!=NULL);
assert(tag!=0);
/* try to find existing tag */
for (index=0; index<AMX_USERNUM && amx->usertags[index]!=tag; index++)
/* nothing */;
/* if not found, try to find empty tag */
if (index>=AMX_USERNUM)
for (index=0; index<AMX_USERNUM && amx->usertags[index]!=0; index++)
/* nothing */;
/* if still not found, quit with error */
if (index>=AMX_USERNUM)
return AMX_ERR_INDEX;
/* set the tag and the value */
amx->usertags[index]=tag;
amx->userdata[index]=ptr;
return AMX_ERR_NONE;
}
#endif /* AMX_XXXUSERDATA */
#if defined AMX_REGISTER
static AMX_NATIVE findfunction(char *name, const AMX_NATIVE_INFO *list, int number)
{
int i;
assert(list!=NULL);
for (i=0; list[i].name!=NULL && (i<number || number==-1); i++)
if (strcmp(name,list[i].name)==0)
return list[i].func;
return NULL;
}
int AMXAPI amx_Register(AMX *amx, const AMX_NATIVE_INFO *list, int number)
{
AMX_FUNCSTUB *func;
AMX_HEADER *hdr;
int i,numnatives,err;
AMX_NATIVE funcptr;
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
assert(hdr->natives<=hdr->libraries);
numnatives=NUMENTRIES(hdr,natives,libraries);
err=AMX_ERR_NONE;
func=GETENTRY(hdr,natives,0);
for (i=0; i<numnatives; i++) {
if (func->address==0) {
/* this function is not yet located */
funcptr=(list!=NULL) ? findfunction(GETENTRYNAME(hdr,func),list,number) : NULL;
if (funcptr!=NULL)
func->address=(ucell)(intptr_t)funcptr;
else
err=AMX_ERR_NOTFOUND;
} /* if */
func=(AMX_FUNCSTUB*)((unsigned char*)func+hdr->defsize);
} /* for */
if (err==AMX_ERR_NONE)
amx->flags|=AMX_FLAG_NTVREG;
return err;
}
#endif /* AMX_REGISTER */
#if defined AMX_NATIVEINFO
AMX_NATIVE_INFO * AMXAPI amx_NativeInfo(const char *name, AMX_NATIVE func)
{
static AMX_NATIVE_INFO n;
n.name=name;
n.func=func;
return &n;
}
#endif /* AMX_NATIVEINFO */
#define STKMARGIN ((cell)(16*sizeof(cell)))
#if defined AMX_PUSHXXX
int AMXAPI amx_Push(AMX *amx, cell value)
{
AMX_HEADER *hdr;
unsigned char *data;
if (amx->hea+STKMARGIN>amx->stk)
return AMX_ERR_STACKERR;
hdr=(AMX_HEADER *)amx->base;
data=(amx->data!=NULL) ? amx->data : amx->base+(int)hdr->dat;
amx->stk-=sizeof(cell);
amx->paramcount+=1;
*(cell *)(data+(int)amx->stk)=value;
return AMX_ERR_NONE;
}
int AMXAPI amx_PushAddress(AMX *amx, cell *address)
{
AMX_HEADER *hdr;
unsigned char *data;
cell xaddr;
/* reverse relocate the address */
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
data=(amx->data!=NULL) ? amx->data : amx->base+(int)hdr->dat;
xaddr=(cell)((unsigned char*)address-data);
if ((ucell)xaddr>=(ucell)amx->stp)
return AMX_ERR_MEMACCESS;
return amx_Push(amx,xaddr);
}
int AMXAPI amx_PushArray(AMX *amx, cell **address, const cell array[], int numcells)
{
cell xaddr,*paddr;
int err;
assert(amx!=NULL);
assert(array!=NULL);
xaddr=amx->hea; /* save, before it is modified by amx_Allot() */
err=amx_Allot(amx,numcells,&paddr);
if (err==AMX_ERR_NONE) {
memcpy(paddr,array,numcells*sizeof(cell));
err=amx_Push(amx,xaddr);
} /* if */
if (address!=NULL)
*address=paddr;
return err;
}
int AMXAPI amx_PushString(AMX *amx, cell **address, const char *string, int pack, int use_wchar)
{
cell xaddr,*paddr;
int numcells,err;
assert(amx!=NULL);
assert(string!=NULL);
#if defined AMX_ANSIONLY
numcells=strlen(string) + 1;
#else
numcells= (int)(use_wchar ? wcslen((const wchar_t*)string) : strlen(string)) + 1;
#endif
if (pack)
numcells=(numcells+sizeof(cell)-1)/sizeof(cell);
xaddr=amx->hea; /* save, before it is modified by amx_Allot() */
err=amx_Allot(amx,numcells,&paddr);
if (err==AMX_ERR_NONE) {
amx_SetString(paddr,string,pack,use_wchar,numcells);
err=amx_Push(amx,xaddr);
} /* if */
if (address!=NULL)
*address=paddr;
return err;
}
#endif /* AMX_PUSHXXX */
#if defined AMX_EXEC
/* It is assumed that the abstract machine can simply access the memory area
* for the global data and the stack. If this is not the case, you need to
* define the macro sets _R() and _W(), for reading and writing to memory.
*/
#if !defined _R
#define _R_DEFAULT /* mark default memory access */
#define _R(base,addr) (* (cell *)((unsigned char*)(base)+(int)(addr)))
#define _R8(base,addr) (* (unsigned char *)((unsigned char*)(base)+(int)(addr)))
#define _R16(base,addr) (* (uint16_t *)((unsigned char*)(base)+(int)(addr)))
#define _R32(base,addr) (* (uint32_t *)((unsigned char*)(base)+(int)(addr)))
#endif
#if !defined _W
#define _W_DEFAULT /* mark default memory access */
#define _W(base,addr,value) ((*(cell *)((unsigned char*)(base)+(int)(addr)))=(cell)(value))
#define _W8(base,addr,value) ((*(unsigned char *)((unsigned char*)(base)+(int)(addr)))=(unsigned char)(value))
#define _W16(base,addr,value) ((*(uint16_t *)((unsigned char*)(base)+(int)(addr)))=(uint16_t)(value))
#define _W32(base,addr,value) ((*(uint32_t *)((unsigned char*)(base)+(int)(addr)))=(uint32_t)(value))
#endif
#if -8/3==-2 && 8/-3==-2
#define TRUNC_SDIV /* signed divisions are truncated on this platform */
#else
#define IABS(a) ((a)>=0 ? (a) : (-a))
#endif
/* The pseudo-instructions come from the code stream. Normally, these are just
* accessed from memory. When the instructions must be fetched in some other
* way, the definition below must be pre-defined.
* N.B.:
* - reading from a code address should increment the instruction pointer
* (called "cip")
* - only cell-sized accesses occur in code memory
*/
#if !defined _RCODE
#define _RCODE() ( *cip++ )
#endif
#if !defined GETPARAM
#define GETPARAM(v) ( v=_RCODE() ) /* read a parameter from the opcode stream */
#endif
#if !defined SKIPPARAM
#define SKIPPARAM(n) ( cip=(cell *)cip+(n) ) /* for obsolete opcodes */
#endif
#define AMXPUSH(v) ( amx->stk-=sizeof(cell), *(cell*)(data+amx->stk)=(v) )
#define ABORT(amx,v) { (amx)->stk=reset_stk; (amx)->hea=reset_hea; return v; }
#if !defined AMX_ALTCORE
int amx_exec_list(AMX *amx,const cell **opcodelist,int *numopcodes)
{
(void)amx;
assert(opcodelist!=NULL);
*opcodelist=NULL;
assert(numopcodes!=NULL);
*numopcodes=OP_NUM_OPCODES;
return 0;
}
#endif
int AMXAPI amx_Exec(AMX *amx, cell *retval, int index)
{
AMX_HEADER *hdr;
AMX_FUNCSTUB *func;
unsigned char *data;
cell reset_stk,reset_hea;
int i;
#if !defined AMX_ALTCORE
cell pri,alt,stk,frm,hea;
cell *cip,op,offs,val;
#endif
assert(amx!=NULL);
if ((amx->flags & AMX_FLAG_INIT)==0)
return AMX_ERR_INIT;
if (amx->callback==NULL)
return AMX_ERR_CALLBACK;
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
if ((amx->flags & AMX_FLAG_NTVREG)==0) {
/* verify that all native functions have been registered (or do not
* need registering)
*/
int numnatives;
assert(hdr->natives<=hdr->libraries);
numnatives=NUMENTRIES(hdr,natives,libraries);
func=GETENTRY(hdr,natives,0);
for (i=0; i<numnatives && func->address!=0; i++)
func=(AMX_FUNCSTUB*)((unsigned char*)func+hdr->defsize);
if (i<numnatives)
return AMX_ERR_NOTFOUND;
amx->flags|=AMX_FLAG_NTVREG; /* no need to check this again */
} /* if */
assert((amx->flags & AMX_FLAG_VERIFY)==0);
/* set up the registers */
assert(hdr!=NULL && hdr->magic==AMX_MAGIC);
assert(amx->code!=NULL || hdr->overlays!=hdr->nametable);
data=(amx->data!=NULL) ? amx->data : amx->base+(int)hdr->dat;
reset_stk=amx->stk;
reset_hea=amx->hea;
amx->error=AMX_ERR_NONE;
/* get the start address */
if (index==AMX_EXEC_MAIN) {
if (hdr->cip<0)
return AMX_ERR_INDEX;
amx->cip=hdr->cip;
if (hdr->overlays!=hdr->nametable) {
assert(hdr->overlays!=0);
assert(amx->overlay!=NULL);
amx->ovl_index=(int)hdr->cip;
if ((i=amx->overlay(amx,amx->ovl_index))!=AMX_ERR_NONE)
return i;
amx->cip=0;
} /* if */
} else if (index==AMX_EXEC_CONT) {
/* restore registers reset_stk & reset_hea */
reset_stk=amx->reset_stk;
reset_hea=amx->reset_hea;
if (hdr->overlays!=hdr->nametable) {
assert(hdr->overlays!=0);
assert(amx->overlay!=NULL);
if ((i=amx->overlay(amx,amx->ovl_index))!=AMX_ERR_NONE)
return i;
} /* if */
} else if (index<0) {
return AMX_ERR_INDEX;
} else {
if (index>=(int)NUMENTRIES(hdr,publics,natives))
return AMX_ERR_INDEX;
func=GETENTRY(hdr,publics,index);
amx->cip=func->address;
if (hdr->overlays!=hdr->nametable) {
assert(hdr->overlays!=0);
assert(amx->overlay!=NULL);
amx->ovl_index=func->address;
if ((i=amx->overlay(amx,amx->ovl_index))!=AMX_ERR_NONE)
return i;
amx->cip=0;
} /* if */
} /* if */
/* check values just copied */
if (amx->stk>amx->stp)
return AMX_ERR_STACKLOW;
if (amx->hea<amx->hlw)
return AMX_ERR_HEAPLOW;
assert(check_endian());
/* sanity checks */
assert_static(OP_XCHG==21);
assert_static(OP_SMUL==42);
assert_static(OP_MOVS==64);
#if !defined AMX_NO_MACRO_INSTR
assert_static(OP_LIDX==81);
assert_static(OP_ZERO_PRI==102);
assert_static(OP_LOAD2==120);
#endif
#if !defined AMX_NO_PACKED_OPC
assert_static(OP_LOAD_P_PRI==124);
assert_static(OP_ALIGN_P_PRI==141);
assert_static(OP_BOUNDS_P==174);
#endif
#if PAWN_CELL_SIZE==16
assert_static(sizeof(cell)==2);
#elif PAWN_CELL_SIZE==32
assert_static(sizeof(cell)==4);
#elif PAWN_CELL_SIZE==64
assert_static(sizeof(cell)==8);
#else
#error Unsupported cell size
#endif
if (index!=AMX_EXEC_CONT) {
reset_stk+=amx->paramcount*sizeof(cell);
AMXPUSH(amx->paramcount*sizeof(cell));
amx->paramcount=0; /* push the parameter count to the stack & reset */
AMXPUSH(0); /* return address (for overlays: overlay 0, offset 0) */
} /* if */
/* check stack/heap before starting to run */
if (amx->hea+STKMARGIN>amx->stk)
return AMX_ERR_STACKERR;
#if defined AMX_ALTCORE
/* start running either the ARM or 80x86 assembler abstract machine or the JIT */
#if defined AMX_ASM && defined AMX_JIT
if ((amx->flags & AMX_FLAG_JITC)!=0)
i = amx_jit_run(amx,retval,data);
else
i = amx_exec_run(amx,retval,data);
#elif defined AMX_JIT
i = amx_jit_run(amx,retval,data);
#else
/* also for GNU GCC and Intel C/C++ versions */
i = amx_exec_run(amx,retval,data);
#endif
if (i == AMX_ERR_SLEEP) {
amx->reset_stk=reset_stk;
amx->reset_hea=reset_hea;
} else {
/* remove parameters from the stack; do this the "hard" way, because
* the assembler version has no internal knowledge of the local
* variables, so any "clean" way would be a kludge anyway.
*/
amx->stk=reset_stk;
amx->hea=reset_hea;
} /* if */
return i;
#else
#define CHKMARGIN() if (hea+STKMARGIN>stk) return AMX_ERR_STACKERR
#define CHKSTACK() if (stk>amx->stp) return AMX_ERR_STACKLOW
#define CHKHEAP() if (hea<amx->hlw) return AMX_ERR_HEAPLOW
/* PUSH() and POP() are defined in terms of the _R() and _W() macros */
#define PUSH(v) ( stk-=sizeof(cell), _W(data,stk,v) )
#define POP(v) ( v=_R(data,stk), stk+=sizeof(cell) )
/* set up registers for ANSI-C core: pri, alt, frm, cip, hea, stk */
pri=amx->pri;
alt=amx->alt;
frm=amx->frm;
cip=(cell *)(amx->code+(int)amx->cip);
hea=amx->hea;
stk=amx->stk;
/* start running */
for ( ;; ) {
op=_RCODE();
switch (GETOPCODE(op)) {
/* core instruction set */
case OP_NOP:
break;
case OP_LOAD_PRI:
GETPARAM(offs);
pri=_R(data,offs);
break;
case OP_LOAD_ALT:
GETPARAM(offs);
alt=_R(data,offs);
break;
case OP_LOAD_S_PRI:
GETPARAM(offs);
pri=_R(data,frm+offs);
break;
case OP_LOAD_S_ALT:
GETPARAM(offs);
alt=_R(data,frm+offs);
break;
case OP_LREF_S_PRI:
GETPARAM(offs);
offs=_R(data,frm+offs);
pri=_R(data,offs);
break;
case OP_LREF_S_ALT:
GETPARAM(offs);
offs=_R(data,frm+offs);
alt=_R(data,offs);
break;
case OP_LOAD_I:
/* verify address */
if (pri>=hea && pri<stk || (ucell)pri>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
pri=_R(data,pri);
break;
case OP_LODB_I:
GETPARAM(offs);
__lodb_i:
/* verify address */
if (pri>=hea && pri<stk || (ucell)pri>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
switch ((int)offs) {
case 1:
pri=_R8(data,pri);
break;
case 2:
pri=_R16(data,pri);
break;
case 4:
pri=_R32(data,pri);
break;
} /* switch */
break;
case OP_CONST_PRI:
GETPARAM(pri);
break;
case OP_CONST_ALT:
GETPARAM(alt);
break;
case OP_ADDR_PRI:
GETPARAM(pri);
pri+=frm;
break;
case OP_ADDR_ALT:
GETPARAM(alt);
alt+=frm;
break;
case OP_STOR:
GETPARAM(offs);
_W(data,offs,pri);
break;
case OP_STOR_S:
GETPARAM(offs);
_W(data,frm+offs,pri);
break;
case OP_SREF_S:
GETPARAM(offs);
offs=_R(data,frm+offs);
_W(data,offs,pri);
break;
case OP_STOR_I:
/* verify address */
if (alt>=hea && alt<stk || (ucell)alt>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
_W(data,alt,pri);
break;
case OP_STRB_I:
GETPARAM(offs);
__strb_i:
/* verify address */
if (alt>=hea && alt<stk || (ucell)alt>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
switch ((int)offs) {
case 1:
_W8(data,alt,pri);
break;
case 2:
_W16(data,alt,pri);
break;
case 4:
_W32(data,alt,pri);
break;
} /* switch */
break;
case OP_ALIGN_PRI:
GETPARAM(offs);
#if BYTE_ORDER==LITTLE_ENDIAN
if ((size_t)offs<sizeof(cell))
pri ^= sizeof(cell)-offs;
#endif
break;
case OP_LCTRL:
GETPARAM(offs);
switch ((int)offs) {
case 0:
pri=hdr->cod;
break;
case 1:
pri=hdr->dat;
break;
case 2:
pri=hea;
break;
case 3:
pri=amx->stp;
break;
case 4:
pri=stk;
break;
case 5:
pri=frm;
break;
case 6:
pri=(cell)((unsigned char *)cip-amx->code);
break;
} /* switch */
break;
case OP_SCTRL:
GETPARAM(offs);
switch ((int)offs) {
case 0:
case 1:
case 3:
/* cannot change these parameters */
break;
case 2:
hea=pri;
break;
case 4:
stk=pri;
break;
case 5:
frm=pri;
break;
case 6:
cip=(cell *)(amx->code + (int)pri);
break;
} /* switch */
break;
case OP_XCHG:
offs=pri; /* offs is a temporary variable */
pri=alt;
alt=offs;
break;
case OP_PUSH_PRI:
PUSH(pri);
break;
case OP_PUSH_ALT:
PUSH(alt);
break;
case OP_PUSHR_PRI:
PUSH((intptr_t)data+pri);
break;
case OP_POP_PRI:
POP(pri);
break;
case OP_POP_ALT:
POP(alt);
break;
case OP_PICK:
GETPARAM(offs);
pri=_R(data,stk+offs);
break;
case OP_STACK:
GETPARAM(offs);
alt=stk;
stk+=offs;
CHKMARGIN();
CHKSTACK();
break;
case OP_HEAP:
GETPARAM(offs);
alt=hea;
hea+=offs;
CHKMARGIN();
CHKHEAP();
break;
case OP_PROC:
PUSH(frm);
frm=stk;
CHKMARGIN();
break;
case OP_RET:
POP(frm);
POP(offs);
/* verify the return address */
if ((long)offs>=amx->codesize)
ABORT(amx,AMX_ERR_MEMACCESS);
cip=(cell *)(amx->code+(int)offs);
break;
case OP_RETN:
POP(frm);
POP(offs);
/* verify the return address */
if ((long)offs>=amx->codesize)
ABORT(amx,AMX_ERR_MEMACCESS);
cip=(cell *)(amx->code+(int)offs);
stk+=_R(data,stk)+sizeof(cell); /* remove parameters from the stack */
break;
case OP_CALL:
PUSH(((unsigned char *)cip-amx->code)+sizeof(cell));/* skip address */
cip=JUMPREL(cip); /* jump to the address */
break;
case OP_JUMP:
/* since the GETPARAM() macro modifies cip, you cannot
* do GETPARAM(cip) directly */
cip=JUMPREL(cip);
break;
case OP_JZER:
if (pri==0)
cip=JUMPREL(cip);
else
SKIPPARAM(1);
break;
case OP_JNZ:
if (pri!=0)
cip=JUMPREL(cip);
else
SKIPPARAM(1);
break;
case OP_SHL:
pri<<=alt;
break;
case OP_SHR:
pri=(ucell)pri >> (int)alt;
break;
case OP_SSHR:
pri>>=alt;
break;
case OP_SHL_C_PRI:
GETPARAM(offs);
pri<<=offs;
break;
case OP_SHL_C_ALT:
GETPARAM(offs);
alt<<=offs;
break;
case OP_SMUL:
pri*=alt;
break;
case OP_SDIV:
if (pri==0)
ABORT(amx,AMX_ERR_DIVIDE);
/* use floored division and matching remainder */
offs=pri;
#if defined TRUNC_SDIV
pri=alt/offs;
alt=alt%offs;
#else
val=alt; /* portable routine for truncated division */
pri=IABS(alt)/IABS(offs);
if ((cell)(val ^ offs)<0)
pri=-pri;
alt=val-pri*offs; /* calculate the matching remainder */
#endif
/* now "fiddle" with the values to get floored division */
if (alt!=0 && (cell)(alt ^ offs)<0) {
pri--;
alt+=offs;
} /* if */
break;
case OP_ADD:
pri+=alt;
break;
case OP_SUB:
pri=alt-pri;
break;
case OP_AND:
pri&=alt;
break;
case OP_OR:
pri|=alt;
break;
case OP_XOR:
pri^=alt;
break;
case OP_NOT:
pri=!pri;
break;
case OP_NEG:
pri=-pri;
break;
case OP_INVERT:
pri=~pri;
break;
case OP_EQ:
pri= pri==alt ? 1 : 0;
break;
case OP_NEQ:
pri= pri!=alt ? 1 : 0;
break;
case OP_SLESS:
pri= pri<alt ? 1 : 0;
break;
case OP_SLEQ:
pri= pri<=alt ? 1 : 0;
break;
case OP_SGRTR:
pri= pri>alt ? 1 : 0;
break;
case OP_SGEQ:
pri= pri>=alt ? 1 : 0;
break;
case OP_INC_PRI:
pri++;
break;
case OP_INC_ALT:
alt++;
break;
case OP_INC_I:
#if defined _R_DEFAULT
*(cell *)(data+(int)pri) += 1;
#else
val=_R(data,pri);
_W(data,pri,val+1);
#endif
break;
case OP_DEC_PRI:
pri--;
break;
case OP_DEC_ALT:
alt--;
break;
case OP_DEC_I:
#if defined _R_DEFAULT
*(cell *)(data+(int)pri) -= 1;
#else
val=_R(data,pri);
_W(data,pri,val-1);
#endif
break;
case OP_MOVS:
GETPARAM(offs);
__movs:
/* verify top & bottom memory addresses, for both source and destination
* addresses
*/
if (pri>=hea && pri<stk || (ucell)pri>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
if ((pri+offs)>hea && (pri+offs)<stk || (ucell)(pri+offs)>(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
if (alt>=hea && alt<stk || (ucell)alt>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
if ((alt+offs)>hea && (alt+offs)<stk || (ucell)(alt+offs)>(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
#if defined _R_DEFAULT
memcpy(data+(int)alt, data+(int)pri, (int)offs);
#else
for (i=0; i+4<offs; i+=4) {
val=_R32(data,pri+i);
_W32(data,alt+i,val);
} /* for */
for ( ; i<offs; i++) {
val=_R8(data,pri+i);
_W8(data,alt+i,val);
} /* for */
#endif
break;
case OP_CMPS:
GETPARAM(offs);
__cmps:
/* verify top & bottom memory addresses, for both source and destination
* addresses
*/
if (pri>=hea && pri<stk || (ucell)pri>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
if ((pri+offs)>hea && (pri+offs)<stk || (ucell)(pri+offs)>(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
if (alt>=hea && alt<stk || (ucell)alt>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
if ((alt+offs)>hea && (alt+offs)<stk || (ucell)(alt+offs)>(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
#if defined _R_DEFAULT
pri=memcmp(data+(int)alt, data+(int)pri, (int)offs);
#else
pri=0;
for (i=0; i+4<offs && pri==0; i+=4)
pri=_R32(data,alt+i)-_R32(data,pri+i);
for ( ; i<offs && pri==0; i++)
pri=_R8(data,alt+i)-_R8(data,pri+i);
#endif
break;
case OP_FILL:
GETPARAM(offs);
__fill:
/* verify top & bottom memory addresses (destination only) */
if (alt>=hea && alt<stk || (ucell)alt>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
if ((alt+offs)>hea && (alt+offs)<stk || (ucell)(alt+offs)>(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
for (i=(int)alt; (size_t)offs>=sizeof(cell); i+=sizeof(cell), offs-=sizeof(cell))
_W32(data,i,pri);
break;
case OP_HALT:
GETPARAM(offs);
__halt:
if (retval!=NULL)
*retval=pri;
/* store complete status (stk and hea are already set in the ABORT macro) */
amx->frm=frm;
amx->pri=pri;
amx->alt=alt;
amx->cip=(cell)((unsigned char*)cip-amx->code);
if (offs==AMX_ERR_SLEEP) {
amx->stk=stk;
amx->hea=hea;
amx->reset_stk=reset_stk;
amx->reset_hea=reset_hea;
return (int)offs;
} /* if */
ABORT(amx,(int)offs);
case OP_BOUNDS:
GETPARAM(offs);
if ((ucell)pri>(ucell)offs) {
amx->cip=(cell)((unsigned char *)cip-amx->code);
ABORT(amx,AMX_ERR_BOUNDS);
} /* if */
break;
case OP_SYSREQ:
GETPARAM(offs);
/* save a few registers */
amx->cip=(cell)((unsigned char *)cip-amx->code);
amx->hea=hea;
amx->frm=frm;
amx->stk=stk;
i=amx->callback(amx,offs,&pri,(cell *)(data+(int)stk));
if (i!=AMX_ERR_NONE) {
if (i==AMX_ERR_SLEEP) {
amx->pri=pri;
amx->alt=alt;
amx->reset_stk=reset_stk;
amx->reset_hea=reset_hea;
return i;
} /* if */
ABORT(amx,i);
} /* if */
break;
case OP_SWITCH: {
cell *cptr=JUMPREL(cip)+1;/* +1, to skip the "casetbl" opcode */
assert(*JUMPREL(cip)==OP_CASETBL);
cip=JUMPREL(cptr+1); /* preset to "none-matched" case */
i=(int)*cptr; /* number of records in the case table */
for (cptr+=2; i>0 && *cptr!=pri; i--,cptr+=2)
/* nothing */;
if (i>0)
cip=JUMPREL(cptr+1); /* case found */
break;
} /* case */
case OP_SWAP_PRI:
offs=_R(data,stk);
_W32(data,stk,pri);
pri=offs;
break;
case OP_SWAP_ALT:
offs=_R(data,stk);
_W32(data,stk,alt);
alt=offs;
break;
case OP_BREAK:
assert((amx->flags & AMX_FLAG_VERIFY)==0);
if (amx->debug!=NULL) {
/* store status */
amx->frm=frm;
amx->stk=stk;
amx->hea=hea;
amx->cip=(cell)((unsigned char*)cip-amx->code);
i=amx->debug(amx);
if (i!=AMX_ERR_NONE) {
if (i==AMX_ERR_SLEEP) {
amx->pri=pri;
amx->alt=alt;
amx->reset_stk=reset_stk;
amx->reset_hea=reset_hea;
return i;
} /* if */
ABORT(amx,i);
} /* if */
} /* if */
break;
#if !defined AMX_DONT_RELOCATE
case OP_SYSREQ_D: /* see SYSREQ */
GETPARAM(offs);
/* save a few registers */
amx->cip=(cell)((unsigned char *)cip-amx->code);
amx->hea=hea;
amx->frm=frm;
amx->stk=stk;
pri=((AMX_NATIVE)(intptr_t)offs)(amx,(cell*)(data+(int)stk));
if (amx->error!=AMX_ERR_NONE) {
if (amx->error==AMX_ERR_SLEEP) {
amx->pri=pri;
amx->alt=alt;
amx->reset_stk=reset_stk;
amx->reset_hea=reset_hea;
return AMX_ERR_SLEEP;
} /* if */
ABORT(amx,amx->error);
} /* if */
break;
#endif
#if !defined AMX_NO_MACRO_INSTR && !defined AMX_DONT_RELOCATE
case OP_SYSREQ_ND: /* see SYSREQ_N */
GETPARAM(offs);
GETPARAM(val);
PUSH(val);
/* save a few registers */
amx->cip=(cell)((unsigned char *)cip-amx->code);
amx->hea=hea;
amx->frm=frm;
amx->stk=stk;
pri=((AMX_NATIVE)(intptr_t)offs)(amx,(cell*)(data+(int)stk));
stk+=val+4;
if (amx->error!=AMX_ERR_NONE) {
if (amx->error==AMX_ERR_SLEEP) {
amx->pri=pri;
amx->alt=alt;
amx->stk=stk;
amx->reset_stk=reset_stk;
amx->reset_hea=reset_hea;
return AMX_ERR_SLEEP;
} /* if */
ABORT(amx,amx->error);
} /* if */
break;
#endif
/* overlay instructions */
#if !defined AMX_NO_OVERLAY
case OP_CALL_OVL:
offs=(cell)((unsigned char *)cip-amx->code+sizeof(cell)); /* skip address */
assert(offs>=0 && offs<(1<<(sizeof(cell)*4)));
PUSH((offs<<(sizeof(cell)*4)) | amx->ovl_index);
amx->ovl_index=(int)*cip;
assert(amx->overlay!=NULL);
if ((i=amx->overlay(amx,amx->ovl_index))!=AMX_ERR_NONE)
ABORT(amx,i);
cip=(cell*)amx->code;
break;
case OP_RETN_OVL:
assert(amx->overlay!=NULL);
POP(frm);
POP(offs);
amx->ovl_index=offs & (((ucell)~0)>>4*sizeof(cell));
offs=(ucell)offs >> (sizeof(cell)*4);
/* verify the index */
stk+=_R(data,stk)+sizeof(cell); /* remove parameters from the stack */
i=amx->overlay(amx,amx->ovl_index); /* reload overlay */
if (i!=AMX_ERR_NONE || (long)offs>=amx->codesize)
ABORT(amx,AMX_ERR_MEMACCESS);
cip=(cell *)(amx->code+(int)offs);
break;
case OP_SWITCH_OVL: {
cell *cptr=JUMPREL(cip)+1; /* +1, to skip the "icasetbl" opcode */
assert(*JUMPREL(cip)==OP_CASETBL_OVL);
amx->ovl_index=*(cptr+1); /* preset to "none-matched" case */
i=(int)*cptr; /* number of records in the case table */
for (cptr+=2; i>0 && *cptr!=pri; i--,cptr+=2)
/* nothing */;
if (i>0)
amx->ovl_index=*(cptr+1); /* case found */
assert(amx->overlay!=NULL);
if ((i=amx->overlay(amx,amx->ovl_index))!=AMX_ERR_NONE)
ABORT(amx,i);
cip=(cell*)amx->code;
break;
} /* case */
#endif
/* supplemental and macro instructions */
#if !defined AMX_NO_MACRO_INSTR
case OP_LIDX:
offs=pri*sizeof(cell)+alt;
/* verify address */
if (offs>=hea && offs<stk || (ucell)offs>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
pri=_R(data,offs);
break;
case OP_LIDX_B:
GETPARAM(offs);
offs=(pri << (int)offs)+alt;
/* verify address */
if (offs>=hea && offs<stk || (ucell)offs>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
pri=_R(data,offs);
break;
case OP_IDXADDR:
pri=pri*sizeof(cell)+alt;
break;
case OP_IDXADDR_B:
GETPARAM(offs);
pri=(pri << (int)offs)+alt;
break;
case OP_PUSH_C:
GETPARAM(offs);
PUSH(offs);
break;
case OP_PUSH:
GETPARAM(offs);
PUSH(_R(data,offs));
break;
case OP_PUSH_S:
GETPARAM(offs);
PUSH(_R(data,frm+offs));
break;
case OP_PUSH_ADR:
GETPARAM(offs);
PUSH(frm+offs);
break;
case OP_PUSHR_C:
GETPARAM(offs);
PUSH((intptr_t)data+offs);
break;
case OP_PUSHR_S:
GETPARAM(offs);
PUSH((intptr_t)data+_R(data,frm+offs));
break;
case OP_PUSHR_ADR:
GETPARAM(offs);
PUSH((intptr_t)data+frm+offs);
break;
case OP_JEQ:
if (pri==alt)
cip=JUMPREL(cip);
else
SKIPPARAM(1);
break;
case OP_JNEQ:
if (pri!=alt)
cip=JUMPREL(cip);
else
SKIPPARAM(1);
break;
case OP_JSLESS:
if (pri<alt)
cip=JUMPREL(cip);
else
SKIPPARAM(1);
break;
case OP_JSLEQ:
if (pri<=alt)
cip=JUMPREL(cip);
else
SKIPPARAM(1);
break;
case OP_JSGRTR:
if (pri>alt)
cip=JUMPREL(cip);
else
SKIPPARAM(1);
break;
case OP_JSGEQ:
if (pri>=alt)
cip=JUMPREL(cip);
else
SKIPPARAM(1);
break;
case OP_SDIV_INV:
if (alt==0)
ABORT(amx,AMX_ERR_DIVIDE);
/* use floored division and matching remainder */
offs=alt;
#if defined TRUNC_SDIV
pri=pri/offs;
alt=pri%offs;
#else
val=pri; /* portable routine for truncated division */
pri=IABS(pri)/IABS(offs);
if ((cell)(val ^ offs)<0)
pri=-pri;
alt=val-pri*offs; /* calculate the matching remainder */
#endif
/* now "fiddle" with the values to get floored division */
if (alt!=0 && (cell)(alt ^ offs)<0) {
pri--;
alt+=offs;
} /* if */
break;
case OP_SUB_INV:
pri-=alt;
break;
case OP_ADD_C:
GETPARAM(offs);
pri+=offs;
break;
case OP_SMUL_C:
GETPARAM(offs);
pri*=offs;
break;
case OP_ZERO_PRI:
pri=0;
break;
case OP_ZERO_ALT:
alt=0;
break;
case OP_ZERO:
GETPARAM(offs);
_W(data,offs,0);
break;
case OP_ZERO_S:
GETPARAM(offs);
_W(data,frm+offs,0);
break;
case OP_EQ_C_PRI:
GETPARAM(offs);
pri= pri==offs ? 1 : 0;
break;
case OP_EQ_C_ALT:
GETPARAM(offs);
pri= alt==offs ? 1 : 0;
break;
case OP_INC:
GETPARAM(offs);
#if defined _R_DEFAULT
*(cell *)(data+(int)offs) += 1;
#else
val=_R(data,offs);
_W(data,offs,val+1);
#endif
break;
case OP_INC_S:
GETPARAM(offs);
#if defined _R_DEFAULT
*(cell *)(data+(int)(frm+offs)) += 1;
#else
val=_R(data,frm+offs);
_W(data,frm+offs,val+1);
#endif
break;
case OP_DEC:
GETPARAM(offs);
#if defined _R_DEFAULT
*(cell *)(data+(int)offs) -= 1;
#else
val=_R(data,offs);
_W(data,offs,val-1);
#endif
break;
case OP_DEC_S:
GETPARAM(offs);
#if defined _R_DEFAULT
*(cell *)(data+(int)(frm+offs)) -= 1;
#else
val=_R(data,frm+offs);
_W(data,frm+offs,val-1);
#endif
break;
case OP_SYSREQ_N:
GETPARAM(offs);
GETPARAM(val);
PUSH(val);
/* save a few registers */
amx->cip=(cell)((unsigned char *)cip-amx->code);
amx->hea=hea;
amx->frm=frm;
amx->stk=stk;
i=amx->callback(amx,offs,&pri,(cell *)(data+(int)stk));
stk+=val+4;
if (i!=AMX_ERR_NONE) {
if (i==AMX_ERR_SLEEP) {
amx->pri=pri;
amx->alt=alt;
amx->stk=stk;
amx->reset_stk=reset_stk;
amx->reset_hea=reset_hea;
return i;
} /* if */
ABORT(amx,i);
} /* if */
break;
case OP_PUSHM_C:
GETPARAM(val);
while (val--) {
GETPARAM(offs);
PUSH(offs);
} /* while */
break;
case OP_PUSHM:
GETPARAM(val);
while (val--) {
GETPARAM(offs);
PUSH(_R(data,offs));
} /* while */
break;
case OP_PUSHM_S:
GETPARAM(val);
while (val--) {
GETPARAM(offs);
PUSH(_R(data,frm+offs));
} /* while */
break;
case OP_PUSHM_ADR:
GETPARAM(val);
while (val--) {
GETPARAM(offs);
PUSH(frm+offs);
} /* while */
break;
case OP_PUSHRM_C:
GETPARAM(val);
while (val--) {
GETPARAM(offs);
PUSH((intptr_t)data+offs);
} /* while */
break;
case OP_PUSHRM_S:
GETPARAM(val);
while (val--) {
GETPARAM(offs);
PUSH((intptr_t)data+_R(data,frm+offs));
} /* while */
break;
case OP_PUSHRM_ADR:
GETPARAM(val);
while (val--) {
GETPARAM(offs);
PUSH((intptr_t)data+frm+offs);
} /* while */
break;
case OP_LOAD2:
GETPARAM(offs);
pri=_R(data,offs);
GETPARAM(offs);
alt=_R(data,offs);
break;
case OP_LOAD2_S:
GETPARAM(offs);
pri=_R(data,frm+offs);
GETPARAM(offs);
alt=_R(data,frm+offs);
break;
case OP_CONST:
GETPARAM(offs);
GETPARAM(val);
_W32(data,offs,val);
break;
case OP_CONST_S:
GETPARAM(offs);
GETPARAM(val);
_W32(data,frm+offs,val);
break;
#endif /* AMX_NO_MACRO_INSTR */
#if !defined AMX_NO_PACKED_OPC
case OP_LOAD_P_PRI:
GETPARAM_P(offs,op);
pri=_R(data,offs);
break;
case OP_LOAD_P_ALT:
GETPARAM_P(offs,op);
alt=_R(data,offs);
break;
case OP_LOAD_P_S_PRI:
GETPARAM_P(offs,op);
pri=_R(data,frm+offs);
break;
case OP_LOAD_P_S_ALT:
GETPARAM_P(offs,op);
alt=_R(data,frm+offs);
break;
case OP_LREF_P_S_PRI:
GETPARAM_P(offs,op);
offs=_R(data,frm+offs);
pri=_R(data,offs);
break;
case OP_LREF_P_S_ALT:
GETPARAM_P(offs,op);
offs=_R(data,frm+offs);
alt=_R(data,offs);
break;
case OP_LODB_P_I:
GETPARAM_P(offs,op);
goto __lodb_i;
case OP_CONST_P_PRI:
GETPARAM_P(pri,op);
break;
case OP_CONST_P_ALT:
GETPARAM_P(alt,op);
break;
case OP_ADDR_P_PRI:
GETPARAM_P(pri,op);
pri+=frm;
break;
case OP_ADDR_P_ALT:
GETPARAM_P(alt,op);
alt+=frm;
break;
case OP_STOR_P:
GETPARAM_P(offs,op);
_W(data,offs,pri);
break;
case OP_STOR_P_S:
GETPARAM_P(offs,op);
_W(data,frm+offs,pri);
break;
case OP_SREF_P_S:
GETPARAM_P(offs,op);
offs=_R(data,frm+offs);
_W(data,offs,pri);
break;
case OP_STRB_P_I:
GETPARAM_P(offs,op);
goto __strb_i;
case OP_LIDX_P_B:
GETPARAM_P(offs,op);
offs=(pri << (int)offs)+alt;
/* verify address */
if (offs>=hea && offs<stk || (ucell)offs>=(ucell)amx->stp)
ABORT(amx,AMX_ERR_MEMACCESS);
pri=_R(data,offs);
break;
case OP_IDXADDR_P_B:
GETPARAM_P(offs,op);
pri=(pri << (int)offs)+alt;
break;
case OP_ALIGN_P_PRI:
GETPARAM_P(offs,op);
#if BYTE_ORDER==LITTLE_ENDIAN
if ((size_t)offs<sizeof(cell))
pri ^= sizeof(cell)-offs;
#endif
break;
case OP_PUSH_P_C:
GETPARAM_P(offs,op);
PUSH(offs);
break;
case OP_PUSH_P:
GETPARAM_P(offs,op);
PUSH(_R(data,offs));
break;
case OP_PUSH_P_S:
GETPARAM_P(offs,op);
PUSH(_R(data,frm+offs));
break;
case OP_PUSH_P_ADR:
GETPARAM_P(offs,op);
PUSH(frm+offs);
break;
case OP_PUSHR_P_C:
GETPARAM_P(offs,op);
PUSH((intptr_t)data+offs);
break;
case OP_PUSHR_P_S:
GETPARAM_P(offs,op);
PUSH((intptr_t)data+_R(data,frm+offs));
break;
case OP_PUSHR_P_ADR:
GETPARAM_P(offs,op);
PUSH((intptr_t)data+frm+offs);
break;
case OP_PUSHM_P:
GETPARAM_P(val,op);
while (val--) {
GETPARAM(offs);
PUSH(_R(data,offs));
} /* while */
break;
case OP_PUSHM_P_S:
GETPARAM_P(val,op);
while (val--) {
GETPARAM(offs);
PUSH(_R(data,frm+offs));
} /* while */
break;
case OP_PUSHM_P_C:
GETPARAM_P(val,op);
while (val--) {
GETPARAM(offs);
PUSH(offs);
} /* while */
break;
case OP_PUSHM_P_ADR:
GETPARAM_P(val,op);
while (val--) {
GETPARAM(offs);
PUSH(frm+offs);
} /* while */
break;
case OP_PUSHRM_P_C:
GETPARAM_P(val,op);
while (val--) {
GETPARAM(offs);
PUSH((intptr_t)data+offs);
} /* while */
break;
case OP_PUSHRM_P_S:
GETPARAM_P(val,op);
while (val--) {
GETPARAM(offs);
PUSH((intptr_t)data+_R(data,frm+offs));
} /* while */
break;
case OP_PUSHRM_P_ADR:
GETPARAM_P(val,op);
while (val--) {
GETPARAM(offs);
PUSH((intptr_t)data+frm+offs);
} /* while */
break;
case OP_STACK_P:
GETPARAM_P(offs,op);
alt=stk;
stk+=offs;
CHKMARGIN();
CHKSTACK();
break;
case OP_HEAP_P:
GETPARAM_P(offs,op);
alt=hea;
hea+=offs;
CHKMARGIN();
CHKHEAP();
break;
case OP_SHL_P_C_PRI:
GETPARAM_P(offs,op);
pri<<=offs;
break;
case OP_SHL_P_C_ALT:
GETPARAM_P(offs,op);
alt<<=offs;
break;
case OP_ADD_P_C:
GETPARAM_P(offs,op);
pri+=offs;
break;
case OP_SMUL_P_C:
GETPARAM_P(offs,op);
pri*=offs;
break;
case OP_ZERO_P:
GETPARAM_P(offs,op);
_W(data,offs,0);
break;
case OP_ZERO_P_S:
GETPARAM_P(offs,op);
_W(data,frm+offs,0);
break;
case OP_EQ_P_C_PRI:
GETPARAM_P(offs,op);
pri= pri==offs ? 1 : 0;
break;
case OP_EQ_P_C_ALT:
GETPARAM_P(offs,op);
pri= alt==offs ? 1 : 0;
break;
case OP_INC_P:
GETPARAM_P(offs,op);
#if defined _R_DEFAULT
*(cell *)(data+(int)offs) += 1;
#else
val=_R(data,offs);
_W(data,offs,val+1);
#endif
break;
case OP_INC_P_S:
GETPARAM_P(offs,op);
#if defined _R_DEFAULT
*(cell *)(data+(int)(frm+offs)) += 1;
#else
val=_R(data,frm+offs);
_W(data,frm+offs,val+1);
#endif
break;
case OP_DEC_P:
GETPARAM_P(offs,op);
#if defined _R_DEFAULT
*(cell *)(data+(int)offs) -= 1;
#else
val=_R(data,offs);
_W(data,offs,val-1);
#endif
break;
case OP_DEC_P_S:
GETPARAM_P(offs,op);
#if defined _R_DEFAULT
*(cell *)(data+(int)(frm+offs)) -= 1;
#else
val=_R(data,frm+offs);
_W(data,frm+offs,val-1);
#endif
break;
case OP_MOVS_P:
GETPARAM_P(offs,op);
goto __movs;
case OP_CMPS_P:
GETPARAM_P(offs,op);
goto __cmps;
case OP_FILL_P:
GETPARAM_P(offs,op);
goto __fill;
case OP_HALT_P:
GETPARAM_P(offs,op);
goto __halt;
case OP_BOUNDS_P:
GETPARAM_P(offs,op);
if ((ucell)pri>(ucell)offs) {
amx->cip=(cell)((unsigned char *)cip-amx->code);
ABORT(amx,AMX_ERR_BOUNDS);
} /* if */
break;
#endif /* AMX_NO_PACKED_OPC */
default:
assert(0); /* invalid instructions should already have been caught in VerifyPcode() */
ABORT(amx,AMX_ERR_INVINSTR);
} /* switch */
} /* for */
#endif /* AMX_ALTCORE */
}
#endif /* AMX_EXEC */
#if defined AMX_SETCALLBACK
int AMXAPI amx_SetCallback(AMX *amx,AMX_CALLBACK callback)
{
assert(amx!=NULL);
assert(callback!=NULL);
amx->callback=callback;
return AMX_ERR_NONE;
}
#endif /* AMX_SETCALLBACK */
#if defined AMX_SETDEBUGHOOK
int AMXAPI amx_SetDebugHook(AMX *amx,AMX_DEBUG debug)
{
assert(amx!=NULL);
amx->debug=debug;
return AMX_ERR_NONE;
}
#endif /* AMX_SETDEBUGHOOK */
#if defined AMX_RAISEERROR
int AMXAPI amx_RaiseError(AMX *amx, int error)
{
assert(error>0);
amx->error=error;
return AMX_ERR_NONE;
}
#endif /* AMX_RAISEERROR */
#if defined AMX_ALLOT || defined AMX_PUSHXXX
int AMXAPI amx_Allot(AMX *amx,int cells,cell **address)
{
AMX_HEADER *hdr;
unsigned char *data;
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
data=(amx->data!=NULL) ? amx->data : amx->base+(int)hdr->dat;
if (amx->stk - amx->hea - cells*sizeof(cell) < STKMARGIN)
return AMX_ERR_MEMORY;
if (address!=NULL)
*address=(cell *)(data+(int)amx->hea);
amx->hea+=cells*sizeof(cell);
return AMX_ERR_NONE;
}
int AMXAPI amx_Release(AMX *amx,cell *address)
{
AMX_HEADER *hdr;
unsigned char *data;
cell amx_addr;
assert(amx!=NULL);
hdr=(AMX_HEADER *)amx->base;
assert(hdr!=NULL);
assert(hdr->magic==AMX_MAGIC);
data=(amx->data!=NULL) ? amx->data : amx->base+(int)hdr->dat;
amx_addr=(cell)((unsigned char*)address-data);
if (amx->hea>amx_addr)
amx->hea=amx_addr;
return AMX_ERR_NONE;
}
#endif /* AMX_ALLOT || AMX_PUSHXXX */
#if defined AMX_XXXSTRING || defined AMX_UTF8XXX
#define CHARBITS (8*sizeof(char))
#if PAWN_CELL_SIZE==16
#define CHARMASK (0xffffu << 8*(2-sizeof(char)))
#elif PAWN_CELL_SIZE==32
#define CHARMASK (0xffffffffuL << 8*(4-sizeof(char)))
#elif PAWN_CELL_SIZE==64
#define CHARMASK (0xffffffffffffffffuLL << 8*(8-sizeof(char)))
#else
#error Unsupported cell size
#endif
int AMXAPI amx_StrLen(const cell *cstr, int *length)
{
int len;
#if BYTE_ORDER==LITTLE_ENDIAN
cell c;
#endif
assert(length!=NULL);
if (cstr==NULL) {
*length=0;
return AMX_ERR_PARAMS;
} /* if */
if ((ucell)*cstr>UNPACKEDMAX) {
/* packed string */
assert_static(sizeof(char)==1);
len=(int)strlen((char *)cstr); /* find '\0' */
assert(check_endian());
#if BYTE_ORDER==LITTLE_ENDIAN
/* on Little Endian machines, toggle the last bytes */
c=cstr[len/sizeof(cell)]; /* get last cell */
len=len - len % sizeof(cell); /* len = multiple of "cell" bytes */
while ((c & CHARMASK)!=0) {
len++;
c <<= 8*sizeof(char);
} /* if */
#endif
} else {
for (len=0; cstr[len]!=0; len++)
/* nothing */;
} /* if */
*length = len;
return AMX_ERR_NONE;
}
#endif
#if defined AMX_XXXSTRING || defined AMX_PUSHXXX
int AMXAPI amx_SetString(cell *dest,const char *source,int pack,int use_wchar,size_t size)
{ /* the memory blocks should not overlap */
int i;
size_t len;
assert_static(UNLIMITED>0);
#if defined AMX_ANSIONLY
(void)use_wchar;
len=strlen(source);
#else
len= use_wchar ? wcslen((const wchar_t*)source) : strlen(source);
#endif
if (pack) {
/* create a packed string */
if (size<UNLIMITED/sizeof(cell) && (size_t)len>=size*sizeof(cell))
len=size*sizeof(cell)-1;
dest[len/sizeof(cell)]=0; /* clear last bytes of last (semi-filled) cell*/
#if defined AMX_ANSIONLY
memcpy(dest,source,len);
#else
if (use_wchar) {
for (i=0; i<len; i++)
((char*)dest)[i]=(char)(((wchar_t*)source)[i]);
} else {
memcpy(dest,source,len);
} /* if */
#endif
/* On Big Endian machines, the characters are well aligned in the
* cells; on Little Endian machines, we must swap all cells.
*/
assert(check_endian());
#if BYTE_ORDER==LITTLE_ENDIAN
for (i=(int)(len/sizeof(cell)); i>=0; i--)
amx_SwapCell((ucell *)&dest[i]);
#endif
} else {
/* create an unpacked string */
if (size<UNLIMITED && (size_t)len>=size)
len=size-1;
#if defined AMX_ANSIONLY
for (i=0; i<len; i++)
dest[i]=(cell)source[i];
#else
if (use_wchar) {
for (i=0; i<len; i++)
dest[i]=(cell)(((wchar_t*)source)[i]);
} else {
for (i=0; i<len; i++)
dest[i]=(cell)source[i];
} /* if */
#endif
dest[len]=0;
} /* if */
return AMX_ERR_NONE;
}
#endif
#if defined AMX_XXXSTRING
int AMXAPI amx_GetString(char *dest,const cell *source,int use_wchar,size_t size)
{
int len=0;
#if defined AMX_ANSIONLY
(void)use_wchar; /* unused parameter (if ANSI only) */
#endif
if ((ucell)*source>UNPACKEDMAX) {
/* source string is packed */
cell c=0; /* initialize to 0 to avoid a compiler warning */
int i=sizeof(cell)-1;
char ch;
while ((size_t)len<size) {
if (i==sizeof(cell)-1)
c=*source++;
ch=(char)(c >> i*CHARBITS);
if (ch=='\0')
break; /* terminating zero character found */
#if defined AMX_ANSIONLY
dest[len++]=ch;
#else
if (use_wchar)
((wchar_t*)dest)[len++]=ch;
else
dest[len++]=ch;
#endif
i=(i+sizeof(cell)-1) % sizeof(cell);
} /* while */
} else {
/* source string is unpacked */
#if defined AMX_ANSIONLY
while (*source!=0 && (size_t)len<size)
dest[len++]=(char)*source++;
#else
if (use_wchar) {
while (*source!=0 && (size_t)len<size)
((wchar_t*)dest)[len++]=(wchar_t)*source++;
} else {
while (*source!=0 && (size_t)len<size)
dest[len++]=(char)*source++;
} /* if */
#endif
} /* if */
/* store terminator */
if ((size_t)len>=size)
len=(int)size-1;
if (len>=0) {
#if defined AMX_ANSIONLY
dest[len]='\0';
#else
if (use_wchar)
((wchar_t*)dest)[len]=0;
else
dest[len]='\0';
#endif
} /* IF */
return AMX_ERR_NONE;
}
#endif /* AMX_XXXSTRING */
#if defined AMX_UTF8XXX
#if defined __BORLANDC__
#pragma warn -amb -8000 /* ambiguous operators need parentheses */
#endif
/* amx_UTF8Get()
* Extract a single UTF-8 encoded character from a string and return a pointer
* to the character just behind that UTF-8 character. The parameters "endptr"
* and "value" may be NULL.
* If the code is not valid UTF-8, "endptr" has the value of the input
* parameter "string" and "value" is zero.
*/
int AMXAPI amx_UTF8Get(const char *string, const char **endptr, cell *value)
{
static const char utf8_count[16]={ 0, 0, 0, 0, 0, 0, 0, 0, 1, 1, 1, 1, 2, 2, 3, 4 };
static const long utf8_lowmark[5] = { 0x80, 0x800, 0x10000L, 0x200000L, 0x4000000L };
unsigned char c;
cell result;
int followup;
assert(string!=NULL);
if (value!=NULL) /* preset, in case of an error */
*value=0;
if (endptr!=NULL)
*endptr=string;
c = *(const unsigned char*)string++;
if (c<0x80) {
/* ASCII */
result=c;
} else {
if (c<0xc0 || c>=0xfe)
return AMX_ERR_PARAMS; /* invalid or "follower" code, quit with error */
/* At this point we know that the two top bits of c are ones. The two
* bottom bits are always part of the code. We only need to consider
* the 4 remaining bits; i.e., a 16-byte table. This is "utf8_count[]".
* (Actually the utf8_count[] table records the number of follow-up
* bytes minus 1. This is just for convenience.)
*/
assert((c & 0xc0)==0xc0);
followup=(int)utf8_count[(c >> 2) & 0x0f];
/* The mask depends on the code length; this is just a very simple
* relation.
*/
#define utf8_mask (0x1f >> followup)
result= c & utf8_mask;
/* Collect the follow-up codes using a drop-through switch statement;
* this avoids a loop. In each case, verify the two leading bits.
*/
assert(followup>=0 && followup<=4);
switch (followup) {
case 4:
if (((c=*string++) & 0xc0) != 0x80) goto error;
result = (result << 6) | c & 0x3f;
case 3:
if (((c=*string++) & 0xc0) != 0x80) goto error;
result = (result << 6) | c & 0x3f;
case 2:
if (((c=*string++) & 0xc0) != 0x80) goto error;
result = (result << 6) | c & 0x3f;
case 1:
if (((c=*string++) & 0xc0) != 0x80) goto error;
result = (result << 6) | c & 0x3f;
case 0:
if (((c=*string++) & 0xc0) != 0x80) goto error;
result = (result << 6) | c & 0x3f;
} /* switch */
/* Do additional checks: shortest encoding & reserved positions. The
* lowmark limits also depends on the code length; it can be read from
* a table with 5 elements. This is "utf8_lowmark[]".
*/
if (result<utf8_lowmark[followup])
goto error;
if (result>=0xd800 && result<=0xdfff || result==0xfffe || result==0xffff)
goto error;
} /* if */
if (value!=NULL)
*value=result;
if (endptr!=NULL)
*endptr=string;
return AMX_ERR_NONE;
error:
return AMX_ERR_PARAMS;
}
/* amx_UTF8Put()
* Encode a single character into a byte string. The character may result in
* a string of up to 6 bytes. The function returns an error code if "maxchars"
* is lower than the required number of characters; in this case nothing is
* stored.
* The function does not zero-terminate the string.
*/
int AMXAPI amx_UTF8Put(char *string, char **endptr, int maxchars, cell value)
{
assert(string!=NULL);
if (endptr!=NULL) /* preset, in case of an error */
*endptr=string;
if (value<0x80) {
/* 0xxxxxxx */
if (maxchars < 1) goto error;
*string++ = (char)value;
} else if (value<0x800) {
/* 110xxxxx 10xxxxxx */
if (maxchars < 2) goto error;
*string++ = (char)((value>>6) & 0x1f | 0xc0);
*string++ = (char)(value & 0x3f | 0x80);
} else if (value<0x10000) {
/* 1110xxxx 10xxxxxx 10xxxxxx (16 bits, BMP plane) */
if (maxchars < 3) goto error;
if (value>=0xd800 && value<=0xdfff || value==0xfffe || value==0xffff)
goto error; /* surrogate pairs and invalid characters */
*string++ = (char)((value>>12) & 0x0f | 0xe0);
*string++ = (char)((value>>6) & 0x3f | 0x80);
*string++ = (char)(value & 0x3f | 0x80);
} else if (value<0x200000) {
/* 11110xxx 10xxxxxx 10xxxxxx 10xxxxxx */
if (maxchars < 4) goto error;
*string++ = (char)((value>>18) & 0x07 | 0xf0);
*string++ = (char)((value>>12) & 0x3f | 0x80);
*string++ = (char)((value>>6) & 0x3f | 0x80);
*string++ = (char)(value & 0x3f | 0x80);
} else if (value<0x4000000) {
/* 111110xx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx */
if (maxchars < 5) goto error;
*string++ = (char)((value>>24) & 0x03 | 0xf8);
*string++ = (char)((value>>18) & 0x3f | 0x80);
*string++ = (char)((value>>12) & 0x3f | 0x80);
*string++ = (char)((value>>6) & 0x3f | 0x80);
*string++ = (char)(value & 0x3f | 0x80);
} else {
/* 1111110x 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx 10xxxxxx (31 bits) */
if (maxchars < 6) goto error;
*string++ = (char)((value>>30) & 0x01 | 0xfc);
*string++ = (char)((value>>24) & 0x3f | 0x80);
*string++ = (char)((value>>18) & 0x3f | 0x80);
*string++ = (char)((value>>12) & 0x3f | 0x80);
*string++ = (char)((value>>6) & 0x3f | 0x80);
*string++ = (char)(value & 0x3f | 0x80);
} /* if */
if (endptr!=NULL)
*endptr=string;
return AMX_ERR_NONE;
error:
return AMX_ERR_PARAMS;
}
/* amx_UTF8Check()
* Run through a zero-terminated string and check the validity of the UTF-8
* encoding. The function returns an error code, it is AMX_ERR_NONE if the
* string is valid UTF-8 (or valid ASCII for that matter).
*/
int AMXAPI amx_UTF8Check(const char *string, int *length)
{
int err=AMX_ERR_NONE;
int len=0;
while (err==AMX_ERR_NONE && *string!='\0') {
err=amx_UTF8Get(string,&string,NULL);
len++;
} /* while */
if (length!=NULL)
*length=len;
return err;
}
/* amx_UTF8Len()
* Run through a wide string and return how many 8-bit characters are needed to
* store the string in UTF-8 format. The returned cound excludes the terminating
* zero byte. The function returns an error code.
*/
int AMXAPI amx_UTF8Len(const cell *cstr, int *length)
{
int err;
assert(length!=NULL);
err=amx_StrLen(cstr, length);
if (err==AMX_ERR_NONE && (ucell)*cstr<=UNPACKEDMAX) {
char buffer[10]; /* maximum UTF-8 code is 6 characters */
char *endptr;
int len=*length, count=0;
while (len-->0) {
amx_UTF8Put(buffer, &endptr, sizeof buffer, *cstr++);
count+=(int)(endptr-buffer);
} /* while */
*length=count;
} /* while */
return err;
}
#endif /* AMX_UTF8XXX */
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