Mercurial > pub > dyncall > dyncall
view dyncall/dyncall_struct.c @ 124:6bd0974d257b
- big-endian mips fixes for return values
- cleanups
author | cslag |
---|---|
date | Mon, 04 Jul 2016 16:14:59 +0200 |
parents | 3e629dc19168 |
children | ee2b6e54b074 |
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/* Package: dyncall Library: dyncall File: dyncall/dyncall_struct.c Description: C interface to compute struct size License: Copyright (c) 2010-2015 Olivier Chafik <olivier.chafik@centraliens.net> Permission to use, copy, modify, and distribute this software for any purpose with or without fee is hereby granted, provided that the above copyright notice and this permission notice appear in all copies. THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT, INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF THIS SOFTWARE. */ #include "dyncall.h" #include "dyncall_signature.h" #include "dyncall_struct.h" #include "dyncall_alloc.h" #include <stdio.h> #include <assert.h> DCstruct* dcNewStruct(DCsize fieldCount, DCint alignment) { DCstruct* s = (DCstruct*)dcAllocMem(sizeof(DCstruct)); s->pCurrentStruct = s; s->pLastStruct = NULL; s->nextField = 0; s->fieldCount = fieldCount; s->alignment = alignment; s->size = 0; s->pFields = (DCfield*)dcAllocMem(fieldCount * sizeof(DCfield)); return s; } void dcStructField(DCstruct* s, DCint type, DCint alignment, DCsize arrayLength) { DCfield *f; if (type == DC_SIGCHAR_STRING) { assert(!"Use dcSubStruct instead !!!"); return; } assert(s && s->pCurrentStruct); assert(s->pCurrentStruct->nextField <= (DCint)s->pCurrentStruct->fieldCount - 1); f = s->pCurrentStruct->pFields + (s->pCurrentStruct->nextField++); f->type = type; f->alignment = alignment; f->arrayLength = arrayLength; f->pSubStruct = NULL; switch (type) { case DC_SIGCHAR_BOOL: f->size = sizeof(DCbool); break; case DC_SIGCHAR_CHAR: case DC_SIGCHAR_UCHAR: f->size = sizeof(DCchar); break; case DC_SIGCHAR_SHORT: case DC_SIGCHAR_USHORT: f->size = sizeof(DCshort); break; case DC_SIGCHAR_INT: case DC_SIGCHAR_UINT: f->size = sizeof(DCint); break; case DC_SIGCHAR_LONG: case DC_SIGCHAR_ULONG: f->size = sizeof(DClong); break; case DC_SIGCHAR_LONGLONG: case DC_SIGCHAR_ULONGLONG: f->size = sizeof(DClonglong); break; case DC_SIGCHAR_FLOAT: f->size = sizeof(DCfloat); break; case DC_SIGCHAR_DOUBLE: f->size = sizeof(DCdouble); break; case DC_SIGCHAR_POINTER: case DC_SIGCHAR_STRING: f->size = sizeof(DCpointer); break; default: assert(0); } } void dcSubStruct(DCstruct* s, DCsize fieldCount, DCint alignment, DCsize arrayLength) { DCfield *f = s->pCurrentStruct->pFields + (s->pCurrentStruct->nextField++); f->type = DC_SIGCHAR_STRUCT; f->arrayLength = arrayLength; f->alignment = alignment; f->pSubStruct = dcNewStruct(fieldCount, alignment); f->pSubStruct->pLastStruct = s->pCurrentStruct; s->pCurrentStruct = f->pSubStruct; } static void dcAlign(DCsize *size, DCsize alignment) { DCsize mod = (*size) % alignment; if (mod) { DCsize rest = alignment - mod; (*size) += rest; } } static void dcComputeStructSize(DCstruct* s) { DCsize i; assert(s); for (i = 0; i < s->fieldCount; i++) { DCfield *f = s->pFields + i; DCsize fieldAlignment; if (f->type == DC_SIGCHAR_STRUCT) { dcComputeStructSize(f->pSubStruct); f->size = f->pSubStruct->size; fieldAlignment = f->pSubStruct->alignment; } else { fieldAlignment = f->size; } if (!f->alignment) f->alignment = fieldAlignment; if (f->alignment > s->alignment) s->alignment = f->alignment; f->size *= f->arrayLength; /*printf("FIELD %d, size = %d, alignment = %d\n", (int)i, (int)f->size, (int)f->alignment);@@@*/ } for (i = 0; i < s->fieldCount; i++) { DCfield *f = s->pFields + i; dcAlign(&s->size, f->alignment); s->size += f->size; } dcAlign(&s->size, s->alignment); /*printf("STRUCT size = %d, alignment = %d\n", (int)s->size, (int)s->alignment);@@@*/ } void dcCloseStruct(DCstruct* s) { assert(s); assert(s->pCurrentStruct); assert(s->pCurrentStruct->nextField == s->pCurrentStruct->fieldCount); if (!s->pCurrentStruct->pLastStruct) { dcComputeStructSize(s->pCurrentStruct); } s->pCurrentStruct = s->pCurrentStruct->pLastStruct; } void dcFreeStruct(DCstruct* s) { DCsize i; assert(s); for (i = 0; i < s->fieldCount; i++) { DCfield *f = s->pFields + i; if (f->type == DC_SIGCHAR_STRUCT) dcFreeStruct(f->pSubStruct); } free(s->pFields); free(s); } DCsize dcStructSize(DCstruct* s) { assert(!s->pCurrentStruct && "Struct was not closed"); return s->size; } DCsize dcStructAlignment(DCstruct* s) { assert(!s->pCurrentStruct && "Struct was not closed"); return s->alignment; } void dcArgStructUnroll(DCCallVM* vm, DCstruct* s, DCpointer value) { DCsize i; /*printf("UNROLLING STRUCT !\n");@@@*/ assert(s && value); for (i = 0; i < s->fieldCount; i++) { DCfield *f = s->pFields + i; DCpointer p = (char*)value + f->offset; switch(f->type) { case DC_SIGCHAR_STRUCT: dcArgStruct(vm, f->pSubStruct, p); break; case DC_SIGCHAR_BOOL: dcArgBool (vm, *(DCbool*)p); break; case DC_SIGCHAR_CHAR: case DC_SIGCHAR_UCHAR: dcArgChar (vm, *(DCchar*)p); break; case DC_SIGCHAR_SHORT: case DC_SIGCHAR_USHORT: dcArgShort (vm, *(DCshort*)p); break; case DC_SIGCHAR_INT: case DC_SIGCHAR_UINT: dcArgInt (vm, *(DCint*)p); break; case DC_SIGCHAR_LONG: case DC_SIGCHAR_ULONG: dcArgLong (vm, *(DCulong*)p); break; case DC_SIGCHAR_LONGLONG: case DC_SIGCHAR_ULONGLONG: dcArgLongLong (vm, *(DCulonglong*)p); break; case DC_SIGCHAR_FLOAT: dcArgFloat (vm, *(DCfloat*)p); break; case DC_SIGCHAR_DOUBLE: dcArgDouble (vm, *(DCdouble*)p); break; case DC_SIGCHAR_POINTER: case DC_SIGCHAR_STRING: dcArgPointer (vm, *(DCpointer**)p); break; default: assert(0); } } } static DCint readInt(const char** ptr) { return strtol(*ptr, (char**)ptr, 10);/*@@@ enough*/ } DCstruct* dcDefineStruct(const char* signature) { DCstruct* s; const char* ptr = signature; DCint fieldCount = readInt(&ptr); s = dcNewStruct(fieldCount, DEFAULT_ALIGNMENT); while (*ptr) { char type = *(ptr++); if (type == DC_SIGCHAR_STRUCT) { /*dcSubStruct( @@@*/ } else { dcStructField(s, type, DEFAULT_ALIGNMENT, readInt(&ptr)); } } dcCloseStruct(s); return s; }