X-Git-Url: https://git.saurik.com/wxWidgets.git/blobdiff_plain/4946a942d77cf51e00aa56404756e124d7c11411..65702d2fe95b8ca16a9b74f53832780bf1c81970:/src/png/pngmem.c diff --git a/src/png/pngmem.c b/src/png/pngmem.c index feb8a5dfc5..e28476f707 100644 --- a/src/png/pngmem.c +++ b/src/png/pngmem.c @@ -1,9 +1,9 @@ /* pngmem.c - stub functions for memory allocation * - * libpng 1.2.4 - July 8, 2002 + * Last changed in libpng 1.2.30 [August 15, 2008] * For conditions of distribution and use, see copyright notice in png.h - * Copyright (c) 1998-2002 Glenn Randers-Pehrson + * Copyright (c) 1998-2008 Glenn Randers-Pehrson * (Version 0.96 Copyright (c) 1996, 1997 Andreas Dilger) * (Version 0.88 Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.) * @@ -16,6 +16,7 @@ #define PNG_INTERNAL #include "png.h" +#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) /* Borland DOS special memory handler */ #if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) @@ -39,14 +40,14 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) png_voidp struct_ptr; if (type == PNG_STRUCT_INFO) - size = sizeof(png_info); + size = png_sizeof(png_info); else if (type == PNG_STRUCT_PNG) - size = sizeof(png_struct); + size = png_sizeof(png_struct); else - return (png_get_copyright()); + return (png_get_copyright(NULL)); #ifdef PNG_USER_MEM_SUPPORTED - if(malloc_fn != NULL) + if (malloc_fn != NULL) { png_struct dummy_struct; png_structp png_ptr = &dummy_struct; @@ -55,7 +56,7 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) } else #endif /* PNG_USER_MEM_SUPPORTED */ - struct_ptr = (png_voidp)farmalloc(size)); + struct_ptr = (png_voidp)farmalloc(size); if (struct_ptr != NULL) png_memset(struct_ptr, 0, size); return (struct_ptr); @@ -78,7 +79,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, if (struct_ptr != NULL) { #ifdef PNG_USER_MEM_SUPPORTED - if(free_fn != NULL) + if (free_fn != NULL) { png_struct dummy_struct; png_structp png_ptr = &dummy_struct; @@ -120,15 +121,13 @@ png_malloc(png_structp png_ptr, png_uint_32 size) return (NULL); #ifdef PNG_USER_MEM_SUPPORTED - if(png_ptr->malloc_fn != NULL) - { + if (png_ptr->malloc_fn != NULL) ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of memory!"); - return (ret); - } else - return png_malloc_default(png_ptr, size); + ret = (png_malloc_default(png_ptr, size)); + if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out of memory!"); + return (ret); } png_voidp PNGAPI @@ -137,12 +136,21 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size) png_voidp ret; #endif /* PNG_USER_MEM_SUPPORTED */ + if (png_ptr == NULL || size == 0) + return (NULL); + #ifdef PNG_MAX_MALLOC_64K if (size > (png_uint_32)65536L) - png_error(png_ptr, "Cannot Allocate > 64K"); + { + png_warning(png_ptr, "Cannot Allocate > 64K"); + ret = NULL; + } + else #endif - if (size == (png_uint_32)65536L) + if (size != (size_t)size) + ret = NULL; + else if (size == (png_uint_32)65536L) { if (png_ptr->offset_table == NULL) { @@ -162,7 +170,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size) ret = NULL; } - if(png_ptr->zlib_window_bits > 14) + if (png_ptr->zlib_window_bits > 14) num_blocks = (int)(1 << (png_ptr->zlib_window_bits - 14)); else num_blocks = 1; @@ -177,34 +185,40 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size) if (table == NULL) { - if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) +#ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out Of Memory."); /* Note "O" and "M" */ else png_warning(png_ptr, "Out Of Memory."); +#endif return (NULL); } if ((png_size_t)table & 0xfff0) { - if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) +#ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Farmalloc didn't return normalized pointer"); else png_warning(png_ptr, "Farmalloc didn't return normalized pointer"); +#endif return (NULL); } png_ptr->offset_table = table; png_ptr->offset_table_ptr = farmalloc(num_blocks * - sizeof (png_bytep)); + png_sizeof(png_bytep)); if (png_ptr->offset_table_ptr == NULL) { - if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) +#ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out Of memory."); /* Note "O" and "M" */ else png_warning(png_ptr, "Out Of memory."); +#endif return (NULL); } @@ -228,10 +242,12 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size) if (png_ptr->offset_table_count >= png_ptr->offset_table_number) { - if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) +#ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out of Memory."); /* Note "o" and "M" */ else png_warning(png_ptr, "Out of Memory."); +#endif return (NULL); } @@ -240,13 +256,15 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size) else ret = farmalloc(size); +#ifndef PNG_USER_MEM_SUPPORTED if (ret == NULL) { - if (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out of memory."); /* Note "o" and "m" */ else png_warning(png_ptr, "Out of memory."); /* Note "o" and "m" */ } +#endif return (ret); } @@ -254,6 +272,7 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size) /* free a pointer allocated by png_malloc(). In the default configuration, png_ptr is not used, but is passed in case it is needed. If ptr is NULL, return without taking any action. */ + void PNGAPI png_free(png_structp png_ptr, png_voidp ptr) { @@ -274,6 +293,8 @@ png_free_default(png_structp png_ptr, png_voidp ptr) { #endif /* PNG_USER_MEM_SUPPORTED */ + if (png_ptr == NULL || ptr == NULL) return; + if (png_ptr->offset_table != NULL) { int i; @@ -325,14 +346,14 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) png_voidp struct_ptr; if (type == PNG_STRUCT_INFO) - size = sizeof(png_info); + size = png_sizeof(png_info); else if (type == PNG_STRUCT_PNG) - size = sizeof(png_struct); + size = png_sizeof(png_struct); else return (NULL); #ifdef PNG_USER_MEM_SUPPORTED - if(malloc_fn != NULL) + if (malloc_fn != NULL) { png_struct dummy_struct; png_structp png_ptr = &dummy_struct; @@ -345,17 +366,16 @@ png_create_struct_2(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr) #endif /* PNG_USER_MEM_SUPPORTED */ #if defined(__TURBOC__) && !defined(__FLAT__) - if ((struct_ptr = (png_voidp)farmalloc(size)) != NULL) + struct_ptr = (png_voidp)farmalloc(size); #else # if defined(_MSC_VER) && defined(MAXSEG_64K) - if ((struct_ptr = (png_voidp)halloc(size,1)) != NULL) + struct_ptr = (png_voidp)halloc(size, 1); # else - if ((struct_ptr = (png_voidp)malloc(size)) != NULL) + struct_ptr = (png_voidp)malloc(size); # endif #endif - { + if (struct_ptr != NULL) png_memset(struct_ptr, 0, size); - } return (struct_ptr); } @@ -378,7 +398,7 @@ png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, if (struct_ptr != NULL) { #ifdef PNG_USER_MEM_SUPPORTED - if(free_fn != NULL) + if (free_fn != NULL) { png_struct dummy_struct; png_structp png_ptr = &dummy_struct; @@ -410,19 +430,17 @@ png_malloc(png_structp png_ptr, png_uint_32 size) { png_voidp ret; +#ifdef PNG_USER_MEM_SUPPORTED if (png_ptr == NULL || size == 0) return (NULL); -#ifdef PNG_USER_MEM_SUPPORTED - if(png_ptr->malloc_fn != NULL) - { + if (png_ptr->malloc_fn != NULL) ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - png_error(png_ptr, "Out of Memory!"); - return (ret); - } else - return (png_malloc_default(png_ptr, size)); + ret = (png_malloc_default(png_ptr, size)); + if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) + png_error(png_ptr, "Out of Memory!"); + return (ret); } png_voidp PNGAPI @@ -431,28 +449,45 @@ png_malloc_default(png_structp png_ptr, png_uint_32 size) png_voidp ret; #endif /* PNG_USER_MEM_SUPPORTED */ + if (png_ptr == NULL || size == 0) + return (NULL); + #ifdef PNG_MAX_MALLOC_64K if (size > (png_uint_32)65536L) { - if(png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) +#ifndef PNG_USER_MEM_SUPPORTED + if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Cannot Allocate > 64K"); else +#endif return NULL; } #endif + /* Check for overflow */ #if defined(__TURBOC__) && !defined(__FLAT__) + if (size != (unsigned long)size) + ret = NULL; + else ret = farmalloc(size); #else # if defined(_MSC_VER) && defined(MAXSEG_64K) + if (size != (unsigned long)size) + ret = NULL; + else ret = halloc(size, 1); # else + if (size != (size_t)size) + ret = NULL; + else ret = malloc((size_t)size); # endif #endif +#ifndef PNG_USER_MEM_SUPPORTED if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) png_error(png_ptr, "Out of Memory"); +#endif return (ret); } @@ -498,15 +533,18 @@ png_free_default(png_structp png_ptr, png_voidp ptr) # define png_malloc_warn png_malloc #else /* This function was added at libpng version 1.2.3. The png_malloc_warn() - * function will issue a png_warning and return NULL instead of issuing a - * png_error, if it fails to allocate the requested memory. + * function will set up png_malloc() to issue a png_warning and return NULL + * instead of issuing a png_error, if it fails to allocate the requested + * memory. */ png_voidp PNGAPI png_malloc_warn(png_structp png_ptr, png_uint_32 size) { png_voidp ptr; - png_uint_32 save_flags=png_ptr->flags; + png_uint_32 save_flags; + if (png_ptr == NULL) return (NULL); + save_flags = png_ptr->flags; png_ptr->flags|=PNG_FLAG_MALLOC_NULL_MEM_OK; ptr = (png_voidp)png_malloc((png_structp)png_ptr, size); png_ptr->flags=save_flags; @@ -522,7 +560,7 @@ png_memcpy_check (png_structp png_ptr, png_voidp s1, png_voidp s2, size = (png_size_t)length; if ((png_uint_32)size != length) - png_error(png_ptr,"Overflow in png_memcpy_check."); + png_error(png_ptr, "Overflow in png_memcpy_check."); return(png_memcpy (s1, s2, size)); } @@ -535,7 +573,7 @@ png_memset_check (png_structp png_ptr, png_voidp s1, int value, size = (png_size_t)length; if ((png_uint_32)size != length) - png_error(png_ptr,"Overflow in png_memset_check."); + png_error(png_ptr, "Overflow in png_memset_check."); return (png_memset (s1, value, size)); @@ -549,9 +587,12 @@ void PNGAPI png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr malloc_fn, png_free_ptr free_fn) { - png_ptr->mem_ptr = mem_ptr; - png_ptr->malloc_fn = malloc_fn; - png_ptr->free_fn = free_fn; + if (png_ptr != NULL) + { + png_ptr->mem_ptr = mem_ptr; + png_ptr->malloc_fn = malloc_fn; + png_ptr->free_fn = free_fn; + } } /* This function returns a pointer to the mem_ptr associated with the user @@ -561,6 +602,8 @@ png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr png_voidp PNGAPI png_get_mem_ptr(png_structp png_ptr) { + if (png_ptr == NULL) return (NULL); return ((png_voidp)png_ptr->mem_ptr); } #endif /* PNG_USER_MEM_SUPPORTED */ +#endif /* PNG_READ_SUPPORTED || PNG_WRITE_SUPPORTED */