diff options
Diffstat (limited to 'plugingui/png/pngmem.c')
| -rw-r--r-- | plugingui/png/pngmem.c | 667 |
1 files changed, 0 insertions, 667 deletions
diff --git a/plugingui/png/pngmem.c b/plugingui/png/pngmem.c deleted file mode 100644 index ca258d0..0000000 --- a/plugingui/png/pngmem.c +++ /dev/null @@ -1,667 +0,0 @@ - -/* pngmem.c - stub functions for memory allocation - * - * Last changed in libpng 1.5.13 [September 27, 2012] - * Copyright (c) 1998-2012 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.) - * - * This code is released under the libpng license. - * For conditions of distribution and use, see the disclaimer - * and license in png.h - * - * This file provides a location for all memory allocation. Users who - * need special memory handling are expected to supply replacement - * functions for png_malloc() and png_free(), and to use - * png_create_read_struct_2() and png_create_write_struct_2() to - * identify the replacement functions. - */ - -#include "pngpriv.h" - -#if defined(PNG_READ_SUPPORTED) || defined(PNG_WRITE_SUPPORTED) - -/* Borland DOS special memory handler */ -#if defined(__TURBOC__) && !defined(_Windows) && !defined(__FLAT__) -/* If you change this, be sure to change the one in png.h also */ - -/* Allocate memory for a png_struct. The malloc and memset can be replaced - by a single call to calloc() if this is thought to improve performance. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct,(int type),PNG_ALLOCATED) -{ -# ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL, NULL)); -} - -/* Alternate version of png_create_struct, for use with user-defined malloc. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), - PNG_ALLOCATED) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = png_sizeof(png_info); - - else if (type == PNG_STRUCT_PNG) - size = png_sizeof(png_struct); - - else - return (png_get_copyright(NULL)); - -# ifdef PNG_USER_MEM_SUPPORTED - if (malloc_fn != NULL) - { - png_struct dummy_struct; - png_memset(&dummy_struct, 0, sizeof dummy_struct); - dummy_struct.mem_ptr=mem_ptr; - struct_ptr = (*(malloc_fn))(&dummy_struct, (png_alloc_size_t)size); - } - - else -# endif /* PNG_USER_MEM_SUPPORTED */ - struct_ptr = (png_voidp)farmalloc(size); - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) -{ -# ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, NULL, NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, - png_voidp mem_ptr) -{ -# endif - if (struct_ptr != NULL) - { -# ifdef PNG_USER_MEM_SUPPORTED - if (free_fn != NULL) - { - png_struct dummy_struct; - png_memset(&dummy_struct, 0, sizeof dummy_struct); - dummy_struct.mem_ptr=mem_ptr; - (*(free_fn))(&dummy_struct, struct_ptr); - return; - } - -# endif /* PNG_USER_MEM_SUPPORTED */ - farfree (struct_ptr); - } -} - -/* Allocate memory. For reasonable files, size should never exceed - * 64K. However, zlib may allocate more then 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does - * need to allocate exactly 64K, so whatever you call here must - * have the ability to do that. - * - * Borland seems to have a problem in DOS mode for exactly 64K. - * It gives you a segment with an offset of 8 (perhaps to store its - * memory stuff). zlib doesn't like this at all, so we have to - * detect and deal with it. This code should not be needed in - * Windows or OS/2 modes, and only in 16 bit mode. This code has - * been updated by Alexander Lehmann for version 0.89 to waste less - * memory. - * - * Note that we can't use png_size_t for the "size" declaration, - * since on some systems a png_size_t is a 16-bit quantity, and as a - * result, we would be truncating potentially larger memory requests - * (which should cause a fatal error) and introducing major problems. - */ -PNG_FUNCTION(png_voidp,PNGAPI -png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - - ret = (png_malloc(png_ptr, size)); - - if (ret != NULL) - png_memset(ret,0,(png_size_t)size); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - - if (png_ptr == NULL || size == 0) - return (NULL); - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->malloc_fn != NULL) - ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, size)); - - else - ret = (png_malloc_default(png_ptr, size)); - - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - dg_png_error(png_ptr, "Out of memory"); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - 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_warning(png_ptr, "Cannot Allocate > 64K"); - ret = NULL; - } - - else -# endif - - if (size != (size_t)size) - ret = NULL; - - else if (size == (png_uint_32)65536L) - { - if (png_ptr->offset_table == NULL) - { - /* Try to see if we need to do any of this fancy stuff */ - ret = farmalloc(size); - if (ret == NULL || ((png_size_t)ret & 0xffff)) - { - int num_blocks; - png_uint_32 total_size; - png_bytep table; - int i, mem_level, window_bits; - png_byte huge * hptr; - int window_bits - - if (ret != NULL) - { - farfree(ret); - ret = NULL; - } - - window_bits = - png_ptr->zlib_window_bits >= png_ptr->zlib_text_window_bits ? - png_ptr->zlib_window_bits : png_ptr->zlib_text_window_bits; - - if (window_bits > 14) - num_blocks = (int)(1 << (window_bits - 14)); - - else - num_blocks = 1; - - mem_level = - png_ptr->zlib_mem_level >= png_ptr->zlib_text_mem_level ? - png_ptr->zlib_mem_level : png_ptr->zlib_text_mem_level; - - if (mem_level >= 7) - num_blocks += (int)(1 << (mem_level - 7)); - - else - num_blocks++; - - total_size = ((png_uint_32)65536L) * (png_uint_32)num_blocks+16; - - table = farmalloc(total_size); - - if (table == NULL) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - dg_png_error(png_ptr, "Out Of Memory"); /* Note "O", "M" */ - - else - png_warning(png_ptr, "Out Of Memory"); -# endif - return (NULL); - } - - if ((png_size_t)table & 0xfff0) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - dg_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 * - png_sizeof(png_bytep)); - - if (png_ptr->offset_table_ptr == NULL) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - dg_png_error(png_ptr, "Out Of memory"); /* Note "O", "m" */ - - else - png_warning(png_ptr, "Out Of memory"); -# endif - return (NULL); - } - - hptr = (png_byte huge *)table; - if ((png_size_t)hptr & 0xf) - { - hptr = (png_byte huge *)((long)(hptr) & 0xfffffff0L); - hptr = hptr + 16L; /* "hptr += 16L" fails on Turbo C++ 3.0 */ - } - - for (i = 0; i < num_blocks; i++) - { - png_ptr->offset_table_ptr[i] = (png_bytep)hptr; - hptr = hptr + (png_uint_32)65536L; /* "+=" fails on TC++3.0 */ - } - - png_ptr->offset_table_number = num_blocks; - png_ptr->offset_table_count = 0; - png_ptr->offset_table_count_free = 0; - } - } - - if (png_ptr->offset_table_count >= png_ptr->offset_table_number) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - dg_png_error(png_ptr, "Out of Memory"); /* Note "O" and "M" */ - - else - png_warning(png_ptr, "Out of Memory"); -# endif - return (NULL); - } - - ret = png_ptr->offset_table_ptr[png_ptr->offset_table_count++]; - } - - else - ret = farmalloc(size); - -# ifndef PNG_USER_MEM_SUPPORTED - if (ret == NULL) - { - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - dg_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); -} - -/* 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) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } - - else - png_free_default(png_ptr, ptr); -} - -void PNGAPI -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; - - for (i = 0; i < png_ptr->offset_table_count; i++) - { - if (ptr == png_ptr->offset_table_ptr[i]) - { - ptr = NULL; - png_ptr->offset_table_count_free++; - break; - } - } - if (png_ptr->offset_table_count_free == png_ptr->offset_table_count) - { - farfree(png_ptr->offset_table); - farfree(png_ptr->offset_table_ptr); - png_ptr->offset_table = NULL; - png_ptr->offset_table_ptr = NULL; - } - } - - if (ptr != NULL) - farfree(ptr); -} - -#else /* Not the Borland DOS special memory handler */ - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct,(int type),PNG_ALLOCATED) -{ -# ifdef PNG_USER_MEM_SUPPORTED - return (png_create_struct_2(type, NULL, NULL)); -} - -/* Allocate memory for a png_struct or a png_info. The malloc and - memset can be replaced by a single call to calloc() if this is thought - to improve performance noticably. */ -PNG_FUNCTION(png_voidp /* PRIVATE */, -png_create_struct_2,(int type, png_malloc_ptr malloc_fn, png_voidp mem_ptr), - PNG_ALLOCATED) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - png_size_t size; - png_voidp struct_ptr; - - if (type == PNG_STRUCT_INFO) - size = png_sizeof(png_info); - - else if (type == PNG_STRUCT_PNG) - size = png_sizeof(png_struct); - - else - return (NULL); - -# ifdef PNG_USER_MEM_SUPPORTED - if (malloc_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - png_ptr->mem_ptr=mem_ptr; - struct_ptr = (*(malloc_fn))(png_ptr, size); - - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); - } -# endif /* PNG_USER_MEM_SUPPORTED */ - -# if defined(__TURBOC__) && !defined(__FLAT__) - struct_ptr = (png_voidp)farmalloc(size); -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - struct_ptr = (png_voidp)halloc(size, 1); -# else - struct_ptr = (png_voidp)malloc(size); -# endif -# endif - - if (struct_ptr != NULL) - png_memset(struct_ptr, 0, size); - - return (struct_ptr); -} - - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct(png_voidp struct_ptr) -{ -# ifdef PNG_USER_MEM_SUPPORTED - png_destroy_struct_2(struct_ptr, NULL, NULL); -} - -/* Free memory allocated by a png_create_struct() call */ -void /* PRIVATE */ -png_destroy_struct_2(png_voidp struct_ptr, png_free_ptr free_fn, - png_voidp mem_ptr) -{ -# endif /* PNG_USER_MEM_SUPPORTED */ - if (struct_ptr != NULL) - { -# ifdef PNG_USER_MEM_SUPPORTED - if (free_fn != NULL) - { - png_struct dummy_struct; - png_structp png_ptr = &dummy_struct; - png_ptr->mem_ptr=mem_ptr; - (*(free_fn))(png_ptr, struct_ptr); - return; - } -# endif /* PNG_USER_MEM_SUPPORTED */ -# if defined(__TURBOC__) && !defined(__FLAT__) - farfree(struct_ptr); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(struct_ptr); - -# else - free(struct_ptr); - -# endif -# endif - } -} - -/* Allocate memory. For reasonable files, size should never exceed - * 64K. However, zlib may allocate more then 64K if you don't tell - * it not to. See zconf.h and png.h for more information. zlib does - * need to allocate exactly 64K, so whatever you call here must - * have the ability to do that. - */ - -PNG_FUNCTION(png_voidp,PNGAPI -png_calloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - - ret = (png_malloc(png_ptr, size)); - - if (ret != NULL) - png_memset(ret,0,(png_size_t)size); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ret; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr == NULL || size == 0) - return (NULL); - - if (png_ptr->malloc_fn != NULL) - ret = ((png_voidp)(*(png_ptr->malloc_fn))(png_ptr, (png_size_t)size)); - - else - ret = (png_malloc_default(png_ptr, size)); - - if (ret == NULL && (png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - dg_png_error(png_ptr, "Out of Memory"); - - return (ret); -} - -PNG_FUNCTION(png_voidp,PNGAPI -png_malloc_default,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - 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) - { -# ifndef PNG_USER_MEM_SUPPORTED - if ((png_ptr->flags&PNG_FLAG_MALLOC_NULL_MEM_OK) == 0) - dg_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) - dg_png_error(png_ptr, "Out of Memory"); -# endif - - return (ret); -} - -/* Free a pointer allocated by png_malloc(). If ptr is NULL, return - * without taking any action. - */ -void PNGAPI -png_free(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -# ifdef PNG_USER_MEM_SUPPORTED - if (png_ptr->free_fn != NULL) - { - (*(png_ptr->free_fn))(png_ptr, ptr); - return; - } - - else - png_free_default(png_ptr, ptr); -} - -void PNGAPI -png_free_default(png_structp png_ptr, png_voidp ptr) -{ - if (png_ptr == NULL || ptr == NULL) - return; - -# endif /* PNG_USER_MEM_SUPPORTED */ - -# if defined(__TURBOC__) && !defined(__FLAT__) - farfree(ptr); - -# else -# if defined(_MSC_VER) && defined(MAXSEG_64K) - hfree(ptr); - -# else - free(ptr); - -# endif -# endif -} -#endif /* Not Borland DOS special memory handler */ - -/* This function was added at libpng version 1.2.3. The png_malloc_warn() - * 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_FUNCTION(png_voidp,PNGAPI -png_malloc_warn,(png_structp png_ptr, png_alloc_size_t size),PNG_ALLOCATED) -{ - png_voidp ptr; - 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; - return(ptr); -} - - -#ifdef PNG_USER_MEM_SUPPORTED -/* This function is called when the application wants to use another method - * of allocating and freeing memory. - */ -void PNGAPI -png_set_mem_fn(png_structp png_ptr, png_voidp mem_ptr, png_malloc_ptr - malloc_fn, png_free_ptr 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 - * functions. The application should free any memory associated with this - * pointer before png_write_destroy and png_read_destroy are called. - */ -png_voidp PNGAPI -png_get_mem_ptr(png_const_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 */ |