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Imported from libpng-0.99a.tar

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This commit is contained in:
Glenn Randers-Pehrson
1998-01-31 20:07:59 -06:00
parent 46f61e2398
commit b212002101
21 changed files with 92 additions and 88 deletions
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20
png.c
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@@ -1,12 +1,12 @@
/* png.c - location for general purpose libpng functions
*
* libpng 0.99
* libpng 0.99a
* For conditions of distribution and use, see copyright notice in png.h
* Copyright (c) 1995, 1996 Guy Eric Schalnat, Group 42, Inc.
* Copyright (c) 1996, 1997 Andreas Dilger
* Copyright (c) 1998, Glenn Randers-Pehrson
* January 30, 1998
* January 31, 1998
*/
#define PNG_INTERNAL
@@ -16,7 +16,7 @@
/* Version information for C files. This had better match the version
* string defined in png.h.
*/
char png_libpng_ver[5] = "0.99";
char png_libpng_ver[6] = "0.99";
/* Place to hold the signature string for a PNG file. */
png_byte FARDATA png_sig[8] = {137, 80, 78, 71, 13, 10, 26, 10};
@@ -103,15 +103,15 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
if (num_to_check > 8)
num_to_check = 8;
else if (num_to_check < 1)
return 0;
return (0);
if (start > 7)
return 0;
return (0);
if (start + num_to_check > 8)
num_to_check = 8 - start;
return (png_memcmp(&sig[start], &png_sig[start], num_to_check));
return ((int)(png_memcmp(&sig[start], &png_sig[start], num_to_check)));
}
/* (Obsolete) function to check signature bytes. It does not allow one
@@ -121,7 +121,7 @@ png_sig_cmp(png_bytep sig, png_size_t start, png_size_t num_to_check)
int
png_check_sig(png_bytep sig, int num)
{
return !png_sig_cmp(sig, (png_size_t)0, (png_size_t)num);
return ((int)!png_sig_cmp(sig, (png_size_t)0, (png_size_t)num));
}
/* Function to allocate memory for zlib. */
@@ -143,7 +143,7 @@ png_zalloc(voidpf png_ptr, uInt items, uInt size)
{
png_memset(ptr, 0, (png_size_t)num_bytes);
}
return (voidpf)(ptr);
return ((voidpf)ptr);
}
/* function to free memory for zlib */
@@ -205,7 +205,7 @@ png_create_info_struct(png_structp png_ptr)
png_info_init(info_ptr);
}
return info_ptr;
return (info_ptr);
}
/* This function frees the memory associated with a single info struct.
@@ -286,7 +286,7 @@ png_info_destroy(png_structp png_ptr, png_infop info_ptr)
png_voidp
png_get_io_ptr(png_structp png_ptr)
{
return png_ptr->io_ptr;
return (png_ptr->io_ptr);
}
#if !defined(PNG_NO_STDIO)