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[libpng16] Check for EOF in contrib/pngminus/pnm2png.c (Paul Stewart).

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Glenn Randers-Pehrson 2013-05-07 13:50:50 -05:00
parent ec89c54e42
commit 34df4eb5ad
3 changed files with 35 additions and 12 deletions
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1
ANNOUNCE
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@ -51,6 +51,7 @@ Version 1.6.3beta05 [May 7, 2013]
the windowBits setting in the zlib header.
Zlib-1.2.8 and earlier don't allow us to decrease the windowBits, so
undid the improvement in beta04.
Check for EOF in contrib/pngminus/pnm2png.c (Paul Stewart).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

1
CHANGES
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@ -4534,6 +4534,7 @@ Version 1.6.3beta05 [May 7, 2013]
the windowBits setting in the zlib header.
Zlib-1.2.8 and earlier don't allow us to decrease the windowBits, so
undid the improvement in beta04.
Check for EOF in contrib/pngminus/pnm2png.c (Paul Stewart).
Send comments/corrections/commendations to png-mng-implement at lists.sf.net
(subscription required; visit

45
contrib/pngminus/pnm2png.c
View File

@ -18,6 +18,7 @@
#include <mem.h>
#include <fcntl.h>
#endif
#include <zlib.h>
#ifndef BOOL
#define BOOL unsigned char
@ -197,6 +198,9 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
char height_token[16];
char maxval_token[16];
int color_type;
unsigned long ul_width, ul_alpha_width;
unsigned long ul_height, ul_alpha_height;
unsigned long ul_maxval;
png_uint_32 width, alpha_width;
png_uint_32 height, alpha_height;
png_uint_32 maxval;
@ -227,11 +231,15 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
raw = (type_token[1] == '5');
color_type = PNG_COLOR_TYPE_GRAY;
get_token(pnm_file, width_token);
sscanf (width_token, "%lu", &width);
sscanf (width_token, "%lu", &ul_width);
width = (png_uint_32) ul_width;
get_token(pnm_file, height_token);
sscanf (height_token, "%lu", &height);
sscanf (height_token, "%lu", &ul_height);
height = (png_uint_32) ul_height;
get_token(pnm_file, maxval_token);
sscanf (maxval_token, "%lu", &maxval);
sscanf (maxval_token, "%lu", &ul_maxval);
maxval = (png_uint_32) ul_maxval;
if (maxval <= 1)
bit_depth = 1;
else if (maxval <= 3)
@ -248,11 +256,14 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
raw = (type_token[1] == '6');
color_type = PNG_COLOR_TYPE_RGB;
get_token(pnm_file, width_token);
sscanf (width_token, "%lu", &width);
sscanf (width_token, "%lu", &ul_width);
width = (png_uint_32) ul_width;
get_token(pnm_file, height_token);
sscanf (height_token, "%lu", &height);
sscanf (height_token, "%lu", &ul_height);
height = (png_uint_32) ul_height;
get_token(pnm_file, maxval_token);
sscanf (maxval_token, "%lu", &maxval);
sscanf (maxval_token, "%lu", &ul_maxval);
maxval = (png_uint_32) ul_maxval;
if (maxval <= 1)
bit_depth = 1;
else if (maxval <= 3)
@ -287,15 +298,18 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
{
alpha_raw = (type_token[1] == '5');
get_token(alpha_file, width_token);
sscanf (width_token, "%lu", &alpha_width);
sscanf (width_token, "%lu", &ul_alpha_width);
alpha_width=(png_uint_32) ul_alpha_width;
if (alpha_width != width)
return FALSE;
get_token(alpha_file, height_token);
sscanf (height_token, "%lu", &alpha_height);
sscanf (height_token, "%lu", &ul_alpha_height);
alpha_height = (png_uint_32) ul_alpha_height;
if (alpha_height != height)
return FALSE;
get_token(alpha_file, maxval_token);
sscanf (maxval_token, "%lu", &maxval);
sscanf (maxval_token, "%lu", &ul_maxval);
maxval = (png_uint_32) ul_maxval;
if (maxval <= 1)
alpha_depth = 1;
else if (maxval <= 3)
@ -446,19 +460,24 @@ BOOL pnm2png (FILE *pnm_file, FILE *png_file, FILE *alpha_file, BOOL interlace,
void get_token(FILE *pnm_file, char *token)
{
int i = 0;
int ret;
/* remove white-space */
do
{
token[i] = (unsigned char) fgetc (pnm_file);
ret = fgetc(pnm_file);
if (ret == EOF) break;
token[i] = (unsigned char) ret;
}
while ((token[i] == '\n') || (token[i] == '\r') || (token[i] == ' '));
/* read string */
do
{
ret = fgetc(pnm_file);
if (ret == EOF) break;
i++;
token[i] = (unsigned char) fgetc (pnm_file);
token[i] = (unsigned char) ret;
}
while ((token[i] != '\n') && (token[i] != '\r') && (token[i] != ' '));
@ -510,6 +529,7 @@ png_uint_32 get_value (FILE *pnm_file, int depth)
{
static png_uint_32 mask = 0;
png_byte token[16];
unsigned long ul_ret_value;
png_uint_32 ret_value;
int i = 0;
@ -518,7 +538,8 @@ png_uint_32 get_value (FILE *pnm_file, int depth)
mask = (mask << 1) | 0x01;
get_token (pnm_file, (char *) token);
sscanf ((const char *) token, "%lu", &ret_value);
sscanf ((const char *) token, "%lu", &ul_ret_value);
ret_value = (png_uint_32) ul_ret_value;
ret_value &= mask;