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[devel]Made all API functions that have const arguments and constant string

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literal pointers declare them (John Bowler).
Many APIs did not change their arguments but were not declared using
PNG_CONST.  This change corrects this.  In a few cases APIs that return
constant string literal pointers have also been changed to declare this.
Unlike the argument change this may require app changes; however the
results could never be written to (the app would crash on some platforms
where strings are not writable), so this seems advisable.
This commit is contained in:
Glenn Randers-Pehrson
2010-08-18 07:25:46 -05:00
parent 21b4b339d9
commit e600c51355
17 changed files with 406 additions and 355 deletions
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11
pngwrite.c
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@@ -412,7 +412,7 @@ png_write_end(png_structp png_ptr, png_infop info_ptr)
#ifdef PNG_CONVERT_tIME_SUPPORTED
/* "tm" structure is not supported on WindowsCE */
void PNGAPI
png_convert_from_struct_tm(png_timep ptime, struct tm FAR * ttime)
png_convert_from_struct_tm(png_timep ptime, PNG_CONST struct tm FAR * ttime)
{
png_debug(1, "in png_convert_from_struct_tm");
@@ -643,7 +643,7 @@ png_write_image(png_structp png_ptr, png_bytepp image)
/* Called by user to write a row of image data */
void PNGAPI
png_write_row(png_structp png_ptr, png_bytep row)
png_write_row(png_structp png_ptr, png_const_bytep row)
{
if (png_ptr == NULL)
return;
@@ -1284,7 +1284,8 @@ png_init_filter_heuristics(png_structp png_ptr, int heuristic_method,
#ifdef PNG_FLOATING_POINT_SUPPORTED
void PNGAPI
png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
int num_weights, png_doublep filter_weights, png_doublep filter_costs)
int num_weights, png_const_doublep filter_weights,
png_const_doublep filter_costs)
{
png_debug(1, "in png_set_filter_heuristics");
@@ -1338,8 +1339,8 @@ png_set_filter_heuristics(png_structp png_ptr, int heuristic_method,
#ifdef PNG_FIXED_POINT_SUPPORTED
void PNGAPI
png_set_filter_heuristics_fixed(png_structp png_ptr, int heuristic_method,
int num_weights, png_fixed_point_p filter_weights,
png_fixed_point_p filter_costs)
int num_weights, png_const_fixed_point_p filter_weights,
png_const_fixed_point_p filter_costs)
{
png_debug(1, "in png_set_filter_heuristics_fixed");