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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
pngtrans.c
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@@ -79,7 +79,7 @@ png_set_packswap(png_structp png_ptr)
#if defined(PNG_READ_SHIFT_SUPPORTED) || defined(PNG_WRITE_SHIFT_SUPPORTED)
void PNGAPI
png_set_shift(png_structp png_ptr, png_color_8p true_bits)
png_set_shift(png_structp png_ptr, png_const_color_8p true_bits)
{
png_debug(1, "in png_set_shift");
@@ -395,18 +395,19 @@ png_do_packswap(png_row_infop row_info, png_bytep row)
if (row_info->bit_depth < 8)
{
png_bytep rp, end, table;
png_bytep rp;
png_const_bytep end, table;
end = row + row_info->rowbytes;
if (row_info->bit_depth == 1)
table = (png_bytep)onebppswaptable;
table = onebppswaptable;
else if (row_info->bit_depth == 2)
table = (png_bytep)twobppswaptable;
table = twobppswaptable;
else if (row_info->bit_depth == 4)
table = (png_bytep)fourbppswaptable;
table = fourbppswaptable;
else
return;