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fix: Typo in a preprocessor directive

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This is a regression of commit 2519a03418af2108d3bd8c269ba01ab72ae240ef
"refactor: Clean up the checking of chunk lengths and allocation limits"

Compilation would break under the "right" non-default configuration.
(Oopsie!)

Also clean up comments in the surrounding code.

Reported-by: chris0e3 <chris0e3@gmail.com>
Signed-off-by: Cosmin Truta <ctruta@gmail.com>
This commit is contained in:
Cosmin Truta 2025-01-30 23:07:55 +02:00
parent 2519a03418
commit 8c7ed2e3b2
1 changed files with 3 additions and 8 deletions
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11
png.c
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@ -268,27 +268,22 @@ png_create_png_struct,(png_const_charp user_png_ver, png_voidp error_ptr,
*/
memset(&create_struct, 0, (sizeof create_struct));
/* Added at libpng-1.2.6 */
# ifdef PNG_USER_LIMITS_SUPPORTED
create_struct.user_width_max = PNG_USER_WIDTH_MAX;
create_struct.user_height_max = PNG_USER_HEIGHT_MAX;
# ifdef PNG_USER_CHUNK_CACHE_MAX
/* Added at libpng-1.2.43 and 1.4.0 */
create_struct.user_chunk_cache_max = PNG_USER_CHUNK_CACHE_MAX;
# endif
/* Added at libpng-1.2.43 and 1.4.1, required only for read but exists
* in png_struct regardless.
*/
# if PNG_USER_CHUNK_MALLOC_MAX > 0 /* default to compile-time limit */
create_struct.user_chunk_malloc_max = PNG_USER_CHUNK_MALLOC_MAX;
/* No compile time limit so initialize to the system limit: */
# elif (defined PNG_MAX_MALLOC_64K/* legacy system limit */
/* No compile-time limit, so initialize to the system limit: */
# elif defined PNG_MAX_MALLOC_64K /* legacy system limit */
create_struct.user_chunk_malloc_max = 65536U;
# else /* modern system limit SIZE_MAX (C99) */
# else /* modern system limit SIZE_MAX (C99) */
create_struct.user_chunk_malloc_max = PNG_SIZE_MAX;
# endif
# endif