Avoid library header include in crc32.c for Z_SOLO.

crc32.c was #including limits.h in order to find a four-byte integer type. It was doing this even if Z_SOLO were defined, violating the intent of Z_SOLO, which is to include no library headers and require no library functions. Now crc32.c obeys the intent of Z_SOLO, but with the downside that crc32() will be slower than when not compiled with Z_SOLO. This can be remedied manually by typedefing u4 to a known four-byte unsigned integer type, and #defining BYFOUR in crc32.c.
SkyN9ne · Feb 2, 2012 · f9e4edc · f9e4edc
1 parent 55b8b5f
commit f9e4edc
Showing 1 changed file with 3 additions and 0 deletions.
diff --git a/crc32.c b/crc32.c
@@ -33,6 +33,9 @@
 #define local static
 
 /* Find a four-byte integer type for crc32_little() and crc32_big(). */
+#ifdef Z_SOLO
+#  define NOBYFOUR
+#endif
 #ifndef NOBYFOUR
 #  ifdef STDC           /* need ANSI C limits.h to determine sizes */
 #    include <limits.h>