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Avoid library header include in crc32.c for Z_SOLO.

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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.
This commit is contained in:
Mark Adler 2012-02-01 23:47:47 -08:00
parent 55b8b5fec1
commit f9e4edc996
1 changed files with 3 additions and 0 deletions
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crc32.c
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@ -33,6 +33,9 @@
#define local static #define local static
/* Find a four-byte integer type for crc32_little() and crc32_big(). */ /* Find a four-byte integer type for crc32_little() and crc32_big(). */
#ifdef Z_SOLO
# define NOBYFOUR
#endif
#ifndef NOBYFOUR #ifndef NOBYFOUR
# ifdef STDC /* need ANSI C limits.h to determine sizes */ # ifdef STDC /* need ANSI C limits.h to determine sizes */
# include <limits.h> # include <limits.h>