diff options
Diffstat (limited to 'lib')
| -rw-r--r-- | lib/Makefile | 6 | ||||
| -rw-r--r-- | lib/libcrc32.c (renamed from lib/crc32.c) | 11 | ||||
| -rw-r--r-- | lib/libfec.c (renamed from lib/fec.c) | 0 |
3 files changed, 13 insertions, 4 deletions
diff --git a/lib/Makefile b/lib/Makefile index 82194e4..621ed63 100644 --- a/lib/Makefile +++ b/lib/Makefile @@ -6,13 +6,13 @@ SUBDIRS = # CFLAGS += -Werror CPPFLAGS += -I../include -LIBS = libmtd -TARGETS = libmtd.a +LIBS = libmtd libcrc32 +TARGETS = libmtd.a libcrc32.a include ../common.mk $(BUILDDIR)/libmtd.a: $(addprefix $(BUILDDIR)/,\ - libmtd.o libmtd_legacy.o crc32.o fec.o) + libmtd.o libmtd_legacy.o libcrc32.o libfec.o) clean:: rm -f $(addsuffix .a, $(LIBS)) diff --git a/lib/crc32.c b/lib/libcrc32.c index 6b1e50c..d556e91 100644 --- a/lib/crc32.c +++ b/lib/libcrc32.c @@ -39,7 +39,7 @@ #include <stdint.h> -const uint32_t crc32_table[256] = { +const static uint32_t crc32_table[256] = { 0x00000000L, 0x77073096L, 0xee0e612cL, 0x990951baL, 0x076dc419L, 0x706af48fL, 0xe963a535L, 0x9e6495a3L, 0x0edb8832L, 0x79dcb8a4L, 0xe0d5e91eL, 0x97d2d988L, 0x09b64c2bL, 0x7eb17cbdL, 0xe7b82d07L, @@ -93,3 +93,12 @@ const uint32_t crc32_table[256] = { 0x5d681b02L, 0x2a6f2b94L, 0xb40bbe37L, 0xc30c8ea1L, 0x5a05df1bL, 0x2d02ef8dL }; + +uint32_t crc32(uint32_t val, const void *ss, int len) +{ + const unsigned char *s = ss; + + while (--len >= 0) + val = crc32_table[(val ^ *s++) & 0xff] ^ (val >> 8); + return val; +} |