From 906520ee2cece20c875835697db08cd5e29b919b Mon Sep 17 00:00:00 2001 From: Timo Sirainen Date: Sun, 12 Oct 2008 14:40:08 +0300 Subject: [PATCH] Added crc32_[str_]more(). --HG-- branch : HEAD --- src/lib/crc32.c | 12 ++++++++++-- src/lib/crc32.h | 3 +++ 2 files changed, 13 insertions(+), 2 deletions(-) diff --git a/src/lib/crc32.c b/src/lib/crc32.c index 4a8cdbe143..29a5bb02ca 100644 --- a/src/lib/crc32.c +++ b/src/lib/crc32.c @@ -59,9 +59,13 @@ static uint32_t crc32tab[256] = { }; uint32_t crc32_data(const void *data, size_t size) +{ + return crc32_data_more((uint32_t)-1, data, size); +} + +uint32_t crc32_data_more(uint32_t crc, const void *data, size_t size) { const uint8_t *p = data, *end = p + size; - uint32_t crc = (uint32_t)-1; for (; p != end; p++) crc = (crc >> 8) ^ crc32tab[((crc ^ *p) & 0xff)]; @@ -69,9 +73,13 @@ uint32_t crc32_data(const void *data, size_t size) } uint32_t crc32_str(const char *str) +{ + return crc32_str_more((uint32_t)-1, str); +} + +uint32_t crc32_str_more(uint32_t crc, const char *str) { const uint8_t *p = (const uint8_t *)str; - uint32_t crc = (uint32_t)-1; for (; *p != '\0'; p++) crc = (crc >> 8) ^ crc32tab[((crc ^ *p) & 0xff)]; diff --git a/src/lib/crc32.h b/src/lib/crc32.h index 5bcfe01c62..7892212b03 100644 --- a/src/lib/crc32.h +++ b/src/lib/crc32.h @@ -4,4 +4,7 @@ uint32_t crc32_data(const void *data, size_t size) ATTR_PURE; uint32_t crc32_str(const char *str) ATTR_PURE; +uint32_t crc32_data_more(uint32_t crc, const void *data, size_t size) ATTR_PURE; +uint32_t crc32_str_more(uint32_t crc, const char *str) ATTR_PURE; + #endif -- 2.47.3