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authorJuan J. Martinez <jjm@usebox.net>2020-12-30 19:07:31 +0000
committerJuan J. Martinez <jjm@usebox.net>2020-12-30 19:23:41 +0000
commit2682bc5d1d864341aaeb42a449db73c3ecd16d70 (patch)
tree9116764364b4ee0ce7f6037305077807b57776de /tools/hex2bin-2.0/src/libcrc.c
downloadubox-msx-lib-2682bc5d1d864341aaeb42a449db73c3ecd16d70.tar.gz
ubox-msx-lib-2682bc5d1d864341aaeb42a449db73c3ecd16d70.zip
Initial import1.0
Diffstat (limited to 'tools/hex2bin-2.0/src/libcrc.c')
-rw-r--r--tools/hex2bin-2.0/src/libcrc.c204
1 files changed, 204 insertions, 0 deletions
diff --git a/tools/hex2bin-2.0/src/libcrc.c b/tools/hex2bin-2.0/src/libcrc.c
new file mode 100644
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+++ b/tools/hex2bin-2.0/src/libcrc.c
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+/*********************************************************************
+ * *
+ * Library : lib_crc *
+ * File : lib_crc.c *
+ * Author : Lammert Bies 1999-2008 *
+ * E-mail : info@lammertbies.nl *
+ * Language : ANSI C *
+ * *
+ * *
+ * Description *
+ * =========== *
+ * *
+ * The file lib_crc.c contains the private and public func- *
+ * tions used for the calculation of CRC-16, CRC-CCITT and *
+ * CRC-32 cyclic redundancy values. *
+ * *
+ * *
+ * Dependencies *
+ * ============ *
+ * *
+ * libcrc.h CRC definitions and prototypes *
+ * *
+ ********************************************************************/
+#include <stdint.h>
+
+#ifndef G_GUINT64_CONSTANT
+#define G_GUINT64_CONSTANT(val) (val##UL)
+#endif
+
+void *crc_table;
+
+/* private */
+
+void init_crc8_normal_tab(uint8_t polynom)
+{
+ int i, j;
+ uint8_t crc;
+ uint8_t *p;
+
+ p = (uint8_t *) crc_table;
+
+ for (i=0; i<256; i++)
+ {
+ crc = (uint8_t) i;
+
+ for (j=0; j<8; j++)
+ {
+ if (crc & 0x80) crc = (crc << 1) ^ polynom;
+ else crc <<= 1;
+ }
+ *p++ = crc;
+ }
+}
+
+void init_crc8_reflected_tab(uint8_t polynom)
+{
+ int i, j;
+ uint8_t crc;
+ uint8_t *p;
+
+ p = (uint8_t *) crc_table;
+
+ for (i=0; i<256; i++)
+ {
+ crc = (uint8_t) i;
+
+ for (j=0; j<8; j++)
+ {
+ if (crc & 0x01) crc = (crc >> 1) ^ polynom;
+ else crc >>= 1;
+ }
+ *p++ = crc;
+ }
+}
+
+/* Common routines for calculations */
+void init_crc16_normal_tab(uint16_t polynom)
+{
+ int i, j;
+ uint16_t crc;
+ uint16_t *p;
+
+ p = (uint16_t *) crc_table;
+
+ for (i=0; i<256; i++)
+ {
+ crc = ((uint16_t) i) << 8;
+
+ for (j=0; j<8; j++)
+ {
+ if ( crc & 0x8000 ) crc = ( crc << 1 ) ^ polynom;
+ else crc <<= 1;
+ }
+ *p++ = crc;
+ }
+}
+
+void init_crc16_reflected_tab(uint16_t polynom)
+{
+ int i, j;
+ uint16_t crc;
+ uint16_t *p;
+
+ p = (uint16_t *) crc_table;
+
+ for (i=0; i<256; i++)
+ {
+ crc = (uint16_t) i;
+
+ for (j=0; j<8; j++)
+ {
+ if ( crc & 0x0001 ) crc = ( crc >> 1 ) ^ polynom;
+ else crc >>= 1;
+ }
+ *p++ = crc;
+ }
+}
+
+void init_crc32_normal_tab(uint32_t polynom)
+{
+ int i, j;
+ uint32_t crc;
+ uint32_t *p;
+
+ p = (uint32_t *) crc_table;
+
+ for (i=0; i<256; i++)
+ {
+ crc = ((uint32_t) i) << 24;
+
+ for (j=0; j<8; j++)
+ {
+ if ( crc & 0x80000000L ) crc = ( crc << 1 ) ^ polynom;
+ else crc <<= 1;
+ }
+ *p++ = crc;
+ }
+}
+
+void init_crc32_reflected_tab(uint32_t polynom)
+{
+ int i, j;
+ uint32_t crc;
+ uint32_t *p;
+
+ p = (uint32_t *) crc_table;
+
+ for (i=0; i<256; i++)
+ {
+ crc = (uint32_t) i;
+
+ for (j=0; j<8; j++)
+ {
+ if ( crc & 0x00000001L ) crc = ( crc >> 1 ) ^ polynom;
+ else crc >>= 1;
+ }
+ *p++ = crc;
+ }
+}
+
+/* Common routines for calculations */
+
+uint8_t update_crc8(uint8_t crc, uint8_t c)
+{
+ return (((uint8_t *) crc_table)[crc ^ c]);
+}
+
+uint16_t update_crc16_normal(uint16_t crc, char c )
+{
+ uint16_t short_c;
+
+ short_c = 0x00ff & (uint16_t) c;
+
+ /* Normal form */
+ return (crc << 8) ^ ((uint16_t *) crc_table)[(crc >> 8) ^ short_c];
+}
+
+uint16_t update_crc16_reflected(uint16_t crc, char c )
+{
+ uint16_t short_c;
+
+ short_c = 0x00ff & (uint16_t) c;
+
+ /* Reflected form */
+ return (crc >> 8) ^ ((uint16_t *) crc_table)[(crc ^ short_c) & 0xff];
+}
+
+uint32_t update_crc32_normal(uint32_t crc, char c )
+{
+ uint32_t long_c;
+
+ long_c = 0x000000ffL & (uint32_t) c;
+
+ return (crc << 8) ^ ((uint32_t *) crc_table)[((crc >> 24) ^ long_c) & 0xff];
+}
+
+uint32_t update_crc32_reflected(uint32_t crc, char c )
+{
+ uint32_t long_c;
+
+ long_c = 0x000000ffL & (uint32_t) c;
+
+ return (crc >> 8) ^ ((uint32_t *) crc_table)[(crc ^ long_c) & 0xff];
+}