diff options
Diffstat (limited to 'firmware/common/crc32.c')
-rw-r--r-- | firmware/common/crc32.c | 71 |
1 files changed, 65 insertions, 6 deletions
diff --git a/firmware/common/crc32.c b/firmware/common/crc32.c index 37e113f538..d4c7cfb795 100644 --- a/firmware/common/crc32.c +++ b/firmware/common/crc32.c | |||
@@ -19,8 +19,6 @@ | |||
19 | * | 19 | * |
20 | ****************************************************************************/ | 20 | ****************************************************************************/ |
21 | 21 | ||
22 | /* Code copied from firmware_flash plugin. */ | ||
23 | |||
24 | #include "crc32.h" | 22 | #include "crc32.h" |
25 | #include "config.h" | 23 | #include "config.h" |
26 | 24 | ||
@@ -118,17 +116,77 @@ uint32_t crc_32(const void *src, uint32_t len, uint32_t crc32) | |||
118 | } | 116 | } |
119 | #endif | 117 | #endif |
120 | 118 | ||
121 | /* crc_32r (derived from tinf crc32 which was taken from zlib) | 119 | /* Tool function to calculate a CRC32 (reversed polynomial) across some buffer */ |
122 | * CRC32 algorithm taken from the zlib source, which is | 120 | /* third argument is either the starting value or value from last piece */ |
123 | * Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler | 121 | /* speed optimized version */ |
124 | */ | 122 | #ifdef CRC32R_FAST |
123 | uint32_t crc_32r(const void *src, uint32_t len, uint32_t crc32) | ||
124 | { | ||
125 | const unsigned char *buf = (const unsigned char *)src; | ||
126 | |||
127 | /* crc_32r (derived from recent zlib crc32) | ||
128 | * CRC32 algorithm taken from the zlib source, which is | ||
129 | * Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler | ||
130 | */ | ||
131 | |||
132 | /* reversed polynomial from other crc32 function -- 0xEDB88320 */ | ||
133 | static const unsigned crc32_lookup[256] = { | ||
134 | 0x00000000, 0x77073096, 0xee0e612c, 0x990951ba, 0x076dc419, 0x706af48f, 0xe963a535, 0x9e6495a3, | ||
135 | 0x0edb8832, 0x79dcb8a4, 0xe0d5e91e, 0x97d2d988, 0x09b64c2b, 0x7eb17cbd, 0xe7b82d07, 0x90bf1d91, | ||
136 | 0x1db71064, 0x6ab020f2, 0xf3b97148, 0x84be41de, 0x1adad47d, 0x6ddde4eb, 0xf4d4b551, 0x83d385c7, | ||
137 | 0x136c9856, 0x646ba8c0, 0xfd62f97a, 0x8a65c9ec, 0x14015c4f, 0x63066cd9, 0xfa0f3d63, 0x8d080df5, | ||
138 | 0x3b6e20c8, 0x4c69105e, 0xd56041e4, 0xa2677172, 0x3c03e4d1, 0x4b04d447, 0xd20d85fd, 0xa50ab56b, | ||
139 | 0x35b5a8fa, 0x42b2986c, 0xdbbbc9d6, 0xacbcf940, 0x32d86ce3, 0x45df5c75, 0xdcd60dcf, 0xabd13d59, | ||
140 | 0x26d930ac, 0x51de003a, 0xc8d75180, 0xbfd06116, 0x21b4f4b5, 0x56b3c423, 0xcfba9599, 0xb8bda50f, | ||
141 | 0x2802b89e, 0x5f058808, 0xc60cd9b2, 0xb10be924, 0x2f6f7c87, 0x58684c11, 0xc1611dab, 0xb6662d3d, | ||
142 | 0x76dc4190, 0x01db7106, 0x98d220bc, 0xefd5102a, 0x71b18589, 0x06b6b51f, 0x9fbfe4a5, 0xe8b8d433, | ||
143 | 0x7807c9a2, 0x0f00f934, 0x9609a88e, 0xe10e9818, 0x7f6a0dbb, 0x086d3d2d, 0x91646c97, 0xe6635c01, | ||
144 | 0x6b6b51f4, 0x1c6c6162, 0x856530d8, 0xf262004e, 0x6c0695ed, 0x1b01a57b, 0x8208f4c1, 0xf50fc457, | ||
145 | 0x65b0d9c6, 0x12b7e950, 0x8bbeb8ea, 0xfcb9887c, 0x62dd1ddf, 0x15da2d49, 0x8cd37cf3, 0xfbd44c65, | ||
146 | 0x4db26158, 0x3ab551ce, 0xa3bc0074, 0xd4bb30e2, 0x4adfa541, 0x3dd895d7, 0xa4d1c46d, 0xd3d6f4fb, | ||
147 | 0x4369e96a, 0x346ed9fc, 0xad678846, 0xda60b8d0, 0x44042d73, 0x33031de5, 0xaa0a4c5f, 0xdd0d7cc9, | ||
148 | 0x5005713c, 0x270241aa, 0xbe0b1010, 0xc90c2086, 0x5768b525, 0x206f85b3, 0xb966d409, 0xce61e49f, | ||
149 | 0x5edef90e, 0x29d9c998, 0xb0d09822, 0xc7d7a8b4, 0x59b33d17, 0x2eb40d81, 0xb7bd5c3b, 0xc0ba6cad, | ||
150 | 0xedb88320, 0x9abfb3b6, 0x03b6e20c, 0x74b1d29a, 0xead54739, 0x9dd277af, 0x04db2615, 0x73dc1683, | ||
151 | 0xe3630b12, 0x94643b84, 0x0d6d6a3e, 0x7a6a5aa8, 0xe40ecf0b, 0x9309ff9d, 0x0a00ae27, 0x7d079eb1, | ||
152 | 0xf00f9344, 0x8708a3d2, 0x1e01f268, 0x6906c2fe, 0xf762575d, 0x806567cb, 0x196c3671, 0x6e6b06e7, | ||
153 | 0xfed41b76, 0x89d32be0, 0x10da7a5a, 0x67dd4acc, 0xf9b9df6f, 0x8ebeeff9, 0x17b7be43, 0x60b08ed5, | ||
154 | 0xd6d6a3e8, 0xa1d1937e, 0x38d8c2c4, 0x4fdff252, 0xd1bb67f1, 0xa6bc5767, 0x3fb506dd, 0x48b2364b, | ||
155 | 0xd80d2bda, 0xaf0a1b4c, 0x36034af6, 0x41047a60, 0xdf60efc3, 0xa867df55, 0x316e8eef, 0x4669be79, | ||
156 | 0xcb61b38c, 0xbc66831a, 0x256fd2a0, 0x5268e236, 0xcc0c7795, 0xbb0b4703, 0x220216b9, 0x5505262f, | ||
157 | 0xc5ba3bbe, 0xb2bd0b28, 0x2bb45a92, 0x5cb36a04, 0xc2d7ffa7, 0xb5d0cf31, 0x2cd99e8b, 0x5bdeae1d, | ||
158 | 0x9b64c2b0, 0xec63f226, 0x756aa39c, 0x026d930a, 0x9c0906a9, 0xeb0e363f, 0x72076785, 0x05005713, | ||
159 | 0x95bf4a82, 0xe2b87a14, 0x7bb12bae, 0x0cb61b38, 0x92d28e9b, 0xe5d5be0d, 0x7cdcefb7, 0x0bdbdf21, | ||
160 | 0x86d3d2d4, 0xf1d4e242, 0x68ddb3f8, 0x1fda836e, 0x81be16cd, 0xf6b9265b, 0x6fb077e1, 0x18b74777, | ||
161 | 0x88085ae6, 0xff0f6a70, 0x66063bca, 0x11010b5c, 0x8f659eff, 0xf862ae69, 0x616bffd3, 0x166ccf45, | ||
162 | 0xa00ae278, 0xd70dd2ee, 0x4e048354, 0x3903b3c2, 0xa7672661, 0xd06016f7, 0x4969474d, 0x3e6e77db, | ||
163 | 0xaed16a4a, 0xd9d65adc, 0x40df0b66, 0x37d83bf0, 0xa9bcae53, 0xdebb9ec5, 0x47b2cf7f, 0x30b5ffe9, | ||
164 | 0xbdbdf21c, 0xcabac28a, 0x53b39330, 0x24b4a3a6, 0xbad03605, 0xcdd70693, 0x54de5729, 0x23d967bf, | ||
165 | 0xb3667a2e, 0xc4614ab8, 0x5d681b02, 0x2a6f2b94, 0xb40bbe37, 0xc30c8ea1, 0x5a05df1b, 0x2d02ef8d, | ||
166 | }; | ||
167 | |||
168 | while (len--) { | ||
169 | crc32 = (crc32_lookup[(crc32 ^ *buf) & 0xff] ^ (crc32 >> 8)); | ||
170 | buf++; | ||
171 | } | ||
172 | |||
173 | return crc32; | ||
174 | } | ||
175 | #endif | ||
125 | 176 | ||
126 | /* Tool function to calculate a CRC32 (reversed polynomial) across some buffer */ | 177 | /* Tool function to calculate a CRC32 (reversed polynomial) across some buffer */ |
127 | /* third argument is either the starting value or value from last piece */ | 178 | /* third argument is either the starting value or value from last piece */ |
179 | /* space optimized version */ | ||
180 | #ifndef CRC32R_FAST | ||
128 | uint32_t crc_32r(const void *src, uint32_t len, uint32_t crc32) | 181 | uint32_t crc_32r(const void *src, uint32_t len, uint32_t crc32) |
129 | { | 182 | { |
130 | const unsigned char* buf = src; | 183 | const unsigned char* buf = src; |
131 | 184 | ||
185 | /* crc_32r (derived from tinf crc32 which was taken from zlib) | ||
186 | * CRC32 algorithm taken from the zlib source, which is | ||
187 | * Copyright (C) 1995-1998 Jean-loup Gailly and Mark Adler | ||
188 | */ | ||
189 | |||
132 | /* reversed polynomial from other crc32 function -- 0xEDB88320 */ | 190 | /* reversed polynomial from other crc32 function -- 0xEDB88320 */ |
133 | static const unsigned crc32_lookup[16] = | 191 | static const unsigned crc32_lookup[16] = |
134 | { | 192 | { |
@@ -147,3 +205,4 @@ uint32_t crc_32r(const void *src, uint32_t len, uint32_t crc32) | |||
147 | 205 | ||
148 | return crc32; | 206 | return crc32; |
149 | } | 207 | } |
208 | #endif | ||