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// cksum.c, version 1.0.4 |
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// OMKOV coreutils implementation of POSIX cksum |
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// Copyright (C) 2020, Jakob Wakeling |
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// MIT Licence |
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#include "util/error.h" |
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#include "util/optget.h" |
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#include <stdbool.h> |
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#include <stdint.h> |
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#include <stdio.h> |
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#define VERSION "1.0.4" |
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static struct lop lops[] = { |
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{ "help", ARG_NUL, 256 }, |
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{ "version", ARG_NUL, 257 }, |
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{ NULL, 0, 0 } |
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}; |
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static const uint32_t CRC[]; |
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static inline int cksum(const char *file); |
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static void hlp(void); |
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static void ver(void); |
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int main(int ac, char *av[]) { A0 = av[0]; |
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struct opt opt = OPTGET_INIT; opt.str = ""; opt.lops = lops; |
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for (int o; (o = optget(&opt, av, 1)) != -1;) switch (o) { |
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case 256: { hlp(); return 0; } |
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case 257: { ver(); return 0; } |
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default: { return 1; } |
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} |
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bool warned = false; |
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if (opt.ind == ac) { cksum(NULL); } |
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else for (char **p = &av[opt.ind]; *p; ++p) if (cksum(*p)) { |
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warn("%s: %s", *p, serr()); warned = true; |
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} |
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return warned; |
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} |
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static inline int cksum(const char *file) { |
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uint8_t buf[BUFSIZ * 16]; FILE *fi; |
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register size_t fl = 0; register uint32_t crc = 0; |
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if (!file || (file[0] == '-' && file[1] == 0)) { fi = stdin; } |
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else if (!(fi = fopen(file, "r"))) { return 1; } |
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for (size_t c; (c = fread(buf, 1, sizeof (buf), fi)); fl += c) { |
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for (register size_t i = 0; i != c; ++i) { |
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crc = (crc << 8) ^ CRC[(crc >> 24) ^ (buf[i] & 0xFF)]; |
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} |
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} |
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for (register size_t n = fl; n; n >>= 8) { |
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crc = (crc << 8) ^ CRC[(crc >> 24) ^ (n & 0xFF)]; |
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} crc = ~crc; |
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printf("%u %zu", crc, fl); |
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if (file) { printf(" %s", file); } fputc('\n', stdout); |
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if (fi != stdin) { fclose(fi); } return 0; |
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} |
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static void hlp(void) { |
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puts("cksum - write file checksums and sizes\n"); |
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puts("usage: cksum [file...]\n"); |
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puts("options:"); |
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puts(" --help Display help information"); |
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puts(" --version Display version information"); |
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} |
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static void ver(void) { |
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puts("OMKOV coreutils cksum, version " VERSION); |
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puts("Copyright (C) 2020, Jakob Wakeling"); |
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puts("MIT Licence (https://opensource.org/licenses/MIT)"); |
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} |
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static const uint32_t CRC[] = { |
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0x00000000, 0x04C11DB7, 0x09823B6E, 0x0D4326D9, 0x130476DC, 0x17C56B6B, |
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0x1A864DB2, 0x1E475005, 0x2608EDB8, 0x22C9F00F, 0x2F8AD6D6, 0x2B4BCB61, |
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0x350C9B64, 0x31CD86D3, 0x3C8EA00A, 0x384FBDBD, 0x4C11DB70, 0x48D0C6C7, |
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0x4593E01E, 0x4152FDA9, 0x5F15ADAC, 0x5BD4B01B, 0x569796C2, 0x52568B75, |
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0x6A1936C8, 0x6ED82B7F, 0x639B0DA6, 0x675A1011, 0x791D4014, 0x7DDC5DA3, |
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0x709F7B7A, 0x745E66CD, 0x9823B6E0, 0x9CE2AB57, 0x91A18D8E, 0x95609039, |
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0x8B27C03C, 0x8FE6DD8B, 0x82A5FB52, 0x8664E6E5, 0xBE2B5B58, 0xBAEA46EF, |
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0xB7A96036, 0xB3687D81, 0xAD2F2D84, 0xA9EE3033, 0xA4AD16EA, 0xA06C0B5D, |
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0xD4326D90, 0xD0F37027, 0xDDB056FE, 0xD9714B49, 0xC7361B4C, 0xC3F706FB, |
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0xCEB42022, 0xCA753D95, 0xF23A8028, 0xF6FB9D9F, 0xFBB8BB46, 0xFF79A6F1, |
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0xE13EF6F4, 0xE5FFEB43, 0xE8BCCD9A, 0xEC7DD02D, 0x34867077, 0x30476DC0, |
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0x3D044B19, 0x39C556AE, 0x278206AB, 0x23431B1C, 0x2E003DC5, 0x2AC12072, |
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0x128E9DCF, 0x164F8078, 0x1B0CA6A1, 0x1FCDBB16, 0x018AEB13, 0x054BF6A4, |
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0x0808D07D, 0x0CC9CDCA, 0x7897AB07, 0x7C56B6B0, 0x71159069, 0x75D48DDE, |
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0x6B93DDDB, 0x6F52C06C, 0x6211E6B5, 0x66D0FB02, 0x5E9F46BF, 0x5A5E5B08, |
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0x571D7DD1, 0x53DC6066, 0x4D9B3063, 0x495A2DD4, 0x44190B0D, 0x40D816BA, |
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0xACA5C697, 0xA864DB20, 0xA527FDF9, 0xA1E6E04E, 0xBFA1B04B, 0xBB60ADFC, |
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2020-08-14 01:09:57 |
100
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0xB6238B25, 0xB2E29692, 0x8AAD2B2F, 0x8E6C3698, 0x832F1041, 0x87EE0DF6, |
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2020-08-14 01:09:57 |
101
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0x99A95DF3, 0x9D684044, 0x902B669D, 0x94EA7B2A, 0xE0B41DE7, 0xE4750050, |
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102
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0xE9362689, 0xEDF73B3E, 0xF3B06B3B, 0xF771768C, 0xFA325055, 0xFEF34DE2, |
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2020-08-14 01:09:57 |
103
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0xC6BCF05F, 0xC27DEDE8, 0xCF3ECB31, 0xCBFFD686, 0xD5B88683, 0xD1799B34, |
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Jamozed |
2020-08-14 01:09:57 |
104
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0xDC3ABDED, 0xD8FBA05A, 0x690CE0EE, 0x6DCDFD59, 0x608EDB80, 0x644FC637, |
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Jamozed |
2020-08-14 01:09:57 |
105
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0x7A089632, 0x7EC98B85, 0x738AAD5C, 0x774BB0EB, 0x4F040D56, 0x4BC510E1, |
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Jamozed |
2020-08-14 01:09:57 |
106
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0x46863638, 0x42472B8F, 0x5C007B8A, 0x58C1663D, 0x558240E4, 0x51435D53, |
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Jamozed |
2020-08-14 01:09:57 |
107
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0x251D3B9E, 0x21DC2629, 0x2C9F00F0, 0x285E1D47, 0x36194D42, 0x32D850F5, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
108
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0x3F9B762C, 0x3B5A6B9B, 0x0315D626, 0x07D4CB91, 0x0A97ED48, 0x0E56F0FF, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
109
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0x1011A0FA, 0x14D0BD4D, 0x19939B94, 0x1D528623, 0xF12F560E, 0xF5EE4BB9, |
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Jamozed |
2020-08-14 01:09:57 |
110
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0xF8AD6D60, 0xFC6C70D7, 0xE22B20D2, 0xE6EA3D65, 0xEBA91BBC, 0xEF68060B, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
111
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0xD727BBB6, 0xD3E6A601, 0xDEA580D8, 0xDA649D6F, 0xC423CD6A, 0xC0E2D0DD, |
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2020-08-14 01:09:57 |
112
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0xCDA1F604, 0xC960EBB3, 0xBD3E8D7E, 0xB9FF90C9, 0xB4BCB610, 0xB07DABA7, |
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Jamozed |
2020-08-14 01:09:57 |
113
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0xAE3AFBA2, 0xAAFBE615, 0xA7B8C0CC, 0xA379DD7B, 0x9B3660C6, 0x9FF77D71, |
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Jamozed |
2020-08-14 01:09:57 |
114
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0x92B45BA8, 0x9675461F, 0x8832161A, 0x8CF30BAD, 0x81B02D74, 0x857130C3, |
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Jamozed |
2020-08-14 01:09:57 |
115
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0x5D8A9099, 0x594B8D2E, 0x5408ABF7, 0x50C9B640, 0x4E8EE645, 0x4A4FFBF2, |
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Jamozed |
2020-08-14 01:09:57 |
116
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0x470CDD2B, 0x43CDC09C, 0x7B827D21, 0x7F436096, 0x7200464F, 0x76C15BF8, |
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Jamozed |
2020-08-14 01:09:57 |
117
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0x68860BFD, 0x6C47164A, 0x61043093, 0x65C52D24, 0x119B4BE9, 0x155A565E, |
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Jamozed |
2020-08-14 01:09:57 |
118
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0x18197087, 0x1CD86D30, 0x029F3D35, 0x065E2082, 0x0B1D065B, 0x0FDC1BEC, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
119
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0x3793A651, 0x3352BBE6, 0x3E119D3F, 0x3AD08088, 0x2497D08D, 0x2056CD3A, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
120
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0x2D15EBE3, 0x29D4F654, 0xC5A92679, 0xC1683BCE, 0xCC2B1D17, 0xC8EA00A0, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
121
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0xD6AD50A5, 0xD26C4D12, 0xDF2F6BCB, 0xDBEE767C, 0xE3A1CBC1, 0xE760D676, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
122
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0xEA23F0AF, 0xEEE2ED18, 0xF0A5BD1D, 0xF464A0AA, 0xF9278673, 0xFDE69BC4, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
123
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0x89B8FD09, 0x8D79E0BE, 0x803AC667, 0x84FBDBD0, 0x9ABC8BD5, 0x9E7D9662, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
124
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0x933EB0BB, 0x97FFAD0C, 0xAFB010B1, 0xAB710D06, 0xA6322BDF, 0xA2F33668, |
01daec6 |
Jamozed |
2020-08-14 01:09:57 |
125
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0xBCB4666D, 0xB8757BDA, 0xB5365D03, 0xB1F740B4 |
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126
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}; |
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127
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