#include "stdio.h"#include "stdlib.h"#include "sys/types.h"#include "unistd.h"#include "fcntl.h"Include dependency graph for xsum.c:
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Defines | |
| #define | _POSIX_SOURCE |
| #define | O_RDONLY 0 |
| #define | O_BINARY O_RDONLY |
Typedefs | |
| typedef unsigned char | Uchar |
Functions | |
| void | usage (int rc) |
| long | sum32 (register long sum, register Uchar *x, int n) |
| int | cr_purge (Uchar *buf, int n) |
| void | process (char *s, int x) |
| main (int argc, char **argv) | |
Variables | |
| char * | progname |
| static int | ignore_cr |
| static Uchar | Buf [16 *1024] |
Definition at line 152 of file xsum.c.
References b.
Referenced by process().
00154 { 00155 register Uchar *b, *b1, *be; 00156 b = buf; 00157 be = b + n; 00158 while(b < be) 00159 if (*b++ == '\r') { 00160 b1 = b - 1; 00161 while(b < be) 00162 if ((*b1 = *b++) != '\r') 00163 b1++; 00164 return b1 - buf; 00165 } 00166 return n; 00167 }
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| main | ( | int | argc, | |
| char ** | argv | |||
| ) |
Definition at line 208 of file xsum.c.
References ignore_cr, O_BINARY, O_RDONLY, process(), progname, and usage().
00210 { 00211 int x; 00212 char *s; 00213 static int rc; 00214 00215 progname = *argv; 00216 argc = argc; /* turn off "not used" warning */ 00217 s = *++argv; 00218 if (s && *s == '-') { 00219 switch(s[1]) { 00220 case '?': 00221 usage(0); 00222 case 'r': 00223 ignore_cr = 1; 00224 case '-': 00225 break; 00226 default: 00227 fprintf(stderr, "invalid option %s\n", s); 00228 usage(1); 00229 } 00230 s = *++argv; 00231 } 00232 if (s) do { 00233 x = open(s, O_RDONLY|O_BINARY); 00234 if (x < 0) { 00235 fprintf(stderr, "%s: can't open %s\n", progname, s); 00236 rc |= 1; 00237 } 00238 else 00239 process(s, x); 00240 } 00241 while(s = *++argv); 00242 else { 00243 process("/dev/stdin", fileno(stdin)); 00244 } 00245 return rc; 00246 }
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| void process | ( | char * | s, | |
| int | x | |||
| ) |
Definition at line 177 of file xsum.c.
References close(), cr_purge(), ignore_cr, read(), and sum32().
Referenced by main().
00185 { 00186 register int n; 00187 long fsize, sum; 00188 00189 sum = 0; 00190 fsize = 0; 00191 while((n = read(x, (char *)Buf, sizeof(Buf))) > 0) { 00192 if (ignore_cr) 00193 n = cr_purge(Buf, n); 00194 fsize += n; 00195 sum = sum32(sum, Buf, n); 00196 } 00197 sum &= 0xffffffff; 00198 if (n==0) 00199 printf("%s\t%lx\t%ld\n", s, sum & 0xffffffff, fsize); 00200 else { perror(s); } 00201 close(x); 00202 }
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Definition at line 69 of file xsum.c.
Referenced by process().
00071 { 00072 register Uchar *xe; 00073 static long crc_table[256] = { 00074 0, 151466134, 302932268, 453595578, 00075 -9583591, -160762737, -312236747, -463170141, 00076 -19167182, -136529756, -321525474, -439166584, 00077 28724267, 145849533, 330837255, 448732561, 00078 -38334364, -189783822, -273059512, -423738914, 00079 47895677, 199091435, 282375505, 433292743, 00080 57448534, 174827712, 291699066, 409324012, 00081 -67019697, -184128295, -300991133, -418902539, 00082 -76668728, -227995554, -379567644, -530091662, 00083 67364049, 218420295, 369985021, 520795499, 00084 95791354, 213031020, 398182870, 515701056, 00085 -86479645, -203465611, -388624945, -506380967, 00086 114897068, 266207290, 349655424, 500195606, 00087 -105581387, -256654301, -340093543, -490887921, 00088 -134039394, -251295736, -368256590, -485758684, 00089 124746887, 241716241, 358686123, 476458301, 00090 -153337456, -2395898, -455991108, -304803798, 00091 162629001, 11973919, 465560741, 314102835, 00092 134728098, 16841012, 436840590, 319723544, 00093 -144044613, -26395347, -446403433, -329032703, 00094 191582708, 40657250, 426062040, 274858062, 00095 -200894995, -50223749, -435620671, -284179369, 00096 -172959290, -55056048, -406931222, -289830788, 00097 182263263, 64630089, 416513267, 299125861, 00098 229794136, 78991822, 532414580, 381366498, 00099 -220224191, -69691945, -523123603, -371788549, 00100 -211162774, -93398532, -513308602, -396314416, 00101 201600371, 84090341, 503991391, 386759881, 00102 -268078788, -117292630, -502591472, -351526778, 00103 258520357, 107972019, 493278217, 341959839, 00104 249493774, 131713432, 483432482, 366454964, 00105 -239911657, -122417791, -474129349, -356881235, 00106 -306674912, -457198666, -4791796, -156118374, 00107 315967289, 466778031, 14362133, 165418627, 00108 325258002, 442776452, 23947838, 141187752, 00109 -334573813, -452329571, -33509849, -150495567, 00110 269456196, 419996626, 33682024, 184992510, 00111 -278767779, -429561909, -43239823, -194312473, 00112 -288089226, -405591072, -52790694, -170046772, 00113 297394031, 415166457, 62373443, 179343061, 00114 383165416, 533828478, 81314500, 232780370, 00115 -373594127, -524527769, -72022307, -223201717, 00116 -401789990, -519431348, -100447498, -217810336, 00117 392228803, 510123861, 91131631, 208256633, 00118 -345918580, -496598246, -110112096, -261561802, 00119 336361365, 487278339, 100800185, 251995695, 00120 364526526, 482151208, 129260178, 246639108, 00121 -354943065, -472854735, -119955829, -237064675, 00122 459588272, 308539942, 157983644, 7181066, 00123 -469170519, -317835713, -167286907, -16754925, 00124 -440448382, -323454444, -139383890, -21619912, 00125 450006683, 332774925, 148697015, 31186721, 00126 -422325548, -271261118, -186797064, -36011154, 00127 431888077, 280569435, 196114401, 45565815, 00128 403200742, 286222960, 168180682, 50400092, 00129 -412770561, -295522711, -177471533, -59977915, 00130 -536157576, -384970002, -234585260, -83643454, 00131 526853729, 375396087, 225003341, 74348507, 00132 517040714, 399923932, 215944038, 98057200, 00133 -507728301, -390357307, -206385281, -88735767, 00134 498987548, 347783818, 263426864, 112501670, 00135 -489671163, -338229613, -253864151, -103192641, 00136 -479823314, -362722632, -244835582, -126932076, 00137 470531639, 353144481, 235265819, 117632909 00138 }; 00139 00140 xe = x + n; 00141 while(x < xe) 00142 sum = crc_table[(sum ^ *x++) & 0xff] ^ (sum >> 8 & 0xffffff); 00143 return sum; 00144 }
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| void usage | ( | int | rc | ) |
| char* progname |
1.5.1
