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Almathera Ten Pack 3: CDPD 3
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Almathera Ten on Ten - Disc 3: CDPD3.iso
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fish
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001-025
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004
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bm
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bm.c
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C/C++ Source or Header
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1995-03-17
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2KB
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105 lines
#include <stdio.h>
#ifdef BSD
#include <sys/file.h>
#else
#include <fcntl.h>
#endif
#ifdef BSD
#include <strings.h>
#else
#include <string.h>
#endif
#include "bm.h"
#include "Extern.h"
main(argc,argv)
int argc;
char *argv[];
{
/* test driver for grep based on Boyer-Moore algorithm */
char BigBuff[MAXBUFF + 2];
/*
* We leave one extra character at the beginning and end of the buffer,
* but don't tell Execute about it. This is so when someone is
* scanning the buffer and scans past the end (or beginning)
* we are still technically in the buffer (picky, but there ARE
* machines which would complain)
*/
int ret = 1, /* return code from Execute */
NotFound = 0, /* non-zero if file not readable */
NFiles,
NPats; /* number of patterns to search for */
char i,
*FlagPtr,
**OptPtr; /* used to scan command line */
int TextFile /* file to search */;
struct PattDesc *DescVec[MAXPATS];
--argc;
OptPtr = argv + 1;
while ( argc && **OptPtr == '-') {
FlagPtr = *OptPtr + 1;
while (*FlagPtr) {
switch (*FlagPtr) {
case 'c': cFlag = 1; break;
case 'e': eFlag = 1;
/* get the patterns from next arg */
NPats = MkDescVec(DescVec,*++OptPtr);
--argc;
break;
case 'f': fFlag = 1;
/* read the patterns from a file */
NPats = GetPatFile(*++OptPtr,DescVec);
--argc;
break;
case 'l': lFlag = 1; break;
case 'n': nFlag = 1; break;
case 's': sFlag = 1; break;
case 'x': xFlag = 1; break;
case 'h': hFlag = 1; break;
default:
fprintf(stderr,
"bm: invalid option: -%c \n",
*FlagPtr);
PutUsage();
exit(2);
} /* switch */
++FlagPtr;
} /* while */
++OptPtr; --argc;
} /* while */
/* OptPtr now points to patterns */
if (!fFlag && !eFlag) {
if (!argc) {
fprintf(stderr,"bm: no pattern specified\n");
PutUsage();
exit(2);
} else
NPats = MkDescVec(DescVec,*OptPtr);
++OptPtr; --argc;
}
/* OptPtr now points to first file */
NFiles = argc;
if (!NFiles)
ret &= Execute(DescVec,NPats,0,BigBuff+1);
else while (argc--) {
if ((NFiles > 1) || lFlag) FileName = *OptPtr;
if ((TextFile = open(*OptPtr,O_RDONLY,0)) < 0) {
fprintf(stderr,"bm: can't open %s\n",*OptPtr);
NotFound++;
}
else {
ret &= Execute(DescVec,NPats,TextFile,BigBuff+1);
if (sFlag && !ret)
exit(0);
close(TextFile);
} /* if */
++OptPtr;
} /* while */
if (cFlag) printf("%d\n",MatchCount);
exit(NotFound ? 2 : ret);
} /* main */