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GETPATF.C
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1986-12-10
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#include <stdio.h>
#include <stat.h>
#include "bm.h"
int GetPatFile(PatFile, DescVec)
char *PatFile;
struct PattDesc *DescVec[];
/* read patterns from a file and set up a pattern descriptor vector */
{
extern char *malloc();
FILE *PFile;
struct stat StatBuff;
int PatSize; /* the number of chars in all the patterns */
char *PatBuff; /* hold the patterns */
if (!(strlen(PatFile))) {
fprintf(stderr,"bm: no pattern file given\n");
exit(2);
} /* if */
if (!(PFile = fopen(PatFile,"r"))) {
fprintf(stderr,"bm: can't open pattern file %s\n",PatFile);
exit(2);
} /* if */
/* find out how big the patterns are */
if (stat(fileno(PFile),&StatBuff) == -1) {
fprintf(stderr,"bm: can't fstat %s\n",PatFile);
exit(2);
} /* if */
if (isatty(fileno(PFile)))
PatSize = PSIZEDEF;
else PatSize = StatBuff.st_size;
if (!PatSize) {
fprintf(stderr,"bm: pattern file is empty\n");
exit(2);
} /* if */
if (!(PatBuff = malloc(PatSize+1))) {
fprintf(stderr,"bm: insufficient memory to store patterns\n");
exit(2);
} /* if */
fread(PatBuff,1,PatSize,PFile); /* get the patterns */
/* make sure the patterns are null-terminated. We can't have
* nulls in the patterns */
if (PatBuff[PatSize-1] == '\n')
PatBuff[PatSize-1] = '\0';
else
PatBuff[PatSize] = '\0';
fclose(PFile);
return(MkDescVec(DescVec,PatBuff));
} /* GetPatFile */