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/*
# Substitute the region between BEGIN and END in FILE1 into FILE2
*/
#include <stdio.h>
#include <string.h>
#include <stdlib.h>
void scanCopyToLine(FILE *fp, char *line,FILE *outstream);
int
main(int argc,char *argv[])
{
if (argc < 5)
{
ERROR:
fprintf(stderr,"Usage: file-sub subFile FileToSubInto BEGIN END [outfile -]");
exit(1);
}
{
FILE *file1;
FILE *file2;
FILE *outstream = stdout;
char *begin=argv[3];
char *end=argv[4];
file2= fopen(argv[2],"rb");
file1= fopen(argv[1],"rb");
if (argc>=6 && strcmp(argv[5],"-")!=0) {
outstream= fopen(argv[5],"wb");
}
if (file1==0 || file2==0) goto ERROR;
{
scanCopyToLine(file2,begin,outstream);
scanCopyToLine(file1,begin,0);
scanCopyToLine(file1,end,outstream);
scanCopyToLine(file2,end,0);
scanCopyToLine(file2,0,outstream);
}
if (outstream != stdout) fclose(outstream);
}
return 0;
}
/* copy from fp to outstream all lines up to and including
one beginning with LINE
*/
void
scanCopyToLine(FILE *fp, char *line,FILE *outstream)
{
int length=0;
int finish=0;
char buf[5000];
if (line) length = strlen(line);
while (!finish && !feof(fp)) {
char *s = fgets(buf,sizeof(buf),fp);
if (line && s && strncmp(line,s,length)==0) {
finish=1;
}
if (s && outstream)
fputs(s,outstream);
}
}
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