104 lines
1.7 KiB
C
104 lines
1.7 KiB
C
/*--- excludewords ---*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#define MAXLINE 100
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static FILE *ex;
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static FILE *in;
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static FILE *out;
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static int line_comp(char *ex, char *in, int l)
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/*
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** Compare exclude line with cinline
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*/
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{
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return strncmp(ex,in+11,l);
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}
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static void process()
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/*
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** Do the work
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*/
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{
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char exline[MAXLINE];
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char cinline[MAXLINE];
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char *exok, *inok;
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int compare;
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exok = fgets(exline,MAXLINE,ex);
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inok = fgets(cinline,MAXLINE,in);
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while (exok && inok) {
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compare = line_comp(exok,inok,MAXLINE);
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if (compare < 0)
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exok = fgets(exline,MAXLINE,ex);
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else if (compare > 0) {
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fprintf(out,"%s",cinline);
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inok = fgets(cinline,MAXLINE,in);
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} else
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inok = fgets(cinline,MAXLINE,in);
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}
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while (inok = fgets(cinline,MAXLINE,in))
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fprintf(out,"%s",cinline);
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}
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int main(int argc, char *argv[])
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/*
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** Open files
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*/
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{
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if (argc < 2 || argc > 4) {
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fprintf(stderr,"Usage: excludewords word_file [file_in [file_out]]\n");
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exit(2);
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}
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/* set default files */
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in = stdin; out = stdout;
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switch (argc) {
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case 4:
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if ( (out = fopen(argv[3],"w")) == NULL ) {
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fprintf(stderr,"excludewords: Cannot open file %s for output\n",argv[3]);
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exit(1);
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}
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case 3:
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if ( (in = fopen(argv[2],"r")) == NULL) {
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fprintf(stderr,"excludewords: Cannot open file %s for input\n",argv[2]);
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exit(1);
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}
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case 2:
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if ( (ex = fopen(argv[1],"r")) == NULL) {
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fprintf(stderr,"excludewords: Cannot open exclude file %s\n",argv[1]);
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exit(1);
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}
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}
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process();
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switch (argc) {
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case 4: fclose(out);
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case 3: fclose(in);
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case 2: fclose(ex);
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}
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return 0;
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}
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