lib-src/strings/bmgrep.cc

   1 //////////////////////////////////////////////////////////////////////////////
   2 // NOTICE:
   3 //
   4 // ADLib, Prop and their related set of tools and documentation are in the
   5 // public domain.   The author(s) of this software reserve no copyrights on
   6 // the source code and any code generated using the tools.  You are encouraged
   7 // to use ADLib and Prop to develop software, in both academic and commercial
   8 // settings, and are free to incorporate any part of ADLib and Prop into
   9 // your programs.
  10 //
  11 // Although you are under no obligation to do so, we strongly recommend that
  12 // you give away all software developed using our tools.
  13 //
  14 // We also ask that credit be given to us when ADLib and/or Prop are used in
  15 // your programs, and that this notice be preserved intact in all the source
  16 // code.
  17 //
  18 // This software is still under development and we welcome any suggestions
  19 // and help from the users.
  20 //
  21 // Allen Leung
  22 // 1994
  23 //////////////////////////////////////////////////////////////////////////////
  24
  25 #include <stdlib.h>
  26 #include <stdio.h>
  27 #include <AD/strings/bm.h>
  28
  29 int grep(const char * fileName,FILE * file,BoyerMoore& pattern)
  30 {
  31    char buffer[BUFSIZ];
  32    int notMatched = 1;
  33    int line = 1;
  34    while (fgets(buffer,BUFSIZ,file)) {
  35       if (pattern.match(buffer) >= 0)
  36          if (fileName)
  37             printf("%s[%d]: %s", fileName, line, buffer);
  38          else
  39             printf("[%d]: %s", line, buffer);
  40       line++;
  41    }
  42    return notMatched;
  43 }
  44
  45 int main(int argc, char * argv[])
  46 {
  47    if (argc == 1) {
  48       fprintf(stderr,"usage: %s pattern [files ...]\n",argv[0]);
  49       return 0;
  50    }
  51    BoyerMoore pattern = argv[1];
  52    int failure = 0;
  53    if (argc == 2) {
  54       failure += grep("",stdin,pattern);
  55    } else {
  56       for (int i = 2; i < argc; i++) {
  57          FILE * file = fopen(argv[i],"r");
  58          if (file == NULL) { perror(argv[i]); exit(1); }
  59          failure += grep(argv[i],file,pattern);
  60          fclose(file);
  61       }
  62    }
  63    return failure;
  64 }