modindex.c

   1 #include <stdlib.h>
   2 #include <stdio.h>
   3 #include <getopt.h>
   4 #include <errno.h>
   5 #include <string.h>
   6
   7 #include "util.h"
   8 #include "logging.h"
   9 #include "index.h"
  10
  11 static void write_index(const char *filename)
  12 {
  13         struct index_node *index;
  14         char *line, *pos;
  15         FILE *cfile;
  16         unsigned int linenum = 0;
  17
  18         cfile = fopen(filename, "w");
  19         if (!cfile)
  20                 fatal("Could not open %s for writing: %s\n",
  21                       filename, strerror(errno));
  22
  23         index = index_create();
  24
  25         while((line = getline_wrapped(stdin, &linenum))) {
  26                 pos = strchr(line, ' ');
  27                 *pos++ = '\0';
  28                 index_insert(index, line, pos, linenum);
  29                 free(line);
  30         }
  31
  32         index_write(index, cfile);
  33         index_destroy(index);
  34         fclose(cfile);
  35 }
  36
  37 static struct index_file *open_index(const char *filename)
  38 {
  39         struct index_file *index;
  40
  41         index = index_file_open(filename);
  42         if (!index) {
  43                 if (errno == EINVAL)
  44                         fatal("%s has wrong magic or version number", filename);
  45
  46                 fatal("Could not open %s for reading: %s\n",
  47                       filename, strerror(errno));
  48         }
  49
  50         return index;
  51 }
  52
  53 static void dump_index(const char *filename)
  54 {
  55         struct index_file *index = open_index(filename);
  56
  57         index_dump(index, stdout, "");
  58
  59         index_file_close(index);
  60 }
  61
  62 static void search_index(const char *filename, char *key)
  63 {
  64         struct index_file *index = open_index(filename);
  65         char *value;
  66
  67         value = index_search(index, key);
  68         if (value)
  69                 printf("Found value:\n%s\n", value);
  70         else
  71                 printf("Not found.\n");
  72
  73         free(value);
  74         index_file_close(index);
  75 }
  76
  77 static void searchwild_index(const char *filename, char *key)
  78 {
  79         struct index_file *index = open_index(filename);
  80         struct index_value *values, *v;
  81
  82         values = index_searchwild(index, key);
  83         if (values)
  84                 printf("Found value(s):\n");
  85         else
  86                 printf("Not found.\n");
  87
  88         for (v = values; v; v = v->next)
  89                 printf("%s\n", v->value);
  90
  91         index_values_free(values);
  92         index_file_close(index);
  93 }
  94
  95 static void print_usage(const char *progname)
  96 {
  97         fprintf(stderr,
  98                 "Usage: %s [MODE] [FILE] ...\n"
  99                 " -o, --output <outfile>\n"
 100                 " -d, --dump <infile>\n"
 101                 " -s, --search <infile> <key>\n"
 102                 " -w, --searchwild <infile> <key>\n"
 103                 ,progname);
 104         exit(1);
 105 }
 106
 107 static struct option options[] = {
 108         { "output", 0, NULL, 'o' },
 109         { "dump", 0, NULL, 'd' },
 110         { "search", 0, NULL, 's' },
 111         { "searchwild", 0, NULL, 'w' },
 112 };
 113
 114 int main(int argc, char *argv[])
 115 {
 116         char opt;
 117         char mode = 0;
 118         char *filename = NULL;
 119         char *key = NULL;
 120
 121         while ((opt = getopt_long(argc, argv, "odsw", options, NULL))
 122                        != -1) {
 123                 switch (opt) {
 124                         case 'o':
 125                                 mode = 'o';
 126                                 break;
 127                         case 'd':
 128                                 mode = 'd';
 129                                 break;
 130                         case 's':
 131                                 mode = 's';
 132                                 break;
 133                         case 'w':
 134                                 mode = 'w';
 135                                 break;
 136                         default:
 137                                 print_usage(argv[0]);
 138                 }
 139         }
 140         if (!mode)
 141                 print_usage(argv[0]);
 142
 143         if (optind >= argc)
 144                 print_usage(argv[0]);
 145         filename = argv[optind];
 146
 147         if (mode == 's' || mode == 'w') {
 148                 if (optind+1 >= argc)
 149                         print_usage(argv[0]);
 150                 key = argv[optind+1];
 151         }
 152
 153         switch(mode) {
 154                 case 'o':
 155                         write_index(filename);
 156                         break;
 157                 case 'd':
 158                         dump_index(filename);
 159                         break;
 160                 case 's':
 161                         search_index(filename, key);
 162                         break;
 163                 case 'w':
 164                         searchwild_index(filename, key);
 165                         break;
 166         }
 167
 168         return 0;
 169 }