src/statichuff/main_bychunk.c

   1
   2 #include "statichuff.h"
   3 #include <stdlib.h>
   4
   5 int main(int argc, char* argv[])
   6 {
   7         HUFF_STATE *shuff;
   8         FILE *fp;
   9         char *chunk = (char*)malloc(sizeof(char)*4);
  10         int cflag = 0;
  11         int dflag = 0;
  12         int tflag = 0;
  13         int sflag = 0;
  14         int mflag = 0;
  15         long int volumesize = 0;
  16         int lastchunk,i,j,ch,decoded = 0;
  17         char *staticmodel;
  18
  19         while ((ch = getopt(argc, argv, "scdm:t:")) != -1) {
  20
  21                 switch (ch) {
  22                         case 'c': cflag = 1;
  23                                           break;
  24
  25                         case 'd': dflag = 1;
  26                                           break;
  27
  28                         case 't': tflag = 1;
  29                                           volumesize = atoi(optarg);
  30                                           break;
  31
  32                         case 'm': mflag = 1;
  33                                           staticmodel = optarg;
  34                                           break;
  35
  36                         case 's': sflag = 1;
  37                                           break;
  38
  39                         default: fprintf(stderr, "Usage: %s [-cds] [-t volsizekb] sourcefile targetfile [-m modeldumpfile]\n", argv[0]);
  40                                          return(2);
  41                 }
  42         }
  43
  44         if ( (argc == 1) || (cflag & dflag) || !(cflag | dflag) || ((argc - optind) < 2) || (mflag & sflag)) {
  45                 fprintf(stderr, "Usage: %s [-cds] [-t volsizekb] sourcefile targetfile [-m modeldumpfile]\n", argv[0]);
  46                 if ((tflag == 1) && (volumesize < 0)) fprintf(stderr,"Error: The volume size must be a non-zero value\n");
  47                 return (2);
  48         }
  49
  50         if (cflag == 1) {
  51                 /* Inicio un compresor huffman estatico por chunks */
  52                 if ((shuff = shuff_init_encoder_bychunk(argv[optind+1],volumesize*1024)) == NULL) return 0;
  53                 if (mflag == 1) shuff_loadmodel(shuff,staticmodel);
  54
  55                 /* Comprimo por chunks */
  56                 if ((fp = fopen(argv[optind],"rb")) == NULL) return 1;
  57                 while (!feof(fp)) {
  58                         i = 0;
  59                         while (!feof(fp) && (i < 4))
  60                         {
  61                           ch = fgetc(fp);
  62                           if (feof(fp)) continue;
  63                           chunk[i] = ch;
  64                           i++;
  65                         }
  66                         /* Comprimo el chunk con huffman estatico */
  67                         shuff_scanfreq_chunk(shuff,chunk,i);
  68                 }
  69                 /* Le indico al huffman que efectivamente comprima los chunks */
  70                 shuff_encode_file(shuff);
  71                 if (sflag == 1) shuff_savemodel(shuff);
  72
  73                 /* De init encoder */
  74                 shuff_deinit_encoder(shuff);
  75
  76                 /* Free mem allocated by main */
  77                 free(shuff);
  78                 free(chunk);
  79
  80                 /* Close files opened by main */
  81                 fclose(fp);
  82         }
  83
  84         if (dflag == 1) {
  85                 /* Init decoder */
  86                 shuff = shuff_init_decoder(argv[optind],NULL);
  87                 fp = fopen(argv[optind+1],"w");
  88
  89                 /* Gimme chunks till last one */
  90                 while (shuff_decode_chunk(shuff,chunk,4,&decoded))
  91                         fwrite(chunk,decoded,1,fp);
  92
  93                 /* Last chunk written alone */
  94                 fwrite(chunk,decoded,1,fp);
  95                 fclose(fp);
  96
  97                 /* Deinit decoder */
  98                 shuff_deinit_decoder(shuff);
  99                 free(shuff);
 100         }
 101
 102         return 0;
 103 }