src/jacu.c

   1
   2 #include "blocksorting/bs.h"
   3 #include "mtf/mtf.h"
   4 #include "zerogrouping/zerogrouping.h"
   5 #include "statichuff/statichuff.h"
   6 #include "vfile/vfile.h"
   7 #include <stdlib.h>
   8 #include <stdio.h>
   9 #include <unistd.h>
  10
  11 int main(int argc, char* argv[])
  12 {
  13         int cflag = 0;
  14         int dflag = 0;
  15         int zflag = 0;
  16         int tflag = 0;
  17         int pflag = 0;
  18         long int volumesize = 0;
  19         size_t pagesize = 32768; /* 32KB */
  20         int ch;
  21         t_BlockSort *bs;
  22
  23         while ((ch = getopt(argc, argv, "cdzt:p:")) != -1) {
  24
  25                 switch (ch) {
  26                         case 'c': cflag = 1;
  27                                           break;
  28
  29                         case 'd': dflag = 1;
  30                                           break;
  31
  32                         case 'z': zflag = 1;
  33                                           break;
  34
  35                         case 't': tflag = 1;
  36                                           volumesize = atol(optarg);
  37                                           break;
  38
  39                         case 'p': pflag = 1;
  40                                           pagesize = atoi(optarg);
  41                                           break;
  42
  43                         default: fprintf(stderr, "Usage: %s [-cdpt] sourcefile targetfile\n", argv[0]);
  44                                          return(2);
  45                 }
  46         }
  47
  48         if ( (argc == 1) || (cflag & dflag) || !(cflag | dflag) || ((argc - optind) < 2) ) {
  49                 fprintf(stderr, "Usage: %s [-cdt] sourcefile targetfile\n", argv[0]);
  50                 return (3);
  51         }
  52         if ((tflag) && (volumesize <= 0l)) {
  53                 fprintf(stderr,"Error: The volume size must be a non-zero value\n");
  54                 return (4);
  55         }
  56         if ((pflag) && (pagesize <= 1u)) {
  57                 fprintf(stderr,"Error: El tamaño de página debe ser mayor a 1 byte.\n");
  58                 return (5);
  59         }
  60
  61         if (cflag == 1) {
  62                 /* Comprimo */
  63                 /* No me gusta el tmpfile ... es para probar como anda todo junto */
  64                 FILE *fp, *fp_out;
  65                 unsigned long int i, j, total, k;
  66                 char *mtf;
  67                 char *salida, *data, c;
  68                 data = malloc(sizeof(char)*pagesize);
  69                 /* Reservo lugar tambien para guardar el k y el tamaño  */
  70                 salida = malloc(sizeof(char)*(pagesize)+sizeof(unsigned long int)*2);
  71                 bs = bs_create(pagesize);
  72
  73                 fp = fopen(argv[optind], "rb");
  74                 fp_out = fopen("tmp.comp", "wb");
  75
  76                 c = fgetc(fp);
  77                 total = 0;
  78                 while (!feof(fp)) {
  79                         i = 0;
  80                         while ((!feof(fp)) && (i < pagesize)) {
  81                                 data[i++] = c;
  82                                 c = fgetc(fp);
  83                                 total++;
  84                         }
  85
  86                         /* Hago el BS */
  87                         bs_solve(data, salida, bs, &k, i);
  88
  89                         /* Le aplico el MTF, salteo el tamaño del bloque para que no se pierda. */
  90                         mtf = jacu_mtf(salida+sizeof(unsigned long int), i+sizeof(unsigned long int));
  91
  92                         /* Si me lo piden, aplico ZG. */
  93                         if (zflag)
  94                         {
  95                                 size_t len;
  96                                 char buff[2];
  97                                 ZG zg;
  98                                 zg_init(&zg);
  99                                 for (j = 0; j < i; ++j)
 100                                         if ((len = zg_group(&zg, buff, mtf[j]))) fwrite(buff, 1, len, fp_out);
 101                         }
 102                         else
 103                         {
 104                                 for(j=0; j<i; j++)
 105                                         fputc(mtf[j], fp_out);
 106                         }
 107                         free(mtf);
 108                 }
 109
 110                 /* Limpiando */
 111                 fclose(fp);
 112                 fclose(fp_out);
 113                 bs_destroy(bs);
 114
 115                 /* Comprimo con huffman */
 116                 i = shuff_encode_file("tmp.comp",argv[optind+1], volumesize);
 117
 118                 /* borro el temporal */
 119                 unlink("tmp.comp");
 120                 return i;
 121         }
 122
 123         if (dflag == 1) {
 124                 /* Descomprimo */
 125                 FILE *fp_out;
 126                 VFILE *fp_in;
 127                 unsigned long int block_size, k;
 128                 char *block, *mtf, *orig;
 129                 int *pos;
 130
 131                 shuff_decode_file(argv[optind], "tmp.comp"); /*argv[optind+1]);*/
 132                 fp_in = vfopen("tmp.comp", "r", 0);
 133                 fp_out = fopen(argv[optind+1], "wb");
 134
 135                 while (!vfeof(fp_in)) {
 136                         block_size = 0;
 137                         vfread(&block_size, sizeof(unsigned long int), 1, fp_in);
 138                         if (block_size > 0) {
 139                                 block = malloc((block_size+sizeof(unsigned long int))*sizeof(char));
 140                                 orig = malloc(block_size*sizeof(char));
 141                                 vfread(block, block_size, sizeof(char), fp_in);
 142
 143                                 mtf = jacu_mtf_inv(block, /*XXX NO LO TENGO XXX */pos, block_size);
 144
 145                                 memcpy(&k, block, sizeof(unsigned long int));
 146
 147                                 bs_restore(orig, block+sizeof(unsigned long int), k, block_size);
 148
 149                                 fwrite(orig, block_size, sizeof(char), fp_out);
 150                                 free(block);
 151                                 free(orig);
 152                                 free(mtf);
 153                         }
 154                 }
 155                 vfclose(fp_in);
 156                 fclose(fp_out);
 157         }
 158
 159         return 0;
 160 }