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 "vfile/common.h"
   8 #include <stdlib.h>
   9 #include <stdio.h>
  10 #include <unistd.h>
  11
  12 long get_file_size(const char* filename);
  13
  14 int main(int argc, char* argv[])
  15 {
  16         int cflag = 0;
  17         int dflag = 0;
  18         int zflag = 0;
  19         int tflag = 0;
  20         int qflag = 0;
  21         long int volumesize = 0;
  22         size_t pagesize = 32768; /* 32KB */
  23         int ch;
  24         t_BlockSort *bs;
  25
  26         while ((ch = getopt(argc, argv, "cdzt:q:")) != -1) {
  27
  28                 switch (ch) {
  29                         case 'c': cflag = 1;
  30                                           break;
  31
  32                         case 'd': dflag = 1;
  33                                           break;
  34
  35                         case 'z': zflag = 1;
  36                                           break;
  37
  38                         case 't': tflag = 1;
  39                                 volumesize = atol(optarg);
  40                                 break;
  41
  42                         case 'q': qflag = 1;
  43                                 switch (atoi(optarg))
  44                                 {
  45                                         case 0: pagesize = 1024; /* 1K */
  46                                                 break;
  47                                         case 1: pagesize = 2048; /* 2K */
  48                                                 break;
  49                                         case 2: pagesize = 4096; /* 4K */
  50                                                 break;
  51                                         case 3: pagesize = 8192; /* 8K */
  52                                                 break;
  53                                         case 4: pagesize = 16384; /* 16K */
  54                                                 break;
  55                                         case 5: pagesize = 32768; /* 32K */
  56                                                 break;
  57                                         case 6: pagesize = 65536; /* 64K */
  58                                                 break;
  59                                         case 7: pagesize = 131072; /* 128K */
  60                                                 break;
  61                                         case 8: pagesize = 262144; /* 256K */
  62                                                 break;
  63                                         case 9: pagesize = 524288; /* 512K */
  64                                                 break;
  65                                         default: pagesize = 0; /* error */
  66                                 }
  67                                 break;
  68
  69                         default: fprintf(stderr, "Usage: %s [-cdpt] sourcefile targetfile\n", argv[0]);
  70                                          return(2);
  71                 }
  72         }
  73
  74         if ( (argc == 1) || (cflag & dflag) || !(cflag | dflag) || ((argc - optind) < 2) ) {
  75                 fprintf(stderr, "Usage: %s [-cdt] sourcefile targetfile\n", argv[0]);
  76                 return (3);
  77         }
  78         if ((tflag) && (volumesize <= 0l)) {
  79                 fprintf(stderr,"Error: The volume size must be a non-zero value\n");
  80                 return (4);
  81         }
  82         if ((qflag) && (pagesize <= 1u)) {
  83                 fprintf(stderr,"Error: El nivel de compresión debe ser entre 0 (menor) y 9 (mayor).\n");
  84                 return (5);
  85         }
  86
  87         if (cflag == 1) {
  88                 /* Comprimo */
  89                 /* No me gusta el tmpfile ... es para probar como anda todo junto */
  90                 FILE *fp, *fp_out;
  91                 Uint32 i, j, total, k;
  92                 char *mtf;
  93                 char *salida, *data, c;
  94                 char *z;
  95                 int z_len;
  96
  97                 data = malloc(sizeof(char)*pagesize);
  98                 /* Reservo lugar tambien para guardar el k y el tamaño  */
  99                 salida = malloc(sizeof(char)*pagesize+sizeof(Uint32)*2);
 100                 bs = bs_create(pagesize);
 101
 102                 fp = fopen(argv[optind], "rb");
 103                 fp_out = fopen("tmp.comp", "wb");
 104
 105                 /*c = fgetc(fp);*/
 106                 total = 0;
 107                 while (!feof(fp)) {
 108                         i = 0;
 109                         while ((!feof(fp)) && (i < pagesize)) {
 110                                 data[i++] = fgetc(fp);
 111                                 total++;
 112                         }
 113
 114                         /* Saco un EOF que lee de mas */
 115                         if (i<pagesize) i--;
 116
 117                         /* Hago el BS */
 118                         bs_solve(data, salida, bs, &k, i);
 119
 120                         /*printf("BS k=%ld\n", *(Uint32 *)(salida+sizeof(Uint32)));
 121                         printf("PageSize = %ld\n", *(Uint32 *)salida);
 122
 123                         printf("Antes de MTF = %ld [", i);
 124                         {
 125                                 int ii;
 126                                 for(ii=0; ii<(i+sizeof(Uint32)); ii++)
 127                                         printf("(%c)", salida[ii+sizeof(Uint32)]);
 128                                 printf("]\n");
 129                         }*/
 130                         /* Le aplico el MTF, salteo el tamaño del bloque para que no se pierda. */
 131                         mtf = jacu_mtf(salida+sizeof(Uint32), i+sizeof(Uint32), &z, &z_len);
 132 /*
 133                         printf("MTF Z (len=%d) = [", z_len);
 134                         {
 135                                 int ii;
 136                                 for(ii=0; ii<z_len; ii++)
 137                                         printf("(%c)", z[ii]);
 138                                 printf("]\n");
 139
 140                         }*/
 141                         /* Si me lo piden, aplico ZG. */
 142                         if (zflag) {
 143                                 size_t len;
 144                                 char buff[2];
 145                                 ZG zg;
 146                                 zg_init(&zg);
 147                                 /* TODO HACER LO MISMO QUE EN EL ELSE XXX */
 148                                 for (j = 0; j < i; ++j)
 149                                         if ((len = zg_group(&zg, buff, mtf[j]))) fwrite(buff, 1, len, fp_out);
 150                         } else {
 151                                 /* Guardo el PageSize */
 152                                 fwrite(salida, sizeof(Uint32), 1, fp_out);
 153
 154                                 /* Guardo el Z len y el Z */
 155                                 fwrite(&z_len, sizeof(int), 1, fp_out);
 156                                 fwrite(z, z_len, sizeof(char), fp_out);
 157
 158                                 /* Guardo la salida del MTF */
 159                                 /*printf("Despues de MTF : [");*/
 160                                 for(j=0; j<(i+sizeof(Uint32)); j++) {
 161                                         fputc(mtf[j], fp_out);
 162                         /*              putchar('(');
 163                                         fputc(mtf[j], stdout);
 164                                         putchar(')');*/
 165                                 }
 166                                 /*printf("]\n");*/
 167                         }
 168                         free(mtf);
 169                         free(z);
 170                 }
 171
 172                 /* Limpiando */
 173                 fclose(fp);
 174                 fclose(fp_out);
 175                 bs_destroy(bs);
 176
 177                 /* Comprimo con huffman */
 178                 i = shuff_encode_file("tmp.comp", argv[optind+1], volumesize);
 179
 180                 /* borro el temporal */
 181                 remove("tmp.comp");
 182
 183                 /* Muestro bpb */
 184                 printf("Comprimido a %.04f bpb.\n", get_file_size(argv[optind+1])*8.0/get_file_size(argv[optind]));
 185                 return i;
 186         }
 187
 188         if (dflag == 1) {
 189                 /* Descomprimo */
 190                 FILE *fp_out;
 191                 FILE *fp_in;
 192                 Uint32 block_size, k;
 193                 char *block, *mtf, *orig;
 194                 char *z;
 195                 int z_len;
 196
 197                 shuff_decode_file(argv[optind], "tmp.comp"); /*argv[optind+1]);*/
 198                 fp_in = fopen("tmp.comp", "rb");
 199                 fp_out = fopen(argv[optind+1], "wb");
 200
 201                 while (!feof(fp_in)) {
 202                         block_size = 0;
 203                         fread(&block_size, sizeof(Uint32), 1, fp_in);
 204                         if (block_size > 0) {
 205                                 fread(&z_len, sizeof(int), 1, fp_in);
 206                                 z = malloc(sizeof(char)*z_len);
 207                                 fread(z, z_len, sizeof(char), fp_in);
 208
 209                                 /*printf("MTF Z (len=%d) = [", z_len);
 210                                 {
 211                                         int ii;
 212                                         for(ii=0; ii<z_len; ii++)
 213                                                 printf("(%c)", z[ii]);
 214                                         printf("]\n");
 215
 216                                 }*/
 217
 218                                 block = malloc(block_size*sizeof(char)+sizeof(Uint32));
 219                                 orig = malloc(block_size*sizeof(char));
 220                                 fread(block, block_size+sizeof(Uint32), sizeof(char), fp_in);
 221
 222                                 /*printf("Antes MTF_inv = [");
 223                                 {
 224                                         int ii;
 225                                         for(ii=0; ii<block_size+sizeof(Uint32); ii++)
 226                                                 printf("(%c)", block[ii]);
 227                                         printf("]\n");
 228                                 }*/
 229                                 /* Hago el MTF inverso */
 230                                 mtf = jacu_mtf_inv(z, block, block_size*sizeof(char)+sizeof(Uint32));
 231
 232                                 /*printf("Luego de MTF Inv= [");
 233                                 {
 234                                         int ii;
 235                                         for(ii=0; ii<block_size+sizeof(Uint32); ii++)
 236                                                 printf("(%c)", mtf[ii]);
 237                                         printf("]\n");
 238                                 }*/
 239
 240                                 /* Luego de hacer el MTF inverso ya puedo recuperar el k */
 241                                 memcpy(&k, mtf, sizeof(Uint32));
 242
 243                                 /*printf("Restored : k=%ld\n", k);*/
 244                                 bs_restore(orig, mtf+sizeof(Uint32), k, block_size);
 245
 246                                 fwrite(orig, block_size, sizeof(char), fp_out);
 247                                 free(block);
 248                                 free(orig);
 249                                 free(mtf);
 250                                 free(z);
 251                         }
 252                 }
 253                 fclose(fp_in);
 254                 fclose(fp_out);
 255         }
 256
 257         return 0;
 258 }
 259
 260 long get_file_size(const char* filename)
 261 {
 262         FILE* file;
 263         long  file_size;
 264
 265         if (!(file = fopen(filename, "ab"))) return -1;
 266         file_size = ftell(file);
 267         fclose(file);
 268         return file_size;
 269 }
 270