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         HUFF_STATE *shuff;
  26
  27         while ((ch = getopt(argc, argv, "cdzt:q:")) != -1) {
  28
  29                 switch (ch) {
  30                         case 'c': cflag = 1;
  31                                           break;
  32
  33                         case 'd': dflag = 1;
  34                                           break;
  35
  36                         case 'z': zflag = 1;
  37                                           break;
  38
  39                         case 't': tflag = 1;
  40                                 volumesize = atol(optarg);
  41                                 break;
  42
  43                         case 'q': qflag = 1;
  44                                 switch (atoi(optarg))
  45                                 {
  46                                         case 0: pagesize = 1024; /* 1K */
  47                                                 break;
  48                                         case 1: pagesize = 2048; /* 2K */
  49                                                 break;
  50                                         case 2: pagesize = 4096; /* 4K */
  51                                                 break;
  52                                         case 3: pagesize = 8192; /* 8K */
  53                                                 break;
  54                                         case 4: pagesize = 16384; /* 16K */
  55                                                 break;
  56                                         case 5: pagesize = 32768; /* 32K */
  57                                                 break;
  58                                         case 6: pagesize = 65536; /* 64K */
  59                                                 break;
  60                                         case 7: pagesize = 131072; /* 128K */
  61                                                 break;
  62                                         case 8: pagesize = 262144; /* 256K */
  63                                                 break;
  64                                         case 9: pagesize = 524288; /* 512K */
  65                                                 break;
  66                                         default: pagesize = 0; /* error */
  67                                 }
  68                                 break;
  69
  70                         default: fprintf(stderr, "Usage: %s [-cdpt] sourcefile targetfile\n", argv[0]);
  71                                          return(2);
  72                 }
  73         }
  74
  75         if ( (argc == 1) || (cflag & dflag) || !(cflag | dflag) || ((argc - optind) < 2) ) {
  76                 fprintf(stderr, "Usage: %s [-cdt] sourcefile targetfile\n", argv[0]);
  77                 return (3);
  78         }
  79         if ((tflag) && (volumesize <= 0l)) {
  80                 fprintf(stderr,"Error: The volume size must be a non-zero value\n");
  81                 return (4);
  82         }
  83         if ((qflag) && (pagesize <= 1u)) {
  84                 fprintf(stderr,"Error: El nivel de compresión debe ser entre 0 (menor) y 9 (mayor).\n");
  85                 return (5);
  86         }
  87
  88         if (cflag == 1) {
  89                 /* Comprimo */
  90                 /* No me gusta el tmpfile ... es para probar como anda todo junto */
  91                 FILE *fp, *fp_out;
  92                 Uint32 i, j, total, k;
  93                 char *mtf;
  94                 char *salida, *data, c;
  95                 char *z;
  96                 int z_len;
  97
  98                 data = malloc(sizeof(char)*pagesize);
  99                 /* Reservo lugar tambien para guardar el k y el tamaño  */
 100                 salida = malloc(sizeof(char)*pagesize+sizeof(Uint32)*2);
 101                 bs = bs_create(pagesize);
 102
 103                 fp = fopen(argv[optind], "rb");
 104                 fp_out = fopen("tmp.comp", "wb");
 105
 106                 /*c = fgetc(fp);*/
 107                 total = 0;
 108                 while (!feof(fp)) {
 109                         i = 0;
 110                         while ((!feof(fp)) && (i < pagesize)) {
 111                                 data[i++] = fgetc(fp);
 112                                 total++;
 113                         }
 114
 115                         /* Saco un EOF que lee de mas */
 116                         if (i<pagesize) i--;
 117
 118                         /* Hago el BS */
 119                         bs_solve(data, salida, bs, &k, i);
 120
 121                         /*printf("BS k=%ld\n", *(Uint32 *)(salida+sizeof(Uint32)));
 122                         printf("PageSize = %ld\n", *(Uint32 *)salida);
 123
 124                         printf("Antes de MTF = %ld [", i);
 125                         {
 126                                 int ii;
 127                                 for(ii=0; ii<(i+sizeof(Uint32)); ii++)
 128                                         printf("(%c)", salida[ii+sizeof(Uint32)]);
 129                                 printf("]\n");
 130                         }*/
 131                         /* Le aplico el MTF, salteo el tamaño del bloque para que no se pierda. */
 132                         mtf = jacu_mtf(salida+sizeof(Uint32), i+sizeof(Uint32), &z, &z_len);
 133 /*
 134                         printf("MTF Z (len=%d) = [", z_len);
 135                         {
 136                                 int ii;
 137                                 for(ii=0; ii<z_len; ii++)
 138                                         printf("(%c)", z[ii]);
 139                                 printf("]\n");
 140
 141                         }*/
 142                         /* Si me lo piden, aplico ZG. */
 143                         if (zflag) {
 144                                 size_t len;
 145                                 char buff[2];
 146                                 ZG zg;
 147                                 zg_init(&zg);
 148                                 /* TODO HACER LO MISMO QUE EN EL ELSE XXX */
 149                                 for (j = 0; j < i; ++j)
 150                                         if ((len = zg_group(&zg, buff, mtf[j]))) fwrite(buff, 1, len, fp_out);
 151                         } else {
 152                                 /* Guardo el PageSize */
 153                                 fwrite(salida, sizeof(Uint32), 1, fp_out);
 154
 155                                 /* Guardo el Z len y el Z */
 156                                 fwrite(&z_len, sizeof(int), 1, fp_out);
 157                                 fwrite(z, z_len, sizeof(char), fp_out);
 158
 159                                 /* Guardo la salida del MTF */
 160                                 /*printf("Despues de MTF : [");*/
 161                                 for(j=0; j<(i+sizeof(Uint32)); j++) {
 162                                         fputc(mtf[j], fp_out);
 163                         /*              putchar('(');
 164                                         fputc(mtf[j], stdout);
 165                                         putchar(')');*/
 166                                 }
 167                                 /*printf("]\n");*/
 168                         }
 169                         free(mtf);
 170                         free(z);
 171                 }
 172
 173                 /* Limpiando */
 174                 fclose(fp);
 175                 fclose(fp_out);
 176                 bs_destroy(bs);
 177
 178                 /* Comprimo con huffman */
 179                 if ((shuff = shuff_init_encoder_byfile("tmp.comp", argv[optind+1], volumesize)) == NULL) return 1;
 180                 shuff_encode_file(shuff);
 181                 shuff_deinit_encoder(shuff);
 182                 free(shuff);
 183
 184                 /* borro el temporal */
 185                 remove("tmp.comp");
 186
 187                 /* Muestro bpb */
 188                 printf("Comprimido a %.04f bpb.\n", get_file_size(argv[optind+1])*8.0/get_file_size(argv[optind]));
 189                 return 0;
 190         }
 191
 192         if (dflag == 1) {
 193                 /* Descomprimo */
 194                 FILE *fp_out;
 195                 FILE *fp_in;
 196                 Uint32 block_size, k;
 197                 char *block, *mtf, *orig;
 198                 char *z;
 199                 int z_len;
 200
 201                 if ((shuff = shuff_init_decoder(argv[optind],"tmp.comp")) == NULL) return 1;
 202                 shuff_decode_file(shuff);
 203                 shuff_deinit_decoder(shuff);
 204                 free(shuff);
 205
 206                 fp_in = fopen("tmp.comp", "rb");
 207                 fp_out = fopen(argv[optind+1], "wb");
 208
 209                 while (!feof(fp_in)) {
 210                         block_size = 0;
 211                         fread(&block_size, sizeof(Uint32), 1, fp_in);
 212                         if (block_size > 0) {
 213                                 fread(&z_len, sizeof(int), 1, fp_in);
 214                                 z = malloc(sizeof(char)*z_len);
 215                                 fread(z, z_len, sizeof(char), fp_in);
 216
 217                                 /*printf("MTF Z (len=%d) = [", z_len);
 218                                 {
 219                                         int ii;
 220                                         for(ii=0; ii<z_len; ii++)
 221                                                 printf("(%c)", z[ii]);
 222                                         printf("]\n");
 223
 224                                 }*/
 225
 226                                 block = malloc(block_size*sizeof(char)+sizeof(Uint32));
 227                                 orig = malloc(block_size*sizeof(char));
 228                                 fread(block, block_size+sizeof(Uint32), sizeof(char), fp_in);
 229
 230                                 /*printf("Antes MTF_inv = [");
 231                                 {
 232                                         int ii;
 233                                         for(ii=0; ii<block_size+sizeof(Uint32); ii++)
 234                                                 printf("(%c)", block[ii]);
 235                                         printf("]\n");
 236                                 }*/
 237                                 /* Hago el MTF inverso */
 238                                 mtf = jacu_mtf_inv(z, block, block_size*sizeof(char)+sizeof(Uint32));
 239
 240                                 /*printf("Luego de MTF Inv= [");
 241                                 {
 242                                         int ii;
 243                                         for(ii=0; ii<block_size+sizeof(Uint32); ii++)
 244                                                 printf("(%c)", mtf[ii]);
 245                                         printf("]\n");
 246                                 }*/
 247
 248                                 /* Luego de hacer el MTF inverso ya puedo recuperar el k */
 249                                 memcpy(&k, mtf, sizeof(Uint32));
 250
 251                                 /*printf("Restored : k=%ld\n", k);*/
 252                                 bs_restore(orig, mtf+sizeof(Uint32), k, block_size);
 253
 254                                 fwrite(orig, block_size, sizeof(char), fp_out);
 255                                 free(block);
 256                                 free(orig);
 257                                 free(mtf);
 258                                 free(z);
 259                         }
 260                 }
 261                 fclose(fp_in);
 262                 fclose(fp_out);
 263         }
 264
 265         return 0;
 266 }
 267
 268 long get_file_size(const char* filename)
 269 {
 270         FILE* file;
 271         long  file_size;
 272
 273         if (!(file = fopen(filename, "ab"))) return -1;
 274         file_size = ftell(file);
 275         fclose(file);
 276         return file_size;
 277 }