#include <stdio.h>
#include <unistd.h>
-long get_file_size(const char* filename);
+long fsize(const char* filename);
typedef struct _flags_ {
int cflag;
int mflag;
} t_Flags;
-int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumensize, t_Flags *flags, char *staticmodel);
+int comprimir(char *src, char *dst, Uint32 pagesize, Uint32 volumesize, t_Flags *flags, char *staticmodel);
int descomprimir(char *src, char *dst);
int main(int argc, char* argv[])
return 0;
}
-long get_file_size(const char* filename)
+long fsize(const char* filename)
{
FILE* file;
long file_size;
unsigned char *z;
int z_len;
+ /* Abrimos el archivo a comprimir y encodeamos bloques */
+ if ((fp = fopen(src, "rb")) == NULL) return 1;
+
/* Preparo el compresor huffman */
if ((shuff = shuff_init_encoder_bychunk(dst, volumesize*1024)) == NULL) return 1;
if (flags->mflag == 1) shuff_loadmodel(shuff, staticmodel);
salida = malloc(sizeof(unsigned char)*pagesize+sizeof(Uint32));
bs = bs_create(pagesize);
- /* Abrimos el archivo a comprimir y encodeamos bloques */
- fp = fopen(src, "rb");
-
/* Guardamos el pagesize como header (huffencoded) */
shuff_scanfreq_chunk(shuff,(char*)&pagesize,sizeof(Uint32));
total = 0;
while (!feof(fp)) {
i = 0;
- while ((!feof(fp)) && (i < pagesize)) {
- data[i++] = fgetc(fp);
- total++;
- }
+ i = bs_readblock(fp, data, pagesize);
+ total += i;
- /* Saco un EOF que lee de mas */
- if (i<pagesize) i--;
/* Aplico BS guardando su resultado + el K en salida */
bs_solve(data, salida, bs, &k, i);
Uint32 len;
unsigned char buff[2];
Uint32 total_size = i + sizeof(Uint32);
- ZG zg;
- /* Guardo la salida del MTF con ceros agrupados (ZG) */
+ ZG zg;
+ /* Guardo la salida del MTF con ceros agrupados (ZG) */
zg_init(&zg);
for (j = 0; j < total_size; ++j)
if ((len = zg_group(&zg, buff, mtf[j])))
/* Flusheo ultimo zgrouping */
if ((len = zg_group_finish(&zg,buff)))
- shuff_scanfreq_chunk(shuff, buff, len);
+ shuff_scanfreq_chunk(shuff, buff, len);
} else {
- /* Comprimo la salida del MTF */
- shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32));
+ /* Comprimo la salida del MTF */
+ shuff_scanfreq_chunk(shuff,mtf,i+sizeof(Uint32));
}
free(mtf);
free(z);
}
/* Limpiando */
- fclose(fp);
+ if (fclose(fp)) fprintf(stderr, "Error al cerrar archivo de entrada!\n");
bs_destroy(bs);
+ free(data);
+ free(salida);
/* Comprimo con Huffman */
shuff_encode_file(shuff);
free(shuff);
/* Muestro bpb */
- printf("%s: %.04f bit/byte.\n", dst, get_file_size(dst)*8.0f/get_file_size(src));
+ printf("%s: %.04f bits/byte.\n", dst, vfsize(dst)*8.0f/fsize(src));
return 0;
}
{
/* Descomprimo */
FILE *fp_out;
- Uint32 block_size = 0,zgungrouped = 0, k;
+ Uint32 block_size = 0, k;
unsigned char *block, *mtf, *orig;
- unsigned char *z, *zgbuffer;
- int zgmoved = 0,z_len=0,moredata = 0,decoded = 0;
- unsigned char use_zg = 0,zgbyte = 0,retbytes = 0;
+ unsigned char *z;
+ int z_len=0,moredata = 0,decoded = 0;
+ unsigned char use_zg = 0,retbytes = 0;
HUFF_STATE *shuff;
- ZG zg;
/* Inicializo el descompresor */
if ((shuff = shuff_init_decoder(src, NULL)) == NULL) return 1;
/* Descomprimo byte que indica si se usa ZG */
if (!(moredata = shuff_decode_chunk(shuff, &use_zg, 1, &decoded))) return 1;
- if (use_zg) zg_init(&zg);
/* Creo buffers */
- zgbuffer = malloc(sizeof(unsigned char)*256);
block = malloc(block_size*sizeof(unsigned char)+sizeof(Uint32));
orig = malloc(block_size*sizeof(unsigned char));
moredata = shuff_decode_chunk(shuff,z,z_len,&decoded);
/* Veo si se uso Zero Grouping para comprimir */
- if (use_zg) {
+ if (use_zg) {
+ ZG zg;
+ unsigned char zgbuffer[255];
+ unsigned char zgbyte = 0;
+ int zgmoved = 0;
+ Uint32 zgungrouped = 0;
/* Desagrupo bytes hasta completar la pagina or End of Source File */
- zgungrouped = 0;
- do {
+ zg_init(&zg);
+ do {
/* Levanto un byte zerogrouped y lo paso por el zg_ungroup */
zgmoved = 0;
- moredata = shuff_decode_chunk(shuff,&zgbyte,1,&decoded);
+ moredata = shuff_decode_chunk(shuff,&zgbyte,1,&decoded);
retbytes = zg_ungroup(&zg,zgbuffer,zgbyte);
- /* Muevo del zgbuffer a mi bloque lo que corresponda */
- while ((zgmoved < retbytes) && (zgungrouped < block_size+sizeof(Uint32))) {
- block[zgungrouped++] = zgbuffer[zgmoved++];
+ /* Muevo del zgbuffer a mi bloque lo que corresponda */
+ while ((zgmoved < retbytes) && (zgungrouped < block_size+sizeof(Uint32))) {
+ block[zgungrouped++] = zgbuffer[zgmoved++];
}
} while ((moredata) && (zgungrouped < block_size+sizeof(Uint32)));
/* Leo un byte mas (un 0 seguro) y zg_ungroup cambiara su estado */
moredata = shuff_decode_chunk(shuff,&zgbyte,1,&decoded);
zg_ungroup(&zg,zgbuffer,zgbyte);
- }
+ }
/* Normalizo variables para continuar en common code */
- decoded = zgungrouped;
+ decoded = zgungrouped;
}
else {
/* Levanto una salida de MTF */
moredata = shuff_decode_chunk(shuff,block,block_size+sizeof(Uint32),&decoded);
}
- /* Le aplico MTF inverso a la salida de MTF levantada previamente */
+ /* Le aplico MTF inverso a la salida de MTF levantada previamente */
mtf = jacu_mtf_inv(z, block, decoded);
/* Ya tengo la salida del BS, tonces levanto su K */
fwrite(orig, decoded - sizeof(Uint32), sizeof(unsigned char), fp_out);
free(mtf);
- free(z);
+ free(z);
}
else return 1;
- } while (moredata);
+ } while (moredata);
/* Close up files and free mem */
fclose(fp_out);
free(block);
free(orig);
- free(zgbuffer);
-
+
/* Shutdown Huffman */
shuff_deinit_decoder(shuff);
free(shuff);
projects / z.facultad / 75.06 / jacu.git / blobdiff