Huffman ya comprime multivolumen, pero aun funciona descompresion de multivolumen...

[z.facultad/75.06/jacu.git] / src / statichuff / statichuff.c

diff --git a/src/statichuff/statichuff.c b/src/statichuff/statichuff.c
index db164d285cf00aab08c84573b7d01e897b19e511..0a3fa0139de82a46e329464bae0c4e4c8059b863 100644 (file)
--- a/src/statichuff/statichuff.c
+++ b/src/statichuff/statichuff.c
@@ -1,8 +1,9 @@
 
 #include "statichuff.h"
+#include "../vfile/vfile.h"
 #include <stdlib.h>
 
-void putbit(char bit, char restart, char flush, FILE *fp)
+void putbit(char bit, char restart, char flush, VFILE *fp)
 {
        static unsigned long int bits_buffer = 0;
        static unsigned char bits_used = 0;     
@@ -10,7 +11,7 @@ void putbit(char bit, char restart, char flush, FILE *fp)
        /* me obligan a emitir el output */
        if ((flush == 1) && (bits_used > 0)) {
                bits_buffer = bits_buffer << ((sizeof(unsigned long int)*8) - bits_used);
-               fwrite(&bits_buffer,sizeof(unsigned long int),1,fp);
+               vfwrite(&bits_buffer,sizeof(unsigned long int),1,fp);
                bits_buffer = 0;
                bits_used = 0;
                return;
@@ -27,7 +28,7 @@ void putbit(char bit, char restart, char flush, FILE *fp)
        
        /* lleno el buffer, escribo */
        if (bits_used == 32) {
-               fwrite(&bits_buffer,sizeof(unsigned long int),1,fp);
+               vfwrite(&bits_buffer,sizeof(unsigned long int),1,fp);
                bits_buffer = 0;
                bits_used = 0;
        }       
@@ -75,7 +76,7 @@ int shuff_scanfreq(char *inputfile, t_freq *freqtable)
        for (i = 0; i < 256; ++i) freqtable[i] = 0;
                
        /* Abrimos el file */
-       if ((fp = fopen(inputfile,"rb")) == NULL) return 0;
+       if ((fp = fopen(inputfile,"r")) == NULL) return 0;
        while (!feof(fp)) {             
                /* Contamos las frecuencias */          
                symbol = fgetc(fp);
@@ -90,7 +91,7 @@ int shuff_scanfreq(char *inputfile, t_freq *freqtable)
        }
        
        fclose(fp);
-       return 1;       
+       return 1;
 }
 
 SHUFFNODE *shuff_buildlist(t_freq *freqtable, int *nonzerofreqs)
@@ -189,25 +190,24 @@ void shuff_buildcodes(SHUFFCODE *table, SHUFFNODE *node, int level, int code)
        }
 }
 
-
-
-int shuff_encode_symbols(t_freq *ftable, SHUFFCODE *ctable, char* inputfile, char *outputfile) {
-
-       FILE *fpsource,*fpdest;
+int shuff_encode_symbols(t_freq *ftable, SHUFFCODE *ctable, char* inputfile, char *outputfile, long volsize)
+{
+       FILE *fpsource;
+       VFILE *fpdest;
        int symbol,i;
        unsigned long int sourcesize;
        char bit;
        SHUFFCODE symbolcode;
                
        /* Abrimos el file */
-       if ((fpsource = fopen(inputfile,"rb")) == NULL) return 0;
-       if ((fpdest = fopen(outputfile,"wb")) == NULL) return 0;
+       if ((fpsource = fopen(inputfile,"r")) == NULL) return 0;
+       if ((fpdest = vfopen(outputfile,"w",volsize)) == NULL) return 0;
                
        /* Guardamos el size el archivo original e inputlist como header */
        fseek(fpsource,0,SEEK_END);
        sourcesize = ftell(fpsource);
-       fwrite(&sourcesize,sizeof(unsigned long int),1,fpdest);
-       fwrite(ftable,sizeof(t_freq),256,fpdest);
+       vfwrite(&sourcesize,sizeof(unsigned long int),1,fpdest);
+       vfwrite(ftable,sizeof(t_freq),256,fpdest);
        
        /* Encodeo */
        fseek(fpsource,0,SEEK_SET);
@@ -227,11 +227,11 @@ int shuff_encode_symbols(t_freq *ftable, SHUFFCODE *ctable, char* inputfile, cha
        /* Hacemos un flush de lo que haya quedado en el buffer de salida */
        putbit(0,0,1,fpdest);
        fclose(fpsource);
-       fclose(fpdest);
+       vfclose(fpdest);
        return 1;       
 }
 
-int shuff_encode_file(char *inputfile, char *outputfile)
+int shuff_encode_file(char *inputfile, char *outputfile, long volsize)
 {
        /* Locals */
        t_freq *freqtable = (t_freq*)malloc(sizeof(t_freq)*256);
@@ -253,7 +253,7 @@ int shuff_encode_file(char *inputfile, char *outputfile)
        /*shuff_printcodes(codetable,freqtable);*/
 
        /* Encodeo byte per byte */
-       shuff_encode_symbols(freqtable,codetable,inputfile,outputfile);
+       shuff_encode_symbols(freqtable,codetable,inputfile,outputfile,volsize);
        
        /* Free up memory baby yeah */
        free(freqtable);
@@ -286,24 +286,24 @@ int shuff_decode_file(char *inputfile, char *outputfile)
        SHUFFNODE *codetree,*currnode;
        t_freq *ftable = (t_freq*)malloc(sizeof(t_freq)*256);
        unsigned long int bytesleft,codebuffer;
-       FILE *fpsource;
+       VFILE *fpsource;
        FILE *fpdest;
        unsigned short int decoded_symbol;
        int bitsleft,freqcount = 0;     
        
        /* Levanto cuantos bytes decodeo y la freq table */
-       if ((fpsource = fopen(inputfile,"rb")) == NULL) return 0;
-       if ((fpdest = fopen(outputfile,"wb")) == NULL) return 0;
-       fread(&bytesleft,sizeof(unsigned long int),1,fpsource);
-       fread(ftable,sizeof(unsigned long int),256,fpsource);   
+       if ((fpsource = vfopen(inputfile,"r",0)) == NULL) return 0;
+       if ((fpdest = fopen(outputfile,"w")) == NULL) return 0;
+       vfread(&bytesleft,sizeof(unsigned long int),1,fpsource);
+       vfread(ftable,sizeof(unsigned long int),256,fpsource);  
        inputlist = shuff_buildlist(ftable, &freqcount);
        codetree = shuff_buildtree(inputlist,freqcount);
        currnode = codetree;
        
-       while (!feof(fpsource) && (bytesleft > 0)) {
+       while (!feof(fpsource->fp) && (bytesleft > 0)) {
                
                /* Leo un buffer de 32 bits */
-               if (fread(&codebuffer,sizeof(unsigned long int),1,fpsource) != 1) continue;
+               if (vfread(&codebuffer,sizeof(unsigned long int),1,fpsource) != 1) continue;
                bitsleft = sizeof(unsigned long int) * 8;
                
                /* Proceso el buffer sacando simbolos hasta que se me agote */
@@ -318,7 +318,7 @@ int shuff_decode_file(char *inputfile, char *outputfile)
                }               
        }
                
-       fclose(fpsource);
+       vfclose(fpsource);
        fclose(fpdest);
        
        /* Free up memory baby yeah */
@@ -327,48 +327,3 @@ int shuff_decode_file(char *inputfile, char *outputfile)
        
        return 1;
 }
-
-int main(int argc, char* argv[])
-{      
-       int cflag = 0;
-       int dflag = 0;
-       int tflag = 0;
-       long int volumesize = 0;
-       int ch;
-                       
-       while ((ch = getopt(argc, argv, "cdt:")) != -1) { 
-                
-               switch (ch) { 
-                       case 'c': cflag = 1; 
-                                         break;
-                       
-                       case 'd': dflag = 1; 
-                                         break; 
-                       
-                       case 't': tflag = 1; 
-                                         volumesize = atoi(optarg);                                      
-                                         break; 
-                       
-                       default: fprintf(stderr, "Usage: %s [-cdt] sourcefile targetfile\n", argv[0]); 
-                                        return(2);
-               }
-       }
-               
-       if ( (argc == 1) || (cflag & dflag) || !(cflag | dflag) || ((argc - optind) < 2) ) {
-               fprintf(stderr, "Usage: %s [-cdt] sourcefile targetfile\n", argv[0]); 
-               if ((tflag == 1) && (volumesize <= 0)) fprintf(stderr,"Error: The volume size must be a non-zero value\n");
-               return (2);             
-       }
-               
-       if (cflag == 1) {
-               /* Comprimo */
-           return shuff_encode_file(argv[optind],argv[optind+1]);
-       }
-       
-       if (dflag == 1) { 
-               /* Descomprimo */
-               return shuff_decode_file(argv[optind],argv[optind+1]);
-       }
-               
-       return 0;
-}