X-Git-Url: https://git.llucax.com/z.facultad/75.06/jacu.git/blobdiff_plain/93e223352f8b393565b9150698306d7b20504312..d25b453b6d6096981cc559ece795812d035a7bf9:/src/statichuff/statichuff.c

diff --git a/src/statichuff/statichuff.c b/src/statichuff/statichuff.c
index b1896e0..79fcdce 100644
--- 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 +253,12 @@ 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);
+	free(inputlist);	
+	free(codetable);
 	
 	return 1;
 }
@@ -281,24 +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 (!vfeof(fpsource) && (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 */
@@ -313,53 +318,12 @@ int shuff_decode_file(char *inputfile, char *outputfile)
 		}		
 	}
 		
-	fclose(fpsource);
+	vfclose(fpsource);
 	fclose(fpdest);
 	
-	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]);
-	}
+	/* Free up memory baby yeah */
+	free(ftable);
+	free(inputlist);
 	
-	if (dflag == 1) { 
-		/* Descomprimo */
-		return shuff_decode_file(argv[optind],argv[optind+1]);
-	}
-		
-	return 0;
+	return 1;
 }