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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <errno.h>
#include "config.h"
#include "BHeap.h"
#include "FHeap.h"
#include "BinHeap.h"
#include "PLList.h"
#include "Huffman.h"
#include "numbers.h"
void exception(int e, char *msg)
{
cerr << msg << endl;
exit(-1);
}
PriorityList *newlist(int method)
{
switch (method) {
case 0:
return new BinHeap;
break;
case 1:
return new BHeap;
break;
case 2:
return new FHeap;
break;
case 3:
return new PLList;
break;
default:
cerr << _("Unknow priority list type: ") << method << endl;
exit(-1);
}
}
void Count(FILE * strm, PriorityList * P)
{
int tab[256], i;
char t[2];
if (!strm) {
cerr << _("Error opening file (") << strerror(errno) << ")\n";
exit(-1);
}
for (i = 0; i < 256; i++) {
tab[i] = 0;
}
while ((i = getc(strm)) != EOF) {
tab[i]++;
}
for (i = 0; i < 256; i++) {
if (tab[i]) {
t[0] = i;
t[1] = 0;
HInsert(P, tab[i], t);
}
}
}
void ReadDic(FILE * strm, PriorityList * P)
{
char t[1024], *f, *word, *p;
int valid, freq;
if (!strm) {
cerr << _("Error opening file (") << strerror(errno) << ")\n";
exit(-1);
}
while (fgets(t, 1024, strm)) {
if (!(f = strchr(t, ':'))) {
cerr << _("Bad dictionnary structure. See doc/README.en (missing : separator)") << endl;
exit(-1);
}
*(f++) = '\0';
word = t;
while (*word == ' ') {
word++;
}
p = word + strlen(word) - 1;
while (*p == ' ') {
*(p--) = '\0';
}
if (!strlen(word)) {
cerr << _("Bad dictionnary structure. See doc/README.en (missing word)") << endl;
exit(-1);
}
while (*f == ' ') {
f++;
}
p = f + strlen(f) - 1;
while ((*p == ' ') || (*p == '\n')) {
*(p--) = '\0';
}
if (!strlen(f)) {
cerr << _("Bad dictionnary structure. See doc/README.en (missing frequency)") << endl;
exit(-1);
}
freq = char_to_number(f, &valid);
if (!valid) {
cerr << _("Error: \"") << f << _("\" is not a valid number.") << endl;
exit(-1);
}
HInsert(P, freq, word);
}
}
void Usage(void)
{
cerr << _("Huffman [{-f|-i} file] {type}") << endl;
cerr << _("Huffman -h") << endl;
cerr << _("By Nicolas Noble (nicolas@nobis-crew.org).") << endl;
cerr << _("This will encode the input file with the Huffman code") << endl;
cerr << _("using the priority list defined by type.") << endl;
cerr << _("Type is a number taken from this list:") << endl;
cerr << _(" 0 : Binary Heap (default)") << endl;
cerr << _(" 1 : Binomial Heap") << endl;
cerr << _(" 2 : Fibonacci Heap") << endl;
cerr << _(" 3 : Sorted chained list") << endl;
cerr << _("-f file means that you specify a dictionnary file which is") << endl;
cerr << _(" structured as described into the README file.") << endl;
cerr << _("-i file means that you specify a file to encode. It will") << endl;
cerr << _(" built a quiet dumb dictionnary.") << endl;
cerr << _("By default, a dictionnary will be built from stdin.") << endl;
cerr << _("-h prints this help and exit.") << endl;
exit(0);
}
int main(int argc, char **argv)
{
PriorityList *P;
HTree *H;
int method = -1, readm = -1;
char *filename = NULL;
while (--argc) {
argv++;
if ((*argv)[0] == '-') {
if (strlen(*argv) != 2) {
cerr << _("Unknow option: ") << *argv << endl;
Usage();
}
switch ((*argv)[1]) {
case 'h':
Usage();
break;
case 'i':
if (readm != -1) {
cerr << _("-i and -f options are exclusive") << endl;
Usage();
}
readm = 1;
filename = *(++argv);
argc--;
break;
case 'f':
if (readm != -1) {
cerr << _("-i and -f options are exclusive") << endl;
Usage();
}
readm = 2;
filename = *(++argv);
argc--;
break;
}
} else {
if ((strlen(*argv) != 1) || (((*argv)[0] < '0' || (*argv)[0] > '3'))) {
cerr << _("Unknow priority list type: ") << *argv << endl;
Usage();
}
if (method != -1) {
cerr << _("Extra command: ") << *argv << endl;
Usage();
}
method = (*argv)[0] - '0';
}
}
if (method == -1)
method = 0;
P = newlist(method);
switch (readm) {
case -1:
Count(stdin, P);
break;
case 1:
if (!filename)
cerr << _("-i needs a filename") << endl;
Count(fopen(filename, "r"), P);
break;
case 2:
if (!filename)
cerr << _("-f needs a filename") << endl;
ReadDic(fopen(filename, "r"), P);
break;
default:
cerr << _("Internal error.") << endl;
exit(-1);
}
H = Coder(P);
delete P;
H->Trace(cout);
return 0;
}
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