Problem - Kevin Tafuro

Discussion
This function spc_words2bin() uses the wordlist.h file provided on the book’s web
site, and it can be changed as described in Recipe 4.7.
#include
#include
#include
#include "wordlist.h"
#define BITS_IN_LIST 11
#define MAX_WORDLEN 4
unsigned char *spc_words2bin(unsigned char *str, size_t *outlen) {
int cmp, i;
size_t bitsinword, curbits, needed, reslen;
unsigned int ix, min, max;
unsigned char *p = str, *r, *res, word[MAX_WORDLEN + 1];
curbits = reslen = *outlen = 0;
if(!(r = res = (unsigned char *)malloc((strlen(str) + 1) / 2))
return 0;
memset(res, 0, (strlen(str) + 1) / 2);
for (;;) {
while (isspace(*p)) p++;
if (!*p) break;
/* The +1 is because we expect to see a space or a NULL after each and every
* word; otherwise, there's a syntax error.
*/
for (i = 0; i < MAX_WORDLEN + 1; i++) {
if (!*p || isspace(*p)) break;
if (islower(*p)) word[i] = *p++ - ' ';
else if (isupper(*p)) word[i] = *p++;
else {
free(res);
return 0;
}
}
if (i = = MAX_WORDLEN + 1) {
free(res);
return 0;
}
word[i] = 0;
min = 0;
max = (1