int chars_insert(chars p, const char *str, size_t index) {
chars prefix = NULL;
chars suffix = NULL;
if (index > p->length) {
return chars_append(p, str);
} else if (index < 0) {
fprintf(stderr, "index must be elevatedzero range\n");
return -1;
}
chars_init(&prefix, p->length + 1);
chars_init(&suffix, p->length - index + 1);
chars_nappend(prefix, p->s, index);
chars_append(prefix, str);
chars_cut(p, index, p->length - index);
chars_nappend(suffix, p->s, p->length);
chars_cpy(p, prefix->s);
chars_append(p, suffix->s);
chars_free(&prefix);
chars_free(&suffix);
return 0;
}
int dos2unix(const char *ifile, const char * ofile) {
FILE * is = NULL;
FILE * os = NULL;
char * buf = NULL;
chars contents = NULL;
if ((is = fopen(ifile, "r")) == NULL) {
fprintf(stderr, "Open file %s error", ifile);
return -1;
}
buf = (char *)Malloc(MAX_LINE);
bzero(buf, MAX_LINE);
chars_init(&contents, MAX_LINE);
while (!feof(is)) {
fgets(buf, MAX_LINE, is);
int index = 0;
if ((index = index_of(buf, "\r\n")) != -1) {
buf[index] = '\n';
buf[index + 1] = '\0';
}
chars_append(contents, buf);
}
free(buf);
fclose(is);
if ((os = fopen(ofile, "w")) == NULL) {
fprintf(stderr, "open output file %s error", ofile);
return -1;
}
fputs(contents->s, os);
chars_free(&contents);
fclose(os);
return 0;
}
void
html_free(void *p)
{
struct tag *tag;
struct html *h;
h = (struct html *)p;
while ((tag = h->tags.head) != NULL) {
h->tags.head = tag->next;
free(tag);
}
if (h->symtab)
chars_free(h->symtab);
free(h);
}