#include "vocal.h"

char* getline (FILE *fp)  {
	char ch = 0;
	char *line = NULL;
	unsigned int size=0;

	while (ch!='\n' && ch!='\r' && !feof(fp))  {
		ch = fgetc(fp);
		line = (char*) realloc(line, ++size);
		line[size-1]=ch;
	}

	if (size)
		line[size]=0;

	if (line[size-1] == '\n' || line[size-1] == '\r')
		line[size-1]=0;

	return line;
}

char** preg_match (char *regex, char* s, int *size)  {
	char **match = NULL;
	regex_t re;
	regmatch_t off;
	*size=0;

	if (regcomp(&re,regex,REG_EXTENDED)!=0)
		return match;
				 
	for (; !regexec(&re, s, 1, &off, 0); s += off.rm_eo)  {
		match = (char**) realloc(match, (++(*size))*sizeof(char*));
		match[*size-1] = (char*) malloc(BUFSIZ);
		memset (match[*size-1], 0x0, BUFSIZ);
		memcpy (match[*size-1], s + off.rm_so, off.rm_eo - off.rm_so);
	}

	regfree(&re);
	return match;
}

double ABS (double x)  { return (x >= 0) ? x : -x; }