utils.c

/* Misc functions - strings etc */
#include <unistd.h>
#include <stdlib.h>
#include <string.h>
#include <sys/stat.h>

#include "utils.h"

/* FIXME: vasprintf is a GNU extension, so it maybe
 * has to be rewritten in platform-independent way ?
 */
char *make_string(const char *template, ...)
{
	va_list ap;
	char *buffer;

	va_start(ap, template);
	vasprintf(&buffer, template, ap);
	va_end(ap);

	return buffer;
}

void add_to_string(char **string, char *add)
{
	int length = (string && *string) ? strlen(*string) : 0;

	*string = realloc(*string, length + strlen(add) + 1);
	memcpy((char *)*string + length, add, strlen(add) + 1);
}

void add_pattern_to_string(char **string, const char *template,
			   ...)
{
	va_list ap;
	char *buffer;

	va_start(ap, template);
	vasprintf(&buffer, template, ap);
	va_end(ap);

	add_to_string(string, buffer);

	if(buffer)
	free(buffer);
}

int file_exists_and_normal(char *filename)
{
	struct stat status;
	int result = !stat(filename, &status);

	if(result && !S_ISREG(status.st_mode) && !S_ISLNK(status.st_mode))
	result = FALSE;

	if(result && access(filename, R_OK)) {
	result = FALSE;
	}

	return result;
}

char *file_read_string(FILE *file)
{
	char *string = NULL;
	int max_length = 0;
	int length = 0;

	while(!feof(file)){
		int current = fgetc(file);

		if(current == EOF || current == '\n')
			break;

		if(length == max_length){
			max_length += 1024;
			string = realloc(string, max_length + 1);
		}
		
		string[length] = current;
		string[length + 1] = '\0';
	
		length ++;
	}

	/* FIXME: memory allocated is larger than string length here */
	/* But it will be freed, so it is not critical */

	return string;
}