Convert FR escaped strings to hex

fr_unoctal.c

#include <unistd.h>
#include <stdio.h>
#include <string.h>

int main(int argc, char **argv)
{
	unsigned int	verbose = 0;
	unsigned int	octal = 0;

	char		*p,*q;
	char		strbuff[254];
	size_t		s;
	unsigned int	octbuff[3];
	unsigned int	*power;

	power = octbuff;

	if (argc > 1 && argv[1][0] == '-' && argv[1][1] == 'v')
		verbose = 1;

	printf("0x");	
	while ((s = read(STDIN_FILENO, strbuff, sizeof(strbuff))) > 0) {
		p = strbuff;	
		q = p + s;

		while (q - p) {
			if (p[0] == '\\') {
				power = octbuff;
				octal = 1;
			} else if (octal) {
				*power++ = ((int) p[0]) - 48;	

				if (power - octbuff == 3) {
					if (verbose)
						printf("%c%c%c%c\t>\t", '\\',  octbuff[0] + 48, octbuff[1] + 48, octbuff[2] + 48);

					printf("%02x", (octbuff[0] * 8 * 8) + (octbuff[1] * 8) + octbuff[2]);	

					if (verbose)
						printf("\n");

					power = octbuff;
					octal = 0;
				}
			}
			else {
				if (verbose)
					printf("%c\t>\t", p[0]);

				printf("%02x", (int) p[0]);

				if (verbose)
					printf("\n");
			}

			p++;
		}
	}

	printf("\n");
	
	return 0;
}