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#include <stdio.h>
#include <stdlib.h>
#include <stdint.h>
#include <string.h>
#include <sys/stat.h>
#include "regex.h"
const char *ANSI_RESET_COLOR = "\033[39m\033[49m";
const char *ANSI_COLOR_PATTERN = "\033[38;2;%d;%d;%dm";
void search_file(char *regex, char *filename) {
FILE* f = fopen(filename, "r");
if (!f) {
fprintf(stderr, "File %s does not exist!\n", filename);
exit(2);
}
struct stat fstats;
int result = fstat(fileno(f), &fstats);
if (result) {
fprintf(stderr, "Could not find the size of the file %s\n", filename);
exit(2);
}
size_t file_length = fstats.st_size;
char *contents = malloc((file_length + 1) * sizeof(char));
fread(contents, file_length, sizeof(char), f);
contents[file_length] = '\0';
char *brkt;
for (char *line = strtok_r(contents, "\n", &brkt); line; line = strtok_r(NULL, "\n", &brkt)) {
if (!line) {
puts("\n");
}
else {
range_t *result = regexp_match(regex, line);
if (result) {
char *to_print = calloc(strlen(line) + 1 + (strlen(ANSI_COLOR_PATTERN) + 3) + strlen(ANSI_RESET_COLOR), sizeof(char));
strncpy(to_print, line, result->start);
snprintf(to_print + result->start, strlen(ANSI_COLOR_PATTERN) + 3, ANSI_COLOR_PATTERN, 0, 128, 0);
strncat(to_print, line + result->start, result->end - result->start);
strcat(to_print, ANSI_RESET_COLOR);
strcat(to_print, line + result->end);
printf("%s\n", to_print);
}
free(result);
}
}
free(contents);
fclose(f);
}
int main(int argc, char *argv[]) {
if (argc < 3) {
fprintf(stderr, "USAGE: %s <regexp> filepaths...\n", argv[0]);
exit(1);
}
char *regex = argv[1];
for (size_t i = 2; i < argc; i++) {
search_file(regex, argv[i]);
}
}