/* * This program is free software; you can redistribute it and/or modify * it under the terms of the GNU General Public License as published by * the Free Software Foundation; either version 2 of the License, or * (at your option) any later version. * * This program is distributed in the hope that it will be useful, * but WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the * GNU General Public License for more details. * * You should have received a copy of the GNU General Public License * along with this program; if not, write to the Free Software * Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA 02111-1307, USA. */#include <stdio.h>#include <stdlib.h>#include <string.h>#include "room_reader.h"/* * This is going to read the file character by character, growing the buffer to * accomodate the data. Once the buffer is done reading (hits the delimiter) it * flushes the buffer to our array for storage. */int read_room_descriptions(char *rooms_filename, char **room_descriptions) { char *buffer_a, *buffer_b, character; int buffer_size = DEFAULT_BUFFER_SIZE, room_number = 0, buffer_strlen; FILE *rooms_file; //we've failed for some reason, return appropriately if ((rooms_file = fopen(rooms_filename,"r")) == NULL) return -1; //start our buffer buffer_a = memset(malloc(buffer_size * sizeof(char)),'\0',1); do { //check to see if we have enough space, if we don't, grow the buffer if (strlen(buffer_a) >= (buffer_size - 1)) { buffer_b = buffer_a; buffer_size *= 2; buffer_a = memset(malloc(buffer_size * sizeof(char)),'\0',1); strcpy(buffer_a,buffer_b); free(buffer_b); } //get a character if (((character = fgetc(rooms_file)) != EOF) && (character != DELIMETER)) { //no error and no delimeter, add it to the buffer buffer_strlen = strlen(buffer_a); buffer_a[buffer_strlen] = character; buffer_a[buffer_strlen + 1] = '\0'; } else { //we have an error or the delimeter, flush the buffer room_descriptions[room_number] = buffer_a; buffer_size = DEFAULT_BUFFER_SIZE; buffer_a = memset(malloc(buffer_size * sizeof(char)),'\0',1); //increment and leave if we've met our room limit room_number++; if (room_number >= MAX_ROOMS) return room_number; } } while (!ferror(rooms_file)); //here we met an EOF or error before reaching our room limit return room_number;}int main(int argc, char **argv) { //test case char *filename = "rooms.txt"; char **room_descriptions; int room_count,i; room_descriptions = malloc(MAX_ROOMS * sizeof(void)); room_count = read_room_descriptions(filename,room_descriptions); for (i = 0;i < room_count;i++) { printf("%s\n",room_descriptions[i]); } return 0;}