chat_application/message_helpers.c

#include <easysock.h>

#include "message_helpers.h"

char* fetch_from_string(char* message, char* indicator) {

	char* message_copy = malloc(strlen(message));
	strcpy(message_copy,message);

        char* token = malloc (sizeof(char) * strlen(message_copy));

	char* string_to_search = malloc(strlen(indicator) + 1);
	strcpy(string_to_search,indicator);
	strcat(string_to_search,":");
        token = strtok(message_copy," r\n");
	while (strcmp(token,string_to_search) != 0) {
		token = strtok(NULL," \r\n");
		if (token == NULL) {
			return NULL;
		}
	}
        token = strtok(NULL," \r\n");
        return token;

}

char* fetch_message_string(char* message) {
	int num_of_terminators;

	char* start = strstr(message,"START_OF_MESSAGE");
	if (start == NULL) {
		return NULL;
	}
	int start_index = start - message;
	start_index += strlen("START_OF_MESSAGE");

	while (*(message + start_index) == '\n' || *(message + start_index) == '\r') {
		start_index++;
	}
	
	char* end = strstr(message,"END_OF_MESSAGE");
	if (end == NULL) {
		return NULL;
	}
	int end_index = end - message;

	if (*(message + end_index-2) = '\r') {
		num_of_terminators = 2;
	} else {
		num_of_terminators = 1;
	}

	end_index -= num_of_terminators;

	int message_length = end_index - start_index;
	char* message_string = malloc(message_length + 2);

	printf("Message length is %d\n",message_length);

	for (int i=0; i<message_length; i++) { /* The reason the upper-bound is message_length-1 is because the last 
						character is a new-line, which the user would not have typed. */

		*(message_string + i) = *(message + start_index + i);
		printf("%c",*(message_string + i));
	}

	strcat(message_string,"\0");

//	printf("%s\n",message_string);

//	*(message_string + (message_length - num_of_terminators)) = '\0';
	return message_string;
}