#include "stdafx.h"

char *trimwhitespace(char *str)
{
	char *end;

	// Trim leading space
	while (isspace((unsigned char)*str)) str++;

	if (*str == 0)  // All spaces?
		return str;

	// Trim trailing space
	end = str + strlen(str) - 1;
	while (end > str && isspace((unsigned char)*end)) end--;

	// Write new null terminator
	*(end + 1) = 0;

	return str;
}

char *readLine(FILE *file) {

	if (file == NULL) {
		printf("\nError: file pointer is null.");
		exit(1);
	}

	int maximumLineLength = 128;
	char *lineBuffer = (char *)malloc(sizeof(char) * maximumLineLength);

	if (lineBuffer == NULL) {
		printf("\nError allocating memory for line buffer.");
		exit(1);
	}

	char ch = getc(file);
	int count = 0;

	while ((ch != '\n') && (ch != EOF)) {
		if (count == maximumLineLength) {
			maximumLineLength += 128;
			lineBuffer = (char *)realloc(lineBuffer, maximumLineLength);
			if (lineBuffer == NULL) {
				printf("\nError reallocating space for line buffer.");
				exit(1);
			}
		}
		lineBuffer[count] = ch;
		count++;

		ch = getc(file);
	}

	lineBuffer[count] = '\0';
	if (count > 0)
		return lineBuffer;
	else
		return NULL;
}