// string.c
// Author: Josh Holtrop
// Created: 02/26/04
// Implements string functions

#include "string.h"
#include "asmfuncs.h"

char *strcat(char *dest, char *src)
{
	strcpy(dest+strlen(dest), src);
	return dest;
}


//Splits a string into multiple strings by turning all characters
// equal to delim into null values (string termination character)
//Returns the number of strings after the split, 1 if no delim chars
int	string_split(char *str, char delim)
{
	if (strlen(str) < 1)
		return 0;	//empty string
	int count = 1;
	for (; *str; str++)
	{
		if (*str == delim)
		{
			count++;
			*str = 0;
		}
	}
	return count;
}


//Advances a char pointer to the byte after the current string's
// null-terminating character
//Useful after calling string_split()
//Returns a pointer to the following string
char	*string_advance(char *str)
{
	for (; *str; str++);
	return str+1;
}


void	rtrim(char *str)
{
	str += strlen(str);	//now points to the null character at the end of the string
	str--;
	for (;;)
	{
		if ((*str == ' ') || (*str == '\t') || (*str == '\n'))
			*str-- = 0;
		else
			break;
	}
}


char	*ucase(char *str)
{
	char *ret = str;
	for (;;)
	{
		if (*str == 0)
			break;
		if ((*str >= 'a') && (*str <= 'z'))
			*str = (*str) - 32;
		str++;
	}
	return ret;
}


char	*lcase(char *str)
{
	char *ret = str;
	for (;;)
	{
		if (*str == 0)
			break;
		if ((*str >= 'A') && (*str <= 'Z'))
			*str = (*str) + 32;
		str++;
	}
	return ret;
}