path: root/src/common/strlib.c

// Copyright (c) Athena Dev Teams - Licensed under GNU GPL
// For more information, see LICENCE in the main folder

#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>

#include "strlib.h"
#include "../common/cbasetypes.h"
#include "../common/utils.h"
#include "../common/malloc.h"


#define J_MAX_MALLOC_SIZE 65535

// escapes a string in-place (' -> \' , \ -> \\ , % -> _)
char* jstrescape (char* pt)
{
	//copy from here
	char *ptr;
	int i = 0, j = 0;

	//copy string to temporary
	CREATE(ptr, char, J_MAX_MALLOC_SIZE);
	strcpy(ptr,pt);

	while (ptr[i] != '\0') {
		switch (ptr[i]) {
			case '\'':
				pt[j++] = '\\';
				pt[j++] = ptr[i++];
				break;
			case '\\':
				pt[j++] = '\\';
				pt[j++] = ptr[i++];
				break;
			case '%':
				pt[j++] = '_'; i++;
				break;
			default:
				pt[j++] = ptr[i++];
		}
	}
	pt[j++] = '\0';
	aFree(ptr);
	return pt;
}

// escapes a string into a provided buffer
char* jstrescapecpy (char* pt, const char* spt)
{
	//copy from here
	//WARNING: Target string pt should be able to hold strlen(spt)*2, as each time
	//a escape character is found, the target's final length increases! [Skotlex]
	int i =0, j=0;

	if (!spt) {	//Return an empty string [Skotlex]
		pt[0] = '\0';
		return &pt[0];
	}
	
	while (spt[i] != '\0') {
		switch (spt[i]) {
			case '\'':
				pt[j++] = '\\';
				pt[j++] = spt[i++];
				break;
			case '\\':
				pt[j++] = '\\';
				pt[j++] = spt[i++];
				break;
			case '%':
				pt[j++] = '_'; i++;
				break;
			default:
				pt[j++] = spt[i++];
		}
	}
	pt[j++] = '\0';
	return &pt[0];
}

// escapes exactly 'size' bytes of a string into a provided buffer
int jmemescapecpy (char* pt, const char* spt, int size)
{
	//copy from here
	int i =0, j=0;

	while (i < size) {
		switch (spt[i]) {
			case '\'':
				pt[j++] = '\\';
				pt[j++] = spt[i++];
				break;
			case '\\':
				pt[j++] = '\\';
				pt[j++] = spt[i++];
				break;
			case '%':
				pt[j++] = '_'; i++;
				break;
			default:
				pt[j++] = spt[i++];
		}
	}
	// copy size is 0 ~ (j-1)
	return j;
}

// Function to suppress control characters in a string.
int remove_control_chars(char* str)
{
	int i;
	int change = 0;

	for(i = 0; str[i]; i++) {
		if (str[i] < 32) {
			str[i] = '_';
			change = 1;
		}
	}

	return change;
}

//Trims a string, also removes illegal characters such as \t and reduces continous spaces to a single one. by [Foruken]
char* trim(char* str, const char* delim)
{
	char* strp = strtok(str,delim);
	char buf[1024];
	char* bufp = buf;
	memset(buf,0,sizeof buf);

	while(strp) {
		strcpy(bufp, strp);
		bufp = bufp + strlen(strp);
		strp = strtok(NULL, delim);
		if (strp) {
			strcpy(bufp," ");
			bufp++;
		}
	}
	strcpy(str,buf);
	return str;
}


//stristr: Case insensitive version of strstr, code taken from 
//http://www.daniweb.com/code/snippet313.html, Dave Sinkula
//
const char* stristr(const char* haystack, const char* needle)
{
	if ( !*needle )
	{
		return haystack;
	}
	for ( ; *haystack; ++haystack )
	{
		if ( TOUPPER(*haystack) == TOUPPER(*needle) )
		{
			// matched starting char -- loop through remaining chars
			const char *h, *n;
			for ( h = haystack, n = needle; *h && *n; ++h, ++n )
			{
				if ( TOUPPER(*h) != TOUPPER(*n) )
				{
					break;
				}
			}
			if ( !*n ) // matched all of 'needle' to null termination
			{
				return haystack; // return the start of the match
			}
		}
	}
	return 0;
}

#ifdef __WIN32
char* _strtok_r(char *s1, const char *s2, char **lasts)
{
	char *ret;

	if (s1 == NULL)
		s1 = *lasts;
	while(*s1 && strchr(s2, *s1))
		++s1;
	if(*s1 == '\0')
		return NULL;
	ret = s1;
	while(*s1 && !strchr(s2, *s1))
		++s1;
	if(*s1)
		*s1++ = '\0';
	*lasts = s1;
	return ret;
}
#endif

#if !defined(WIN32) || (defined(_MSC_VER) && _MSC_VER < 1400)
/* Find the length of STRING, but scan at most MAXLEN characters.
   If no '\0' terminator is found in that many characters, return MAXLEN.  */
size_t strnlen (const char* string, size_t maxlen)
{
  const char* end = memchr (string, '\0', maxlen);
  return end ? (size_t) (end - string) : maxlen;
}
#endif