/**

  * vim: set ts=4 :

  * ===============================================================

  * SourceMod (C)2004-2007 AlliedModders LLC.  All rights reserved.

  * ===============================================================

  *

  *  This file is part of the SourceMod/SourcePawn SDK.  This file may only be used 

  * or modified under the Terms and Conditions of its License Agreement, which is found 

  * in LICENSE.txt.  The Terms and Conditions for making SourceMod extensions/plugins 

  * may change at any time.  To view the latest information, see:

  *   http://www.sourcemod.net/license.php

  *

  * Version: $Id$

  */

 #if defined _string_included

  #endinput

 #endif

 #define _string_included

 /**

  * @global Unless otherwise noted, all string functions which take in a 

  * writable buffer and maximum length should have the null terminator INCLUDED

  * in the length.  This means that this is valid: 

  * StrCopy(string, sizeof(string), ...)

  */

 /**

  * Calculates the length of a string.

  *

  * @param str			String to check.

  * @return				Length of string, in cells (NOT characters).

  */

 native strlen(const String:str[]);

 /**

  * Tests whether a string is found inside another string.

  *

  * @param str			String to search in.

  * @param substr		Substring to find inside the original string.

  * @param caseSensitive	If true (default), search is case sensitive.

  *						If false, search is case insensitive.

  * @return				-1 on failure (no match found). Any other value

  *						indicates a position in the string where the match starts.

  */

 native StrContains(const String:str[], const String:substr[], bool:caseSensitive=true);

 /**

  * Compares two strings lexographically.

  *

  * @param str1			First string (left).

  * @param str2			Second string (right).

  * @param caseSensitive	If true (default), comparison is case sensitive.

  *						If false, comparison is case insensitive.

  * @return				-1 if str1 < str2

  *						0 if str1 == str2

  *						1 if str1 > str2

  */

 native strcmp(const String:str1[], const String:str2[], bool:caseSensitive=true);

 /**

  * Compares two strings parts lexographically.

  *

  * @param str1			First string (left).

  * @param str2			Second string (right).

  * @param num			Number of characters to compare.

  * @param caseSensitive	If true (default), comparison is case sensitive.

  *						If false, comparison is case insensitive.

  * @return				-1 if str1 < str2

  *						0 if str1 == str2

  *						1 if str1 > str2

  */

 native strncmp(const String:str1[], const String:str2[], num, bool:caseSensitive=true);

 /**

  * Backwards compatible stock - StrCompare is now strcmp

  * @deprecated		Renamed to strcmp

  */

 stock StrCompare(const String:str1[], const String:str2[], bool:caseSensitive=true)

 {

 	return strcmp(str1, str2, caseSensitive);

 }

 /**

  * Returns whether two strings are equal.

  *

  *

  * @param str1			First string (left).

  * @param str2			Second string (right).

  * @param caseSensitive	If true (default), comparison is case sensitive.

  * 						If false, comparison is case insensitive.

  * @return				True if equal, false otherwise.

  */

 stock bool:StrEqual(const String:str1[], const String:str2[], bool:caseSensitive=true)

 {

 	return (StrCompare(str1, str2, caseSensitive) == 0);

 }

 /**

  * Copies one string to another string.

  * @note If the destination buffer is too small to hold the source string, the 

  *       destination will be truncated.

  *

  * @param dest			Destination string buffer to copy to.

  * @param destlen		Destination buffer length (includes null terminator).

  * @param source		Source string buffer to copy from.

  * @return				Number of cells written.

  */

 native strcopy(String:dest[], destLen, const String:source[]);

 /**

  * Backwards compatibility stock - use strcopy

  * @deprecated			Renamed to strcopy

  */

 stock StrCopy(String:dest[], destLen, const String:source[])

 {

 	return strcopy(dest, destLen, source);

 }

 /**

  * Formats a string according to the SourceMod format rules (see documentation).

  *

  * @param buffer		Destination string buffer.

  * @param maxlength		Maximum length of output string buffer.

  * @param format		Formatting rules.

  * @param ...			Variable number of format parameters.

  * @return				Number of cells written.

  */

 native Format(String:buffer[], maxlength, const String:format[], any:...);

 /**

  * Formats a string according to the SourceMod format rules (see documentation).

  * @note This is the same as Format(), except none of the input buffers can 

  *       overlap the same memory as the output buffer.  Since this security 

  *       check is removed, it is slightly faster.

  *

  * @param buffer		Destination string buffer.

  * @param maxlength		Maximum length of output string buffer.

  * @param format		Formatting rules.

  * @param ...			Variable number of format parameters.

  * @return				Number of cells written.

  */

 native FormatEx(String:buffer[], maxlength, const String:format[], any:...);

 /**

  * Formats a string according to the SourceMod format rules (see documentation).

  * @note This is the same as Format(), except it grabs parameters from a 

  *       parent parameter stack, rather than a local.  This is useful for 

  *       implementing your own variable argument functions.

  *

  * @param buffer		Destination string buffer.

  * @param maxlength		Maximum length of output string buffer.

  * @param format		Formatting rules.

  * @param varpos		Argument number which contains the '...' symbol.

  *						Note: Arguments start at 1.

  * @return 				Number of bytes written.

  */

 native VFormat(String:buffer[], maxlength, const String:format[], varpos);

 /**

  * Converts a string to an integer.

  *

  * @param str			String to convert.

  * @param nBase			Numerical base to use.  10 is default.

  * @return				Integer conversion of string, or 0 on failure.

  */

 native StringToInt(const String:str[], nBase=10);

 /**

  * Converts an integer to a string.

  *

  * @param num			Integer to convert.

  * @param str			Buffer to store string in.

  * @param maxlength		Maximum length of string buffer.

  * @return				Number of cells written to buffer.

  */

 native IntToString(num, String:str[], maxlength);

 /** 

  * Converts a string to a floating point number.

  *

  * @param str			String to convert to a foat.

  * @return				Floating point result, or 0.0 on error.

  */

 native Float:StringToFloat(const String:str[]);

 /**

  * Converts a floating point number to a string.

  *

  * @param num			Floating point number to convert.

  * @param str			Buffer to store string in.

  * @param maxlength		Maximum length of string buffer.

  * @return				Number of cells written to buffer.

  */

 native FloatToString(Float:num, String:str[], maxlength);

 /**

  * Finds the first "argument" in a string; either a set of space

  * terminated characters, or a fully quoted string.  After the 

  * argument is found, whitespace is read until the next portion

  * of the string is reached.  If nothing remains, -1 is returned.

  * Otherwise, the index to the first character is returned.

  *

  * @param source		Source input string.

  * @param arg			Stores argument read from string.

  * @param argLen		Maximum length of argument buffer.

  * @return				Index to next piece of string, or -1 if none.

  */

 native StrBreak(const String:source[], String:arg[], argLen);

 /** 

  * Returns the number of bytes a character is using.  This is

  * for multi-byte characters (UTF-8).  For normal ASCII characters,

  * this will return 1.

  *

  * @param source		Source input string.

  * @return				Number of bytes the current character uses.

  */

 native GetCharBytes(const String:source[]);

 /**

  * Returns whether a character is an ASCII alphabet character.

  *

  * @note Multi-byte characters will always return false.

  *

  * @param char			Character to test.

  * @return				True if character is alphabetical, otherwise false.

  */

 native bool:IsCharAlpha(chr);

 /**

  * Returns whether a character is numeric.

  *

  * @note Multi-byte characters will always return false.

  *

  * @param char			Character to test.

  * @return				True if character is numeric, otherwise false.

  */

 native bool:IsCharNumeric(chr);

 /**

  * Returns whether a character is whitespace.

  *

  * @note Multi-byte characters will always return false.

  *

  * @param char			Character to test.

  * @return				True if character is whitespace, otherwise false.

  */

 native bool:IsCharSpace(chr);

 /**

  * Returns if a character is multi-byte or not.

  *

  * @param char			Character to test.

  * @return				0 for a normal 7-bit ASCII character,

  *						otherwise number of bytes in multi-byte character.

  */

 native IsCharMB(chr);

 /**

  * Returns whether an alphabetic character is uppercase.

  *

  * @note Multi-byte characters will always return false.

  *

  * @param char			Character to test.

  * @return				True if character is uppercase, otherwise false.

  */

 native bool:IsCharUpper(chr);

 /**

  * Returns whether an alphabetic character is lowercase.

  *

  * @note Multi-byte characters will always return false.

  *

  * @param char			Character to test.

  * @return				True if character is lowercase, otherwise false.

  */

 native bool:IsCharLower(chr);

 /**

  * Returns an uppercase character to a lowercase character.

  *

  * @param chr			Characer to convert.

  * @return				Lowercase character on success, 

  *						no change on failure.

  */

 stock CharToUpper(chr)

 {

 	if (IsCharLower(chr))

 	{

 		return (chr & ~(1<<5));

 	}

 	return chr;

 }

 /**

  * Returns a lowercase character to an uppercase character.

  *

  * @param chr			Characer to convert.

  * @return				Uppercase character on success, 

  *						no change on failure.

  */

 stock CharToLower(chr)

 {

 	if (IsCharUpper(chr))

 	{

 		return (chr | (1<<5));

 	}

 	return chr;

 }

 /**

  * Concatenates one string onto another.

  *

  * @param buffer		String to append to.

  * @param maxlength		Maximum length of entire buffer.

  * @param source		Source string to concatenate.

  * @return				Number of bytes written.

  */

 stock StrCat(String:buffer[], maxlength, const String:source[])

 {

 	new len = strlen(source);

 	if (len >= maxlength)

 	{

 		return 0;

 	}

 	return Format(buffer[len], maxlength-len, "%s", source);

 }