dvander@233: /**
ds@475:  * vim: set ts=4 :
ds@1330:  * =============================================================================
ds@1947:  * SourceMod (C)2004-2008 AlliedModders LLC.  All rights reserved.
ds@1330:  * =============================================================================
ds@1330:  *
ds@1330:  * This file is part of the SourceMod/SourcePawn SDK.
dvander@374:  *
ds@1330:  * This program is free software; you can redistribute it and/or modify it under
ds@1330:  * the terms of the GNU General Public License, version 3.0, as published by the
ds@1330:  * Free Software Foundation.
ds@1330:  * 
ds@1330:  * This program is distributed in the hope that it will be useful, but WITHOUT
ds@1330:  * ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
ds@1330:  * FOR A PARTICULAR PURPOSE.  See the GNU General Public License for more
ds@1330:  * details.
ds@1330:  *
ds@1330:  * You should have received a copy of the GNU General Public License along with
ds@1330:  * this program.  If not, see <http://www.gnu.org/licenses/>.
ds@1330:  *
ds@1330:  * As a special exception, AlliedModders LLC gives you permission to link the
ds@1330:  * code of this program (as well as its derivative works) to "Half-Life 2," the
ds@1330:  * "Source Engine," the "SourcePawn JIT," and any Game MODs that run on software
ds@1330:  * by the Valve Corporation.  You must obey the GNU General Public License in
ds@1330:  * all respects for all other code used.  Additionally, AlliedModders LLC grants
ds@1330:  * this exception to all derivative works.  AlliedModders LLC defines further
ds@1330:  * exceptions, found in LICENSE.txt (as of this writing, version JULY-31-2007),
ds@1330:  * or <http://www.sourcemod.net/license.php>.
dvander@374:  *
dvander@374:  * Version: $Id$
dvander@233:  */
dvander@374:  
dvander@233: #if defined _string_included
dvander@233:  #endinput
dvander@233: #endif
dvander@233: #define _string_included
dvander@233: 
dvander@233: /**
dvander@748:  * @global Unless otherwise noted, all string functions which take in a 
dvander@748:  * writable buffer and maximum length should have the null terminator INCLUDED
dvander@748:  * in the length.  This means that this is valid: 
dvander@1010:  * strcopy(string, sizeof(string), ...)
dvander@233:  */
dvander@631:  
dvander@233: /**
dvander@233:  * Calculates the length of a string.
dvander@233:  *
ds@475:  * @param str			String to check.
dvander@1652:  * @return				Number of valid character bytes in the string.
dvander@233:  */
dvander@233: native strlen(const String:str[]);
dvander@233: 
dvander@233: /**
dvander@233:  * Tests whether a string is found inside another string.
dvander@233:  *
dvander@233:  * @param str			String to search in.
dvander@233:  * @param substr		Substring to find inside the original string.
dvander@233:  * @param caseSensitive	If true (default), search is case sensitive.
ds@475:  *						If false, search is case insensitive.
ds@475:  * @return				-1 on failure (no match found). Any other value
ds@475:  *						indicates a position in the string where the match starts.
dvander@233:  */
dvander@233: native StrContains(const String:str[], const String:substr[], bool:caseSensitive=true);
dvander@233: 
dvander@233: /**
dvander@233:  * Compares two strings lexographically.
dvander@233:  *
dvander@233:  * @param str1			First string (left).
dvander@233:  * @param str2			Second string (right).
dvander@233:  * @param caseSensitive	If true (default), comparison is case sensitive.
ds@475:  *						If false, comparison is case insensitive.
ds@475:  * @return				-1 if str1 < str2
ds@475:  *						0 if str1 == str2
ds@475:  *						1 if str1 > str2
dvander@233:  */
dvander@680: native strcmp(const String:str1[], const String:str2[], bool:caseSensitive=true);
dvander@680: 
dvander@680: /**
dvander@680:  * Compares two strings parts lexographically.
dvander@680:  *
dvander@680:  * @param str1			First string (left).
dvander@680:  * @param str2			Second string (right).
dvander@680:  * @param num			Number of characters to compare.
dvander@680:  * @param caseSensitive	If true (default), comparison is case sensitive.
dvander@680:  *						If false, comparison is case insensitive.
dvander@680:  * @return				-1 if str1 < str2
dvander@680:  *						0 if str1 == str2
dvander@680:  *						1 if str1 > str2
dvander@680:  */
dvander@680: native strncmp(const String:str1[], const String:str2[], num, bool:caseSensitive=true);
dvander@680: 
dvander@680: /**
dvander@680:  * Backwards compatible stock - StrCompare is now strcmp
dvander@681:  * @deprecated		Renamed to strcmp
dvander@680:  */
ds@1268: #pragma deprecated Use strcmp() instead
dvander@680: stock StrCompare(const String:str1[], const String:str2[], bool:caseSensitive=true)
dvander@680: {
dvander@680: 	return strcmp(str1, str2, caseSensitive);
dvander@680: }
dvander@233: 
dvander@233: /**
dvander@233:  * Returns whether two strings are equal.
dvander@233:  *
dvander@233:  * @param str1			First string (left).
dvander@233:  * @param str2			Second string (right).
dvander@233:  * @param caseSensitive	If true (default), comparison is case sensitive.
dvander@412:  * 						If false, comparison is case insensitive.
dvander@412:  * @return				True if equal, false otherwise.
dvander@233:  */
faluco@234: stock bool:StrEqual(const String:str1[], const String:str2[], bool:caseSensitive=true)
dvander@233: {
ds@1268: 	return (strcmp(str1, str2, caseSensitive) == 0);
dvander@233: }
dvander@233: 
dvander@233: /**
dvander@233:  * Copies one string to another string.
dvander@619:  * @note If the destination buffer is too small to hold the source string, the 
dvander@619:  *       destination will be truncated.
dvander@233:  *
dvander@233:  * @param dest			Destination string buffer to copy to.
dvander@233:  * @param destlen		Destination buffer length (includes null terminator).
dvander@233:  * @param source		Source string buffer to copy from.
dvander@412:  * @return				Number of cells written.
dvander@233:  */
dvander@681: native strcopy(String:dest[], destLen, const String:source[]);
dvander@681: 
dvander@681: /**
dvander@681:  * Backwards compatibility stock - use strcopy
dvander@681:  * @deprecated			Renamed to strcopy
dvander@681:  */
ds@1268: #pragma deprecated Use strcopy() instead
dvander@681: stock StrCopy(String:dest[], destLen, const String:source[])
dvander@681: {
dvander@681: 	return strcopy(dest, destLen, source);
dvander@681: }
dvander@233: 
dvander@233: /**
dvander@257:  * Formats a string according to the SourceMod format rules (see documentation).
dvander@257:  *
dvander@257:  * @param buffer		Destination string buffer.
dvander@257:  * @param maxlength		Maximum length of output string buffer.
dvander@257:  * @param format		Formatting rules.
dvander@257:  * @param ...			Variable number of format parameters.
dvander@412:  * @return				Number of cells written.
dvander@257:  */
ds@634: native Format(String:buffer[], maxlength, const String:format[], any:...);
dvander@257: 
dvander@257: /**
dvander@257:  * Formats a string according to the SourceMod format rules (see documentation).
dvander@748:  * @note This is the same as Format(), except none of the input buffers can 
dvander@748:  *       overlap the same memory as the output buffer.  Since this security 
dvander@748:  *       check is removed, it is slightly faster.
dvander@257:  *
dvander@257:  * @param buffer		Destination string buffer.
dvander@257:  * @param maxlength		Maximum length of output string buffer.
dvander@257:  * @param format		Formatting rules.
dvander@257:  * @param ...			Variable number of format parameters.
dvander@412:  * @return				Number of cells written.
dvander@257:  */
ds@634: native FormatEx(String:buffer[], maxlength, const String:format[], any:...);
dvander@257: 
dvander@257: /**
dvander@412:  * Formats a string according to the SourceMod format rules (see documentation).
dvander@748:  * @note This is the same as Format(), except it grabs parameters from a 
dvander@748:  *       parent parameter stack, rather than a local.  This is useful for 
dvander@748:  *       implementing your own variable argument functions.
dvander@412:  *
dvander@412:  * @param buffer		Destination string buffer.
dvander@412:  * @param maxlength		Maximum length of output string buffer.
dvander@412:  * @param format		Formatting rules.
dvander@412:  * @param varpos		Argument number which contains the '...' symbol.
dvander@412:  *						Note: Arguments start at 1.
dvander@412:  * @return 				Number of bytes written.
dvander@412:  */
dvander@412: native VFormat(String:buffer[], maxlength, const String:format[], varpos);
dvander@412: 
dvander@412: /**
dvander@233:  * Converts a string to an integer.
dvander@233:  *
dvander@233:  * @param str			String to convert.
dvander@412:  * @param nBase			Numerical base to use.  10 is default.
dvander@412:  * @return				Integer conversion of string, or 0 on failure.
dvander@233:  */
dvander@233: native StringToInt(const String:str[], nBase=10);
dvander@233: 
dvander@233: /**
dvander@1072:  * Converts a string to an integer with some more options.
dvander@1072:  *
dvander@1072:  * @param str			String to convert.
dvander@1072:  * @param result		Variable to store the result in.
dvander@1072:  * @param nBase			Numerical base to use.  10 is default.
dvander@1072:  * @return				Number of characters consumed.
dvander@1072:  */
dvander@1072: native StringToIntEx(const String:str[], &result, nBase=10);
dvander@1072: 
dvander@1072: /**
dvander@233:  * Converts an integer to a string.
dvander@233:  *
dvander@451:  * @param num			Integer to convert.
dvander@233:  * @param str			Buffer to store string in.
dvander@233:  * @param maxlength		Maximum length of string buffer.
dvander@412:  * @return				Number of cells written to buffer.
dvander@233:  */
dvander@451: native IntToString(num, String:str[], maxlength);
dvander@233: 
dvander@233: /** 
dvander@233:  * Converts a string to a floating point number.
dvander@233:  *
dvander@233:  * @param str			String to convert to a foat.
dvander@412:  * @return				Floating point result, or 0.0 on error.
dvander@233:  */
dvander@233: native Float:StringToFloat(const String:str[]);
dvander@233: 
dvander@1072: /** 
dvander@1072:  * Converts a string to a floating point number with some more options.
dvander@1072:  *
dvander@1072:  * @param str			String to convert to a foat.
dvander@1072:  * @param result		Variable to store result in.
dvander@1072:  * @return				Number of characters consumed.
dvander@1072:  */
dvander@1072: native StringToFloatEx(const String:str[], &Float:result);
dvander@1072: 
dvander@233: /**
dvander@233:  * Converts a floating point number to a string.
dvander@233:  *
ds@454:  * @param num			Floating point number to convert.
dvander@233:  * @param str			Buffer to store string in.
dvander@233:  * @param maxlength		Maximum length of string buffer.
dvander@412:  * @return				Number of cells written to buffer.
dvander@233:  */
ds@454: native FloatToString(Float:num, String:str[], maxlength);
dvander@631: 
dvander@631: /**
dvander@631:  * Finds the first "argument" in a string; either a set of space
dvander@631:  * terminated characters, or a fully quoted string.  After the 
dvander@631:  * argument is found, whitespace is read until the next portion
dvander@631:  * of the string is reached.  If nothing remains, -1 is returned.
dvander@631:  * Otherwise, the index to the first character is returned.
dvander@631:  *
dvander@631:  * @param source		Source input string.
dvander@631:  * @param arg			Stores argument read from string.
dvander@631:  * @param argLen		Maximum length of argument buffer.
dvander@631:  * @return				Index to next piece of string, or -1 if none.
dvander@631:  */
ds@830: native BreakString(const String:source[], String:arg[], argLen);
ds@830: 
ds@830: /**
ds@830:  * Backwards compatibility stock - use BreakString
ds@830:  * @deprecated			Renamed to BreakString.
ds@830:  */
ds@1268: #pragma deprecated Use BreakString() instead
ds@830: stock StrBreak(const String:source[], String:arg[], argLen)
ds@830: {
ds@830: 	return BreakString(source, arg, argLen);
ds@830: }
dvander@748: 
dvander@833: /**
ds@839:  * Removes whitespace characters from the beginning and end of a string.
ds@839:  *
ds@839:  * @param str			The string to trim.
ds@839:  * @return				Number of bytes written (UTF-8 safe).
ds@839:  */
ds@839: native TrimString(String:str[]);
ds@839: 
ds@839: /**
dvander@834:  * Returns text in a string up until a certain character sequence is reached.
dvander@834:  *
dvander@834:  * @param source		Source input string.
ds@839:  * @param split			A string which specifies a search point to break at.
dvander@834:  * @param part			Buffer to store string part.
dvander@834:  * @param partLen		Maximum length of the string part buffer.
dvander@834:  * @return				-1 if no match was found; otherwise, an index into source
dvander@834:  *						marking the first index after the searched text.  The
dvander@834:  *						index is always relative to the start of the input string.
dvander@834:  */
dvander@834: native SplitString(const String:source[], const String:split[], String:part[], partLen);
dvander@834: 
dvander@834: /**
dvander@833:  * Given a string, replaces all occurrences of a search string with a 
dvander@833:  * replacement string.
dvander@833:  *
dvander@833:  * @param text			String to perform search and replacements on.
dvander@833:  * @param maxlength		Maximum length of the string buffer.
dvander@833:  * @param search		String to search for.
dvander@833:  * @param replace		String to replace the search string with.
dvander@833:  * @return				Number of replacements that were performed.
dvander@833:  */
dvander@833: native ReplaceString(String:text[], maxlength, const String:search[], const String:replace[]);
dvander@833: 
dvander@833: /**
dvander@833:  * Given a string, replaces the first occurrence of a search string with a 
dvander@833:  * replacement string.
dvander@833:  *
dvander@833:  * @param text			String to perform search and replacements on.
dvander@833:  * @param maxlength		Maximum length of the string buffer.
dvander@833:  * @param search		String to search for.
dvander@833:  * @param replace		String to replace the search string with.
dvander@833:  * @param searchLen		If higher than -1, its value will be used instead of
dvander@833:  *						a strlen() call on the search parameter.
dvander@833:  * @param replaceLen	If higher than -1, its value will be used instead of
dvander@833:  *						a strlen() call on the replace parameter.
dvander@833:  * @return				Index into the buffer (relative to the start) from where
dvander@833:  *						the last replacement ended, or -1 if no replacements were
dvander@833:  *						made.
dvander@833:  */
dvander@833: native ReplaceStringEx(String:text[], maxlength, const String:search[], const String:replace[], searchLen=-1, replaceLen=-1);
dvander@833: 
dvander@748: /** 
dvander@748:  * Returns the number of bytes a character is using.  This is
dvander@748:  * for multi-byte characters (UTF-8).  For normal ASCII characters,
dvander@748:  * this will return 1.
dvander@748:  *
dvander@748:  * @param source		Source input string.
dvander@748:  * @return				Number of bytes the current character uses.
dvander@748:  */
dvander@748: native GetCharBytes(const String:source[]);
dvander@748: 
dvander@748: /**
dvander@748:  * Returns whether a character is an ASCII alphabet character.
dvander@748:  *
dvander@748:  * @note Multi-byte characters will always return false.
dvander@748:  *
dvander@748:  * @param char			Character to test.
dvander@748:  * @return				True if character is alphabetical, otherwise false.
dvander@748:  */
dvander@748: native bool:IsCharAlpha(chr);
dvander@748: 
dvander@748: /**
dvander@748:  * Returns whether a character is numeric.
dvander@748:  *
dvander@748:  * @note Multi-byte characters will always return false.
dvander@748:  *
dvander@748:  * @param char			Character to test.
dvander@748:  * @return				True if character is numeric, otherwise false.
dvander@748:  */
dvander@748: native bool:IsCharNumeric(chr);
dvander@748: 
dvander@748: /**
dvander@748:  * Returns whether a character is whitespace.
dvander@748:  *
dvander@748:  * @note Multi-byte characters will always return false.
dvander@748:  *
dvander@748:  * @param char			Character to test.
dvander@748:  * @return				True if character is whitespace, otherwise false.
dvander@748:  */
dvander@748: native bool:IsCharSpace(chr);
dvander@748: 
dvander@748: /**
dvander@748:  * Returns if a character is multi-byte or not.
dvander@748:  *
dvander@748:  * @param char			Character to test.
dvander@748:  * @return				0 for a normal 7-bit ASCII character,
dvander@748:  *						otherwise number of bytes in multi-byte character.
dvander@748:  */
dvander@748: native IsCharMB(chr);
dvander@748: 
dvander@748: /**
dvander@748:  * Returns whether an alphabetic character is uppercase.
dvander@748:  *
dvander@748:  * @note Multi-byte characters will always return false.
dvander@748:  *
dvander@748:  * @param char			Character to test.
dvander@748:  * @return				True if character is uppercase, otherwise false.
dvander@748:  */
dvander@748: native bool:IsCharUpper(chr);
dvander@748: 
dvander@748: /**
dvander@748:  * Returns whether an alphabetic character is lowercase.
dvander@748:  *
dvander@748:  * @note Multi-byte characters will always return false.
dvander@748:  *
dvander@748:  * @param char			Character to test.
dvander@748:  * @return				True if character is lowercase, otherwise false.
dvander@748:  */
dvander@748: native bool:IsCharLower(chr);
dvander@748: 
dvander@748: /**
dvander@2004:  * Strips a quote pair off a string if it exists.  That is, the following 
dvander@2004:  * replace rule is applied once:  $"(.*)"^ -> $\1^
dvander@2004:  *
dvander@2004:  * Note that the leading and trailing quotes will only be removed if both 
dvander@2004:  * exist.  Otherwise, the string is left unmodified.  This function should 
dvander@2004:  * be considered O(k) (all characters get shifted down).
dvander@2004:  *
dvander@2004:  * @param text			String to modify (in place).
dvander@2004:  * @return				True if string was modified, false if there was no 
dvander@2004:  *						set of quotes.
dvander@2004:  */
dvander@2004: native bool:StripQuotes(String:text[]);
dvander@2004: 
dvander@2004: /**
dvander@748:  * Returns an uppercase character to a lowercase character.
dvander@748:  *
dvander@748:  * @param chr			Characer to convert.
dvander@748:  * @return				Lowercase character on success, 
dvander@748:  *						no change on failure.
dvander@748:  */
dvander@748: stock CharToUpper(chr)
dvander@748: {
dvander@748: 	if (IsCharLower(chr))
dvander@748: 	{
dvander@748: 		return (chr & ~(1<<5));
dvander@748: 	}
dvander@748: 	return chr;
dvander@748: }
dvander@748: 
dvander@748: /**
dvander@748:  * Returns a lowercase character to an uppercase character.
dvander@748:  *
dvander@748:  * @param chr			Characer to convert.
dvander@748:  * @return				Uppercase character on success, 
dvander@748:  *						no change on failure.
dvander@748:  */
dvander@748: stock CharToLower(chr)
dvander@748: {
dvander@748: 	if (IsCharUpper(chr))
dvander@748: 	{
dvander@748: 		return (chr | (1<<5));
dvander@748: 	}
dvander@748: 	return chr;
dvander@748: }
dvander@748: 
dvander@749: /**
dvander@2070:  * Finds the first occurrence of a character in a string.
dvander@2070:  *
dvander@2070:  * @param str			String.
dvander@2070:  * @param c				Character to search for.
dvander@2070:  * @param reverse		False (default) to search forward, true to search 
dvander@2070:  *						backward.
dvander@2070:  * @return				The index of the first occurrence of the character 
dvander@2070:  * 						in the string, or -1 if the character was not found.
dvander@2070:  */
dvander@2070: stock FindCharInString(const String:str[], c, bool:reverse = false)
dvander@2070: {
dvander@2070: 	new i, len
dvander@2070: 
dvander@2070: 	len = strlen(str);
dvander@2070: 	
dvander@2070: 	if (!reverse)
dvander@2070: 	{
dvander@2070: 		for (i = 0; i < len; i++)
dvander@2070: 		{
dvander@2070: 			if (str[i] == c)
dvander@2070: 			{
dvander@2070: 				return i;
dvander@2070: 			}
dvander@2070: 		}
dvander@2070: 	}
dvander@2070: 	else
dvander@2070: 	{
dvander@2070: 		for (i = len - 1; i >= 0; i--)
dvander@2070: 		{
dvander@2070: 			if (str[i] == c)
dvander@2070: 			{
dvander@2070: 				return i;
dvander@2070: 			}
dvander@2070: 		}
dvander@2070: 	}
dvander@2070: 
dvander@2070: 	return -1;
dvander@2070: }
dvander@2070: 
dvander@2070: /**
dvander@749:  * Concatenates one string onto another.
dvander@749:  *
dvander@749:  * @param buffer		String to append to.
dvander@749:  * @param maxlength		Maximum length of entire buffer.
dvander@749:  * @param source		Source string to concatenate.
dvander@749:  * @return				Number of bytes written.
dvander@749:  */
dvander@749: stock StrCat(String:buffer[], maxlength, const String:source[])
dvander@749: {
teame06@1254: 	new len = strlen(buffer);
dvander@749: 	if (len >= maxlength)
dvander@749: 	{
dvander@749: 		return 0;
dvander@749: 	}
dvander@749: 	
dvander@749: 	return Format(buffer[len], maxlength-len, "%s", source);
dvander@749: }
ds@830: 
ds@830: /**
dvander@834:  * Breaks a string into pieces and stores each piece into an array of buffers.
dvander@834:  *
dvander@834:  * @param text				The string to split.
dvander@834:  * @param split				The string to use as a split delimiter.
dvander@834:  * @param buffers			An array of string buffers (2D array).
dvander@834:  * @param maxStrings		Number of string buffers (first dimension size).
dvander@834:  * @param maxStringLength	Maximum length of each string buffer.
dvander@834:  * @return					Number of strings retrieved.
dvander@834:  */
dvander@834: stock ExplodeString(const String:text[], const String:split[], String:buffers[][], maxStrings, maxStringLength)
dvander@834: {
dvander@834: 	new reloc_idx, idx, total;
dvander@834: 	
dvander@834: 	if (maxStrings < 1 || split[0] == '\0')
dvander@834: 	{
dvander@834: 		return 0;
dvander@834: 	}
dvander@834: 	
dvander@834: 	while ((idx = SplitString(text[reloc_idx], split, buffers[total], maxStringLength)) != -1)
dvander@834: 	{
dvander@834: 		reloc_idx += idx;
dvander@834: 		if (text[reloc_idx] == '\0')
dvander@834: 		{
dvander@834: 			break;
dvander@834: 		}
dvander@834: 		if (++total >= maxStrings)
dvander@834: 		{
dvander@834: 			return total;
dvander@834: 		}
dvander@834: 	}
dvander@834: 	
dvander@834: 	if (text[reloc_idx] != '\0' && total <= maxStrings - 1)
dvander@834: 	{
dvander@834: 		strcopy(buffers[total++], maxStringLength, text[reloc_idx]);
dvander@834: 	}
dvander@834: 	
dvander@834: 	return total;
dvander@834: }
dvander@834: 
dvander@834: /**
dvander@834:  * Joins an array of strings into one string, with a "join" string inserted in
dvander@834:  * between each given string.  This function complements ExplodeString.
dvander@834:  *
dvander@834:  * @param strings		An array of strings.
dvander@834:  * @param numStrings	Number of strings in the array.
dvander@834:  * @param join			The join string to insert between each string.
dvander@834:  * @param buffer		Output buffer to write the joined string to.
dvander@834:  * @param maxLength		Maximum length of the output buffer.
dvander@834:  * @return				Number of bytes written to the output buffer.
dvander@834:  */
dvander@834: stock ImplodeStrings(const String:strings[][], numStrings, const String:join[], String:buffer[], maxLength)
dvander@834: {
dvander@834: 	new total, length, part_length;
dvander@834: 	new join_length = strlen(join);
dvander@834: 	for (new i=0; i<numStrings; i++)
dvander@834: 	{
dvander@834: 		length = strcopy(buffer[total], maxLength-total, strings[i]);
dvander@834: 		total += length;
dvander@834: 		if (length < part_length)
dvander@834: 		{
dvander@834: 			break;
dvander@834: 		}
dvander@834: 		if (i != numStrings - 1)
dvander@834: 		{
dvander@834: 			length = strcopy(buffer[total], maxLength-total, join);
dvander@834: 			total += length;
dvander@834: 			if (length < join_length)
dvander@834: 			{
dvander@834: 				break;
dvander@834: 			}
dvander@834: 		}
dvander@834: 	}
dvander@834: 	return total;
dvander@834: }