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String Manipulation Functions


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milutinke
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Join Date: Jun 2012
Location: Serbia
Old 04-05-2020 , 14:45   String Manipulation Functions
Reply With Quote #1

I have started to make one plugin where I need to do some string manipulation, however, I have not found the following function in the Source Pawn, so I have decided to make them myself or port some from the AMXX.
I hope that someone will find them useful.

PHP Code:
/**
 * Checks if the given string is an integer (Supports negative values)
 *
 * @param szString     Input string
 * @return             Boolean
 */
stock bool IsStringNumber(const char[] strint nBase=10) {
    
int result;
    return 
StringToIntEx(strresultnBase) == strlen(str);
}

/**
 * Checks if the given string is a float (Supports negative values)
 *
 * @param szString     Input string
 * @return             Boolean
 */
stock bool IsStringFloat(const char[] str) {
    
float result;
    return 
StringToFloatEx(strresult) == strlen(str) && FindCharInString(str'.') != -1;
}

/**
 * Converts the given string to lower case
 *
 * @param szString     Input string for conversion and also the output
 * @return             void
 */
stock void StringToLowerCase(char[] szInput) {
    
int iIterator 0;
    
    while (
szInput[iIterator] != EOS) {
        if (!
IsCharLower(szInput[iIterator])) szInput[iIterator] = CharToLower(szInput[iIterator]);
        else 
szInput[iIterator] = szInput[iIterator];
        
        
iIterator++;
    }
    
    
szInput[iIterator 1] = EOS;
}

/**
 * Converts the given string to upper case
 *
 * @param szString     Input string for conversion and also the output
 * @return             void
 */
stock void StringToUpperCase(char[] szInput) {
    
int iIterator 0;
    
    while (
szInput[iIterator] != EOS) {
        if (!
IsCharUpper(szInput[iIterator])) szInput[iIterator] = CharToUpper(szInput[iIterator]);
        else 
szInput[iIterator] = szInput[iIterator];
        
        
iIterator++;
    }
    
    
szInput[iIterator 1] = EOS;
}

/**
 * Finds the position (index) of character in the given string (A wrapper around FindCharInString)
 *
 * @param szString     Input string
 * @param szString     Input character
 * @param szString     Do we need the last index (Optional, default: false)
 * @return             Integer, index of the found character (returns -1 if the character was not found)
 */
stock int IndexOfChar(const char[] szText, const char cCharacterbool bLast false) {
    return 
FindCharInString(szTextcCharacterbLast);
}

/**
 * Finds the last position (index) of character in the given string (A wrapper around IndexOfChar)
 *
 * @param szString     Input string
 * @param szString     Input character
 * @return             Integer, index of the found character. (returns -1 if the character was not found)
 */
stock int LastIndexOfChar(const char[] szText, const char cCharacter) {
    return 
IndexOfChar(szTextcCharactertrue);
}

/**
 * Copies the input string into the output string until it reaches the given character
 * 
 * @param szInput           Input string
 * @param szOutput          Output string
 * @param iOutputLength     Output max length
 * @param cCharacter        Character
 * 
 * @return                  void
*/
stock void CopyC(const char[] szInputchar[] szOutputint iOutputLengthchar cCharacter) {
    
int iInputIteratoriOutputIterator;
    
    while(
szInput[iInputIterator] != EOS && iOutputIterator iOutputLength && szInput[iInputIterator] != cCharacter)
        
szOutput[iOutputIterator ++] = szInput[iInputIterator ++];
    
    
szOutput[iOutputIterator] = EOS;

Edit: Changed the functions to wrap some existing ones.
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Last edited by milutinke; 04-10-2020 at 19:18.
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JoinedSenses
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Join Date: Sep 2013
Old 04-05-2020 , 22:53   Re: String Manipulation Functions
Reply With Quote #2

Code:
// Fuzzy search
stock int FuzzyCompare(const char[] needle, const char[] haystack) {
	int hlen = strlen(haystack);
	int nlen = strlen(needle);

	if (nlen > hlen) {
		return false;
	}
	if (nlen == hlen) {
		return strcmp(needle, haystack) == 0;
	}

	int n = 0;
	int h = 0;
	int p = 0;

	for (; n < nlen; n++) {
		int nch = needle[n];

		while (h < hlen) {
			if (nch == haystack[h]) {
				h++;
				p++;
				break;
			}
			h++;
		}
	}

	return (p == nlen);
}

enum DataType {
	DATAINT,
	DATAFLOAT,
	DATASTRING
}

// checks if input is float, int, or string
stock DataType CheckType(const char[] input, int len) {
	if (!input[0] || !len) {
		return DATASTRING;
	}

	int numbers = 0;
	int dot = 0;
	char c;
	for (int i = (input[0] == '-'); i < len; i++) {
		c = input[i];
		if (IsCharNumeric(c)) {
			numbers++;
		}
		else if (c == '.' && !dot) {
			dot++
		}
		else if (!c) {
			break;
		}
		else {
			return DATASTRING;
		}
	}

	return dot ? DATAFLOAT : DATAINT;
}

stock void HexToRGB(const char[] hex, int rgb[3]) {
	int hexInt = StringToInt(hex, 16);
	rgb[0] = ((hexInt >> 16) & 0xFF);
	rgb[1] = ((hexInt >> 8) & 0xFF);
	rgb[2] = ((hexInt >> 0) & 0xFF);
}

stock void RGBToHexStr(int rgb[3], char[] hexstr, int size) {
	int hex; 
	hex |= ((rgb[0] & 0xFF) << 16);
	hex |= ((rgb[1] & 0xFF) <<  8);
	hex |= ((rgb[2] & 0xFF) <<  0);

	Format(hexstr, size, "%6X", hex);
}
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Last edited by JoinedSenses; 04-05-2020 at 22:54.
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milutinke
AlliedModders Donor
Join Date: Jun 2012
Location: Serbia
Old 04-08-2020 , 12:44   Re: String Manipulation Functions
Reply With Quote #3

Added copyc and improved StringToUpperCase and StringToLowerCase

PHP Code:
/**
 * Copies the input string into the output string until it reaches the given character
 * 
 * @param szInput           Input string
 * @param szOutput          Output string
 * @param iOutputLength     Output max length
 * @param cCharacter        Character
 * 
 * @return                  void
*/
stock void CopyC(const char[] szInputchar[] szOutputint iOutputLengthchar cCharacter) {
    
int iInputIteratoriOutputIterator;
    
    while(
szInput[iInputIterator] != EOS && iOutputIterator iOutputLength && szInput[iInputIterator] != cCharacter)
        
szOutput[iOutputIterator ++] = szInput[iInputIterator ++];
    
    
szOutput[iOutputIterator] = EOS;

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Last edited by milutinke; 04-10-2020 at 19:10.
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