CWE-ou-minkata/Sources/Plasma/NucleusLib/pnUtils/pnUtStr.cpp

/*==LICENSE==*

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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
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Additional permissions under GNU GPL version 3 section 7

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*==LICENSE==*/
/*****************************************************************************
*
*   $/Plasma20/Sources/Plasma/NucleusLib/pnUtils/Private/pnUtStr.cpp
*   
***/

#include "pnUtStr.h"


/*****************************************************************************
*
*   Private data
*
***/

// These random values were generated by the radioactive decay based
// random number generator at www.fourmilab.ch
static uint32_t s_hashValue[] = {
    0xc30d2a72, 0x15efaec1, 0xd250c7d9, 0xaf3c60a8,
    0x9608ae8f, 0x452c0e11, 0xb6840ffd, 0x3e36c913,
    0x2864eace, 0x9b0a17d6, 0x108da74b, 0xf2c479c1,
    0x8b4dd597, 0x97199bc0, 0x621f0cce, 0x1658553e,
};


/****************************************************************************
*
*   Internal functions
*
***/
//===========================================================================
template<class chartype>
static unsigned IStrLen (const chartype str[]) {
    unsigned chars = 0;
    for (; *str++; ++chars)
        NULL_STMT;
    return chars;
}

//===========================================================================
template<class chartype>
static void IStrCopy (chartype * dest, const chartype source[], unsigned chars) {
    while ((chars > 1) && ((*dest = *source++) != 0)) {
        --chars;
        ++dest;
    }
    if (chars)
        *dest = 0;
}

//===========================================================================
template<class chartype>
static chartype * IStrDup (const chartype str[]) {
    unsigned chars = IStrLen(str) + 1;
    chartype * buffer = (chartype *)malloc(chars * sizeof(chartype));
    IStrCopy(buffer, str, chars);
    return buffer;
}


//===========================================================================
template<typename chartype>
static unsigned IStrPrintfValidate (chartype * dest, unsigned count, int result) {
    if (!count)
        return 0;
    ASSERT(result <= (int)count);
    if ((result < 0) || (result == (int)count)) {
        dest[count - 1] = 0;
        return count - 1;
    }
    else
        return (unsigned)result;
}

//===========================================================================
template<class chartype>
static int IStrCmp (const chartype str1[], const chartype str2[], unsigned chars) {
    for (; chars--; ++str1, ++str2) {
        if (*str1 != *str2)
            return (*str1 > *str2) ? 1 : -1;
        if (!*str1)
            return 0;
    }
    return 0;
}

//===========================================================================
template<class chartype>
static int IStrCmpI (const chartype str1[], const chartype str2[], unsigned chars) {
    while (chars--) {
        chartype ch1 = CharLowerFast(*str1++);
        chartype ch2 = CharLowerFast(*str2++);
        if (ch1 != ch2)
            return (ch1 > ch2) ? 1 : -1;
        if (!ch1)
            return 0;
    }
    return 0;
}

//===========================================================================
template<class chartype>
static uint32_t IStrHash (const chartype str[], unsigned chars) {
    uint32_t temp0  = 0xE2C15C9D;
    uint32_t temp1  = 0x2170A28A;
    uint32_t result = 0x325D1EAE;
    for (unsigned ch; chars-- && ((ch = (unsigned)*str) != 0); ++str) {
        temp0   = (temp0 << 3) ^ ch;
        temp1  += s_hashValue[temp0 & 0x0F];
        result ^= temp0 + temp1;
    }
    return result;
}

//===========================================================================
template<class chartype>
static uint32_t IStrHashI (const chartype str[], unsigned chars) {
    uint32_t temp0  = 0xE2C15C9D;
    uint32_t temp1  = 0x2170A28A;
    uint32_t result = 0x325D1EAE;
    for (unsigned ch; chars-- && ((ch = (unsigned)*str) != 0); ++str) {
        if ((ch >= 'a') && (ch <= 'z'))
            ch = ch + 'A' - 'a';
        temp0   = (temp0 << 3) ^ ch;
        temp1  += s_hashValue[temp0 & 0x0F];
        result ^= temp0 + temp1;
    }
    return result;
}



/****************************************************************************
*
*   Exported functions
*
***/

//===========================================================================
char * StrDup (const char str[]) {
    return IStrDup(str);
}

//===========================================================================
wchar_t * StrDup (const wchar_t str[]) {
    return IStrDup(str);
}

//===========================================================================
unsigned StrPrintf (char * dest, unsigned count, const char format[], ...) {
    va_list argList;
    va_start(argList, format);
    int result = hsVsnprintf((char *)dest, count, (const char *)format, argList);
    va_end(argList);
    return IStrPrintfValidate(dest, count, result);
}

//===========================================================================
unsigned StrPrintf (wchar_t * dest, unsigned count, const wchar_t format[], ...) {
    va_list argList;
    va_start(argList, format);
    int result = hsVsnwprintf(dest, count, format, argList);
    va_end(argList);
    return IStrPrintfValidate(dest, count, result);
}

//===========================================================================
unsigned StrPrintfV (char * dest, unsigned count, const char format[], va_list args) {
    int result = hsVsnprintf(dest, count, format, args);
    return IStrPrintfValidate(dest, count, result);
}

//===========================================================================
unsigned StrPrintfV (wchar_t * dest, unsigned count, const wchar_t format[], va_list args) {
    int result = hsVsnwprintf(dest, count, format, args);
    return IStrPrintfValidate(dest, count, result);
}

//===========================================================================
int StrCmp (const char str1[], const char str2[], unsigned chars) {
    return IStrCmp(str1, str2, chars);
}

//===========================================================================
int StrCmp (const wchar_t str1[], const wchar_t str2[], unsigned chars) {
    return IStrCmp(str1, str2, chars);
}

//===========================================================================
int StrCmpI (const char str1[], const char str2[], unsigned chars) {
    return IStrCmpI(str1, str2, chars);
}

//===========================================================================
int StrCmpI (const wchar_t str1[], const wchar_t str2[], unsigned chars) {
    return IStrCmpI(str1, str2, chars);
}

//===========================================================================
void StrCopy (char * dest, const char source[], unsigned chars) {
    IStrCopy(dest, source, chars);
}

//===========================================================================
void StrCopy (wchar_t * dest, const wchar_t source[], unsigned chars) {
    IStrCopy(dest, source, chars);
}

//===========================================================================
unsigned StrLen (const char str[]) {
    return IStrLen(str);
}

//===========================================================================
unsigned StrLen (const wchar_t str[]) {
    return IStrLen(str);
}

//===========================================================================
uint32_t StrHash (const char str[], unsigned chars) {
    return IStrHash(str, chars);
}

//===========================================================================
uint32_t StrHash (const wchar_t str[], unsigned chars) {
    return IStrHash(str, chars);
}

//===========================================================================
uint32_t StrHashI (const char str[], unsigned chars) {
    return IStrHashI(str, chars);
}

//===========================================================================
uint32_t StrHashI (const wchar_t str[], unsigned chars) {
    return IStrHashI(str, chars);
}