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dl_str.cpp
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dl_str.cpp
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/*===========================================================================
*
* File: DL_Str.CPP
* Author: Dave Humphrey ([email protected])
* Created On: Saturday, May 05, 2001
*
* Comtains implementation of string related functions for Dave's Library
* of common code.
*
* Version History
* -------------------------------------------------------------------------
* 2 December 2002 (Dave Humphrey)
* - Moved from regular char to TCHAR type to support wide characters
* under Windows. Successfully tested.
*
* 22 Jan 2003 (Dave Humphrey)
* - Added the IsStringPrint() function.
*
* 2 October 2003
* - Made the vsnprintf() function available under Borland.
*
* 4 January 2003
* - StringToBoolean() modified to convert Yes/No values.
*
*=========================================================================*/
/* Include Files */
#include "dl_str.h"
#include "dl_chr.h"
#include <ctype.h>
/*===========================================================================
*
* Begin Local Variable Definitions
*
*=========================================================================*/
DEFINE_FILE("dl_str.cpp");
/*===========================================================================
* End of Local Variable Definitions
*=========================================================================*/
/*===========================================================================
*
* Function - size_t CountSubstrings (pSourceString, pSearchString);
*
* Counts the number of times pSearchString occurs in pSourceString.
* ASSERTs if any input is invalid. Supports finding of overlapping
* search strings, for example, a count of strings "yy" in string "yyyyyy"
* yields 5 (rather than just 3 if it didn't support overlapping strings).
*
*=========================================================================*/
size_t CountSubstrings (const TCHAR* pSourceString, const TCHAR* pSearchString) {
DEFINE_FUNCTION("CountSubstrings()");
size_t Count = 0;
TCHAR* pFind;
/* Ensure valid input */
ASSERT(pSourceString != NULL && pSearchString != NULL);
pFind = (TCHAR *)TSTRSTR(pSourceString, pSearchString);
while (pFind != NULL) {
Count++;
pFind = TSTRSTR(pFind+1, pSearchString);
}
return (Count);
}
/*===========================================================================
* End of Function CountSubstrings()
*=========================================================================*/
/*===========================================================================
*
* Function - bool IsStringFloat (pString);
*
* Returns TRUE if the string is composed only of whitespace and numbers
* from 0 to 9 and one '.'.
*
*=========================================================================*/
bool IsStringFloat (const TCHAR* pString) {
DEFINE_FUNCTION("IsStringFloat()");
/* Ensure valid input */
ASSERT(pString != NULL);
/* Parse string character by character */
while (*pString != NULL_CHAR) {
if (*pString == '.') { pString++; break; }
if (!TISSPACE(*pString) && !TISDIGIT(*pString)) return (false);
pString++;
}
while (*pString != NULL_CHAR) {
if (!TISSPACE(*pString) && !TISDIGIT(*pString)) return (false);
pString++;
}
return (true);
}
/*===========================================================================
* End of Function IsStringFloat()
*=========================================================================*/
/*===========================================================================
*
* Function - bool IsStringNumber (pString);
*
* Returns TRUE if the string is composed only of whitespace and numbers
* from 0 to 9.
*
*=========================================================================*/
bool IsStringNumber (const TCHAR* pString) {
DEFINE_FUNCTION("IsStringNumber()");
/* Ensure valid input */
ASSERT(pString != NULL);
/* Parse string character by character */
while (*pString != NULL_CHAR) {
if (!TISSPACE(*pString) && !TISDIGIT(*pString)) return (false);
pString++;
}
return (true);
}
/*===========================================================================
* End of Function IsStringNumber()
*=========================================================================*/
/*===========================================================================
*
* Function - bool IsStringDigit (pString);
*
* Returns TRUE if the string is composed only of decimal numbers 0 to 9.
*
*=========================================================================*/
bool IsStringDigit (const TCHAR* pString) {
DEFINE_FUNCTION("IsStringDigit()");
/* Ensure valid input */
ASSERT(pString != NULL);
/* Parse string character by character */
while (*pString != NULL_CHAR) {
if (!TISDIGIT(*pString)) return (false);
pString++;
}
return (true);
}
/*===========================================================================
* End of Function IsStringDigit()
*=========================================================================*/
/*===========================================================================
*
* Function - bool IsStringPrint (pString);
*
* Returns TRUE if the string is composed only of printable characters.
*
*=========================================================================*/
bool IsStringPrint (const TCHAR* pString) {
DEFINE_FUNCTION("IsStringPrint()");
/* Ensure valid input */
ASSERT(pString != NULL);
/* Parse string character by character */
while (*pString != NULL_CHAR) {
if (!TISPRINT(*pString)) return (false);
pString++;
}
return (true);
}
/*===========================================================================
* End of Function IsStringPrint()
*=========================================================================*/
/*===========================================================================
*
* Function - TCHAR* ltrim (TCHAR* pString);
*
* Strips all space characters from the left side of the given string,
* returning a pointer to the first non-whitespace character.
* Space characters include spaces, tabs and line feeds a defined by
* the isspace() function. ASSERTs if given invalid input.
*
*=========================================================================*/
TCHAR* ltrim (TCHAR* pString) {
DEFINE_FUNCTION("ltrim()");
size_t Index = 0;
/* Ensure valid input */
ASSERT(pString != NULL);
/* Ignore any spaces or TABs until end of string */
while (pString[Index] != '\0' && TISSPACE(pString[Index])) {
Index++;
}
/* Return pointer to the first non-whitespace TCHAR */
return (pString + Index);
}
/*===========================================================================
* End of Function ltrim()
*=========================================================================*/
/*===========================================================================
*
* Function - TCHAR* rtrim (TCHAR* pString);
*
* Strips all space characters from the right side of the given string,
* returning a pointer to the modified string. Space characters include
* spaces, tabs and line feeds a defined by the isspace() function.
* ASSERTs if given invalid input.
*
*=========================================================================*/
TCHAR* rtrim (TCHAR* pString) {
DEFINE_FUNCTION("rtrim()");
size_t Index;
/* Ensure valid input */
ASSERT(pString != NULL);
/* Start at the end of the string */
Index = TSTRLEN(pString);
while (Index != 0) {
Index--;
/* Terminate string and return if non-whitespace found */
if (!TISSPACE(pString[Index])) {
pString[Index + 1] = NULL_CHAR;
return (pString);
}
}
/* Return an empty string */
*pString = NULL_CHAR;
return (pString);
}
/*===========================================================================
* End of Function rtrim()
*=========================================================================*/
/*===========================================================================
*
* Function - bool SeperateVarValue (ppVariable, ppValue, pString,
SeperatorChar = '=',
CommentChar = '#');
*
* Takes the input string and attempts to seperate it into a variable/value
* pair. If the CommentChar is non-NULL, everything after the last comment
* character in a line is ignored. The string is then split into two
* where the first SeperatorChar is found. Whitespace is trimmed and the
* results stored in ppVariable and ppValue. Returns TRUE on success.
* FALSE is returned if no variable/value pair was found (ppVariable then
* points to the string with no comments and whitespace trimmed).
* ASSERTs if given invalid input.
*
*=========================================================================*/
bool SeperateVarValue (TCHAR** ppVariable, TCHAR** ppValue, TCHAR* pString, const TCHAR SeperatorChar, const TCHAR CommentChar) {
DEFINE_FUNCTION("SeperateVarValue()");
TCHAR* pParse;
/* Ensure valid input */
ASSERT(ppVariable != NULL && ppValue != NULL && pString != NULL);
ASSERT(SeperatorChar != NULL_CHAR);
/* Remove any comments from string, if required */
if (CommentChar != NULL_CHAR) chrrtrunc(pString, CommentChar);
/* Look for the seperator TCHAR */
*ppVariable = trim(pString);
pParse = TSTRCHR(pString, SeperatorChar);
if (pParse == NULL) return (false);
*pParse = NULL_CHAR;
/* Remove trailing spaces from variable */
rtrim(*ppVariable);
/* Remove leading spaces from the value */
*ppValue = ltrim(pParse + 1);
return (true);
}
/*===========================================================================
* End of Function SeperateVarValue()
*=========================================================================*/
/*===========================================================================
*
* Function - bool SeperateVarValueQ (ppVariable, ppValue, pString,
SeperatorChar, CommentChar);
*
* Same as the SeperateVarValue() function but handles values that are
* surrounded by double quotes ("").
*
*=========================================================================*/
bool SeperateVarValueQ (TCHAR** ppVariable, TCHAR** ppValue, TCHAR* pString, const TCHAR SeperatorChar, const TCHAR CommentChar) {
DEFINE_FUNCTION("SeperateVarValueQ()");
TCHAR* pParse;
bool FoundSep;
bool FoundQuote;
/* Ensure valid input */
ASSERT(ppVariable != NULL && ppValue != NULL && pString != NULL);
ASSERT(SeperatorChar != NULL_CHAR);
pParse = pString;
FoundSep = false;
FoundQuote = false;
while (*pParse != NULL_CHAR) {
if (*pParse == SeperatorChar && !FoundSep) {
*pParse = NULL_CHAR;
FoundSep = true;
*ppVariable = trim(pString);
*ppValue = pParse + 1;
}
else if (FoundSep && *pParse == '"') {
if (FoundQuote)
*pParse = NULL_CHAR;
else
*ppValue = pParse + 1;
FoundQuote = !FoundQuote;
}
else if (!FoundQuote && *pParse == CommentChar) {
*pParse = NULL_CHAR;
break;
}
pParse++;
}
if (!FoundSep) {
*ppVariable = trim(pString);
*ppValue = NULL;
return (false);
}
else {
*ppValue = trim(*ppValue);
}
return (true);
}
/*===========================================================================
* End of Function SeperateVarValueQ()
*=========================================================================*/
/*===========================================================================
*
* Function - bool StringToBoolean (pString);
*
* Returns the bool equivalent of a string. For use when it doesn't
* matter if the string does not represent a bool string.
*
* See Also: StringToBoolean (bool&, TCHAR*);
*
*=========================================================================*/
bool StringToBoolean (const TCHAR* pString) {
//DEFINE_FUNCTION("StringToBoolean(TCHAR*)");
bool Flag = FALSE;
StringToBoolean(Flag, pString);
return (Flag);
}
/*===========================================================================
* End of Function StringToBoolean()
*=========================================================================*/
/*===========================================================================
*
* Function - bool StringToBoolean (Flag, pString);
*
* Atempts to convert a string to a bool TRUE/FALSE value, returning
* the result in the Flag referenced variable. Returns TRUE if the
* string was successfully parsed to a bool, or FALSE otherwise.
* ASSERTs if passed invalid input.
* 1. Checks string against 'TRUE' or 'FALSE', case insensitive
* 2. Checks string against 'YES' or 'NO', case insensitive
* 3. Checks for a zero/non-zero integral value.
* 4. If conversion to a number failed, FALSE is returned.
*
* See Also: StringToBoolean (TCHAR*);
*
*=========================================================================*/
bool StringToBoolean (bool& Flag, const TCHAR* pString) {
DEFINE_FUNCTION("StringToBoolean(bool&, TCHAR*)");
TCHAR* pError;
long Result;
/* Make sure the string is valid */
ASSERT(pString != NULL);
/* See if the string contains explicit TRUE/FALSE strings */
if (TSTRICMP(pString, _T("TRUE")) == 0 || TSTRICMP(pString, _T("YES")) == 0) {
Flag = TRUE;
return (true);
}
else if (TSTRICMP(pString, _T("FALSE")) == 0 || TSTRICMP(pString, _T("NO")) == 0) {
Flag = FALSE;
return (true);
}
/* Special case for an empty string */
else if (*pString == NULL_CHAR) {
return (false);
}
/* Convert the string to a number as a last resort */
Result = TSTRTOL(pString, &pError, 0);
if (*pError != NULL_CHAR) return (false);
Flag = (bool) (Result == 0) ? false : true;
return (false);
}
/*===========================================================================
* End of Function StringToBoolean()
*=========================================================================*/
/*===========================================================================
*
* Function - bool StringChanged (pString1, pString2, CaseSensitive);
*
* Smart string compare which returns TRUE if the two strings are different.
* Handles NULL cases and case sensitivity. Default is case insensitive.
*
*=========================================================================*/
bool StringChanged (const TCHAR* pString1, const TCHAR* pString2, const bool CaseSensitive) {
//DEFINE_FUNCTION("StringChanged()");
/* Check for NULL strings */
if (pString1 == NULL && pString2 == NULL) return (FALSE);
if (pString1 == NULL) return (TRUE);
if (pString2 == NULL) return (TRUE);
/* Compare the two valid strings depending on the case option */
if (CaseSensitive) {
if (TSTRCMP(pString1, pString2) == 0) return (FALSE);
}
else {
if (TSTRICMP(pString1, pString2) == 0) return (FALSE);
}
return (TRUE);
}
/*===========================================================================
* End of Function StringChanged()
*=========================================================================*/
/*===========================================================================
*
* Function - int StringCompare (pString1, pString2, CaseSensitive);
*
* Smart string compare which returns as per strcmp(). Handles NULL cases
* and case sensitivity. Default is case insensitive.
*
*=========================================================================*/
int StringCompare (const TCHAR* pString1, const TCHAR* pString2, const bool CaseSensitive) {
//DEFINE_FUNCTION("StringCompare()");
/* Check for NULL strings */
if (pString1 == NULL && pString2 == NULL) return (0);
if (pString1 == NULL) return (-pString2[0]);
if (pString2 == NULL) return (pString1[0]);
/* Compare the two valid strings depending on the case option */
if (CaseSensitive) {
return TSTRCMP(pString1, pString2);
}
else {
return TSTRICMP(pString1, pString2);
}
}
/*===========================================================================
* End of Function StringChanged()
*=========================================================================*/
/*=========================================================================
*
* Function - size_t strhgt (pString);
*
* Returns the number of lines in the string (seperated by a Line Feed).
* ASSERTs if given invalid input.
*
*=======================================================================*/
size_t strhgt (const TCHAR* pString) {
DEFINE_FUNCTION("strhgt()");
size_t LineCount = 1;
/* Ensure valid input */
ASSERT(pString != NULL);
while (*pString != NULL_CHAR) {
if (*pString == LF_CHAR) LineCount++;
pString++;
}
return (LineCount);
}
/*=========================================================================
* End of Function strhgt()
*=======================================================================*/
/*===========================================================================
*
* Function - TCHAR* stristr (pString, pSearchString);
*
* Returns the first position of the given substring in the string, ignoring
* case. Returns NULL if the substring is not found in the string. ASSERTs
* if given invalid input. Functions the same as the standard TSTRSTR()
* function.
*
*=========================================================================*/
TCHAR* stristr (const TCHAR* pString, const TCHAR* pSearchString) {
DEFINE_FUNCTION("stristr()");
size_t StringIndex = 0;
size_t SearchIndex = 0;
/* Ensure valid input */
ASSERT(pString != NULL && pSearchString != NULL);
/* Special case for an empty search string */
if (*pSearchString == NULL_CHAR) return (NULL);
/* The main search loop */
while (pString[StringIndex] != NULL_CHAR) {
if (TTOUPPER(pString[StringIndex]) == TTOUPPER(pSearchString[SearchIndex])) {
SearchIndex++;
if (pSearchString[SearchIndex] == NULL_CHAR)
return(((TCHAR *)pString) + StringIndex - SearchIndex + 1);
}
else if (SearchIndex != 0) {
StringIndex -= SearchIndex;
SearchIndex = 0;
}
StringIndex++;
}
/* Nothing found... */
return (NULL);
}
/*===========================================================================
* End of Function stristr()
*=========================================================================*/
/*=========================================================================
*
* Function - TCHAR *strnncpy (pDestString, pSourceString, MaxStringLegth);
*
* Just like the standard strncpy function but appends a NUL character
* to the end of the destination if required. Returns a pointer to the
* destination string. ASSERTs if given invalid input.
*
*=======================================================================*/
TCHAR* strnncpy (TCHAR* pDestString, const TCHAR* pSourceString, const size_t MaxStringLength) {
DEFINE_FUNCTION("strnncpy()");
size_t Index = 0;
/* Ensure valid Input */
ASSERT(pDestString != NULL);
if (pSourceString == NULL) {
pDestString[0] = NULL_CHAR;
return (pDestString);
}
/* Start copying */
while (Index < MaxStringLength && *pSourceString != NULL_CHAR) {
pDestString[Index] = *pSourceString;
++pSourceString;
++Index;
}
/* Null terminate */
pDestString[Index] = NULL_CHAR;
return (pDestString);
}
/*=========================================================================
* End of Function strnncpy()
*=======================================================================*/
/*=========================================================================
*
* Function - int strlicmp (pString1, pString2);
*
* Compares the two strings, up to the end of the shortest string,
* with case insensitivity. ASSERTs if given invalid input. Returns
* same values as the TSTRCMP() function:
* < 0 : String1 is less than String2
* = 0 : String1 is the same as String2
* > 0 : String1 is greater than String2
*
*=======================================================================*/
int strlicmp (const TCHAR *pString1, const TCHAR *pString2) {
DEFINE_FUNCTION("strlicmp()");
int StringDifference;
size_t Index = 0;
/* Can't use NULL pointers */
ASSERT(pString1 != NULL && pString2 != NULL);
/* Compare the strings up to end of string */
while (pString1[Index] != NULL_CHAR && pString2[Index] != NULL_CHAR) {
StringDifference = TTOUPPER(pString1[Index]) - TTOUPPER(pString2[Index]);
if (StringDifference != 0) return (StringDifference);
Index++;
}
return (0);
}
/*=========================================================================
* End of Function strlicmp()
*=======================================================================*/
/*===========================================================================
*
* Function - size_t strlinelen (pString);
*
* Returns the number of characters up to the first Line Feed in the
* string, or the end of the string if no CR is found. ASSERTs if input
* is invalid.
*
*=========================================================================*/
size_t strlinelen (const TCHAR* pString) {
DEFINE_FUNCTION("strlinelen()");
size_t Index = 0;
/* Ensure valid input */
ASSERT(pString != NULL);
/* Find end of string or first CR */
while (pString[Index] != NULL_CHAR && pString[Index] != LF_CHAR) {
Index++;
}
return (Index);
}
/*===========================================================================
* End of Function strlinelen()
*=========================================================================*/
/*=========================================================================
*
* Function - TCHAR *strlwr (string);
*
* Converts a string to lowercase. Only used if not available in
* the current system. ASSERTs if given invalid input.
*
*=======================================================================*/
#if !defined(__TURBOC__) && !defined(_WIN32)
TCHAR* strlwr (TCHAR* pString) {
DEFINE_FUNCTION("strlwr()");
size_t Index = 0;
/* Ensure valid input */
ASSERT(pString != NULL);
while (pString[Index] != NULL_CHAR) {
pString[Index] = TTOUPPER(pString[Index]);
Index++;
}
return (pString);
}
#endif
/*=========================================================================
* End of Function strlwr()
*=======================================================================*/
/*=========================================================================
*
* Function - size_t strmaxlinelen (pString);
*
* Finds and returns the length of the longest substring in the string
* separated by Line Feeds. ASSERTs if given invalid input.
*
*=======================================================================*/
size_t strmaxlinelen (const TCHAR* pString) {
DEFINE_FUNCTION("strmaxlinelen()");
size_t LineLength = 0;
size_t MaxLineLength = 0;
/* Ensure valid input */
ASSERT(pString != NULL);
/* Find all lines in string */
while (*pString != NULL_CHAR) {
if (*pString == LF_CHAR) {
if (LineLength > MaxLineLength) MaxLineLength = LineLength;
LineLength = 0;
}
else {
LineLength++;
}
pString++;
}
if (LineLength > MaxLineLength) MaxLineLength = LineLength;
return (MaxLineLength);
}
/*=========================================================================
* End of Function strmaxlinelen()
*=======================================================================*/
/*========================================================================
*
* Function - int strnicmp (pString1, pString2, MaxStringLength);
*
* Compares the two strings, up to the max length characters, and returns
* a value based on their equality (with case insensitivity).
* < 0 : String1 is less than String2
* = 0 : String1 is the same as String2
* > 0 : String1 is greater than String2
* ASSERTs if given invalid inputs. Is only used in systems where a
* similar function is not available.
*
*=======================================================================*/
#if !defined(__TURBOC__) && !defined(_WIN32)
int strnicmp (const TCHAR* pString1, const TCHAR* pString2, const size_t MaxStringLength) {
DEFINE_FUNCTION("strnicmp()");
int StringDiff;
size_t Index = 0;
/* Ensure valid inputs */
ASSERT(pString1 != NULL && pString2 != NULL);
/* Compare the strings up to maxlen or end of string */
while (pString1[Index] != NULL_CHAR &&
pString2[Index] != NULL_CHAR &&
Index < MaxStringLength) {
StringDiff = TTOUPPER(pString1[Index]) - TTOUPPER(pString2[Index]);
if (StringDiff != 0) return (StringDiff);
Index++;
}
if (Index == MaxStringLength) return (0);
return (TTOUPPER(pString1[Index]) - TTOUPPER(pString2[Index]));
}
#endif
/*=========================================================================
* End of Function strnicmp()
*=======================================================================*/
/*=========================================================================
*
* Function - TCHAR* strproper (pString);
*
* Converts the specified string to proper case (first letter in each word
* is capitalized). Returns a pointer to the modified string. ASSERTs
* if given invalid input. Whitespace is defined according to the
* isspace() function.
*
*=======================================================================*/
TCHAR* strproper (TCHAR* pString) {
DEFINE_FUNCTION("strproper()");
TCHAR* pInitialString = pString;
/* Make sure it is a valid string */
ASSERT(pString != NULL);
/* Find the next non-whitespace character */
while (*pString != NULL_CHAR) {
pString = ltrim(pString);
*pString = (TCHAR)TTOUPPER(*pString);
/* Find the next whitespace character */
while (*pString != NULL_CHAR && !TISSPACE(*pString)) {
pString++;
}
}
/* Return the string pointer */
return (pInitialString);
}
/*=========================================================================
* End of Function strproper()
*=======================================================================*/
/*===========================================================================
*
* Function - TCHAR* UnquoteString (pString);
*
* Removes quotes from the beginning/end of the string. The string is
* modified. Returns the start to the unquoted string.
*
*=========================================================================*/
TCHAR* UnquoteString (TCHAR* pString) {
TCHAR* pParse = pString;
TCHAR* pStart = pString;
bool FoundQuote = false;
while (*pParse != NULL_CHAR) {
if (*pParse == '"') {
*pParse = NULL_CHAR;
if (FoundQuote) return (pStart);
FoundQuote = true;
pStart = pParse + 1;
}
pParse++;
}
return (pString);
}
/*===========================================================================
* End of Function UnquoteString()
*=========================================================================*/
/*=========================================================================
*
* Function - TCHAR *strupr (string);
*
* Converts a string to uppercase. Only used if not available in
* the current system. ASSERTs if given invalid input.
*
*=======================================================================*/
#if !defined(__TURBOC__) && !defined(_WIN32)
TCHAR* strupr (TCHAR* pString) {
DEFINE_FUNCTION("strupr()");
size_t Index = 0;
/* Ensure valid input */
ASSERT(pString != NULL);
while (pString[Index] != NULL_CHAR) {
pString[Index] = (TCHAR)TTOUPPER(pString[Index]);
Index++;
}
return (pString);
}
#endif
/*=========================================================================
* End of Function strupr()
*=======================================================================*/
/*===========================================================================
*
* Function - int snprintf (pBuffer, MaxLength, pFormat, ...);
*
* Similar to the sprintf() function which outputs a printf() formatted
* list of arguments to a string buffer, but also limits the number of
* bytes output to the buffer. For systems that have no builtin version
* of a snprintf() function, the function ASSERTs if more than MaxLength
* characters have been output to the buffer. Returns the number of
* bytes output to the string, or negative value on error.
*
* See Also: vsnprintf()
*
*=========================================================================*/
#if !defined(_WIN32)
int snprintf (TCHAR* pBuffer, const size_t MaxLength, const TCHAR* pFormat, ...) {
DEFINE_FUNCTION("vsnprintf()");
va_list Args;
int Result;
/* Ensure valid input */
ASSERT(pBuffer != NULL && pFormat != NULL);
va_start(Args, pFormat);
Result = vsnprintf (pBuffer, MaxLength, pFormat, Args);
va_end(Args);
return (Result);
}
#endif
/*===========================================================================
* End of Function snprintf()
*=========================================================================*/
/*===========================================================================
*
* Function - int vsnprintf (pBuffer, MaxLength, pFormat, Args);
*
* Similar to the function vsprintf() which outputs a variable list of
* arguments to a string buffer, but outputs a maximum of MaxLength bytes
* to the output buffer. In systems that have no builtin vsnprintf()
* type function, the function ASSERTs if more than MaxLength characters
* are output to the buffer. Returns the number of characters output
* to the buffer, not including the terminating NULL character, or a
* negative value on any error.
*
*=========================================================================*/
#if !defined(_WIN32)
int vsnprintf (TCHAR* pBuffer, const size_t MaxLength, const TCHAR* pFormat, va_list Args) {
DEFINE_FUNCTION("vsnprintf()");
int Result;
/* Ensure valid input */
ASSERT(pBuffer != NULL && pFormat != NULL);
/* Windows has a builtin vsnprintf() type function */
#if defined(_WIN32) && !defined(__BCPLUSPLUS__)
Result = _vsntprintf(pBuffer, MaxLength, pFormat, Args);
#else
Result = vsprintf(pBuffer, pFormat, Args);
//ASSERT(Result >= 0 && ((size_t)Result) <= MaxLength);
if (Result > 0 && (size_t)Result > MaxLength) {
ErrorHandler.AddError(ERR_OVERFLOW, "Wrote %d bytes to a maximum buffer size of %u bytes!", Result, MaxLength);
Result = -1;
}
#endif
if (Result < 0) pBuffer[MaxLength] = NULL_CHAR;
return (Result);
}
#endif
/*===========================================================================
* End of Function vsnprintf()
*=========================================================================*/
/*===========================================================================
*
* Begin Module Test Routines
*
* Test routines for the functions in this module. Only defined in
* DEBUG builds.
*
*=========================================================================*/
#if defined(_DEBUG)
/* Turn off compiler warning options */
#if defined(__BCPLUSPLUS__)
#pragma warn -rch
#pragma warn -ccc
#endif
/*===========================================================================
*
* Function - void Test_CountSubstrings (void);
*
* Tests the CountSubstrings() function
* 1. Checks function with a regular search string
* 2. Tests with a string containing overlapping search strings.
* 3. Test empty string case
* 4. Test nosubstrings case
*
*=========================================================================*/
void Test_CountSubstrings (void) {
DEFINE_FUNCTION("Test_CountSubstrings()");
TCHAR TestString[101];
size_t Result;
SystemLog.Printf(stdout, _T("============= Testing CountSubstrings() ===================="));
/* Check function with a regular string */
TSTRCPY(TestString, _T(".....11....11..11...11.11"));
Result = CountSubstrings(TestString, _T("11"));
ASSERT(Result == 5);
/* Check function with string containing overlapping strings */
TSTRCPY(TestString, _T("...1111....111111"));
Result = CountSubstrings(TestString, _T("11"));