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@ -44,15 +44,16 @@ static const char * const g_pcHex = "0123456789abcdef";
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//*****************************************************************************
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//*****************************************************************************
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//
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//
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//! A simple sprintf function supporting \%c, \%d, \%s, \%u, \%x, and \%X.
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//! A simple vsnprintf function supporting \%c, \%d, \%s, \%u, \%x, and \%X.
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//!
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//!
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//! \param pcBuf is the buffer where the converted string is stored.
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//! \param pcBuf points to the buffer where the converted string is stored.
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//! \param ulSize is the size of the buffer.
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//! \param pcString is the format string.
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//! \param pcString is the format string.
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//! \param ... are the optional arguments, which depend on the contents of the
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//! \param vaArgP is the list of optional arguments, which depend on the
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//! format string.
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//! contents of the format string.
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//!
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//!
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//! This function is very similar to the C library <tt>sprintf()</tt> function.
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//! This function is very similar to the C library <tt>vsnprintf()</tt>
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//! Only the following formatting characters are supported:
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//! function. Only the following formatting characters are supported:
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//!
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//!
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//! - \%c to print a character
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//! - \%c to print a character
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//! - \%d to print a decimal value
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//! - \%d to print a decimal value
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@ -75,18 +76,29 @@ static const char * const g_pcHex = "0123456789abcdef";
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//! the format string. For example, if an integer was passed where a string
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//! the format string. For example, if an integer was passed where a string
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//! was expected, an error of some kind will most likely occur.
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//! was expected, an error of some kind will most likely occur.
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//!
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//!
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//! The caller must ensure that the buffer pcBuf is large enough to hold the
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//! The \b ulSize parameter limits the number of characters that will be
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//! entire converted string, including the null termination character.
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//! stored in the buffer pointed to by \b pcBuf to prevent the possibility
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//! of a buffer overflow. The buffer size should be large enough to hold
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//! the expected converted output string, including the null termination
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//! character.
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//!
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//!
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//! \return None.
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//! The function will return the number of characters that would be
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//! converted as if there were no limit on the buffer size. Therefore
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//! it is possible for the function to return a count that is greater than
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//! the specified buffer size. If this happens, it means that the output
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//! was truncated.
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//!
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//! \return the number of characters that were to be stored, not including
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//! the NULL termination character, regardless of space in the buffer.
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//
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//
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//*****************************************************************************
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//*****************************************************************************
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int
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int
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uvsnprintf(char *pcBuf, unsigned long ulSize, const char *pcString,
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uvsnprintf(char *pcBuf, unsigned long ulSize, const char *pcString,
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va_list vaArgP)
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va_list vaArgP)
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{
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{
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unsigned long ulIdx, ulValue, ulPos, ulCount, ulBase;
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unsigned long ulIdx, ulValue, ulCount, ulBase;
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char *pcStr, cFill, *pcOriginalBuf = pcBuf;
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char *pcStr, cFill;
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int iConvertCount = 0;
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//
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//
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// Check the arguments.
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// Check the arguments.
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@ -104,10 +116,14 @@ uvsnprintf(char *pcBuf, unsigned long ulSize, const char *pcString,
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}
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}
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//
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//
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// Loop while there are more characters in the string, and
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// Initialize the count of characters converted.
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// there is more room in the destination buffer.
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//
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iConvertCount = 0;
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//
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// Loop while there are more characters in the format string.
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//
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//
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while(*pcString && ulSize)
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while(*pcString)
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{
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{
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//
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//
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// Find the first non-% character, or the end of the string.
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// Find the first non-% character, or the end of the string.
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@ -118,32 +134,32 @@ uvsnprintf(char *pcBuf, unsigned long ulSize, const char *pcString,
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}
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}
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//
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//
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// Limit the number of characters that can be copied to the
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// Write this portion of the string to the output buffer. If
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// space remaining in the buffer.
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// there are more characters to write than there is space in the
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// buffer, then only write as much as will fit in the buffer.
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//
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//
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if(ulIdx > ulSize)
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if(ulIdx > ulSize)
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{
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{
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ulIdx = ulSize;
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strncpy(pcBuf, pcString, ulSize);
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pcBuf += ulSize;
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ulSize = 0;
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}
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}
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else
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//
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{
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// Write this portion of the string and update the buffer pointer.
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//
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strncpy(pcBuf, pcString, ulIdx);
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strncpy(pcBuf, pcString, ulIdx);
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pcBuf += ulIdx;
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pcBuf += ulIdx;
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ulSize -= ulIdx;
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}
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//
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//
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// Update the size limit, and check to see if the buffer
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// Update the conversion count. This will be the number of
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// limit is reached.
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// characters that should have been written, even if there was
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// not room in the buffer.
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//
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//
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ulSize -= ulIdx;
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iConvertCount += ulIdx;
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if(ulSize == 0)
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{
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break;
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}
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//
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//
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// Skip the portion of the string that was written.
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// Skip the portion of the format string that was written.
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//
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//
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pcString += ulIdx;
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pcString += ulIdx;
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@ -222,14 +238,19 @@ again:
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ulValue = va_arg(vaArgP, unsigned long);
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ulValue = va_arg(vaArgP, unsigned long);
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//
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//
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// Print out the character.
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// Copy the character to the output buffer, if
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// there is room. Update the buffer size remaining.
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//
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//
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if(ulSize != 0)
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{
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*pcBuf++ = (char)ulValue;
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*pcBuf++ = (char)ulValue;
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ulSize--;
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}
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//
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//
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// Decrement the buffer limit.
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// Update the conversion count.
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//
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//
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ulSize--;
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iConvertCount++;
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//
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//
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// This command has been handled.
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// This command has been handled.
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@ -247,30 +268,24 @@ again:
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//
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//
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ulValue = va_arg(vaArgP, unsigned long);
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ulValue = va_arg(vaArgP, unsigned long);
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//
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// Reset the buffer position.
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//
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ulPos = 0;
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//
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//
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// If the value is negative, make it positive and stick a
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// If the value is negative, make it positive and stick a
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// minus sign in the beginning of the buffer.
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// minus sign in the beginning of the buffer.
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//
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//
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if((long)ulValue < 0)
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if((long)ulValue < 0)
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{
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{
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*pcBuf++ = '-';
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ulPos++;
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ulValue = -(long)ulValue;
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ulValue = -(long)ulValue;
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//
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if(ulSize != 0)
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// Decrement the buffer size limit and check
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// if the limit is reached.
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//
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ulSize--;
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if(ulSize == 0)
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{
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{
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break;
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*pcBuf++ = '-';
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ulSize--;
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}
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}
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//
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// Update the conversion count.
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//
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iConvertCount++;
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}
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}
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//
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//
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@ -302,24 +317,29 @@ again:
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}
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}
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//
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//
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// Limit the number of characters that can be copied to the
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// Copy the string to the output buffer. Only copy
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// space remaining in the buffer.
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// as much as will fit in the buffer. Update the
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// output buffer pointer and the space remaining.
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//
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//
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if(ulIdx > ulSize)
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if(ulIdx > ulSize)
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{
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{
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ulIdx = ulSize;
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strncpy(pcBuf, pcStr, ulSize);
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pcBuf += ulSize;
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ulSize = 0;
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}
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}
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else
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//
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{
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// Write the string and update the buffer pointer.
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//
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strncpy(pcBuf, pcStr, ulIdx);
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strncpy(pcBuf, pcStr, ulIdx);
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pcBuf += ulIdx;
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pcBuf += ulIdx;
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ulSize -= ulIdx;
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}
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//
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//
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// Decrement the buffer size limit.
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// Update the conversion count. This will be the number of
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// characters that should have been written, even if there
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// was not room in the buffer.
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//
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//
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ulSize -= ulIdx;
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iConvertCount += ulIdx;
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//
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//
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//
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//
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@ -338,11 +358,6 @@ again:
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//
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//
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ulValue = va_arg(vaArgP, unsigned long);
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ulValue = va_arg(vaArgP, unsigned long);
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//
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// Reset the buffer position.
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//
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ulPos = 0;
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//
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//
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// Set the base to 10.
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// Set the base to 10.
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//
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//
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@ -367,11 +382,6 @@ again:
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//
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//
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ulValue = va_arg(vaArgP, unsigned long);
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ulValue = va_arg(vaArgP, unsigned long);
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//
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// Reset the buffer position.
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//
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ulPos = 0;
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//
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//
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// Set the base to 16.
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// Set the base to 16.
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//
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//
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@ -397,18 +407,20 @@ convert:
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{
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{
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for(ulCount--; ulCount; ulCount--)
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for(ulCount--; ulCount; ulCount--)
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{
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{
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*pcBuf++ = cFill;
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ulPos++;
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//
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//
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// Decrement buffer size and check to see if
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// Copy the character to the output buffer if
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// buffer limit is reached.
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// there is room.
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//
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//
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ulSize--;
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if(ulSize != 0)
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if(ulSize == 0)
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{
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{
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break;
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*pcBuf++ = cFill;
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ulSize--;
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}
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}
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//
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|
|
// Update the conversion count.
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
iConvertCount++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
@ -417,18 +429,20 @@ convert:
|
|
|
|
//
|
|
|
|
//
|
|
|
|
for(; ulIdx; ulIdx /= ulBase)
|
|
|
|
for(; ulIdx; ulIdx /= ulBase)
|
|
|
|
{
|
|
|
|
{
|
|
|
|
*pcBuf++ = g_pcHex[(ulValue / ulIdx) % ulBase];
|
|
|
|
|
|
|
|
ulPos++;
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// Decrement buffer size and check to see if
|
|
|
|
// Copy the character to the output buffer if
|
|
|
|
// buffer limit is reached.
|
|
|
|
// there is room.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
ulSize--;
|
|
|
|
if(ulSize != 0)
|
|
|
|
if(ulSize == 0)
|
|
|
|
|
|
|
|
{
|
|
|
|
{
|
|
|
|
break;
|
|
|
|
*pcBuf++ = g_pcHex[(ulValue / ulIdx) % ulBase];
|
|
|
|
|
|
|
|
ulSize--;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
// Update the conversion count.
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
iConvertCount++;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
//
|
|
|
|
@ -445,8 +459,16 @@ convert:
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// Simply write a single %.
|
|
|
|
// Simply write a single %.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
|
|
|
|
if(ulSize != 0)
|
|
|
|
|
|
|
|
{
|
|
|
|
*pcBuf++ = pcString[-1];
|
|
|
|
*pcBuf++ = pcString[-1];
|
|
|
|
ulSize--;
|
|
|
|
ulSize--;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
// Update the conversion count.
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
iConvertCount++;
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// This command has been handled.
|
|
|
|
// This command has been handled.
|
|
|
|
@ -462,12 +484,23 @@ convert:
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// Indicate an error.
|
|
|
|
// Indicate an error.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
if(ulSize > 5)
|
|
|
|
if(ulSize >= 5)
|
|
|
|
{
|
|
|
|
{
|
|
|
|
strncpy(pcBuf, "ERROR", 5);
|
|
|
|
strncpy(pcBuf, "ERROR", 5);
|
|
|
|
pcBuf += 5;
|
|
|
|
pcBuf += 5;
|
|
|
|
ulSize -= 5;
|
|
|
|
ulSize -= 5;
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
else
|
|
|
|
|
|
|
|
{
|
|
|
|
|
|
|
|
strncpy(pcBuf, "ERROR", ulSize);
|
|
|
|
|
|
|
|
pcBuf += ulSize;
|
|
|
|
|
|
|
|
ulSize = 0;
|
|
|
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
// Update the conversion count.
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
iConvertCount += 5;
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// This command has been handled.
|
|
|
|
// This command has been handled.
|
|
|
|
@ -482,7 +515,7 @@ convert:
|
|
|
|
// Null terminate the string in the buffer.
|
|
|
|
// Null terminate the string in the buffer.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
*pcBuf = 0;
|
|
|
|
*pcBuf = 0;
|
|
|
|
return ( int ) pcBuf - ( int ) pcOriginalBuf;
|
|
|
|
return(iConvertCount);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//*****************************************************************************
|
|
|
|
//*****************************************************************************
|
|
|
|
@ -521,13 +554,15 @@ convert:
|
|
|
|
//! The caller must ensure that the buffer pcBuf is large enough to hold the
|
|
|
|
//! The caller must ensure that the buffer pcBuf is large enough to hold the
|
|
|
|
//! entire converted string, including the null termination character.
|
|
|
|
//! entire converted string, including the null termination character.
|
|
|
|
//!
|
|
|
|
//!
|
|
|
|
//! \return None.
|
|
|
|
//! \return The count of characters that were written to the output buffer,
|
|
|
|
|
|
|
|
//! not including the NULL termination character.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
//*****************************************************************************
|
|
|
|
//*****************************************************************************
|
|
|
|
void
|
|
|
|
int
|
|
|
|
usprintf(char *pcBuf, const char *pcString, ...)
|
|
|
|
usprintf(char *pcBuf, const char *pcString, ...)
|
|
|
|
{
|
|
|
|
{
|
|
|
|
va_list vaArgP;
|
|
|
|
va_list vaArgP;
|
|
|
|
|
|
|
|
int iRet;
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// Start the varargs processing.
|
|
|
|
// Start the varargs processing.
|
|
|
|
@ -538,12 +573,17 @@ usprintf(char *pcBuf, const char *pcString, ...)
|
|
|
|
// Call vsnprintf to perform the conversion. Use a
|
|
|
|
// Call vsnprintf to perform the conversion. Use a
|
|
|
|
// large number for the buffer size.
|
|
|
|
// large number for the buffer size.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
uvsnprintf(pcBuf, 0xffff, pcString, vaArgP);
|
|
|
|
iRet = uvsnprintf(pcBuf, 0xffff, pcString, vaArgP);
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// End the varargs processing.
|
|
|
|
// End the varargs processing.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
va_end(vaArgP);
|
|
|
|
va_end(vaArgP);
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
// Return the conversion count.
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
return(iRet);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//*****************************************************************************
|
|
|
|
//*****************************************************************************
|
|
|
|
@ -584,13 +624,20 @@ usprintf(char *pcBuf, const char *pcString, ...)
|
|
|
|
//! buffer \b pcBuf. One space is reserved in the buffer for the null
|
|
|
|
//! buffer \b pcBuf. One space is reserved in the buffer for the null
|
|
|
|
//! termination character.
|
|
|
|
//! termination character.
|
|
|
|
//!
|
|
|
|
//!
|
|
|
|
//! \return None.
|
|
|
|
//! The function will return the number of characters that would be
|
|
|
|
|
|
|
|
//! converted as if there were no limit on the buffer size. Therefore
|
|
|
|
|
|
|
|
//! it is possible for the function to return a count that is greater than
|
|
|
|
|
|
|
|
//! the specified buffer size. If this happens, it means that the output
|
|
|
|
|
|
|
|
//! was truncated.
|
|
|
|
|
|
|
|
//!
|
|
|
|
|
|
|
|
//! \return the number of characters that were to be stored, not including
|
|
|
|
|
|
|
|
//! the NULL termination character, regardless of space in the buffer.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
//*****************************************************************************
|
|
|
|
//*****************************************************************************
|
|
|
|
int
|
|
|
|
int
|
|
|
|
usnprintf(char *pcBuf, unsigned long ulSize, const char *pcString, ...)
|
|
|
|
usnprintf(char *pcBuf, unsigned long ulSize, const char *pcString, ...)
|
|
|
|
{
|
|
|
|
{
|
|
|
|
int iReturn;
|
|
|
|
int iRet;
|
|
|
|
|
|
|
|
|
|
|
|
va_list vaArgP;
|
|
|
|
va_list vaArgP;
|
|
|
|
|
|
|
|
|
|
|
|
@ -602,14 +649,17 @@ int iReturn;
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// Call vsnprintf to perform the conversion.
|
|
|
|
// Call vsnprintf to perform the conversion.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
iReturn = uvsnprintf(pcBuf, ulSize, pcString, vaArgP);
|
|
|
|
iRet = uvsnprintf(pcBuf, ulSize, pcString, vaArgP);
|
|
|
|
|
|
|
|
|
|
|
|
//
|
|
|
|
//
|
|
|
|
// End the varargs processing.
|
|
|
|
// End the varargs processing.
|
|
|
|
//
|
|
|
|
//
|
|
|
|
va_end(vaArgP);
|
|
|
|
va_end(vaArgP);
|
|
|
|
|
|
|
|
|
|
|
|
return iReturn;
|
|
|
|
//
|
|
|
|
|
|
|
|
// Return the conversion count.
|
|
|
|
|
|
|
|
//
|
|
|
|
|
|
|
|
return(iRet);
|
|
|
|
}
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
|
|
//*****************************************************************************
|
|
|
|
//*****************************************************************************
|
|
|
|
|
Richard Barry
18 years ago