/*------------------------------------------------------------------------------
function name: itoa
description: converts signed integer to an char array. Valid 'base' in [2;16].
Only base == 10 values are treated as signed.
parameters: value for converting, the output buffer, conversion base
returned value: pointer to the output buffer
------------------------------------------------------------------------------*/
char* itoa (int value, char* buffer, int base)
{
static const char digits [] = "0123456789ABCDEF";
char* tmpBuffer = buffer;
int sign = 0;
int quot, rem;
if ( (base >= 2) && (base <= 16) ) /* check if the base is valid */
{
if (base == 10 && (sign = value) <0) /* check base & sign of value in the tmp copy */
{
value = -value;
}
do /* calculate quotient & reminder */
{
quot = value / base;
rem = value % base;
*buffer ++ = digits[rem]; /* append the reminder to the string */
} while ((value = quot));
if (sign < 0) /* if negative value add a sign */
{
*buffer++ = '-';
}
__reverse(tmpBuffer, buffer - 1); /* reverse the string */
}
*buffer = '\0';
return tmpBuffer;
}
static inline void __reverse(struct bnode *bnode)
{
//树为空，或者遍历到叶子节点为止
if (!bnode || ((!bnode->lchild) && (!bnode->rchild))) {
return;
}
struct bnode *tmp;
tmp = bnode->lchild;
bnode->lchild = bnode->rchild;
bnode->rchild = tmp;
__reverse(bnode->lchild);
__reverse(bnode->rchild);
}
char *itoa(int value, char *buffer, int base)
{
static const char digits[] = "0123456789abcdef";
char *buffer_copy = buffer;
int32_t sign = 0;
int32_t quot, rem;
if ((base >= 2) && (base <= 16)) // is the base valid?
{
if (base == 10 && (sign = value) < 0)// negative value and base == 10? store the copy (sign)
value = -value; // make it positive
do
{
quot = value / base; // calculate quotient and remainder
rem = value % base;
*buffer++ = digits[rem]; // append the remainder to the string
}
while ((value = quot)); // loop while there is something to convert
if (sign < 0) // was the value negative?
*buffer++ = '-'; // append the sign
__reverse(buffer_copy, buffer - 1); // reverse the string
}
*buffer = '\0';
return buffer_copy;
}
/*!
* Előjeles egészet karakter tömbbé konvertál.
* @param[in] value Az átalakítandó egész szám.
* @param[out] buffer Itt keletkezik az eredmény.
* @param[in] base Alap (2; 10; 16 lehet).
* @param[in] decimals Tizedesek száma.
* @param[in] expectedLength Kívánt karakterhosszúság.
* @param[in] padding_char Kitöltő karakter.
* @param[in] prefix Előtag, mely a karakterlánc elejéhez fűződik.
* @param[in] suffix Utótag, mely a karakterlánc végéhez fűződik.
* @return Mutató az eredmény bufferre.
*/
char* itoa (int value, char* buffer, int base, int decimals,
int expectedLength, char padding_char, char * prefix, char * suffix) //, char * prefix, char * suffix
{
static const char digits [] = "0123456789ABCDEF";
char* tmpBuffer = buffer;
int sign = 0;
int quot, rem;
int dec = 1;
int prefLength = 0;
if ( (base >= 2) && (base <= 16) ) /* check if the base is valid */
{
if ( base == 10 && (sign = value) < 0) /* check base & sign of value in the tmp copy */
{
value = -value;
}
while ( suffix && *suffix )
{
*buffer ++ = *suffix;
suffix++;
}
do /* calculate quotient & reminder */
{
quot = value / base;
rem = value % base;
*buffer ++ = digits[rem]; /* append the reminder to the string */
if (decimals == dec)
{
*buffer ++ = '.';
}
dec ++;
} while ( (value = quot) );
if( (sign < base) && (base == 10) && (decimals == 1) )
{
*buffer ++ = '0';
}
if ( sign < 0 ) /* if negative value add a sign */
{
*buffer++ = '-';
}
while ( (prefix) && (*(prefix + prefLength)) )
{
prefLength++;
}
while ( (buffer - tmpBuffer + prefLength) < expectedLength ) // + prefLength
{
*buffer++ = padding_char;
}
while ( prefix && *prefix )
{
*buffer++ = *prefix;
prefix++;
}
__reverse(tmpBuffer, buffer - 1); /* reverse the string */
}
*buffer = '\0';
return tmpBuffer;
}