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callback_printf.c
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callback_printf.c
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/*****************************************************************************\
* *
* FILE NAME: callback_printf.c *
* *
* --------------------------------------------------------------------------- *
* *
* DESCRIPTION: system independent (v)s(n)printf wrapper functions *
* *
* --------------------------------------------------------------------------- *
* *
* COPYRIGHT: (c) 2024 Dipl.-Ing. Klaus Lux (Aachen, Germany) *
* *
* --------------------------------------------------------------------------- *
* *
* ORIGIN: https://github/klux21/callback_printf *
* *
* --------------------------------------------------------------------------- *
* *
* Civil Usage Public License, Version 1.1, January 2024 *
* *
* Redistribution and use in source and binary forms, with or without *
* modification, are permitted provided that the following conditions are met: *
* *
* 1. Redistributions of source code must retain the above copyright *
* notice, this list of conditions, the explanation of terms *
* and the following disclaimer. *
* *
* 2. Redistributions in binary form must reproduce the above copyright *
* notice, this list of conditions and the following disclaimer in the *
* documentation or other materials provided with the distribution. *
* *
* 3. All modified files must carry prominent notices stating that the *
* files have been changed. *
* *
* 4. The source code and binary forms and any derivative works are not *
* stored or executed in systems or devices which are designed or *
* intended to harm, to kill or to forcibly immobilize people. *
* *
* 5. The source code and binary forms and any derivative works are not *
* stored or executed in systems or devices which are intended to *
* monitor, to track, to change or to control the behavior, the *
* constitution, the location or the communication of any people or *
* their property without the explicit and prior agreement of those *
* people except those devices and systems are solely designed for *
* saving or protecting peoples life or health. *
* *
* 6. The source code and binary forms and any derivative works are not *
* stored or executed in any systems or devices that are intended *
* for the production of any of the systems or devices that *
* have been stated before except the ones for saving or protecting *
* peoples life or health only. *
* *
* The term 'systems' in all clauses shall include all types and combinations *
* of physical, virtualized or simulated hardware and software and any kind *
* of data storage. *
* *
* The term 'devices' shall include any kind of local or non-local control *
* system of the stated devices as part of that device als well. Any assembly *
* of more than one device is one and the same device regarding this license. *
* *
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS "AS IS" *
* AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE *
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE *
* ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR CONTRIBUTORS BE *
* LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR *
* CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF *
* SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS *
* INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN *
* CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) *
* ARISING IN ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE *
* POSSIBILITY OF SUCH DAMAGE. *
* *
* --------------------------------------------------------------------------- *
* *
* What are the advantages of using this implementation instead of using the *
* build-in functions of your compiler? *
* *
* Security: You do not share your possibly private internal string data *
* with 3rd party compiler libraries which are easy to modify. *
* Portability: The implementation behaves the same on every plattform as *
* long as the data types have the same sizes. You do not have *
* to worry about different format strings on every platform. *
* Features: This implementation is pretty fast and provides some special *
* features as the common length modiers for %n, output of *
* integers in binary format and a fully featured floating point *
* output in tridynal, quadral, hexal, heptal, octal and nonal *
* system. For selecting a special numeric base just add a *
* r2 .. r9 prefix to common integer or floation point format *
* specifiers. It's possible to speficy the numeric base using r* *
* prefix and and additional integer argument that contains the *
* base, e.g for printing a long int using numeric base 4 *
* ssprintf(buffer, "%r*ld", (int) 4, LONG_MIN); *
* callback_printf supports the Windows I64 and I32 integer *
* length modifiers as well as the additional modifiers l1, l2, *
* l4 and l8 for 8, 16, 32 and 64 bit wide integer arguments. *
* Wide characters and wide character string are always converted *
* to UTF-8 output. You can use l1, l2 and l4 length modiefiers *
* for converting string of 8, 16 or 32 bit wide character size *
* on every platform. *
* And last but not least is it pretty ease to create your own *
* fully featured and fast sprintf compatible string generator *
* function by using callback_printf whithout worrying about *
* portability. This software is more than a toy. *
* Limits: The function rebase uses some multiplications for calculating *
* the decimal mantissa and is able to convert values for more *
* base systems than just the decimal system. The conversion is *
* very fast but the math of the convertion costs a little bit of *
* precision because of some additionally required floating point *
* operations. This should be rarely a big problem of course. *
* *
* The output of very big values with %f happens in %e format. *
* The output length of the mantissa of floating points is *
* limited in size. *
* callback_printf does not care about any differences of the *
* users locale. *
* *
\*****************************************************************************/
#undef _CRT_ERRNO_DEFINED
#include <errno.h>
#include <limits.h>
#include <float.h> /* LDBL_MAX */
#include <callback_printf.h>
#ifdef _WIN32
#pragma warning(disable : 4100 4127 4706 4710)
#endif
/* ========================================================================= *\
\* ========================================================================= */
const char * LowerDigit = "0123456789abcdefghijklmnopqrstuvwxyz"; /* array for encoding numbers */
const char * UpperDigit = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ"; /* array for encoding numbers */
/* Array of character type flags:
0x01 : Characters: A-Z a-z _
0x02 : Digits: 0 - 9
0x04 : blanks and control characters
0x08 : operators: \n \r ! " # $ % & ( ) * + , - . / : ; < = > ? [ \ ] ^ @ { | } ~
0x10 : printf format termination characters bBdiouxXaAeEfFgGsScCpn% '\0'
0x20 : printf format flag characters -+# 0
0x40 : printf integer format characters bBdiouxX */
const uint8_t CharType[256] = { 0x10,0x04,0x04,0x04, 0x04,0x04,0x04,0x04, 0x04,0x04,0x08,0x04, 0x04,0x08,0x04,0x04,
0x04,0x04,0x04,0x04, 0x04,0x04,0x04,0x04, 0x04,0x04,0x04,0x04, 0x04,0x04,0x04,0x04,
/* ! " # $ % & ' ( ) * + , - . / */
0x24,0x08,0x08,0x28, 0x08,0x18,0x08,0x08, 0x08,0x08,0x08,0x28, 0x08,0x28,0x08,0x08,
/* 0 1 2 3 4 5 6 7 8 9 : ; < = > ? */
0x22,0x02,0x02,0x02, 0x02,0x02,0x02,0x02, 0x02,0x02,0x08,0x08, 0x08,0x08,0x08,0x08,
/* @ A B C D E F G H I J K L M N O */
0x08,0x11,0x51,0x11, 0x01,0x91,0x91,0x91, 0x01,0x01,0x01,0x01, 0x01,0x01,0x01,0x01,
/* P Q R S T U V W X Y Z [ \ ] ^ _ */
0x01,0x01,0x01,0x11, 0x01,0x01,0x01,0x01, 0x51,0x01,0x01,0x08, 0x08,0x08,0x08,0x01,
/* ` a b c d e f g h i j k l m n o */
0x08,0x11,0x51,0x11, 0x51,0x91,0x91,0x91, 0x01,0x51,0x01,0x01, 0x01,0x01,0x11,0x51,
/* p q r s t u v w x y z { | } ~ */
0x11,0x01,0x01,0x11, 0x01,0x51,0x01,0x01, 0x51,0x01,0x01,0x08, 0x08,0x08,0x08,0x04,
0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00,
0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x00, 0x00,0x00,0x00,0x04};
/* ========================================================================= *\
UTF8 encoding and decoding
\* ========================================================================= */
/* ------------------------------------------------------------------------- *\
iUtf8Decode decodes an UTF8 data buffer. It stops at end of decodable
source or if end of destination buffer gets reached. Source and
destination buffer must not overlap. Source and destination pointer get
moved behind last decoded character of converted input and output.
The function returns -1 in case of wrong arguments and -2 in case of
(currently ignored!) errors within source data. In success case 0 gets
returned.
If pDst is NULL then no output happens and pDstSize will be set to the
required size of the destination buffer to hold the whole converted input
and the source size and source pointer are unchanged.
\* ------------------------------------------------------------------------- */
int iUtf8Decode (void ** pDst, /* destination buffer */
size_t * pDstSize, /* remaining destination buffer size */
void ** pSrc, /* source buffer */
size_t * pSrcSize, /* remaining source data size */
size_t DstCharWidth) /* width of destination characters */
{
static uint8_t Utf8length[]={ 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1, 1,1,1,1,1,1,1,1,
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, /* 80 - 9f */
0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, 0,0,0,0,0,0,0,0, /* a0 - bf */
2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, 2,2,2,2,2,2,2,2, /* c0 - df */
3,3,3,3,3,3,3,3, 3,3,3,3,3,3,3,3, 4,4,4,4,4,4,4,4, 5,5,5,5,6,6,7,2 }; /* e0 - ff */
int err = 0; /* return value */
size_t dz = 0;
size_t sz = 0;
size_t val = 0x87654321;
size_t max_val = 0;
unsigned char * pv = (unsigned char *) &val;
unsigned char * ps;
size_t l;
int little_endian = 0x21 == *pv; /* nonzero in case of little endian */
if((pDst && !*pDst) || !pDstSize || (pDst && !*pDstSize) ||
!pSrc || !*pSrc || !pSrcSize || !*pSrcSize ||
!DstCharWidth || (DstCharWidth > sizeof(val)))
{
err = -1;
goto Exit;
}
if(sizeof(val) != DstCharWidth)
max_val = ~max_val >> ((sizeof(val) - DstCharWidth) << 3);
else
max_val = ~max_val;
if(!little_endian)
pv += sizeof(val);
sz = *pSrcSize;
ps = (unsigned char *) *pSrc;
if(!pDst)
{
while(sz)
{
l = Utf8length[*ps];
if(1 == l)
{
val = *ps;
ps++;
sz--;
}
else
{
if(!l)
{/* Invalid character, skip this possibly a broken sequence. */
sz--;
ps++;
err = -2;
continue;
}
if(sz < l)
break; /* buffer size smaller than character size */
if(0xff == *ps)
{/* For now we'll ignore 0xff and any immediately following character */
ps += 2;
sz -= 2;
continue;
}
val = *ps++ & ~(0xff << (7-l));
sz--;
while(--l)
{
if(Utf8length[*ps])
break; /* ignore invalid encoded characters */
val <<= 6;
val += *ps++ & 0x3f;
sz--;
}
if(l)
{ /* Let's skip invalid encoded characters and set error flag */
err = -2;
continue;
}
}
if(val > max_val)
{/* The decoded value exceeds character width. Let's replace it by the max. possible value. */
err = -2;
val = max_val;
}
dz += DstCharWidth;
}
}
else
{
unsigned char * pd = (unsigned char *) *pDst;
dz = *pDstSize;
while(sz && (dz >= DstCharWidth))
{
l = Utf8length[*ps];
if(1 == l)
{
val = *ps;
ps++;
sz--;
}
else
{
if(!l)
{/* Invalid character, skip this possibly a broken sequence. */
sz--;
ps++;
err = -2;
continue;
}
if(sz < l)
break; /* buffer size smaller than character size */
if(0xff == *ps)
{/* For now we'll ignore 0xff and any immediately following character */
ps += 2;
sz -= 2;
continue;
}
val = *ps++ & ~(0xff << (7-l));
sz--;
while(--l)
{
if(Utf8length[*ps])
break; /* ignore invalid encoded characters */
val <<= 6;
val += *ps++ & 0x3f;
sz--;
}
if(l)
{ /* Let's skip invalid encoded characters and set error flag */
err = -2;
continue;
}
}
if(val > max_val)
{/* The decoded value exceeds character width. Let's replace it by the max. possible value. */
err = -2;
val = max_val;
}
if(!pDst)
{
dz += DstCharWidth;
}
else
{
if(little_endian)
{
l = 0;
while(l < DstCharWidth)
{
pd[l] = pv[l];
l++;
}
}
else
{
l = DstCharWidth;
while(l)
{
*(pd + DstCharWidth - l) = *(pv - l);
l--;
}
}
pd += DstCharWidth;
dz -= DstCharWidth;
}
}
*pDst = pd;
*pSrc = ps;
*pSrcSize = sz;
}
*pDstSize = dz;
Exit:;
return (err);
}/* int iUtf8Decode (...) */
/* ------------------------------------------------------------------------- *\
iUtf8Encode encodes unicode characters in UTF8 format. It stops at end of
decodable source or if end of destination buffer gets reached. Source and
destination buffer must not overlap. Source and destination pointer get
moved behind last decoded character of converted input and output.
The function returns -1 in case of wrong arguments and -2 in case of
(currently without any output ignored!) errors within source data
(e.g. if a source value exceeds 32 bit). In success case 0 gets returned.
If pDst is NULL then no output happens and pDstSize will be set to the
required size of the destination buffer to hold the whole converted input
and the source size and source pointer are unchanged.
\* ------------------------------------------------------------------------- */
int iUtf8Encode (void ** pDst, /* destination buffer */
size_t * pDstSize, /* remaining destination buffer size */
void ** pSrc, /* source buffer */
size_t * pSrcSize, /* remaining source data size */
size_t SrcCharWidth) /* width of destination characters */
{
int err = 0; /* return value */
size_t dz = 0;
size_t sz = 0;
size_t val = 0x87654321;
unsigned char * pv = (unsigned char *) &val;
unsigned char * ps;
size_t cw = 0;
int little_endian = 0x21 == *pv;
if((pDst && !*pDst) || !pDstSize || (pDst && !*pDstSize) ||
!pSrc || !*pSrc || !pSrcSize || !*pSrcSize ||
(SrcCharWidth > sizeof(val)))
{
err = -1;
goto Exit;
}
if(!little_endian)
pv += sizeof(val);
sz = *pSrcSize;
ps = (unsigned char *) *pSrc;
if (!pDst)
{
while(sz >= SrcCharWidth)
{
val = 0;
if(little_endian)
{
cw = 0;
while(cw < SrcCharWidth)
{
pv[cw] = ps[cw];
cw++;
}
}
else
{
cw = SrcCharWidth;
while(cw)
{
*(pv-cw) = *(ps + SrcCharWidth - cw);
cw--;
}
}
if(val <= 0x7f)
dz++;
else if(val <= 0x7ff)
dz += 2;
else if(val <= 0xffff)
dz += 3;
else if(val <= 0x1fffff)
dz += 4;
else if(val <= 0x3ffffff)
dz += 5;
else if(val <= 0x7fffffff)
dz += 6;
else if(val <= 0xffffffff)
dz += 7;
else
{ /* We don't handle values that exceed 32 bits */
err = -2;
}
ps += SrcCharWidth;
sz -= SrcCharWidth;
}
}
else
{
unsigned char * pd = (unsigned char *) *pDst;
dz = *pDstSize;
while(sz >= SrcCharWidth)
{
val = 0;
if(little_endian)
{
cw = 0;
while(cw < SrcCharWidth)
{
pv[cw] = ps[cw];
cw++;
}
}
else
{
cw = SrcCharWidth;
while(cw)
{
*(pv-cw) = *(ps + SrcCharWidth - cw);
cw--;
}
}
if(val <= 0x7f)
{
if(dz < 1)
break;
dz--;
*pd++ = (unsigned char) val;
}
else if(val <= 0x7ff)
{
if (dz < 2)
break;
dz -= 2;
pd[0] = (unsigned char) (((val >> 6) & 0x1f) + 0xc0);
pd[1] = (unsigned char) ((val & 0x3f) + 0x80);
pd += 2;
}
else if(val <= 0xffff)
{
if (dz < 3)
break;
dz -= 3;
pd[0] = (unsigned char) (((val >> 12) & 0xf) + 0xe0);
pd[1] = (unsigned char) (((val >> 6) & 0x3f) + 0x80);
pd[2] = (unsigned char) ((val & 0x3f) + 0x80);
pd += 3;
}
else if(val <= 0x1fffff)
{
if (dz < 4)
break;
dz -= 4;
pd[0] = (unsigned char) (((val >> 18) & 0x7) + 0xf0);
pd[1] = (unsigned char) (((val >> 12) & 0x3f) + 0x80);
pd[2] = (unsigned char) (((val >> 6) & 0x3f) + 0x80);
pd[3] = (unsigned char) ((val & 0x3f) + 0x80);
pd += 4;
}
else if(val <= 0x3ffffff)
{
if (dz < 5)
break;
dz -= 5;
pd[0] = (unsigned char) (((val >> 24) & 0x3) + 0xf8);
pd[1] = (unsigned char) (((val >> 18) & 0x3f) + 0x80);
pd[2] = (unsigned char) (((val >> 12) & 0x3f) + 0x80);
pd[3] = (unsigned char) (((val >> 6) & 0x3f) + 0x80);
pd[4] = (unsigned char) ((val & 0x3f) + 0x80);
pd += 5;
}
else if(val <= 0x7fffffff)
{
if(dz < 6)
break;
dz -= 6;
pd[0] = (unsigned char) (((val >> 30) & 0x1) + 0xfc);
pd[1] = (unsigned char) (((val >> 24) & 0x3f) + 0x80);
pd[2] = (unsigned char) (((val >> 18) & 0x3f) + 0x80);
pd[3] = (unsigned char) (((val >> 12) & 0x3f) + 0x80);
pd[4] = (unsigned char) (((val >> 6) & 0x3f) + 0x80);
pd[5] = (unsigned char) ((val & 0x3f) + 0x80);
pd += 6;
}
else if(val <= 0xffffffff)
{
if(dz < 7)
break;
dz -= 7;
pd[0] = 0xfe;
pd[1] = (unsigned char) (((val >> 30) & 0x3) + 0x80);
pd[2] = (unsigned char) (((val >> 24) & 0x3f) + 0x80);
pd[3] = (unsigned char) (((val >> 18) & 0x3f) + 0x80);
pd[4] = (unsigned char) (((val >> 12) & 0x3f) + 0x80);
pd[5] = (unsigned char) (((val >> 6) & 0x3f) + 0x80);
pd[6] = (unsigned char) ((val & 0x3f) + 0x80);
pd += 7;
}
else
{ /* We don't handle values that exceed 32 bits */
err = -2;
}
ps += SrcCharWidth;
sz -= SrcCharWidth;
}
*pDst = pd; /* store the end position of the scan */
*pSrc = ps;
*pSrcSize = sz;
}
*pDstSize = dz;
Exit:;
return (err);
} /* int iUtf8Encode (...) */
/* ========================================================================= *\
callback_printf related stuff ...
\* ========================================================================= */
static const char * pzeros = "00000000000000000000000000000000"; /* blanks to copy */
static const char * pblanks = " "; /* blanks to copy */
static const char * lower_digits = "0123456789abcdefghijklmnopqrstuvwxyz";
static const char * upper_digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
static size_t cbk_print_number(void * pUserData, /* user specific context for the callback */
PRINTF_CALLBACK * pCB, /* data write callback */
const char * pvalue, /* number string to to write out */
size_t length, /* length of number string */
const char * padding, /* pointer to padding bytes to fill in after prefix before the numeric value */
char sign_char, /* optional sign character to fill in */
uint8_t prefix_base, /* if nonzero base for C style prefixing of octals and hexadecimals if prefixeng is required required */
uint8_t uppercase, /* whether to use uppercase letters for prefix */
uint8_t left_justified, /* left justified value witin the output data field */
size_t minwidth, /* minimum width of value to print */
size_t fieldwidth) /* minimum field width */
{
size_t zRet = 0;
char prefix[8];
char * pf = prefix;
size_t prelen; /* length of sign and prefix */
/* ------------------------------------------------------------------------- *\
prepare prefix value
\* ------------------------------------------------------------------------- */
if (sign_char)
*pf++ = sign_char;
if(prefix_base)
{
if(prefix_base == 16)
{
*pf++ = '0';
*pf++ = uppercase ? 'X' : 'x';
}
else if (prefix_base == 8)
{
if(length >= minwidth)
*pf++ = '0';
}
else if (prefix_base == 2)
{
*pf++ = '0';
*pf++ = uppercase ? 'B' : 'b';
}
}
prelen = pf - prefix;
/* ------------------------------------------------------------------------- *\
generate the output
\* ------------------------------------------------------------------------- */
if(minwidth > length)
minwidth -= length;
else
minwidth = 0;
if(fieldwidth <= (minwidth + length + prelen))
{
zRet = minwidth + length + prelen;
if(prelen)
pCB(pUserData, prefix, prelen);
if(minwidth)
{
while (minwidth > 32) /* adjust the byte length 'x' to be swapped within the output string */
{
pCB(pUserData, pzeros, 32);
minwidth -= 32;
}
pCB(pUserData, pzeros, minwidth);
}
if(length)
pCB(pUserData, pvalue, length); /* output of value at begin */
}
else
{ /* we have to add filler characters for ensuring the minimum field width */
zRet = fieldwidth;
fieldwidth -= length + minwidth + prelen; /* calculate number of required fill characters */
if(prelen && (padding == pzeros))
{
pCB(pUserData, prefix, prelen);
prelen = 0;
}
if (!left_justified)
{ /* fill in leading blanks */
while (fieldwidth > 32)
{
pCB(pUserData, padding, 32);
fieldwidth -= 32;
}
pCB(pUserData, padding, fieldwidth);
}
if(prelen)
pCB(pUserData, prefix, prelen);
if(minwidth)
{ /* fill in leading zeros */
while (minwidth > 32)
{
pCB(pUserData, pzeros, 32);
minwidth -= 32;
}
pCB(pUserData, pzeros, minwidth);
}
if(length)
pCB(pUserData, pvalue, length); /* output of value at begin */
if (left_justified)
{ /* fill in trailing blanks */
while (fieldwidth > 32)
{
pCB(pUserData, pblanks, 32);
fieldwidth -= 32;
}
pCB(pUserData, pblanks, fieldwidth);
}
}
return (zRet);
} /* size_t cbk_print_number(...) */
/* Array of the numeric bases that are related to the printf integer format characters */
static const uint8_t PrintfIntBase[256] = {10,16, 2, 3, 4, 5, 6, 7, 8, 9,10,11, 12,13,14,15, 16,17,18,19, 20,21,22,23, 24,25,26,27, 28,29,30,31,
/* ! " # $ % & ' ( ) * + , - . / 0 1 2 3 4 5 6 7 8 9 : ; < = > ? */
32,33,34,35, 36, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 10,16, 2, 3, 4, 5, 6, 7, 8, 9, 0, 0, 0, 0, 0, 0,
/* @ A B C D E F G H I J K L M N O P Q R S T U V W X Y Z [ \ ] ^ _ */
0, 0, 2, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0,
/* ` a b c d e f g h i j k l m n o p q r s t u v w x y z { | } ~ */
0, 0, 2, 0, 10, 0, 0, 0, 0,10, 0, 0, 0, 0, 0, 8, 16, 0, 0, 0, 0,10, 0, 0, 16, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0,
0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0, 0 };
/* d00 contains the decimal numbers from 00 to 99 */
static const char * d00 = "00010203040506070809" "10111213141516171819" "20212223242526272829" "30313233343536373839" "40414243444546474849"
"50515253545556575859" "60616263646566676869" "70717273747576777879" "80818283848586878889" "90919293949596979899";
/* ------------------------------------------------------------------------- *\
cbk_print_u64 prints an uint64_t using a printf callback function
and returns the written string data length.
\* ------------------------------------------------------------------------- */
static size_t cbk_print_u64(void * pUserData, /* user specific context for the callback */
PRINTF_CALLBACK * pCB, /* data write callback */
uint64_t value, /* value to write to the string */
char format, /* format character in the format string */
char sign_char, /* expected sign character */
uint8_t prefixing, /* C style prefixing of octals and hexadecimals required */
uint8_t left_justified, /* left justified value witin the output data field */
uint8_t blank_padding, /* whether to pad insuffizient left fieldwidth with blanks or zeros */
size_t precision, /* specified precision or (~(size_t) 0) if unspecified */
size_t fieldwidth) /* minimum field width */
{
size_t zRet = 0;
const char * padding = (blank_padding || (precision != ~(size_t) 0)) ? pblanks : pzeros; /* padding characters in front of the output value */
const char * digit = (format & 0x20) ? lower_digits : upper_digits; /* digits to use */
uint8_t base = PrintfIntBase[(unsigned char) format]; /* numeric base system for the output data */
size_t minwidth = (precision == ~(size_t) 0) ? 1 : precision; /* minimum width of value to print */
char buf[80]; /* buffer for temporary output of value */
char * pe = buf + sizeof(buf);
char * ps = pe;
size_t length = 0;
uint64_t x = value;
if(base < 2)
goto Exit;
if (base == 10)
{
const char * pd;
while (x >= 100)
{
uint64_t tmp = x;
x = tmp / 100;
pd = d00 + ((tmp - x * 100) * 2);
ps -= 2;
ps[0] = pd[0];
ps[1] = pd[1];
}
if(x >= 10)
{
pd = d00 + (x * 2);
ps -= 2;
ps[0] = pd[0];
ps[1] = pd[1];
}
else
*--ps = digit[x];
}
else if (base == 16)
{
if(!x)
prefixing = 0; /* no prefixing of 0x according to the C standard */
while (x >= 16)
{
*--ps = digit[x & 0xf];
x >>= 4;
}
*--ps = digit[x];
}
else if (base == 8)
{
if(!x)
prefixing = 0; /* because of 0 no prefixing required */
while (x >= 8)
{
*--ps = digit[x & 0x7];
x >>= 3;
}
*--ps = digit[x];
}
else if (base == 2)
{
if(!x)
prefixing = 0; /* no prefixing of B according to the C standard */
while (x >= 2)
{
*--ps = digit[x & 0x1];
x >>= 1;
}
*--ps = digit[x];
}
else
{
while (x >= base)
{
uint64_t tmp = x;
x /= base;
*--ps = digit[tmp - (x * base)];
}
*--ps = digit[x];
}
length = (size_t) (pe - ps);
if(!precision && !value)
length = 0; /* strange thing but required by C and Posix standards :o( */
zRet = cbk_print_number(pUserData, pCB, ps, length, padding, sign_char, prefixing ? base : 0, digit == upper_digits, left_justified, minwidth, fieldwidth);
Exit:;
return (zRet);
} /* size_t cbk_print_u64(...) */
/* ------------------------------------------------------------------------- *\
cbk_print_u32 prints an uint32_t using a printf callback function
and returns the written string data length.
\* ------------------------------------------------------------------------- */
static size_t cbk_print_u32(void * pUserData, /* user specific context for the callback */
PRINTF_CALLBACK * pCB, /* data write callback */
uint32_t value, /* value to write to the string */
char format, /* format character in the format string */
char sign_char, /* expected sign character */
uint8_t prefixing, /* C style prefixing of octals and hexadecimals required */
uint8_t left_justified, /* left justified value witin the output data field */
uint8_t blank_padding, /* whether to pad insuffizient left fieldwidth with blanks or zeros */
size_t precision, /* specified precision or (~(size_t) 0) if unspecified */
size_t fieldwidth) /* minimum field width */
{
size_t zRet = 0;
const char * padding = (blank_padding || (precision != ~(size_t) 0)) ? pblanks : pzeros; /* padding characters in front of the output value */
const char * digit = (format & 0x20) ? lower_digits : upper_digits; /* digits to use */
uint8_t base = PrintfIntBase[(unsigned char) format]; /* numeric base system of for the output data */
size_t minwidth = (precision == ~(size_t) 0) ? 1 : precision; /* minimum width of value to print */
char buf[80]; /* buffer for temporary output of value */
char * pe = buf + sizeof(buf);
char * ps = pe;
size_t length = 0;
uint32_t x = value;
if(base < 2)
goto Exit;
if (base == 10)
{
const char * pd;
while (x >= 100)
{
uint32_t tmp = x;
x = tmp / 100;
pd = d00 + ((tmp - x * 100) * 2);
ps -= 2;
ps[0] = pd[0];
ps[1] = pd[1];
}
if(x >= 10)
{
pd = d00 + (x * 2);
ps -= 2;
ps[0] = pd[0];
ps[1] = pd[1];
}
else
*--ps = digit[x];
}
else if (base == 16)
{
if(!x)
prefixing = 0; /* no prefixing of 0x according to the C standard */
while (x >= 16)
{
*--ps = digit[x & 0xf];
x >>= 4;
}
*--ps = digit[x];
}
else if (base == 8)
{
if(!x)
prefixing = 0; /* because of 0 no prefixing required */
while (x >= 8)
{
*--ps = digit[x & 0x7];
x >>= 3;
}
*--ps = digit[x];
}
else if (base == 2)
{
if(!x)
prefixing = 0; /* no prefixing of B according to the C standard */
while (x >= 2)
{
*--ps = digit[x & 0x1];
x >>= 1;
}
*--ps = digit[x];
}
else
{
while (x >= base)
{
uint32_t tmp = x;
x /= base;
*--ps = digit[tmp - (x * base)];
}
*--ps = digit[x];
}