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sortix--sortix/libmaxsi/format.cpp

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/******************************************************************************
COPYRIGHT(C) JONAS 'SORTIE' TERMANSEN 2011.
This file is part of LibMaxsi.
LibMaxsi is free software: you can redistribute it and/or modify it under
the terms of the GNU Lesser General Public License as published by the Free
Software Foundation, either version 3 of the License, or (at your option)
any later version.
LibMaxsi is distributed in the hope that it will be useful, but WITHOUT ANY
WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS
FOR A PARTICULAR PURPOSE. See the GNU Lesser General Public License for
more details.
You should have received a copy of the GNU Lesser General Public License
along with LibMaxsi. If not, see <http://www.gnu.org/licenses/>.
format.cpp
Provides printf formatting functions that uses callbacks.
******************************************************************************/
#include "platform.h"
#include "string.h"
#include "format.h"
namespace Maxsi
{
namespace String
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{
int ConvertUInt8(uint8_t Num, char* Dest)
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{
uint8_t Copy = Num;
int Result = 0;
while ( Copy > 9 ) { Copy /= 10; Result++; }
int Offset = Result;
while ( Offset >= 0 )
{
Dest[Offset] = '0' + Num % 10; Num /= 10; Offset--;
}
return Result + 1;
}
int ConvertUInt16(uint16_t Num, char* Dest)
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{
uint16_t Copy = Num;
int Result = 0;
while ( Copy > 9 ) { Copy /= 10; Result++; }
int Offset = Result;
while ( Offset >= 0 )
{
Dest[Offset] = '0' + Num % 10; Num /= 10; Offset--;
}
return Result + 1;
}
int ConvertUInt32(uint32_t Num, char* Dest)
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{
uint32_t Copy = Num;
int Result = 0;
while ( Copy > 9 ) { Copy /= 10; Result++; }
int Offset = Result;
while ( Offset >= 0 )
{
Dest[Offset] = '0' + Num % 10; Num /= 10; Offset--;
}
return Result + 1;
}
int ConvertUInt64(uint64_t Num, char* Dest)
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{
uint64_t Copy = Num;
int Result = 0;
while ( Copy > 9 ) { Copy /= 10; Result++; }
int Offset = Result;
while ( Offset >= 0 )
{
Dest[Offset] = '0' + Num % 10; Num /= 10; Offset--;
}
return Result + 1;
}
// Missing functions here.
int ConvertUInt3216(uint32_t Num, char* Dest)
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{
uint32_t Copy = Num;
int Result = 0;
while ( Copy > 15 ) { Copy /= 16; Result++; }
int Offset = Result;
while ( Offset >= 0 )
{
if ( Num % 16 < 10 )
{
Dest[Offset] = '0' + Num % 16;
}
else
{
Dest[Offset] = 'A' + (Num % 16) - 10;
}
Num /= 16; Offset--;
}
return Result + 1;
}
int ConvertUInt6416(uint64_t Num, char* Dest)
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{
uint64_t Copy = Num;
int Result = 0;
while ( Copy > 15 ) { Copy /= 16; Result++; }
int Offset = Result;
while ( Offset >= 0 )
{
if ( Num % 16 < 10 )
{
Dest[Offset] = '0' + Num % 16;
}
else
{
Dest[Offset] = 'A' + (Num % 16) - 10;
}
Num /= 16; Offset--;
}
return Result + 1;
}
}
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namespace Format
{
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#define READY_SIZE 128
#define READY_FLUSH() \
ready[readylen] = '\0'; \
if ( 0 < readylen && callback && callback(user, ready, readylen) != readylen ) { return SIZE_MAX; } \
written += readylen; readylen = 0;
size_t Virtual(Callback callback, void* user, const char* format, va_list parameters)
{
size_t written = 0;
size_t readylen = 0;
char ready[READY_SIZE + 1];
while ( *format != '\0' )
{
char c = *(format++);
if ( c != '%' )
{
if ( READY_SIZE <= readylen ) { READY_FLUSH(); }
ready[readylen++] = c;
continue;
}
const nat UNSIGNED = 0;
const nat BIT64 = (1<<0);
const nat HEX = (1<<1);
const nat STRING = 4;
const nat CHARACTER = 5;
#ifdef PLATFORM_X64
const nat WORDWIDTH = BIT64;
#else
const nat WORDWIDTH = 0;
#endif
// TODO: Support signed datatypes!
nat type = 0;
bool scanning = true;
while ( scanning )
{
switch( *(format++) )
{
case '3':
case '2':
break;
case '6':
case '4':
type |= BIT64;
break;
case 'p':
type = WORDWIDTH | HEX;
scanning = false;
break;
case 'z':
type |= WORDWIDTH;
break;
case 'u':
type |= UNSIGNED;
scanning = false;
break;
case 'x':
type |= HEX;
scanning = false;
break;
case 's':
type = STRING;
scanning = false;
break;
case 'c':
type = CHARACTER;
scanning = false;
break;
default:
return SIZE_MAX;
}
}
switch ( type )
{
case UNSIGNED:
{
if ( READY_SIZE - readylen < 10 ) { READY_FLUSH(); }
uint32_t num = va_arg(parameters, uint32_t);
readylen += String::ConvertUInt32(num, ready + readylen);
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break;
}
case UNSIGNED | BIT64:
{
if ( READY_SIZE - readylen < 20 ) { READY_FLUSH(); }
uint64_t num = va_arg(parameters, uint64_t);
readylen += String::ConvertUInt64(num, ready + readylen);
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break;
}
case UNSIGNED | HEX:
{
if ( READY_SIZE - readylen < 8 ) { READY_FLUSH(); }
uint32_t num = va_arg(parameters, uint32_t);
readylen += String::ConvertUInt3216(num, ready + readylen);
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break;
}
case UNSIGNED | BIT64 | HEX:
{
if ( READY_SIZE - readylen < 16 ) { READY_FLUSH(); }
uint64_t num = va_arg(parameters, uint64_t);
readylen += String::ConvertUInt6416(num, ready + readylen);
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break;
}
case STRING:
{
READY_FLUSH();
const char* str = va_arg(parameters, const char*);
size_t len = String::Length(str);
if ( callback && callback(user, str, len) != len ) { return SIZE_MAX; }
written += len;
break;
}
case CHARACTER:
{
int c = va_arg(parameters, int);
if ( READY_SIZE <= readylen ) { READY_FLUSH(); }
ready[readylen++] = c;
break;
}
}
}
READY_FLUSH();
return written;
}
}
}