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/***************************************************************************
* __________ __ ___.
* Open \______ \ ____ ____ | | _\_ |__ _______ ___
* Source | _// _ \_/ ___\| |/ /| __ \ / _ \ \/ /
* Jukebox | | ( <_> ) \___| < | \_\ ( <_> > < <
* Firmware |____|_ /\____/ \___ >__|_ \|___ /\____/__/\_ \
* \/ \/ \/ \/ \/
* $Id$
*
* Copied from firmware/common/sscanf.c
* Original author: Tomasz Malesinski
*
* Copyright (C) 2010 Maurus Cuelenaere
*
* This program is free software; you can redistribute it and/or
* modify it under the terms of the GNU General Public License
* as published by the Free Software Foundation; either version 2
* of the License, or (at your option) any later version.
*
* This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
* KIND, either express or implied.
*
****************************************************************************/
#include "rocklibc.h"
static int parse_dec(int (*peek)(void *userp),
void (*pop)(void *userp),
void *userp,
long *vp)
{
long v = 0;
int n = 0;
int minus = 0;
char ch;
if ((*peek)(userp) == '-')
{
(*pop)(userp);
n++;
minus = 1;
}
ch = (*peek)(userp);
if (!isdigit(ch))
return -1;
do
{
v = v * 10 + ch - '0';
(*pop)(userp);
n++;
ch = (*peek)(userp);
} while (isdigit(ch));
*vp = minus ? -v : v;
return n;
}
static int parse_chars(int (*peek)(void *userp),
void (*pop)(void *userp),
void *userp,
char *vp,
bool fake)
{
int n = 0;
char *pt=vp;
while (!isspace((*peek)(userp)))
{
if(fake==false)
*(pt++) = (*peek)(userp);
n++;
(*pop)(userp);
}
if(fake==false)
(*pt)='\0';
return n;
}
static int parse_hex(int (*peek)(void *userp),
void (*pop)(void *userp),
void *userp,
unsigned long *vp)
{
unsigned long v = 0;
int n = 0;
char ch;
ch = (*peek)(userp);
if (!isxdigit(ch))
return -1;
do
{
if (ch >= 'a')
ch = ch - 'a' + 10;
else if (ch >= 'A')
ch = ch - 'A' + 10;
else
ch = ch - '0';
v = v * 16 + ch;
(*pop)(userp);
n++;
ch = (*peek)(userp);
} while (isxdigit(ch));
*vp = v;
return n;
}
static int skip_spaces(int (*peek)(void *userp),
void (*pop)(void *userp),
void *userp)
{
int n = 0;
while (isspace((*peek)(userp))) {
n++;
(*pop)(userp);
}
return n;
}
static int scan(int (*peek)(void *userp),
void (*pop)(void *userp),
void *userp,
const char *fmt,
va_list ap)
{
char ch;
int n = 0;
int n_chars = 0;
int r;
long lval;
bool skip=false;
unsigned long ulval;
while ((ch = *fmt++) != '\0')
{
bool literal = false;
if (ch == '%')
{
ch = *fmt++;
if(ch== '*') /* We should process this, but not store it in an argument */
{
ch=*fmt++;
skip=true;
}
else
{
skip=false;
}
switch (ch)
{
case 'x':
n_chars += skip_spaces(peek, pop, userp);
if ((r = parse_hex(peek, pop, userp, &ulval)) >= 0)
{
if(skip==false)
{
*(va_arg(ap, unsigned int *)) = ulval;
n++;
}
n_chars += r;
}
else
return n;
break;
case 'd':
n_chars += skip_spaces(peek, pop, userp);
if ((r = parse_dec(peek, pop, userp, &lval)) >= 0)
{
if(skip==false)
{
*(va_arg(ap, int *)) = lval;
n++;
}
n_chars += r;
}
else
return n;
break;
case 'n':
if(skip==false)
{
*(va_arg(ap, int *)) = n_chars;
n++;
}
break;
case 'l':
n_chars += skip_spaces(peek, pop, userp);
ch = *fmt++;
switch (ch)
{
case 'x':
if ((r = parse_hex(peek, pop, userp, &ulval)) >= 0)
{
if(skip==false)
{
*(va_arg(ap, unsigned long *)) = ulval;
n++;
}
n_chars += r;
}
else
return n;
break;
case 'd':
if ((r = parse_dec(peek, pop, userp, &lval)) >= 0)
{
if(skip==false)
{
*(va_arg(ap, long *)) = lval;
n++;
}
n_chars += r;
}
else
return n;
break;
case '\0':
return n;
default:
literal = true;
break;
}
break;
case 's':
n_chars += skip_spaces(peek, pop, userp);
n_chars += parse_chars(peek,pop, userp,skip?0:va_arg(ap, char *), skip );
if(skip==false)
{
n++;
}
break;
case '\0':
return n;
default:
literal = true;
break;
}
} else
literal = true;
if (literal)
{
n_chars += skip_spaces(peek, pop, userp);
if ((*peek)(userp) != ch)
continue;
else
{
(*pop)(userp);
n_chars++;
}
}
}
return n;
}
static int fspeek(void *userp)
{
int fd = *((int*) userp);
char buf = 0;
if(rb->read(fd, &buf, 1) == 1)
rb->lseek(fd, -1, SEEK_CUR);
return buf;
}
static void fspop(void *userp)
{
int fd = *((int*) userp);
rb->lseek(fd, 1, SEEK_CUR);
}
int PREFIX(fscanf)(int fd, const char *fmt, ...)
{
int r;
va_list ap;
va_start(ap, fmt);
r = scan(fspeek, fspop, &fd, fmt, ap);
va_end(ap);
return r;
}
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