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#include "dietfeatures.h"
#include <stdarg.h>
#include <sys/types.h>
#include <ctype.h>
#include <stdlib.h>
#include <string.h>
#include <limits.h>
#include "dietstdio.h"
#include "dietwarning.h"
#define A_GETC(fn) (++consumed,(fn)->getch((fn)->data))
#define A_PUTC(c,fn) (--consumed,(fn)->putch((c),(fn)->data))
int __v_scanf(struct arg_scanf* fn, const unsigned char *format, va_list arg_ptr)
{
unsigned int ch; /* format act. char */
int n=0;
/* arg_ptr tmps */
#ifdef WANT_FLOATING_POINT_IN_SCANF
double *pd;
float *pf;
#endif
#ifdef WANT_LONGLONG_SCANF
long long *pll;
#endif
long *pl;
short *ph;
int *pi;
char *s;
unsigned int consumed=0;
/* get one char */
int tpch= A_GETC(fn);
//while ((tpch!=-1)&&(*format))
while (*format)
{
// const unsigned char *prev_fmt=format;
ch=*format++;
switch (ch) {
/* end of format string ?!? */
case 0: return 0;
/* skip spaces ... */
case ' ':
case '\f':
case '\t':
case '\v':
case '\n':
case '\r':
while((*format)&&(isspace(*format))) ++format;
while(isspace(tpch)) tpch=A_GETC(fn);
break;
/* format string ... */
case '%':
{
unsigned int _div=0;
int width=-1;
char flag_width=0;
char flag_discard=0;
char flag_half=0;
char flag_long=0;
char flag_longlong=0;
in_scan:
ch=*format++;
if(ch!='n' && tpch==-1) goto err_out;
switch (ch) {
/* end of format string ?!? */
case 0: return 0;
/* check for % */
case '%':
if ((unsigned char)tpch != ch) goto err_out;
tpch=A_GETC(fn);
break;
/* FLAGS */
case '*':
flag_discard=1;
goto in_scan;
case 'h':
flag_half=1;
goto in_scan;
case 'l':
if (flag_long) flag_longlong=1;
flag_long=1;
goto in_scan;
case 'q':
case 'L':
flag_longlong=1;
goto in_scan;
/* WIDTH */
case '0':
case '1':
case '2':
case '3':
case '4':
case '5':
case '6':
case '7':
case '8':
case '9':
width=strtol(format-1,&s,10);
format=s;
flag_width=1;
goto in_scan;
/* scan for integer / strtol reimplementation ... */
case 'p':
case 'X':
case 'x':
_div+=6;
case 'd':
_div+=2;
case 'o':
_div+=8;
case 'u':
case 'i':
{
#ifdef WANT_LONGLONG_SCANF
unsigned long long v=0;
#else
unsigned long v=0;
#endif
unsigned int consumedsofar=consumed;
int neg=0;
while(isspace(tpch)) tpch=A_GETC(fn);
if (tpch=='-') {
tpch=A_GETC(fn);
neg=1;
}
if (tpch=='+') tpch=A_GETC(fn);
if (!flag_width) {
if ((_div==16) && (tpch=='0')) goto scan_hex;
if (!_div) {
_div=10;
if (tpch=='0') {
_div=8;
scan_hex:
tpch=A_GETC(fn);
if ((tpch|32)=='x') {
tpch=A_GETC(fn);
_div=16;
}
}
}
}
while ((width)&&(tpch!=-1)) {
register unsigned long c=tpch&0xff;
#ifdef WANT_LONGLONG_SCANF
register unsigned long long d=c|0x20;
#else
register unsigned long d=c|0x20;
#endif
c=(d>='a'?d-'a'+10:c<='9'?c-'0':0xff);
if (c>=_div) break;
d=v*_div;
#ifdef WANT_LONGLONG_SCANF
v=(d<v)?ULLONG_MAX:d+c;
#else
v=(d<v)?ULONG_MAX:d+c;
#endif
--width;
tpch=A_GETC(fn);
}
if ((ch|0x20)<'p') {
#ifdef WANT_LONGLONG_SCANF
register long long l=v;
if (v>=-((unsigned long long)LLONG_MIN)) {
l=(neg)?LLONG_MIN:LLONG_MAX;
}
else {
if (neg) v*=-1;
}
#else
register long l=v;
if (v>=-((unsigned long)LONG_MIN)) {
l=(neg)?LONG_MIN:LONG_MAX;
}
else {
if (neg) v*=-1;
}
#endif
}
if (!flag_discard) {
#ifdef WANT_LONGLONG_SCANF
if (flag_longlong) {
pll=(long long *)va_arg(arg_ptr,long long*);
*pll=v;
} else
#endif
if (flag_long) {
pl=(long *)va_arg(arg_ptr,long*);
*pl=v;
} else if (flag_half) {
ph=(short*)va_arg(arg_ptr,short*);
*ph=v;
} else {
pi=(int *)va_arg(arg_ptr,int*);
*pi=v;
}
if(consumedsofar<consumed)
++n;
}
}
break;
#ifdef WANT_FLOATING_POINT_IN_SCANF
/* floating point numbers */
case 'e':
case 'E':
case 'f':
case 'g':
{
double d=0.0;
int neg=0;
while(isspace(tpch)) tpch=A_GETC(fn);
if (tpch=='-') {
tpch=A_GETC(fn);
neg=1;
}
if (tpch=='+') tpch=A_GETC(fn);
while (isdigit(tpch)) {
d=d*10+(tpch-'0');
tpch=A_GETC(fn);
}
if (tpch=='.') {
double factor=.1;
tpch=A_GETC(fn);
while (isdigit(tpch)) {
d=d+(factor*(tpch-'0'));
factor/=10;
tpch=A_GETC(fn);
}
}
if ((tpch|0x20)=='e') {
int exp=0, prec=tpch;
double factor=10;
tpch=A_GETC(fn);
if (tpch=='-') {
factor=0.1;
tpch=A_GETC(fn);
} else if (tpch=='+') {
tpch=A_GETC(fn);
} else {
d=0;
if (tpch!=-1) A_PUTC(tpch,fn);
tpch=prec;
goto exp_out;
}
while (isdigit(tpch)) {
exp=exp*10+(tpch-'0');
tpch=A_GETC(fn);
}
while (exp) { /* as in strtod: XXX: this introduces rounding errors */
d*=factor; --exp;
}
}
exp_out:
if (!flag_discard) {
if (flag_long) {
pd=(double *)va_arg(arg_ptr,double*);
*pd=d;
} else {
pf=(float *)va_arg(arg_ptr,float*);
*pf=d;
}
}
++n;
}
break;
#endif
/* char-sequences */
case 'c':
if (!flag_discard) {
s=(char *)va_arg(arg_ptr,char*);
++n;
}
if (!flag_width) width=1;
while (width && (tpch!=-1)) {
if (!flag_discard) *(s++)=tpch;
--width;
tpch=A_GETC(fn);
}
break;
/* c-string */
case 's':
if (!flag_discard) s=(char *)va_arg(arg_ptr,char*);
while(isspace(tpch)) tpch=A_GETC(fn);
while (width && (tpch!=-1) && (!isspace(tpch))) {
if (!flag_discard) *s=tpch;
if (tpch) ++s; else break;
--width;
tpch=A_GETC(fn);
}
if (!flag_discard) { *s=0; n++; }
break;
/* consumed-count */
case 'n':
if (!flag_discard) {
s=(char *)va_arg(arg_ptr,char*);
// ++n; /* in accordance to ANSI C we don't count this conversion */
}
if (!flag_discard) *(s++)=consumed-1;
break;
#ifdef WANT_CHARACTER_CLASSES_IN_SCANF
case '[':
{
char cset[256];
int flag_not=0;
int flag_dash=0;
memset(cset,0,sizeof(cset));
ch=*format++;
/* first char specials */
if (ch=='^') {
flag_not=1;
ch=*format++;
}
if ((ch=='-')||(ch==']')) {
cset[ch]=1;
ch=*format++;
}
/* almost all non special chars */
for (;(*format) && (*format!=']');++format) {
if (flag_dash) {
register unsigned char tmp=*format;
for (;ch<=tmp;++ch) cset[ch]=1;
flag_dash=0;
ch=*format;
}
else if (*format=='-') flag_dash=1;
else {
cset[ch]=1;
ch=*format;
}
}
/* last char specials */
if (flag_dash) cset['-']=1;
else cset[ch]=1;
/* like %c or %s */
if (!flag_discard) {
s=(char *)va_arg(arg_ptr,char*);
++n;
}
while (width && (tpch>=0) && (cset[tpch]^flag_not)) {
if (!flag_discard) *s=tpch;
if (tpch) ++s; else break;
--width;
tpch=A_GETC(fn);
}
if (!flag_discard) *s=0;
++format;
}
break;
#endif
default:
goto err_out;
}
}
break;
/* check if equal format string... */
default:
if ((unsigned char)tpch != ch) goto err_out;
tpch=A_GETC(fn);
break;
}
}
err_out:
if (tpch<0 && n==0) return EOF;
A_PUTC(tpch,fn);
return n;
}
link_warning("__v_scanf","warning: the scanf functions add several kilobytes of bloat.");
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