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/*
* This file is subject to the terms of the GFX License. If a copy of
* the license was not distributed with this file, you can obtain one at:
*
* http://ugfx.org/license.html
*/
/********************************************************
* Printg Routines
********************************************************/
#include "gfx.h"
#if GFX_USE_GFILE && GFILE_NEED_PRINTG
#include <stdarg.h>
#define MAX_FILLER 11
#define FLOAT_PRECISION 100000
int fnprintg(GFILE *f, int maxlen, const char *fmt, ...) {
int res;
va_list ap;
va_start(ap, fmt);
res = vfnprintg(f, maxlen, fmt, ap);
va_end(ap);
return res;
}
static char *ltoa_wd(char *p, long num, unsigned radix, long divisor) {
int i;
char * q;
if (!divisor) divisor = num;
q = p + MAX_FILLER;
do {
i = (int)(num % radix);
i += '0';
if (i > '9')
i += 'A' - '0' - 10;
*--q = i;
num /= radix;
} while ((divisor /= radix) != 0);
i = (int)(p + MAX_FILLER - q);
do {
*p++ = *q++;
} while (--i);
return p;
}
int vfnprintg(GFILE *f, int maxlen, const char *fmt, va_list arg) {
int ret;
char *p, *s, c, filler;
int i, precision, width;
bool_t is_long, left_align;
long l;
#if GFILE_ALLOW_FLOATS
float f;
char tmpbuf[2*MAX_FILLER + 1];
#else
char tmpbuf[MAX_FILLER + 1];
#endif
ret = 0;
if (maxlen < 0)
return 0;
if (!maxlen)
maxlen = -1;
while (*fmt) {
if (*fmt != '%') {
gfileWrite(f, fmt, 1);
ret++; if (!--maxlen) return ret;
fmt++;
continue;
}
fmt++;
p = s = tmpbuf;
left_align = FALSE;
filler = ' ';
width = 0;
precision = 0;
if (*fmt == '-') {
fmt++;
left_align = TRUE;
}
if (*fmt == '0') {
fmt++;
filler = '0';
}
while (1) {
c = *fmt++;
if (c >= '0' && c <= '9') {
c -= '0';
width = width * 10 + c;
} else if (c == '*')
width = va_arg(arg, int);
else
break;
}
if (c == '.') {
while (1) {
c = *fmt++;
if (c >= '0' && c <= '9') {
c -= '0';
precision = precision * 10 + c;
} else if (c == '*')
precision = va_arg(arg, int);
else
break;
}
}
/* Long modifier.*/
if (c == 'l' || c == 'L') {
is_long = TRUE;
if (*fmt)
c = *fmt++;
}
else
is_long = (c >= 'A') && (c <= 'Z');
/* Command decoding.*/
switch (c) {
case 0:
return ret;
case 'c':
filler = ' ';
*p++ = va_arg(arg, int);
break;
case 's':
filler = ' ';
if ((s = va_arg(arg, char *)) == 0)
s = "(null)";
if (precision == 0)
precision = 32767;
for (p = s; *p && (--precision >= 0); p++);
break;
case 'D':
case 'd':
if (is_long)
l = va_arg(arg, long);
else
l = va_arg(arg, int);
if (l < 0) {
*p++ = '-';
l = -l;
}
p = ltoa_wd(p, l, 10, 0);
break;
#if GFILE_ALLOW_FLOATS
case 'f':
f = (float) va_arg(arg, double);
if (f < 0) {
*p++ = '-';
f = -f;
}
l = f;
p = ltoa_wd(p, l, 10, 0);
*p++ = '.';
l = (f - l) * FLOAT_PRECISION;
p = ltoa_wd(p, l, 10, FLOAT_PRECISION / 10);
break;
#endif
case 'X':
case 'x':
c = 16;
goto unsigned_common;
case 'U':
case 'u':
c = 10;
goto unsigned_common;
case 'O':
case 'o':
c = 8;
unsigned_common:
if (is_long)
l = va_arg(arg, long);
else
l = va_arg(arg, int);
p = ltoa_wd(p, l, c, 0);
break;
default:
*p++ = c;
break;
}
i = (int)(p - s);
if ((width -= i) < 0)
width = 0;
if (left_align == FALSE)
width = -width;
if (width < 0) {
if (*s == '-' && filler == '0') {
gfileWrite(f, s++, 1);
ret++; if (!--maxlen) return ret;
i--;
}
do {
gfileWrite(f, &filler, 1);
ret++; if (!--maxlen) return ret;
} while (++width != 0);
}
while (--i >= 0) {
gfileWrite(f, s++, 1);
ret++; if (!--maxlen) return ret;
}
while (width) {
gfileWrite(f, &filler, 1);
ret++; if (!--maxlen) return ret;
width--;
}
}
return ret;
}
#endif //GFX_USE_GFILE && GFILE_NEED_PRINTG
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