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/*
* This file is part of the Micro Python project, http://micropython.org/
*
* The MIT License (MIT)
*
* Copyright (c) 2013, 2014 Damien P. George
*
* Permission is hereby granted, free of charge, to any person obtaining a copy
* of this software and associated documentation files (the "Software"), to deal
* in the Software without restriction, including without limitation the rights
* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
* copies of the Software, and to permit persons to whom the Software is
* furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
* THE SOFTWARE.
*/
#include <assert.h>
#include <string.h>
#include <stdarg.h>
#include "py/pfenv.h"
#if MICROPY_PY_BUILTINS_FLOAT
#include "py/formatfloat.h"
#endif
int pfenv_vprintf(const pfenv_t *pfenv, const char *fmt, va_list args) {
int chrs = 0;
for (;;) {
{
const char *f = fmt;
while (*f != '\0' && *f != '%') {
++f; // XXX UTF8 advance char
}
if (f > fmt) {
pfenv->print_strn(pfenv->data, fmt, f - fmt);
chrs += f - fmt;
fmt = f;
}
}
if (*fmt == '\0') {
break;
}
// move past % character
++fmt;
// parse flags, if they exist
int flags = 0;
char fill = ' ';
while (*fmt != '\0') {
if (*fmt == '-') flags |= PF_FLAG_LEFT_ADJUST;
else if (*fmt == '+') flags |= PF_FLAG_SHOW_SIGN;
else if (*fmt == ' ') flags |= PF_FLAG_SPACE_SIGN;
else if (*fmt == '!') flags |= PF_FLAG_NO_TRAILZ;
else if (*fmt == '0') {
flags |= PF_FLAG_PAD_AFTER_SIGN;
fill = '0';
} else break;
++fmt;
}
// parse width, if it exists
int width = 0;
for (; '0' <= *fmt && *fmt <= '9'; ++fmt) {
width = width * 10 + *fmt - '0';
}
// parse precision, if it exists
int prec = -1;
if (*fmt == '.') {
++fmt;
if (*fmt == '*') {
++fmt;
prec = va_arg(args, int);
} else {
prec = 0;
for (; '0' <= *fmt && *fmt <= '9'; ++fmt) {
prec = prec * 10 + *fmt - '0';
}
}
if (prec < 0) {
prec = 0;
}
}
// parse long specifiers (current not used)
//bool long_arg = false;
if (*fmt == 'l') {
++fmt;
//long_arg = true;
}
if (*fmt == '\0') {
break;
}
switch (*fmt) {
case 'b':
if (va_arg(args, int)) {
chrs += pfenv_print_strn(pfenv, "true", 4, flags, fill, width);
} else {
chrs += pfenv_print_strn(pfenv, "false", 5, flags, fill, width);
}
break;
case 'c':
{
char str = va_arg(args, int);
chrs += pfenv_print_strn(pfenv, &str, 1, flags, fill, width);
break;
}
case 's':
{
const char *str = va_arg(args, const char*);
if (str) {
if (prec < 0) {
prec = strlen(str);
}
chrs += pfenv_print_strn(pfenv, str, prec, flags, fill, width);
} else {
chrs += pfenv_print_strn(pfenv, "(null)", 6, flags, fill, width);
}
break;
}
case 'u':
chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 10, 'a', flags, fill, width);
break;
case 'd':
chrs += pfenv_print_int(pfenv, va_arg(args, int), 1, 10, 'a', flags, fill, width);
break;
case 'x':
chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 16, 'a', flags, fill, width);
break;
case 'X':
chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 16, 'A', flags, fill, width);
break;
case 'p':
case 'P': // don't bother to handle upcase for 'P'
chrs += pfenv_print_int(pfenv, va_arg(args, mp_uint_t), 0, 16, 'a', flags, fill, width);
break;
#if MICROPY_PY_BUILTINS_FLOAT
case 'e':
case 'E':
case 'f':
case 'F':
case 'g':
case 'G':
{
#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT
mp_float_t f = va_arg(args, double);
chrs += pfenv_print_float(pfenv, f, *fmt, flags, fill, width, prec);
#elif MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE
// Currently pfenv_print_float uses snprintf, but snprintf
// itself may be implemented in terms of pfenv_vprintf() for
// some ports. So, for extra caution, this case is handled
// with assert below. Note that currently ports which
// use MICROPY_FLOAT_IMPL_DOUBLE, don't call pfenv_vprintf()
// with float format specifier at all.
// TODO: resolve this completely
assert(0);
//#error Calling pfenv_print_float with double not supported from within printf
#else
#error Unknown MICROPY FLOAT IMPL
#endif
break;
}
#endif
default:
pfenv->print_strn(pfenv->data, fmt, 1);
chrs += 1;
break;
}
++fmt;
}
return chrs;
}
int pfenv_printf(const pfenv_t *pfenv, const char *fmt, ...) {
va_list ap;
va_start(ap, fmt);
int ret = pfenv_vprintf(pfenv, fmt, ap);
va_end(ap);
return ret;
}
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