577 lines
18 KiB
C
577 lines
18 KiB
C
/*
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* This file is part of the MicroPython project, http://micropython.org/
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*
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* The MIT License (MIT)
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*
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* Copyright (c) 2013-2015 Damien P. George
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*
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* Permission is hereby granted, free of charge, to any person obtaining a copy
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* of this software and associated documentation files (the "Software"), to deal
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* in the Software without restriction, including without limitation the rights
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* to use, copy, modify, merge, publish, distribute, sublicense, and/or sell
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* copies of the Software, and to permit persons to whom the Software is
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* furnished to do so, subject to the following conditions:
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*
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* The above copyright notice and this permission notice shall be included in
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* all copies or substantial portions of the Software.
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*
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* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
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* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
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* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
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* AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
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* LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM,
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* OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN
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* THE SOFTWARE.
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*/
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#include <assert.h>
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#include <stdarg.h>
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#include <stdint.h>
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#include <stdio.h>
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#include <string.h>
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#include "py/mphal.h"
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#include "py/mpprint.h"
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#include "py/obj.h"
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#include "py/objint.h"
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#include "py/runtime.h"
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#if MICROPY_PY_BUILTINS_FLOAT
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#include "py/formatfloat.h"
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#endif
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static const char pad_spaces[] = " ";
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static const char pad_zeroes[] = "0000000000000000";
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STATIC void plat_print_strn(void *env, const char *str, size_t len) {
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(void)env;
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MP_PLAT_PRINT_STRN(str, len);
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}
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const mp_print_t mp_plat_print = {NULL, plat_print_strn};
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int mp_print_str(const mp_print_t *print, const char *str) {
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size_t len = strlen(str);
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if (len) {
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print->print_strn(print->data, str, len);
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}
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return len;
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}
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int mp_print_strn(const mp_print_t *print, const char *str, size_t len, int flags, char fill, int width) {
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int left_pad = 0;
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int right_pad = 0;
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int pad = width - len;
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int pad_size;
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int total_chars_printed = 0;
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const char *pad_chars;
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if (!fill || fill == ' ') {
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pad_chars = pad_spaces;
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pad_size = sizeof(pad_spaces) - 1;
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} else if (fill == '0') {
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pad_chars = pad_zeroes;
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pad_size = sizeof(pad_zeroes) - 1;
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} else {
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// Other pad characters are fairly unusual, so we'll take the hit
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// and output them 1 at a time.
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pad_chars = &fill;
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pad_size = 1;
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}
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if (flags & PF_FLAG_CENTER_ADJUST) {
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left_pad = pad / 2;
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right_pad = pad - left_pad;
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} else if (flags & PF_FLAG_LEFT_ADJUST) {
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right_pad = pad;
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} else {
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left_pad = pad;
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}
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if (left_pad > 0) {
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total_chars_printed += left_pad;
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while (left_pad > 0) {
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int p = left_pad;
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if (p > pad_size) {
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p = pad_size;
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}
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print->print_strn(print->data, pad_chars, p);
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left_pad -= p;
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}
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}
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if (len) {
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print->print_strn(print->data, str, len);
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total_chars_printed += len;
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}
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if (right_pad > 0) {
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total_chars_printed += right_pad;
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while (right_pad > 0) {
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int p = right_pad;
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if (p > pad_size) {
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p = pad_size;
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}
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print->print_strn(print->data, pad_chars, p);
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right_pad -= p;
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}
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}
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return total_chars_printed;
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}
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// 32-bits is 10 digits, add 3 for commas, 1 for sign, 1 for terminating null
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// We can use 16 characters for 32-bit and 32 characters for 64-bit
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#define INT_BUF_SIZE (sizeof(mp_int_t) * 4)
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// Our mp_vprintf function below does not support the '#' format modifier to
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// print the prefix of a non-base-10 number, so we don't need code for this.
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#define SUPPORT_INT_BASE_PREFIX (0)
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// This function is used exclusively by mp_vprintf to format ints.
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// It needs to be a separate function to mp_print_mp_int, since converting to a mp_int looses the MSB.
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STATIC int mp_print_int(const mp_print_t *print, mp_uint_t x, int sgn, int base, int base_char, int flags, char fill, int width) {
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char sign = 0;
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if (sgn) {
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if ((mp_int_t)x < 0) {
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sign = '-';
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x = -x;
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} else if (flags & PF_FLAG_SHOW_SIGN) {
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sign = '+';
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} else if (flags & PF_FLAG_SPACE_SIGN) {
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sign = ' ';
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}
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}
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char buf[INT_BUF_SIZE];
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char *b = buf + INT_BUF_SIZE;
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if (x == 0) {
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*(--b) = '0';
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} else {
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do {
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int c = x % base;
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x /= base;
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if (c >= 10) {
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c += base_char - 10;
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} else {
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c += '0';
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}
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*(--b) = c;
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} while (b > buf && x != 0);
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}
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#if SUPPORT_INT_BASE_PREFIX
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char prefix_char = '\0';
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if (flags & PF_FLAG_SHOW_PREFIX) {
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if (base == 2) {
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prefix_char = base_char + 'b' - 'a';
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} else if (base == 8) {
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prefix_char = base_char + 'o' - 'a';
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} else if (base == 16) {
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prefix_char = base_char + 'x' - 'a';
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}
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}
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#endif
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int len = 0;
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if (flags & PF_FLAG_PAD_AFTER_SIGN) {
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if (sign) {
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len += mp_print_strn(print, &sign, 1, flags, fill, 1);
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width--;
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}
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#if SUPPORT_INT_BASE_PREFIX
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if (prefix_char) {
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len += mp_print_strn(print, "0", 1, flags, fill, 1);
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len += mp_print_strn(print, &prefix_char, 1, flags, fill, 1);
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width -= 2;
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}
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#endif
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} else {
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#if SUPPORT_INT_BASE_PREFIX
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if (prefix_char && b > &buf[1]) {
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*(--b) = prefix_char;
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*(--b) = '0';
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}
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#endif
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if (sign && b > buf) {
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*(--b) = sign;
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}
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}
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len += mp_print_strn(print, b, buf + INT_BUF_SIZE - b, flags, fill, width);
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return len;
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}
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int mp_print_mp_int(const mp_print_t *print, mp_obj_t x, int base, int base_char, int flags, char fill, int width, int prec) {
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// These are the only values for "base" that are required to be supported by this
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// function, since Python only allows the user to format integers in these bases.
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// If needed this function could be generalised to handle other values.
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assert(base == 2 || base == 8 || base == 10 || base == 16);
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if (!mp_obj_is_int(x)) {
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// This will convert booleans to int, or raise an error for
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// non-integer types.
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x = MP_OBJ_NEW_SMALL_INT(mp_obj_get_int(x));
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}
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if ((flags & (PF_FLAG_LEFT_ADJUST | PF_FLAG_CENTER_ADJUST)) == 0 && fill == '0') {
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if (prec > width) {
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width = prec;
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}
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prec = 0;
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}
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char prefix_buf[4];
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char *prefix = prefix_buf;
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if (mp_obj_int_sign(x) >= 0) {
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if (flags & PF_FLAG_SHOW_SIGN) {
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*prefix++ = '+';
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} else if (flags & PF_FLAG_SPACE_SIGN) {
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*prefix++ = ' ';
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}
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}
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if (flags & PF_FLAG_SHOW_PREFIX) {
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if (base == 2) {
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*prefix++ = '0';
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*prefix++ = base_char + 'b' - 'a';
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} else if (base == 8) {
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*prefix++ = '0';
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if (flags & PF_FLAG_SHOW_OCTAL_LETTER) {
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*prefix++ = base_char + 'o' - 'a';
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}
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} else if (base == 16) {
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*prefix++ = '0';
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*prefix++ = base_char + 'x' - 'a';
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}
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}
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*prefix = '\0';
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int prefix_len = prefix - prefix_buf;
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prefix = prefix_buf;
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char comma = '\0';
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if (flags & PF_FLAG_SHOW_COMMA) {
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comma = ',';
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}
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// The size of this buffer is rather arbitrary. If it's not large
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// enough, a dynamic one will be allocated.
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char stack_buf[sizeof(mp_int_t) * 4];
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char *buf = stack_buf;
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size_t buf_size = sizeof(stack_buf);
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size_t fmt_size = 0;
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char *str;
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if (prec > 1) {
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flags |= PF_FLAG_PAD_AFTER_SIGN;
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}
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char sign = '\0';
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if (flags & PF_FLAG_PAD_AFTER_SIGN) {
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// We add the pad in this function, so since the pad goes after
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// the sign & prefix, we format without a prefix
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str = mp_obj_int_formatted(&buf, &buf_size, &fmt_size,
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x, base, NULL, base_char, comma);
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if (*str == '-') {
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sign = *str++;
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fmt_size--;
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}
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} else {
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str = mp_obj_int_formatted(&buf, &buf_size, &fmt_size,
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x, base, prefix, base_char, comma);
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}
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int spaces_before = 0;
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int spaces_after = 0;
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if (prec > 1) {
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// If prec was specified, then prec specifies the width to zero-pad the
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// the number to. This zero-padded number then gets left or right
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// aligned in width characters.
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int prec_width = fmt_size; // The digits
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if (prec_width < prec) {
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prec_width = prec;
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}
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if (flags & PF_FLAG_PAD_AFTER_SIGN) {
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if (sign) {
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prec_width++;
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}
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prec_width += prefix_len;
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}
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if (prec_width < width) {
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if (flags & PF_FLAG_LEFT_ADJUST) {
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spaces_after = width - prec_width;
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} else {
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spaces_before = width - prec_width;
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}
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}
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fill = '0';
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flags &= ~PF_FLAG_LEFT_ADJUST;
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}
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int len = 0;
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if (spaces_before) {
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len += mp_print_strn(print, "", 0, 0, ' ', spaces_before);
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}
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if (flags & PF_FLAG_PAD_AFTER_SIGN) {
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// pad after sign implies pad after prefix as well.
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if (sign) {
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len += mp_print_strn(print, &sign, 1, 0, 0, 1);
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width--;
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}
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if (prefix_len) {
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len += mp_print_strn(print, prefix, prefix_len, 0, 0, 1);
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width -= prefix_len;
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}
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}
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if (prec > 1) {
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width = prec;
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}
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len += mp_print_strn(print, str, fmt_size, flags, fill, width);
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if (spaces_after) {
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len += mp_print_strn(print, "", 0, 0, ' ', spaces_after);
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}
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if (buf != stack_buf) {
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m_del(char, buf, buf_size);
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}
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return len;
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}
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#if MICROPY_PY_BUILTINS_FLOAT
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int mp_print_float(const mp_print_t *print, mp_float_t f, char fmt, int flags, char fill, int width, int prec) {
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char buf[32];
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char sign = '\0';
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int chrs = 0;
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if (flags & PF_FLAG_SHOW_SIGN) {
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sign = '+';
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} else
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if (flags & PF_FLAG_SPACE_SIGN) {
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sign = ' ';
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}
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int len = mp_format_float(f, buf, sizeof(buf), fmt, prec, sign);
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char *s = buf;
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if ((flags & PF_FLAG_ADD_PERCENT) && (size_t)(len + 1) < sizeof(buf)) {
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buf[len++] = '%';
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buf[len] = '\0';
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}
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// buf[0] < '0' returns true if the first character is space, + or -
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if ((flags & PF_FLAG_PAD_AFTER_SIGN) && buf[0] < '0') {
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// We have a sign character
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s++;
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chrs += mp_print_strn(print, &buf[0], 1, 0, 0, 1);
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width--;
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len--;
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}
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chrs += mp_print_strn(print, s, len, flags, fill, width);
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return chrs;
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}
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#endif
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int mp_printf(const mp_print_t *print, const char *fmt, ...) {
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va_list ap;
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va_start(ap, fmt);
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int ret = mp_vprintf(print, fmt, ap);
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va_end(ap);
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return ret;
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}
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int mp_vprintf(const mp_print_t *print, const char *fmt, va_list args) {
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int chrs = 0;
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for (;;) {
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{
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const char *f = fmt;
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while (*f != '\0' && *f != '%') {
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++f; // XXX UTF8 advance char
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}
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if (f > fmt) {
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print->print_strn(print->data, fmt, f - fmt);
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chrs += f - fmt;
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fmt = f;
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}
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}
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if (*fmt == '\0') {
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break;
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}
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// move past % character
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++fmt;
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// parse flags, if they exist
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int flags = 0;
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char fill = ' ';
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while (*fmt != '\0') {
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if (*fmt == '-') {
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flags |= PF_FLAG_LEFT_ADJUST;
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} else if (*fmt == '+') {
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flags |= PF_FLAG_SHOW_SIGN;
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} else if (*fmt == ' ') {
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flags |= PF_FLAG_SPACE_SIGN;
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} else if (*fmt == '!') {
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flags |= PF_FLAG_NO_TRAILZ;
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} else if (*fmt == '0') {
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flags |= PF_FLAG_PAD_AFTER_SIGN;
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fill = '0';
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} else {
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break;
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}
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++fmt;
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}
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// parse width, if it exists
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int width = 0;
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for (; '0' <= *fmt && *fmt <= '9'; ++fmt) {
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width = width * 10 + *fmt - '0';
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}
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// parse precision, if it exists
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int prec = -1;
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if (*fmt == '.') {
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++fmt;
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if (*fmt == '*') {
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++fmt;
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prec = va_arg(args, int);
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} else {
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prec = 0;
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for (; '0' <= *fmt && *fmt <= '9'; ++fmt) {
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prec = prec * 10 + *fmt - '0';
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}
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}
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if (prec < 0) {
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prec = 0;
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}
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}
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// parse long specifiers (only for LP64 model where they make a difference)
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#ifndef __LP64__
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const
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#endif
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bool long_arg = false;
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if (*fmt == 'l') {
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++fmt;
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#ifdef __LP64__
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long_arg = true;
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#endif
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}
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if (*fmt == '\0') {
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break;
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}
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switch (*fmt) {
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case 'b':
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if (va_arg(args, int)) {
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chrs += mp_print_strn(print, "true", 4, flags, fill, width);
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} else {
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chrs += mp_print_strn(print, "false", 5, flags, fill, width);
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}
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break;
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case 'c': {
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char str = va_arg(args, int);
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chrs += mp_print_strn(print, &str, 1, flags, fill, width);
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break;
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}
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case 'q': {
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qstr qst = va_arg(args, qstr);
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size_t len;
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const char *str = (const char *)qstr_data(qst, &len);
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if (prec >= 0 && (size_t)prec < len) {
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len = prec;
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}
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chrs += mp_print_strn(print, str, len, flags, fill, width);
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break;
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}
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case 's': {
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const char *str = va_arg(args, const char *);
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#ifndef NDEBUG
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// With debugging enabled, catch printing of null string pointers
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if (prec != 0 && str == NULL) {
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chrs += mp_print_strn(print, "(null)", 6, flags, fill, width);
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break;
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}
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#endif
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size_t len = strlen(str);
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if (prec >= 0 && (size_t)prec < len) {
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len = prec;
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}
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chrs += mp_print_strn(print, str, len, flags, fill, width);
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break;
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}
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case 'd': {
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mp_int_t val;
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if (long_arg) {
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val = va_arg(args, long int);
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} else {
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val = va_arg(args, int);
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}
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chrs += mp_print_int(print, val, 1, 10, 'a', flags, fill, width);
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break;
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}
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case 'u':
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case 'x':
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case 'X': {
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int base = 16 - ((*fmt + 1) & 6); // maps char u/x/X to base 10/16/16
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char fmt_c = (*fmt & 0xf0) - 'P' + 'A'; // maps char u/x/X to char a/a/A
|
|
mp_uint_t val;
|
|
if (long_arg) {
|
|
val = va_arg(args, unsigned long int);
|
|
} else {
|
|
val = va_arg(args, unsigned int);
|
|
}
|
|
chrs += mp_print_int(print, val, 0, base, fmt_c, flags, fill, width);
|
|
break;
|
|
}
|
|
case 'p':
|
|
case 'P': // don't bother to handle upcase for 'P'
|
|
// Use unsigned long int to work on both ILP32 and LP64 systems
|
|
chrs += mp_print_int(print, va_arg(args, unsigned long int), 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) || (MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE))
|
|
mp_float_t f = (mp_float_t)va_arg(args, double);
|
|
chrs += mp_print_float(print, f, *fmt, flags, fill, width, prec);
|
|
#else
|
|
#error Unknown MICROPY FLOAT IMPL
|
|
#endif
|
|
break;
|
|
}
|
|
#endif
|
|
// Because 'l' is eaten above, another 'l' means %ll. We need to support
|
|
// this length specifier for OBJ_REPR_D (64-bit NaN boxing).
|
|
// TODO Either enable this unconditionally, or provide a specific config var.
|
|
#if (MICROPY_OBJ_REPR == MICROPY_OBJ_REPR_D) || defined(_WIN64)
|
|
case 'l': {
|
|
unsigned long long int arg_value = va_arg(args, unsigned long long int);
|
|
++fmt;
|
|
assert(*fmt == 'u' || *fmt == 'd' || !"unsupported fmt char");
|
|
chrs += mp_print_int(print, arg_value, *fmt == 'd', 10, 'a', flags, fill, width);
|
|
break;
|
|
}
|
|
#endif
|
|
default:
|
|
// if it's not %% then it's an unsupported format character
|
|
assert(*fmt == '%' || !"unsupported fmt char");
|
|
print->print_strn(print->data, fmt, 1);
|
|
chrs += 1;
|
|
break;
|
|
}
|
|
++fmt;
|
|
}
|
|
return chrs;
|
|
}
|