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| 1 | +/* |
| 2 | + * This file is part of the Micro Python project, http://micropython.org/ |
| 3 | + * |
| 4 | + * The MIT License (MIT) |
| 5 | + * |
| 6 | + * Copyright (c) 2013, 2014 Damien P. George |
| 7 | + * |
| 8 | + * Permission is hereby granted, free of charge, to any person obtaining a copy |
| 9 | + * of this software and associated documentation files (the "Software"), to deal |
| 10 | + * in the Software without restriction, including without limitation the rights |
| 11 | + * to use, copy, modify, merge, publish, distribute, sublicense, and/or sell |
| 12 | + * copies of the Software, and to permit persons to whom the Software is |
| 13 | + * furnished to do so, subject to the following conditions: |
| 14 | + * |
| 15 | + * The above copyright notice and this permission notice shall be included in |
| 16 | + * all copies or substantial portions of the Software. |
| 17 | + * |
| 18 | + * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR |
| 19 | + * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY, |
| 20 | + * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE |
| 21 | + * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER |
| 22 | + * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, |
| 23 | + * OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN |
| 24 | + * THE SOFTWARE. |
| 25 | + */ |
| 26 | + |
| 27 | +#include <assert.h> |
| 28 | +#include <stdio.h> |
| 29 | +#include <stdint.h> |
| 30 | +#include <string.h> |
| 31 | +#include <stdarg.h> |
| 32 | + |
| 33 | +#include "mpconfig.h" |
| 34 | +#include "misc.h" |
| 35 | +#include "qstr.h" |
| 36 | +#include "obj.h" |
| 37 | +#include "pfenv.h" |
| 38 | + |
| 39 | +#if MICROPY_PY_BUILTINS_FLOAT |
| 40 | +#include "formatfloat.h" |
| 41 | +#endif |
| 42 | + |
| 43 | +int pfenv_vprintf(const pfenv_t *pfenv, const char *fmt, va_list args) { |
| 44 | + int chrs = 0; |
| 45 | + for (;;) { |
| 46 | + { |
| 47 | + const char *f = fmt; |
| 48 | + while (*f != '\0' && *f != '%') { |
| 49 | + ++f; // XXX UTF8 advance char |
| 50 | + } |
| 51 | + if (f > fmt) { |
| 52 | + pfenv->print_strn(pfenv->data, fmt, f - fmt); |
| 53 | + chrs += f - fmt; |
| 54 | + fmt = f; |
| 55 | + } |
| 56 | + } |
| 57 | + |
| 58 | + if (*fmt == '\0') { |
| 59 | + break; |
| 60 | + } |
| 61 | + |
| 62 | + // move past % character |
| 63 | + ++fmt; |
| 64 | + |
| 65 | + // parse flags, if they exist |
| 66 | + int flags = 0; |
| 67 | + char fill = ' '; |
| 68 | + while (*fmt != '\0') { |
| 69 | + if (*fmt == '-') flags |= PF_FLAG_LEFT_ADJUST; |
| 70 | + else if (*fmt == '+') flags |= PF_FLAG_SHOW_SIGN; |
| 71 | + else if (*fmt == ' ') flags |= PF_FLAG_SPACE_SIGN; |
| 72 | + else if (*fmt == '!') flags |= PF_FLAG_NO_TRAILZ; |
| 73 | + else if (*fmt == '0') { |
| 74 | + flags |= PF_FLAG_PAD_AFTER_SIGN; |
| 75 | + fill = '0'; |
| 76 | + } else break; |
| 77 | + ++fmt; |
| 78 | + } |
| 79 | + |
| 80 | + // parse width, if it exists |
| 81 | + int width = 0; |
| 82 | + for (; '0' <= *fmt && *fmt <= '9'; ++fmt) { |
| 83 | + width = width * 10 + *fmt - '0'; |
| 84 | + } |
| 85 | + |
| 86 | + // parse precision, if it exists |
| 87 | + int prec = -1; |
| 88 | + if (*fmt == '.') { |
| 89 | + ++fmt; |
| 90 | + if (*fmt == '*') { |
| 91 | + ++fmt; |
| 92 | + prec = va_arg(args, int); |
| 93 | + } else { |
| 94 | + prec = 0; |
| 95 | + for (; '0' <= *fmt && *fmt <= '9'; ++fmt) { |
| 96 | + prec = prec * 10 + *fmt - '0'; |
| 97 | + } |
| 98 | + } |
| 99 | + if (prec < 0) { |
| 100 | + prec = 0; |
| 101 | + } |
| 102 | + } |
| 103 | + |
| 104 | + // parse long specifiers (current not used) |
| 105 | + //bool long_arg = false; |
| 106 | + if (*fmt == 'l') { |
| 107 | + ++fmt; |
| 108 | + //long_arg = true; |
| 109 | + } |
| 110 | + |
| 111 | + if (*fmt == '\0') { |
| 112 | + break; |
| 113 | + } |
| 114 | + |
| 115 | + switch (*fmt) { |
| 116 | + case 'b': |
| 117 | + if (va_arg(args, int)) { |
| 118 | + chrs += pfenv_print_strn(pfenv, "true", 4, flags, fill, width); |
| 119 | + } else { |
| 120 | + chrs += pfenv_print_strn(pfenv, "false", 5, flags, fill, width); |
| 121 | + } |
| 122 | + break; |
| 123 | + case 'c': |
| 124 | + { |
| 125 | + char str = va_arg(args, int); |
| 126 | + chrs += pfenv_print_strn(pfenv, &str, 1, flags, fill, width); |
| 127 | + break; |
| 128 | + } |
| 129 | + case 's': |
| 130 | + { |
| 131 | + const char *str = va_arg(args, const char*); |
| 132 | + if (str) { |
| 133 | + if (prec < 0) { |
| 134 | + prec = strlen(str); |
| 135 | + } |
| 136 | + chrs += pfenv_print_strn(pfenv, str, prec, flags, fill, width); |
| 137 | + } else { |
| 138 | + chrs += pfenv_print_strn(pfenv, "(null)", 6, flags, fill, width); |
| 139 | + } |
| 140 | + break; |
| 141 | + } |
| 142 | + case 'u': |
| 143 | + chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 10, 'a', flags, fill, width); |
| 144 | + break; |
| 145 | + case 'd': |
| 146 | + chrs += pfenv_print_int(pfenv, va_arg(args, int), 1, 10, 'a', flags, fill, width); |
| 147 | + break; |
| 148 | + case 'x': |
| 149 | + case 'p': // ? |
| 150 | + chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 16, 'a', flags, fill, width); |
| 151 | + break; |
| 152 | + case 'X': |
| 153 | + case 'P': // ? |
| 154 | + chrs += pfenv_print_int(pfenv, va_arg(args, int), 0, 16, 'A', flags, fill, width); |
| 155 | + break; |
| 156 | +#if MICROPY_PY_BUILTINS_FLOAT |
| 157 | + case 'e': |
| 158 | + case 'E': |
| 159 | + case 'f': |
| 160 | + case 'F': |
| 161 | + case 'g': |
| 162 | + case 'G': |
| 163 | + { |
| 164 | +#if MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_FLOAT |
| 165 | + mp_float_t f = va_arg(args, double); |
| 166 | + chrs += pfenv_print_float(pfenv, f, *fmt, flags, fill, width, prec); |
| 167 | +#elif MICROPY_FLOAT_IMPL == MICROPY_FLOAT_IMPL_DOUBLE |
| 168 | + // Currently pfenv_print_float uses snprintf, but snprintf |
| 169 | + // itself may be implemented in terms of pfenv_vprintf() for |
| 170 | + // some ports. So, for extra caution, this case is handled |
| 171 | + // with assert below. Note that currently ports which |
| 172 | + // use MICROPY_FLOAT_IMPL_DOUBLE, don't call pfenv_vprintf() |
| 173 | + // with float format specifier at all. |
| 174 | + // TODO: resolve this completely |
| 175 | + assert(0); |
| 176 | +//#error Calling pfenv_print_float with double not supported from within printf |
| 177 | +#else |
| 178 | +#error Unknown MICROPY FLOAT IMPL |
| 179 | +#endif |
| 180 | + break; |
| 181 | + } |
| 182 | +#endif |
| 183 | + default: |
| 184 | + pfenv->print_strn(pfenv->data, fmt, 1); |
| 185 | + chrs += 1; |
| 186 | + break; |
| 187 | + } |
| 188 | + ++fmt; |
| 189 | + } |
| 190 | + return chrs; |
| 191 | +} |
| 192 | + |
| 193 | +int pfenv_printf(const pfenv_t *pfenv, const char *fmt, ...) { |
| 194 | + va_list ap; |
| 195 | + va_start(ap, fmt); |
| 196 | + int ret = pfenv_vprintf(pfenv, fmt, ap); |
| 197 | + va_end(ap); |
| 198 | + return ret; |
| 199 | +} |
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