[398] | 1 | /**
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| 2 | * @file ntstdio.c
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| 3 | * @author CuBeatSystems
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| 4 | * @author Shinichiro Nakamura
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| 5 | * @copyright
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| 6 | * ===============================================================
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| 7 | * Natural Tiny Shell (NT-Shell) Version 0.3.1
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| 8 | * ===============================================================
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| 9 | * Copyright (c) 2010-2016 Shinichiro Nakamura
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| 10 | *
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| 11 | * Permission is hereby granted, free of charge, to any person
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| 12 | * obtaining a copy of this software and associated documentation
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| 13 | * files (the "Software"), to deal in the Software without
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| 14 | * restriction, including without limitation the rights to use,
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| 15 | * copy, modify, merge, publish, distribute, sublicense, and/or
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| 16 | * sell copies of the Software, and to permit persons to whom the
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| 17 | * Software is furnished to do so, subject to the following
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| 18 | * conditions:
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| 19 | *
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| 20 | * The above copyright notice and this permission notice shall be
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| 21 | * included in all copies or substantial portions of the Software.
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| 22 | *
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| 23 | * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
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| 24 | * EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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| 25 | * OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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| 26 | * NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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| 27 | * HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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| 28 | * WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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| 29 | * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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| 30 | * OTHER DEALINGS IN THE SOFTWARE.
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| 31 | */
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| 32 |
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| 33 | /*------------------------------------------------------------------------/
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| 34 | / Universal string handler for user console interface
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| 35 | /-------------------------------------------------------------------------/
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| 36 | /
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| 37 | / Copyright (C) 2011, ChaN, all right reserved.
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| 38 | /
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| 39 | / * This software is a free software and there is NO WARRANTY.
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| 40 | / * No restriction on use. You can use, modify and redistribute it for
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| 41 | / personal, non-profit or commercial products UNDER YOUR RESPONSIBILITY.
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| 42 | / * Redistributions of source code must retain the above copyright notice.
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| 43 | /
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| 44 | /-------------------------------------------------------------------------*/
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| 45 |
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| 46 | #include <stdarg.h>
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| 47 | #include "ntstdio.h"
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| 48 |
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| 49 | #define FLAG_ZERO_PADDED (1 << 0)
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| 50 | #define FLAG_LEFT_JUSTIFIED (1 << 1)
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| 51 | #define FLAG_SIZE_LONG_INT (1 << 2)
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| 52 | #define FLAG_SIGNED_DECIMAL (1 << 3)
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| 53 | #define FLAG_SIZE_HALF_INT (1 << 4)
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| 54 |
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| 55 | /*
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| 56 | * ntstdio_printf("%d", 1234); "1234"
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| 57 | * ntstdio_printf("%6d,%3d%%", -200, 5); " -200, 5%"
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| 58 | * ntstdio_printf("%-6u", 100); "100 "
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| 59 | * ntstdio_printf("%ld", 12345678L); "12345678"
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| 60 | * ntstdio_printf("%04x", 0xA3); "00a3"
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| 61 | * ntstdio_printf("%08LX", 0x123ABC); "00123ABC"
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| 62 | * ntstdio_printf("%016b", 0x550F); "0101010100001111"
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| 63 | * ntstdio_printf("%s", "String"); "String"
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| 64 | * ntstdio_printf("%-4s", "abc"); "abc "
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| 65 | * ntstdio_printf("%4s", "abc"); " abc"
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| 66 | * ntstdio_printf("%c", 'a'); "a"
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| 67 | * ntstdio_printf("%f", 10.0); <ntstdio_printf lacks floating point support>
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| 68 | */
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| 69 |
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| 70 | static int xvprintf(ntstdio_t *handle, const char *fmt, va_list arp)
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| 71 | {
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| 72 | unsigned int i, j;
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| 73 | unsigned int flag, radix, width;
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| 74 | unsigned long value;
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| 75 | char s[16], c, d, *p;
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| 76 |
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| 77 | while (1) {
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| 78 | /*
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| 79 | * Get a character.
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| 80 | */
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| 81 | c = *fmt++;
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| 82 | if (!c) {
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| 83 | /*
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| 84 | * End of the format.
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| 85 | */
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| 86 | break;
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| 87 | }
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| 88 | if (c != '%') {
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| 89 | /*
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| 90 | * Pass through it if not a % sequense
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| 91 | */
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| 92 | ntstdio_putc(handle, c);
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| 93 | continue;
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| 94 | }
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| 95 |
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| 96 | /*
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| 97 | * Reset the flag.
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| 98 | */
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| 99 | flag = 0;
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| 100 |
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| 101 | /*
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| 102 | * Get the first character of the sequense.
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| 103 | */
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| 104 | c = *fmt++;
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| 105 | if (c == '0') {
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| 106 | flag = FLAG_ZERO_PADDED;
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| 107 | c = *fmt++;
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| 108 | }
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| 109 | else {
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| 110 | if (c == '-') {
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| 111 | flag = FLAG_LEFT_JUSTIFIED;
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| 112 | c = *fmt++;
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| 113 | }
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| 114 | }
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| 115 | /*
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| 116 | * Calculate the minimum width.
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| 117 | */
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| 118 | for (width = 0; (c >= '0') && (c <= '9'); c = *fmt++) {
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| 119 | width = (width * 10) + (c - '0');
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| 120 | }
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| 121 | if ((c == 'l') || (c == 'L')) {
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| 122 | flag |= FLAG_SIZE_LONG_INT;
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| 123 | c = *fmt++;
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| 124 | }
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| 125 | else if (c == 'h') { /* Prefix: Size is short int */
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| 126 | flag |= FLAG_SIZE_HALF_INT;
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| 127 | c = *fmt++;
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| 128 | }
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| 129 | if (!c) {
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| 130 | /*
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| 131 | * End of the format.
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| 132 | */
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| 133 | break;
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| 134 | }
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| 135 | d = c;
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| 136 | if (d >= 'a') {
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| 137 | d -= 0x20;
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| 138 | }
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| 139 | /* Type is... */
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| 140 | switch (d) {
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| 141 | case 'S':
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| 142 | /* String */
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| 143 | p = va_arg(arp, char*);
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| 144 | for (j = 0; p[j]; j++) {
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| 145 | }
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| 146 | while (!(flag & FLAG_LEFT_JUSTIFIED) && (j++ < width)) {
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| 147 | ntstdio_putc(handle, ' ');
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| 148 | }
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| 149 | ntstdio_puts(handle, p);
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| 150 | while (j++ < width) {
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| 151 | ntstdio_putc(handle, ' ');
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| 152 | }
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| 153 | continue;
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| 154 | case 'C':
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| 155 | /* Character */
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| 156 | ntstdio_putc(handle, (char)va_arg(arp, int));
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| 157 | continue;
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| 158 | case 'B':
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| 159 | /* Binary */
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| 160 | radix = 2;
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| 161 | break;
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| 162 | case 'O':
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| 163 | /* Octal */
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| 164 | radix = 8;
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| 165 | break;
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| 166 | case 'D':
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| 167 | /* Signed decimal */
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| 168 | radix = 10;
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| 169 | break;
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| 170 | case 'U':
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| 171 | /* Unsigned decimal */
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| 172 | radix = 10;
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| 173 | break;
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| 174 | case 'X':
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| 175 | /* Hexdecimal */
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| 176 | radix = 16;
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| 177 | break;
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| 178 | default:
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| 179 | /* Unknown type (passthrough) */
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| 180 | ntstdio_putc(handle, c);
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| 181 | continue;
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| 182 | }
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| 183 |
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| 184 | /*
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| 185 | * Get an argument and put it in numeral.
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| 186 | */
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| 187 | value = (flag & FLAG_SIZE_LONG_INT) ? va_arg(arp, long)
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| 188 | : (flag & FLAG_SIZE_HALF_INT) ? ((d == 'D') ? (long)((short)va_arg(arp, int)) : (long)((unsigned short)va_arg(arp, unsigned int)))
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| 189 | : ((d == 'D') ? (long)va_arg(arp, int) : (long)va_arg(arp, unsigned int));
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| 190 | if ((d == 'D') && (value & 0x80000000)) {
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| 191 | value = 0 - value;
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| 192 | flag |= FLAG_SIGNED_DECIMAL;
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| 193 | }
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| 194 | i = 0;
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| 195 | do {
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| 196 | d = (char)(value % radix);
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| 197 | value /= radix;
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| 198 | if (d > 9) {
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| 199 | d += (c == 'x') ? 0x27 : 0x07;
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| 200 | }
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| 201 | s[i++] = d + '0';
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| 202 | } while (value && (i < sizeof(s)));
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| 203 | if (flag & FLAG_SIGNED_DECIMAL) {
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| 204 | s[i++] = '-';
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| 205 | }
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| 206 | j = i;
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| 207 | d = (flag & FLAG_ZERO_PADDED) ? '0' : ' ';
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| 208 | while (!(flag & FLAG_LEFT_JUSTIFIED) && (j++ < width)) {
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| 209 | ntstdio_putc(handle, d);
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| 210 | }
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| 211 | do {
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| 212 | ntstdio_putc(handle, s[--i]);
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| 213 | } while (i);
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| 214 | while (j++ < width) {
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| 215 | ntstdio_putc(handle, ' ');
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| 216 | }
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| 217 | }
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| 218 |
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| 219 | return handle->pos;
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| 220 | }
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| 221 |
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| 222 | void ntstdio_init(ntstdio_t *handle, unsigned int option, NTSTDIO_XI xi, NTSTDIO_XO xo)
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| 223 | {
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| 224 | handle->xi = xi;
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| 225 | handle->xo = xo;
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| 226 | handle->pos = 0;
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| 227 | handle->option = option;
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| 228 | }
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| 229 |
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| 230 | static void _putc(ntstdio_t *handle, char c)
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| 231 | {
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| 232 | if (handle->xo) {
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| 233 | handle->xo(handle, (unsigned char)c);
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| 234 | }
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| 235 | handle->pos++;
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| 236 | }
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| 237 |
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| 238 | void ntstdio_putc(ntstdio_t *handle, char c)
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| 239 | {
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| 240 | if ((handle->option & NTSTDIO_OPTION_LF_CRLF) && (c == '\n')) {
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| 241 | _putc(handle, '\r');
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| 242 | _putc(handle, '\n');
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| 243 | }
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| 244 | else{
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| 245 | _putc(handle, c);
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| 246 | }
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| 247 | }
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| 248 |
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| 249 | void ntstdio_puts(ntstdio_t *handle, const char *str)
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| 250 | {
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| 251 | while (*str) {
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| 252 | ntstdio_putc(handle, *str++);
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| 253 | }
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| 254 | }
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| 255 |
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| 256 | void ntstdio_fputs(ntstdio_t *handle, NTSTDIO_XO xo, const char *str)
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| 257 | {
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| 258 | NTSTDIO_XO pf;
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| 259 |
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| 260 | /* Save current output device */
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| 261 | pf = handle->xo;
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| 262 | /* Switch output to specified device */
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| 263 | handle->xo = xo;
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| 264 |
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| 265 | while (*str) {
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| 266 | ntstdio_putc(handle, *str++);
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| 267 | }
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| 268 |
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| 269 | /* Restore output device */
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| 270 | handle->xo = pf;
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| 271 | }
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| 272 |
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| 273 | int ntstdio_printf(ntstdio_t *handle, const char *fmt, ...)
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| 274 | {
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| 275 | int result;
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| 276 | va_list arp;
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| 277 | va_start(arp, fmt);
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| 278 | result = xvprintf(handle, fmt, arp);
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| 279 | va_end(arp);
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| 280 | return result;
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| 281 | }
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| 282 |
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| 283 | struct put_buf_t {
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| 284 | char *outptr;
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| 285 | int len;
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| 286 | };
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| 287 |
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| 288 | static void put_buf(struct ntstdio_t *handle, unsigned char c)
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| 289 | {
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| 290 | struct put_buf_t *put_buf = (struct put_buf_t *)handle->exinf;
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| 291 | if ((handle->pos + 1) >= put_buf->len)
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| 292 | return;
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| 293 | put_buf->outptr[handle->pos] = (char)c;
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| 294 | handle->pos++;
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| 295 | }
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| 296 |
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| 297 | int ntstdio_snprintf(char *buf, int len, const char *fmt, ...)
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| 298 | {
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| 299 | int result;
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| 300 | ntstdio_t handle;
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| 301 | struct put_buf_t exinf;
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| 302 | va_list arp;
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| 303 | /* Switch destination for memory */
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| 304 | handle.xo = put_buf;
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| 305 | handle.option = 0;
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| 306 | handle.pos = 0;
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| 307 | handle.exinf = &exinf;
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| 308 | exinf.outptr = buf;
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| 309 | exinf.len = len;
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| 310 |
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| 311 | va_start(arp, fmt);
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| 312 | result = xvprintf(&handle, fmt, arp);
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| 313 | va_end(arp);
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| 314 |
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| 315 | /* Terminate output string with a \0 */
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| 316 | buf[handle.pos] = '\0';
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| 317 | return result;
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| 318 | }
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| 319 |
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| 320 | int ntstdio_fprintf(ntstdio_t *handle, NTSTDIO_XO xo, const char *fmt, ...)
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| 321 | {
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| 322 | int result;
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| 323 | va_list arp;
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| 324 | NTSTDIO_XO pf;
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| 325 |
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| 326 | /* Save current output device */
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| 327 | pf = handle->xo;
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| 328 | /* Switch output to specified device */
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| 329 | handle->xo = xo;
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| 330 |
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| 331 | va_start(arp, fmt);
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| 332 | result = xvprintf(handle, fmt, arp);
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| 333 | va_end(arp);
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| 334 |
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| 335 | /* Restore output device */
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| 336 | handle->xo = pf;
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| 337 | return result;
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| 338 | }
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| 339 |
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| 340 | int ntstdio_getc(ntstdio_t *handle)
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| 341 | {
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| 342 | extern void shell_exit(int cd);
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| 343 |
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| 344 | int c = handle->xi(handle);
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| 345 | if (handle->option & NTSTDIO_OPTION_LF_CR) {
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| 346 | if (c == '\r')
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| 347 | c = '\n';
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| 348 | }
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| 349 | if (handle->option & NTSTDIO_OPTION_CANON) {
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| 350 | if (c == 0x03)
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| 351 | shell_exit(-1);
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| 352 | }
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| 353 | if (handle->option & NTSTDIO_OPTION_LINE_ECHO) {
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| 354 | ntstdio_putc(handle, c);
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| 355 | }
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| 356 | return c;
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| 357 | }
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| 358 |
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| 359 | /* 0:End of stream, 1:A line arrived */
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| 360 | int ntstdio_gets(ntstdio_t *handle, char *buf, int len)
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| 361 | {
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| 362 | int c, i;
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| 363 |
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| 364 | if (!handle->xi) {
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| 365 | /* No input function specified */
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| 366 | return 0;
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| 367 | }
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| 368 |
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| 369 | i = 0;
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| 370 | for (;;) {
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| 371 | /* Get a char from the incoming stream */
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| 372 | c = handle->xi(handle);
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| 373 | if (!c) {
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| 374 | /* End of stream */
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| 375 | return 0;
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| 376 | }
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| 377 | if (c == '\r') {
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| 378 | /* End of line */
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| 379 | break;
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| 380 | }
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| 381 | if ((c == '\b') && i) {
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| 382 | /* Back space */
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| 383 | i--;
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| 384 | if (handle->option & NTSTDIO_OPTION_LINE_ECHO) {
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| 385 | ntstdio_putc(handle, c);
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| 386 | }
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| 387 | continue;
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| 388 | }
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| 389 | if ((c >= ' ') && (i < len - 1)) {
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| 390 | /* Visible chars */
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| 391 | buf[i++] = c;
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| 392 | if (handle->option & NTSTDIO_OPTION_LINE_ECHO) {
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| 393 | ntstdio_putc(handle, c);
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| 394 | }
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| 395 | }
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| 396 | }
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| 397 | buf[i] = 0;
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| 398 | /* Terminate with a \0 */
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| 399 | if (handle->option & NTSTDIO_OPTION_LINE_ECHO) {
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| 400 | ntstdio_putc(handle, '\n');
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| 401 | }
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| 402 | return 1;
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| 403 | }
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| 404 |
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| 405 | /* 0:End of stream, 1:A line arrived */
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| 406 | int ntstdio_fgets(ntstdio_t *handle, NTSTDIO_XI xi, char *buf, int len)
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| 407 | {
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| 408 | NTSTDIO_XI pf;
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| 409 | int n;
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| 410 |
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| 411 | /* Save current input device */
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| 412 | pf = handle->xi;
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| 413 | /* Switch input to specified device */
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| 414 | handle->xi = xi;
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| 415 | /* Get a line */
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| 416 | n = ntstdio_gets(handle, buf, len);
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| 417 | /* Restore input device */
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| 418 | handle->xi = pf;
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| 419 |
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| 420 | return n;
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| 421 | }
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