[337] | 1 | /**
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| 2 | * @file ntopt.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 | #include <string.h>
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| 34 | #include "ntopt.h"
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| 35 |
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| 36 | /**
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| 37 | * @brief Is the character delimiter?
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| 38 | * @param c The character.
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| 39 | * @retval true It's a delimiter.
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| 40 | * @retval false It's not a delimiter.
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| 41 | */
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| 42 | #define IS_DELIM(c) \
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| 43 | (((c) == '\r') || ((c) == '\n') || ((c) == '\t') || ((c) == '\0') || ((c) == ' '))
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| 44 |
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| 45 | static int ntopt_get_count(const char *str);
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| 46 | static char *ntopt_get_text(
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| 47 | const char *str, const int n, char *buf, int siz, int *len);
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| 48 |
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| 49 | /**
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| 50 | * @brief Get the sentence count of the given text string.
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| 51 | * @param str A text string.
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| 52 | * @return Count of the given sentence.
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| 53 | */
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| 54 | static int ntopt_get_count(const char *str)
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| 55 | {
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| 56 | int cnt = 0;
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| 57 | int wc = 0;
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| 58 | char *p = (char *)str;
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| 59 | while (*p) {
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| 60 | if (!IS_DELIM(*p)) {
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| 61 | wc++;
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| 62 | if (wc == 1) {
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| 63 | cnt++;
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| 64 | }
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| 65 | }
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| 66 | else {
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| 67 | wc = 0;
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| 68 | }
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| 69 | p++;
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| 70 | }
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| 71 | return cnt;
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| 72 | }
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| 73 |
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| 74 | /**
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| 75 | * @brief Get the sentence of the given text string.
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| 76 | * @param str A text string.
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| 77 | * @param n Index number. (0 to ntopt-get_count(str) - 1)
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| 78 | * @param buf The pointer to a stored buffer.
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| 79 | * @param siz The size of the stored buffer.
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| 80 | * @param len The stored string length.
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| 81 | * @retval !NULL Success. The pointer to the buffer.
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| 82 | * @retval NULL Failure.
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| 83 | */
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| 84 | static char *ntopt_get_text(
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| 85 | const char *str, const int n, char *buf, int siz, int *len)
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| 86 | {
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| 87 | int cnt = 0;
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| 88 | int wc = 0;
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| 89 | char *p = (char *)str;
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| 90 | *len = 0;
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| 91 | while (*p) {
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| 92 | if (!IS_DELIM(*p)) {
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| 93 | wc++;
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| 94 | if (wc == 1) {
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| 95 | if (cnt == n) {
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| 96 | char *des = buf;
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| 97 | int cc = 0;
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| 98 | while (!IS_DELIM(*p)) {
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| 99 | cc++;
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| 100 | if (siz <= cc) {
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| 101 | break;
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| 102 | }
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| 103 | *des = *p;
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| 104 | des++;
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| 105 | p++;
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| 106 | }
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| 107 | *des = '\0';
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| 108 | *len = cc;
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| 109 | return buf;
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| 110 | }
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| 111 | cnt++;
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| 112 | }
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| 113 | }
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| 114 | else {
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| 115 | wc = 0;
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| 116 | }
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| 117 | p++;
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| 118 | }
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| 119 | return (char *)0;
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| 120 | }
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| 121 |
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| 122 | /**
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| 123 | * @brief Parse the given text string.
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| 124 | * @param str A text string.
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| 125 | * @param func The callback function.
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| 126 | * @param extobj An external object for the callback function.
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| 127 | * @return The return value from the callback.
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| 128 | */
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| 129 | int ntopt_parse(const char *str, NTOPT_CALLBACK func, void *extobj)
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| 130 | {
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| 131 | int argc;
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| 132 | char argv[NTOPT_TEXT_MAXLEN];
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| 133 | char *argvp[1 + NTOPT_TEXT_MAXARGS];
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| 134 | int i;
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| 135 | int total;
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| 136 | char *p;
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| 137 |
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| 138 | argc = ntopt_get_count(str);
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| 139 | if (NTOPT_TEXT_MAXARGS <= argc) {
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| 140 | argc = NTOPT_TEXT_MAXARGS;
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| 141 | }
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| 142 |
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| 143 | memset(argvp, 0, sizeof(argvp));
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| 144 | total = 0;
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| 145 | p = &argv[0];
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| 146 | for (i = 0; i < argc; i++) {
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| 147 | int len;
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| 148 | argvp[i + 1] = ntopt_get_text(
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| 149 | str, i, p, NTOPT_TEXT_MAXLEN - total, &len);
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| 150 | if (total + len + 1 < NTOPT_TEXT_MAXLEN) {
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| 151 | p += len + 1;
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| 152 | total += len + 1;
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| 153 | }
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| 154 | else {
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| 155 | break;
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| 156 | }
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| 157 | }
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| 158 | argvp[0] = (char *)argc;
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| 159 |
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| 160 | return func((long *)&argvp[0], extobj);
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| 161 | }
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