157 lines
4.4 KiB
C
157 lines
4.4 KiB
C
/**
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* @file ntopt.c
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* @author CuBeatSystems
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* @author Shinichiro Nakamura
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* @copyright
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* ===============================================================
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* Natural Tiny Shell (NT-Shell) Version 0.3.1
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* ===============================================================
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* Copyright (c) 2010-2016 Shinichiro Nakamura
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*
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* Permission is hereby granted, free of charge, to any person
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* obtaining a copy of this software and associated documentation
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* files (the "Software"), to deal in the Software without
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* restriction, including without limitation the rights to use,
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* copy, modify, merge, publish, distribute, sublicense, and/or
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* sell copies of the Software, and to permit persons to whom the
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* Software is furnished to do so, subject to the following
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* conditions:
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*
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* The above copyright notice and this permission notice shall be
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* included in 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,
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* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES
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* OF MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
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* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT
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* HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY,
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* WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
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* FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR
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* OTHER DEALINGS IN THE SOFTWARE.
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*/
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#include "ntopt.h"
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/**
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* @brief Is the character delimiter?
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* @param c The character.
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* @retval true It's a delimiter.
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* @retval false It's not a delimiter.
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*/
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#define IS_DELIM(c) \
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(((c) == '\r') || ((c) == '\n') || ((c) == '\t') || ((c) == '\0') || ((c) == ' '))
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static int ntopt_get_count(const char *str);
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static char *ntopt_get_text(
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const char *str, const int n, char *buf, int siz, int *len);
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/**
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* @brief Get the sentence count of the given text string.
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* @param str A text string.
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* @return Count of the given sentence.
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*/
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static int ntopt_get_count(const char *str)
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{
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int cnt = 0;
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int wc = 0;
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char *p = (char *)str;
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while (*p) {
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if (!IS_DELIM(*p)) {
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wc++;
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if (wc == 1) {
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cnt++;
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}
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} else {
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wc = 0;
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}
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p++;
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}
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return cnt;
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}
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/**
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* @brief Get the sentence of the given text string.
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* @param str A text string.
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* @param n Index number. (0 to ntopt-get_count(str) - 1)
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* @param buf The pointer to a stored buffer.
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* @param siz The size of the stored buffer.
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* @param len The stored string length.
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* @retval !NULL Success. The pointer to the buffer.
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* @retval NULL Failure.
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*/
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static char *ntopt_get_text(
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const char *str, const int n, char *buf, int siz, int *len)
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{
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int cnt = 0;
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int wc = 0;
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char *p = (char *)str;
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*len = 0;
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while (*p) {
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if (!IS_DELIM(*p)) {
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wc++;
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if (wc == 1) {
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if (cnt == n) {
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char *des = buf;
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int cc = 0;
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while (!IS_DELIM(*p)) {
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cc++;
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if (siz <= cc) {
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break;
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}
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*des = *p;
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des++;
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p++;
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}
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*des = '\0';
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*len = cc;
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return buf;
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}
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cnt++;
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}
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} else {
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wc = 0;
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}
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p++;
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}
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return (char *)0;
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}
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/**
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* @brief Parse the given text string.
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* @param str A text string.
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* @param func The callback function.
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* @param extobj An external object for the callback function.
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* @return The return value from the callback.
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*/
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int ntopt_parse(const char *str, NTOPT_CALLBACK func, void *extobj)
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{
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int argc;
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char argv[NTOPT_TEXT_MAXLEN];
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char *argvp[NTOPT_TEXT_MAXARGS];
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int i;
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int total;
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char *p;
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argc = ntopt_get_count(str);
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if (NTOPT_TEXT_MAXARGS <= argc) {
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argc = NTOPT_TEXT_MAXARGS;
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}
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total = 0;
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p = &argv[0];
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for (i = 0; i < argc; i++) {
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int len;
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argvp[i] = ntopt_get_text(
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str, i, p, NTOPT_TEXT_MAXLEN - total, &len);
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if (total + len + 1 < NTOPT_TEXT_MAXLEN) {
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p += len + 1;
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total += len + 1;
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} else {
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break;
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}
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}
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return func(argc, &argvp[0], extobj);
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}
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