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Diffstat (limited to 'nuttx/libc/unistd/lib_getopt.c')
-rw-r--r-- | nuttx/libc/unistd/lib_getopt.c | 269 |
1 files changed, 0 insertions, 269 deletions
diff --git a/nuttx/libc/unistd/lib_getopt.c b/nuttx/libc/unistd/lib_getopt.c deleted file mode 100644 index 1a9190976..000000000 --- a/nuttx/libc/unistd/lib_getopt.c +++ /dev/null @@ -1,269 +0,0 @@ -/**************************************************************************** - * libc/unistd/lib_getopt.c - * - * Copyright (C) 2007-2009, 2011 Gregory Nutt. All rights reserved. - * Author: Gregory Nutt <gnutt@nuttx.org> - * - * Redistribution and use in source and binary forms, with or without - * modification, are permitted provided that the following conditions - * are met: - * - * 1. Redistributions of source code must retain the above copyright - * notice, this list of conditions and the following disclaimer. - * 2. Redistributions in binary form must reproduce the above copyright - * notice, this list of conditions and the following disclaimer in - * the documentation and/or other materials provided with the - * distribution. - * 3. Neither the name NuttX nor the names of its contributors may be - * used to endorse or promote products derived from this software - * without specific prior written permission. - * - * THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDERS AND CONTRIBUTORS - * "AS IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT - * LIMITED TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS - * FOR A PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE - * COPYRIGHT OWNER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, - * INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, - * BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS - * OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED - * AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT - * LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN - * ANY WAY OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE - * POSSIBILITY OF SUCH DAMAGE. - * - ****************************************************************************/ - -/**************************************************************************** - * Included Files - ****************************************************************************/ - -#include <nuttx/config.h> - -#include <stdbool.h> -#include <unistd.h> -#include <string.h> - -/**************************************************************************** - * Pre-processor Definitions - ****************************************************************************/ - -/**************************************************************************** - * Global Variables - ****************************************************************************/ - -FAR char *optarg; /* Optional argument following option */ -int optind = 1; /* Index into argv */ -int optopt = '?'; /* unrecognized option character */ - -/**************************************************************************** - * Private Variables - ****************************************************************************/ - -static FAR char *g_optptr = NULL; -static bool g_binitialized = false; - -/**************************************************************************** - * Global Functions - ****************************************************************************/ - -/**************************************************************************** - * Name: getopt - * - * Description: getopt() parses command-line arguments. Its arguments argc - * and argv are the argument count and array as passed to the main() - * function on program invocation. An element of argv that starts with - * '-' is an option element. The characters of this element (aside from - * the initial '-') are option characters. If getopt() is called repeatedly, - * it returns successively each of the option characters from each of the - * option elements. - * - * If getopt() finds another option character, it returns that character, - * updating the external variable optind and a static variable nextchar so - * that the next call to getopt() can resume the scan with the following - * option character or argv-element. - * - * If there are no more option characters, getopt() returns -1. Then optind - * is the index in argv of the first argv-element that is not an option. - * - * The 'optstring' argument is a string containing the legitimate option - * characters. If such a character is followed by a colon, this indicates - * that the option requires an argument. If an argument is required for an - * option so getopt() places a pointer to the following text in the same - * argv-element, or the text of the following argv-element, in optarg. - * - * NOTES: - * 1. opterr is not supported and this implementation of getopt() never - * printfs error messages. - * 2. getopt is NOT threadsafe! - * 3. This version of getopt() does not reset global variables until - * -1 is returned. As a result, your command line parsing loops - * must call getopt() repeatedly and continue to parse if other - * errors are returned ('?' or ':') until getopt() finally returns -1. - * (You can also set optind to -1 to force a reset). - * - * Return: If an option was successfully found, then getopt() returns the - * option character. If all command-line options have been parsed, then - * getopt() returns -1. If getopt() encounters an option character that - * was not in optstring, then '?' is returned. If getopt() encounters an - * option with a missing argument, then the return value depends on the - * first character in optstring: if it is ':', then ':' is returned; - * otherwise '?' is returned. - * - ****************************************************************************/ - -int getopt(int argc, FAR char *const argv[], FAR const char *optstring) -{ - if (argv && optstring && argc > 1) - { - int noarg_ret = '?'; - char *optchar; - - /* The inital value of optind is 1. If getopt() is called again in the - * program, optind must be reset to some value <= 1. - */ - - if (optind < 1 || !g_binitialized) - { - optind = 1; /* Skip over the program name */ - g_optptr = NULL; /* Start at the beginning of the first argument */ - g_binitialized = true; /* Now we are initialized */ - } - - /* If the first character of opstring s ':', then ':' is in the event of - * a missing argument. Otherwise '?' is returned. - */ - - if (*optstring == ':') - { - noarg_ret = ':'; - optstring++; - } - - /* Are we resuming in the middle, or at the end of a string of arguments? - * g_optptr == NULL means that we are started at the beginning of argv[optind]; - * *g_optptr == \0 means that we are starting at the beginning of optind+1 - */ - - while (!g_optptr || !*g_optptr) - { - /* We need to start at the beginning of the next argv. Check if we need - * to increment optind - */ - - if (g_optptr) - { - /* Yes.. Increment it and check for the case where where we have - * processed everything in the argv[] array. - */ - - optind++; - } - - /* Check for the end of the argument list */ - - g_optptr = argv[optind]; - if (!g_optptr) - { - /* There are no more arguments, we are finished */ - - g_binitialized = false; - return ERROR; - } - - /* We are starting at the beginning of argv[optind]. In this case, the - * first character must be '-' - */ - - if (*g_optptr != '-') - { - /* The argument does not start with '-', we are finished */ - - g_binitialized = false; - return ERROR; - } - - /* Skip over the '-' */ - - g_optptr++; - } - - /* Special case handling of "-" and "-:" */ - - if (!*g_optptr) - { - optopt = '\0'; /* We'll fix up g_optptr the next time we are called */ - return '?'; - } - - /* Handle the case of "-:" */ - - if (*g_optptr == ':') - { - optopt = ':'; - g_optptr++; - return '?'; - } - - /* g_optptr now points at the next option and it is not something crazy. - * check if the option is in the list of valid options. - */ - - optchar = strchr(optstring, *g_optptr); - if (!optchar) - { - /* No this character is not in the list of valid options */ - - optopt = *g_optptr; - g_optptr++; - return '?'; - } - - /* Yes, the character is in the list of valid options. Does it have an - * required argument? - */ - - if (optchar[1] != ':') - { - /* No, no arguments. Just return the character that we found */ - - g_optptr++; - return *optchar; - } - - /* Yes, it has a required argument. Is the required argument - * immediately after the command in this same argument? - */ - - if (g_optptr[1] != '\0') - { - /* Yes, return a pointer into the current argument */ - - optarg = &g_optptr[1]; - optind++; - g_optptr = NULL; - return *optchar; - } - - /* No.. is the optional argument the next argument in argv[] ? */ - - if (argv[optind+1] && *argv[optind+1] != '-') - { - /* Yes.. return that */ - - optarg = argv[optind+1]; - optind += 2; - g_optptr = NULL; - return *optchar; - } - - /* No argument was supplied */ - - optarg = NULL; - optopt = *optchar; - optind++; - return noarg_ret; - } - - g_binitialized = false; - return ERROR; -} |