diff --git a/examples/CMakeLists.txt b/examples/CMakeLists.txt index b39ce312..1390ab13 100644 --- a/examples/CMakeLists.txt +++ b/examples/CMakeLists.txt @@ -18,7 +18,7 @@ else(APPLE) # Set boring names for executables add_executable(boing WIN32 boing.c) add_executable(gears WIN32 gears.c) - add_executable(heightmap WIN32 heightmap.c) + add_executable(heightmap WIN32 heightmap.c getopt.c) add_executable(splitview WIN32 splitview.c) add_executable(triangle WIN32 triangle.c) add_executable(wave WIN32 wave.c) diff --git a/examples/getopt.c b/examples/getopt.c new file mode 100644 index 00000000..b891b0a5 --- /dev/null +++ b/examples/getopt.c @@ -0,0 +1,253 @@ +/***************************************************************************** +* getopt.c - competent and free getopt library. +* $Header: /cvsroot/freegetopt/freegetopt/getopt.c,v 1.2 2003/10/26 03:10:20 vindaci Exp $ +* +* Copyright (c)2002-2003 Mark K. Kim +* All rights reserved. +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions +* are met: +* +* * Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* +* * 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. +* +* * Neither the original author of this software 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. +*/ +#include +#include +#include +#include "getopt.h" + + +/* 2009-10-12 Camilla Berglund + * + * Removed unused global static variable 'ID'. + */ + + +char* optarg = NULL; +int optind = 0; +int opterr = 1; +int optopt = '?'; + + +static char** prev_argv = NULL; /* Keep a copy of argv and argc to */ +static int prev_argc = 0; /* tell if getopt params change */ +static int argv_index = 0; /* Option we're checking */ +static int argv_index2 = 0; /* Option argument we're checking */ +static int opt_offset = 0; /* Index into compounded "-option" */ +static int dashdash = 0; /* True if "--" option reached */ +static int nonopt = 0; /* How many nonopts we've found */ + +static void increment_index() +{ + /* Move onto the next option */ + if(argv_index < argv_index2) + { + while(prev_argv[++argv_index] && prev_argv[argv_index][0] != '-' + && argv_index < argv_index2+1); + } + else argv_index++; + opt_offset = 1; +} + + +/* +* Permutes argv[] so that the argument currently being processed is moved +* to the end. +*/ +static int permute_argv_once() +{ + /* Movability check */ + if(argv_index + nonopt >= prev_argc) return 1; + /* Move the current option to the end, bring the others to front */ + else + { + char* tmp = prev_argv[argv_index]; + + /* Move the data */ + memmove(&prev_argv[argv_index], &prev_argv[argv_index+1], + sizeof(char**) * (prev_argc - argv_index - 1)); + prev_argv[prev_argc - 1] = tmp; + + nonopt++; + return 0; + } +} + + +int getopt(int argc, char** argv, char* optstr) +{ + int c = 0; + + /* If we have new argv, reinitialize */ + if(prev_argv != argv || prev_argc != argc) + { + /* Initialize variables */ + prev_argv = argv; + prev_argc = argc; + argv_index = 1; + argv_index2 = 1; + opt_offset = 1; + dashdash = 0; + nonopt = 0; + } + + /* Jump point in case we want to ignore the current argv_index */ + getopt_top: + + /* Misc. initializations */ + optarg = NULL; + + /* Dash-dash check */ + if(argv[argv_index] && !strcmp(argv[argv_index], "--")) + { + dashdash = 1; + increment_index(); + } + + /* If we're at the end of argv, that's it. */ + if(argv[argv_index] == NULL) + { + c = -1; + } + /* Are we looking at a string? Single dash is also a string */ + else if(dashdash || argv[argv_index][0] != '-' || !strcmp(argv[argv_index], "-")) + { + /* If we want a string... */ + if(optstr[0] == '-') + { + c = 1; + optarg = argv[argv_index]; + increment_index(); + } + /* If we really don't want it (we're in POSIX mode), we're done */ + else if(optstr[0] == '+' || getenv("POSIXLY_CORRECT")) + { + c = -1; + + /* Everything else is a non-opt argument */ + nonopt = argc - argv_index; + } + /* If we mildly don't want it, then move it back */ + else + { + if(!permute_argv_once()) goto getopt_top; + else c = -1; + } + } + /* Otherwise we're looking at an option */ + else + { + char* opt_ptr = NULL; + + /* Grab the option */ + c = argv[argv_index][opt_offset++]; + + /* Is the option in the optstr? */ + if(optstr[0] == '-') opt_ptr = strchr(optstr+1, c); + else opt_ptr = strchr(optstr, c); + /* Invalid argument */ + if(!opt_ptr) + { + if(opterr) + { + fprintf(stderr, "%s: invalid option -- %c\n", argv[0], c); + } + + optopt = c; + c = '?'; + + /* Move onto the next option */ + increment_index(); + } + /* Option takes argument */ + else if(opt_ptr[1] == ':') + { + /* ie, -oARGUMENT, -xxxoARGUMENT, etc. */ + if(argv[argv_index][opt_offset] != '\0') + { + optarg = &argv[argv_index][opt_offset]; + increment_index(); + } + /* ie, -o ARGUMENT (only if it's a required argument) */ + else if(opt_ptr[2] != ':') + { + /* One of those "you're not expected to understand this" moment */ + if(argv_index2 < argv_index) argv_index2 = argv_index; + while(argv[++argv_index2] && argv[argv_index2][0] == '-'); + optarg = argv[argv_index2]; + + /* Don't cross into the non-option argument list */ + if(argv_index2 + nonopt >= prev_argc) optarg = NULL; + + /* Move onto the next option */ + increment_index(); + } + else + { + /* Move onto the next option */ + increment_index(); + } + + /* In case we got no argument for an option with required argument */ + if(optarg == NULL && opt_ptr[2] != ':') + { + optopt = c; + c = '?'; + + if(opterr) + { + fprintf(stderr,"%s: option requires an argument -- %c\n", + argv[0], optopt); + } + } + } + /* Option does not take argument */ + else + { + /* Next argv_index */ + if(argv[argv_index][opt_offset] == '\0') + { + increment_index(); + } + } + } + + /* Calculate optind */ + if(c == -1) + { + optind = argc - nonopt; + } + else + { + optind = argv_index; + } + + return c; +} + + +/* vim:ts=3 +*/ diff --git a/examples/getopt.h b/examples/getopt.h new file mode 100644 index 00000000..0b78650a --- /dev/null +++ b/examples/getopt.h @@ -0,0 +1,63 @@ +/***************************************************************************** +* getopt.h - competent and free getopt library. +* $Header: /cvsroot/freegetopt/freegetopt/getopt.h,v 1.2 2003/10/26 03:10:20 vindaci Exp $ +* +* Copyright (c)2002-2003 Mark K. Kim +* All rights reserved. +* +* Redistribution and use in source and binary forms, with or without +* modification, are permitted provided that the following conditions +* are met: +* +* * Redistributions of source code must retain the above copyright +* notice, this list of conditions and the following disclaimer. +* +* * 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. +* +* * Neither the original author of this software 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. +*/ +#ifndef GETOPT_H_ +#define GETOPT_H_ + + +#ifdef __cplusplus +extern "C" { +#endif + + +extern char* optarg; +extern int optind; +extern int opterr; +extern int optopt; + +int getopt(int argc, char** argv, char* optstr); + + +#ifdef __cplusplus +} +#endif + + +#endif /* GETOPT_H_ */ + + +/* vim:ts=3 +*/