Added freegetopt to examples directory.

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)

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 <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include "getopt.h"
+
+
+/* 2009-10-12 Camilla Berglund <elmindreda@elmindreda.org>
+ *
+ * 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
+*/

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
+*/