src/platforms/common: move to platforms/common

Script to update include paths:
for i in $(grep -rl 'include <px4_work_queue' src platforms); do sed -i 's/#include <px4_work_queue/#include <px4_platform_common\/px4_work_queue/' $i; done

platforms/common/px4_getopt.c

@@ -0,0 +1,187 @@
+/****************************************************************************
+ *
+ * Copyright (c) 2015 Mark Charlebois. All rights reserved.
+ *
+ * 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 PX4 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.
+ *
+ ****************************************************************************/
+
+/**
+ * @file px4_getopt.cpp
+ * Minimal, thread safe version of getopt
+ */
+
+#include <px4_getopt.h>
+#include <stdio.h>
+
+// check if p is a valid option and if the option takes an arg
+static char isvalidopt(char p, const char *options, int *takesarg)
+{
+	int idx = 0;
+	*takesarg = 0;
+
+	while (options[idx] != 0 && p != options[idx]) {
+		++idx;
+	}
+
+	if (options[idx] == 0) {
+		return '?';
+	}
+
+	if (options[idx + 1] == ':') {
+		*takesarg = 1;
+	}
+
+	return options[idx];
+}
+
+// reorder argv and put non-options at the end
+static int reorder(int argc, char **argv, const char *options)
+{
+	char *tmp_argv[argc];
+	char c;
+	int idx = 1;
+	int tmpidx = 1;
+	int takesarg;
+
+	// move the options to the front
+	while (idx < argc && argv[idx] != 0) {
+		if (argv[idx][0] == '-') {
+			c = isvalidopt(argv[idx][1], options, &takesarg);
+
+			if (c == '?') {
+				return 1;
+			}
+
+			tmp_argv[tmpidx] = argv[idx];
+			tmpidx++;
+
+			if (takesarg) {
+				if (idx + 1 >= argc) { //Error: option takes an argument, but there is no more argument
+					return 1;
+				}
+
+				tmp_argv[tmpidx] = argv[idx + 1];
+				// printf("tmp_argv[%d] = %s\n", tmpidx, tmp_argv[tmpidx]);
+				tmpidx++;
+				idx++;
+			}
+		}
+
+		idx++;
+	}
+
+	// Add non-options to the end
+	idx = 1;
+
+	while (idx < argc && argv[idx] != 0) {
+		if (argv[idx][0] == '-') {
+			c = isvalidopt(argv[idx][1], options, &takesarg);
+
+			if (c == '?') {
+				return c;
+			}
+
+			if (takesarg) {
+				idx++;
+			}
+
+		} else {
+			tmp_argv[tmpidx] = argv[idx];
+			tmpidx++;
+		}
+
+		idx++;
+	}
+
+	// Reorder argv
+	for (idx = 1; idx < argc; idx++) {
+		argv[idx] = tmp_argv[idx];
+	}
+
+	return 0;
+}
+
+//
+// px4_getopt
+//
+// returns:
+//            the valid option character
+//            '?' if any option is unknown
+//            -1 if no remaining options
+//
+// If the option takes an arg, myoptarg will be updated accordingly.
+// After each call to px4_getopt, myoptind in incremented to the next
+// unparsed arg index.
+// Argv is changed to put all options and option args at the beginning,
+// followed by non-options.
+//
+__EXPORT int px4_getopt(int argc, char *argv[], const char *options, int *myoptind, const char **myoptarg)
+{
+	char *p;
+	char c;
+	int takesarg;
+
+	if (*myoptind == 1) {
+		if (reorder(argc, argv, options) != 0) {
+			*myoptind += 1;
+			return (int)'?';
+		}
+	}
+
+	p = argv[*myoptind];
+
+	if (*myoptarg == 0) {
+		*myoptarg = argv[*myoptind];
+	}
+
+	if (p && options && myoptind && p[0] == '-') {
+		c = isvalidopt(p[1], options, &takesarg);
+
+		if (c == '?') {
+			*myoptind += 1;
+			return (int)c;
+		}
+
+		*myoptind += 1;
+
+		if (takesarg) {
+			*myoptarg = argv[*myoptind];
+
+			if (!*myoptarg) { //Error: option takes an argument, but there is no more argument
+				return -1;
+			}
+
+			*myoptind += 1;
+		}
+
+		return (int)c;
+	}
+
+	return -1;
+}