+/**
+ * collectd - src/utils_parse_option.c
+ * Copyright (C) 2008 Florian Forster
+ *
+ * Permission is hereby granted, free of charge, to any person obtaining a
+ * copy of this software and associated documentation files (the "Software"),
+ * to deal in the Software without restriction, including without limitation
+ * the rights to use, copy, modify, merge, publish, distribute, sublicense,
+ * and/or sell copies of the Software, and to permit persons to whom the
+ * Software is furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
+ * IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
+ * FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
+ * AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER
+ * LIABILITY, WHETHER IN AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING
+ * FROM, OUT OF OR IN CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER
+ * DEALINGS IN THE SOFTWARE.
+ *
+ * Authors:
+ * Florian octo Forster <octo at collectd.org>
+ **/
+
+#include "collectd.h"
+#include "common.h"
+#include "plugin.h"
+#include "utils_parse_option.h"
+
+int parse_string (char **ret_buffer, char **ret_string)
+{
+ char *buffer;
+ char *string;
+
+ buffer = *ret_buffer;
+
+ /* Eat up leading spaces. */
+ string = buffer;
+ while (isspace ((int) *string))
+ string++;
+ if (*string == 0)
+ return (1);
+
+ /* A quoted string */
+ if (*string == '"')
+ {
+ char *dst;
+
+ string++;
+ if (*string == 0)
+ return (1);
+
+ dst = string;
+ buffer = string;
+ while ((*buffer != '"') && (*buffer != 0))
+ {
+ /* Un-escape backslashes */
+ if (*buffer == '\\')
+ {
+ buffer++;
+ /* Catch a backslash at the end of buffer */
+ if (*buffer == 0)
+ return (-1);
+ }
+ *dst = *buffer;
+ buffer++;
+ dst++;
+ }
+ /* No quote sign has been found */
+ if (*buffer == 0)
+ return (-1);
+
+ *dst = 0;
+ dst++;
+ *buffer = 0;
+ buffer++;
+
+ /* Check for trailing spaces. */
+ if ((*buffer != 0) && !isspace ((int) *buffer))
+ return (-1);
+ }
+ else /* an unquoted string */
+ {
+ buffer = string;
+ while ((*buffer != 0) && !isspace ((int) *buffer))
+ buffer++;
+ if (*buffer != 0)
+ {
+ *buffer = 0;
+ buffer++;
+ }
+ }
+
+ /* Eat up trailing spaces */
+ while (isspace ((int) *buffer))
+ buffer++;
+
+ *ret_buffer = buffer;
+ *ret_string = string;
+
+ return (0);
+} /* int parse_string */
+
+/*
+ * parse_option
+ * ------------
+ * Parses an ``option'' as used with the unixsock and exec commands. An
+ * option is of the form:
+ * name0="value"
+ * name1="value with \"quotes\""
+ * name2="value \\ backslash"
+ * However, if the value does *not* contain a space character, you can skip
+ * the quotes.
+ */
+int parse_option (char **ret_buffer, char **ret_key, char **ret_value)
+{
+ char *buffer;
+ char *key;
+ char *value;
+ int status;
+
+ buffer = *ret_buffer;
+
+ /* Eat up leading spaces */
+ key = buffer;
+ while (isspace ((int) *key))
+ key++;
+ if (*key == 0)
+ return (1);
+
+ /* Look for the equal sign */
+ buffer = key;
+ while (isalnum ((int) *buffer) || *buffer == '_' || *buffer == ':')
+ buffer++;
+ if ((*buffer != '=') || (buffer == key))
+ return (1);
+ *buffer = 0;
+ buffer++;
+ /* Empty values must be written as "" */
+ if (isspace ((int) *buffer) || (*buffer == 0))
+ return (-1);
+
+ status = parse_string (&buffer, &value);
+ if (status != 0)
+ return (-1);
+
+ /* NB: parse_string will have eaten up all trailing spaces. */
+
+ *ret_buffer = buffer;
+ *ret_key = key;
+ *ret_value = value;
+
+ return (0);
+} /* int parse_option */
+
+/* vim: set sw=2 ts=8 tw=78 et : */