src/utils_search.[ch]: Add a module for parsing search strings.

diff --git a/src/Makefile.am b/src/Makefile.am
index f2ba322..6ef1f82 100644 (file)
--- a/src/Makefile.am
+++ b/src/Makefile.am
@@ -34,4 +34,5 @@ collection_fcgi_SOURCES = main.c \
                          graph_list.c graph_list.h \
                          rrd_args.c rrd_args.h \
                          utils_array.c utils_array.h \
-                         utils_cgi.c utils_cgi.h
+                         utils_cgi.c utils_cgi.h \
+                         utils_search.c utils_search.h

diff --git a/src/utils_search.c b/src/utils_search.c
new file mode 100644 (file)
index 0000000..cb01a41
--- /dev/null
+++ b/src/utils_search.c
@@ -0,0 +1,197 @@
+/**
+ * collection4 - utils_search.c
+ * Copyright (C) 2010  Florian octo Forster
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ *
+ * Authors:
+ *   Florian octo Forster <ff at octo.it>
+ **/
+
+#include <stdlib.h>
+#include <stdio.h>
+#include <string.h>
+#include <ctype.h>
+
+#include "utils_search.h"
+#include "utils_array.h"
+
+#include <fcgiapp.h>
+#include <fcgi_stdio.h>
+
+struct search_info_s
+{
+  char *host;
+  char *plugin;
+  char *plugin_instance;
+  char *type;
+  char *type_instance;
+
+  str_array_t *terms;
+};
+
+static char *read_quoted_string (const char **buffer) /* {{{ */
+{
+  const char *ptr = *buffer;
+  char *ret;
+  size_t ret_len;
+
+  if (ptr[0] != '"')
+    return (NULL);
+  ptr++;
+
+  ret_len = 0;
+  while ((*ptr != '"') && (*ptr != 0))
+  {
+    ret_len++;
+
+    if (*ptr == '\\')
+      ptr += 2;
+    else
+      ptr++;
+  }
+
+  if ((ret_len < 1) || (*ptr != '"'))
+    return (NULL);
+
+  ret = malloc (ret_len + 1);
+  if (ret == NULL)
+    return (NULL);
+
+  ptr = *buffer + 1;
+  ret_len = 0;
+  while ((*ptr != '"') && (*ptr != 0))
+  {
+    if (*ptr == '"')
+      break;
+
+    if (*ptr == '\\')
+      ptr++;
+
+    ret[ret_len] = *ptr;
+
+    ptr++;
+    ret_len++;
+  }
+
+  /* terminate string */
+  ret[ret_len] = 0;
+
+  /* "ptr" points to the '"' sign, so advance one more */
+  ptr++;
+  *buffer = ptr;
+
+  return (ret);
+} /* }}} char *read_quoted_string */
+
+static char *read_unquoted_word (const char **buffer) /* {{{ */
+{
+  const char *ptr = *buffer;
+  char *ret;
+  size_t ret_len;
+
+  ret_len = 0;
+  while (!isspace ((int) ptr[ret_len]) && (ptr[ret_len] != 0))
+    ret_len++;
+
+  if (ret_len < 1)
+    return (NULL);
+
+  ret = malloc (ret_len + 1);
+  if (ret == NULL)
+    return (NULL);
+
+  memcpy (ret, ptr, ret_len);
+  ret[ret_len] = 0;
+
+  ptr += ret_len;
+  *buffer = ptr;
+
+  return (ret);
+} /* }}} char *read_unquoted_word */
+
+static char *next_token (const char **buffer) /* {{{ */
+{
+  const char *ptr = *buffer;
+  char *ret;
+
+  while (isspace ((int) (*ptr)))
+    ptr++;
+
+  if (ptr[0] == 0)
+    return (NULL);
+  else if (ptr[0] == '"')
+  {
+    ret = read_quoted_string (&ptr);
+    if (ret != NULL)
+    {
+      *buffer = ptr;
+      return (ret);
+    }
+  }
+
+  ret = read_unquoted_word (&ptr);
+  if (ret != NULL)
+    *buffer = ptr;
+
+  return (ret);
+} /* }}} char *next_token */
+
+search_info_t *search_parse (const char *search) /* {{{ */
+{
+  const char *ptr;
+  char *token;
+  search_info_t *si;
+
+  si = malloc (sizeof (*si));
+  if (si == NULL)
+    return (NULL);
+  memset (si, 0, sizeof (*si));
+
+  si->terms = array_create ();
+  if (si->terms == NULL)
+  {
+    free (si);
+    return (NULL);
+  }
+
+  ptr = search;
+
+  while ((token = next_token (&ptr)) != NULL)
+  {
+    array_append (si->terms, token);
+
+    free (token);
+  }
+
+  return (si);
+} /* }}} search_info_t *search_parse */
+
+void search_destroy (search_info_t *si) /* {{{ */
+{
+  if (si == NULL)
+    return;
+
+  free (si->host);
+  free (si->plugin);
+  free (si->plugin_instance);
+  free (si->type);
+  free (si->type_instance);
+
+  array_destroy (si->terms);
+} /* }}} void search_destroy */
+
+/* vim: set sw=2 sts=2 et fdm=marker : */

diff --git a/src/utils_search.h b/src/utils_search.h
new file mode 100644 (file)
index 0000000..a1fa643
--- /dev/null
+++ b/src/utils_search.h
@@ -0,0 +1,35 @@
+/**
+ * collection4 - utils_search.h
+ * Copyright (C) 2010  Florian octo Forster
+ * 
+ * This program is free software; you can redistribute it and/or
+ * modify it under the terms of the GNU Lesser General Public
+ * License as published by the Free Software Foundation; either
+ * version 2.1 of the License, or (at your option) any later version.
+ * 
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the GNU
+ * Lesser General Public License for more details.
+ * 
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor,
+ * Boston, MA  02110-1301  USA
+ *
+ * Authors:
+ *   Florian octo Forster <ff at octo.it>
+ **/
+
+#ifndef UTILS_SEARCH_H
+#define UTILS_SEARCH_H 1
+
+struct search_info_s;
+typedef struct search_info_s search_info_t;
+
+search_info_t *search_parse (const char *search);
+void search_destroy (search_info_t *si);
+
+#endif /* UTILS_SEARCH_H */
+/* vim: set sw=2 sts=2 et fdm=marker : */
+