X-Git-Url: https://git.octo.it/?a=blobdiff_plain;f=src%2Futils_match.c;h=062bcfe37fd152851eb11eb03464daabe0b53ae2;hb=171d6a4bd5e05b56be83860701d35bfe1373d6a7;hp=d4ac05a2e3fb8edcc45da5ca24b33e89b39f7798;hpb=041745087dbd596265946cd8798368735561f199;p=collectd.git

diff --git a/src/utils_match.c b/src/utils_match.c
index d4ac05a2..062bcfe3 100644
--- a/src/utils_match.c
+++ b/src/utils_match.c
@@ -29,55 +29,180 @@
 #include <regex.h>
 
 #define UTILS_MATCH_FLAGS_FREE_USER_DATA 0x01
+#define UTILS_MATCH_FLAGS_EXCLUDE_REGEX 0x02
 
 struct cu_match_s
 {
   regex_t regex;
+  regex_t excluderegex;
   int flags;
 
-  int (*callback) (const char *str, void *user_data);
+  int (*callback) (const char *str, char * const *matches, size_t matches_num,
+      void *user_data);
   void *user_data;
 };
 
 /*
  * Private functions
  */
-static int default_callback (const char *str, void *user_data)
+static char *match_substr (const char *str, int begin, int end)
+{
+  char *ret;
+  size_t ret_len;
+
+  if ((begin < 0) || (end < 0) || (begin >= end))
+    return (NULL);
+  if ((size_t) end > (strlen (str) + 1))
+  {
+    ERROR ("utils_match: match_substr: `end' points after end of string.");
+    return (NULL);
+  }
+
+  ret_len = end - begin;
+  ret = (char *) malloc (sizeof (char) * (ret_len + 1));
+  if (ret == NULL)
+  {
+    ERROR ("utils_match: match_substr: malloc failed.");
+    return (NULL);
+  }
+
+  sstrncpy (ret, str + begin, ret_len + 1);
+  return (ret);
+} /* char *match_substr */
+
+static int default_callback (const char __attribute__((unused)) *str,
+    char * const *matches, size_t matches_num, void *user_data)
 {
   cu_match_value_t *data = (cu_match_value_t *) user_data;
 
-  if (data->ds_type == UTILS_MATCH_DS_TYPE_GAUGE)
+  if (data->ds_type & UTILS_MATCH_DS_TYPE_GAUGE)
   {
     gauge_t value;
     char *endptr = NULL;
 
-    value = strtod (str, &endptr);
-    if (str == endptr)
+    if (matches_num < 2)
       return (-1);
 
-    data->value.gauge = value;
+    value = (gauge_t) strtod (matches[1], &endptr);
+    if (matches[1] == endptr)
+      return (-1);
+
+    if ((data->values_num == 0)
+	|| (data->ds_type & UTILS_MATCH_CF_GAUGE_LAST))
+    {
+      data->value.gauge = value;
+    }
+    else if (data->ds_type & UTILS_MATCH_CF_GAUGE_AVERAGE)
+    {
+      double f = ((double) data->values_num)
+	/ ((double) (data->values_num + 1));
+      data->value.gauge = (data->value.gauge * f) + (value * (1.0 - f));
+    }
+    else if (data->ds_type & UTILS_MATCH_CF_GAUGE_MIN)
+    {
+      if (data->value.gauge > value)
+	data->value.gauge = value;
+    }
+    else if (data->ds_type & UTILS_MATCH_CF_GAUGE_MAX)
+    {
+      if (data->value.gauge < value)
+	data->value.gauge = value;
+    }
+    else
+    {
+      ERROR ("utils_match: default_callback: obj->ds_type is invalid!");
+      return (-1);
+    }
+
+    data->values_num++;
   }
-  else if ((data->ds_type == UTILS_MATCH_DS_TYPE_COUNTER_SET)
-      || (data->ds_type == UTILS_MATCH_DS_TYPE_COUNTER_ADD))
+  else if (data->ds_type & UTILS_MATCH_DS_TYPE_COUNTER)
   {
     counter_t value;
     char *endptr = NULL;
 
-    value = strtoll (str, &endptr, 0);
-    if (str == endptr)
+    if (data->ds_type & UTILS_MATCH_CF_COUNTER_INC)
+    {
+      data->value.counter++;
+      data->values_num++;
+      return (0);
+    }
+
+    if (matches_num < 2)
       return (-1);
 
-    if (data->ds_type == UTILS_MATCH_DS_TYPE_COUNTER_SET)
+    value = (counter_t) strtoull (matches[1], &endptr, 0);
+    if (matches[1] == endptr)
+      return (-1);
+
+    if (data->ds_type & UTILS_MATCH_CF_COUNTER_SET)
       data->value.counter = value;
-    else
+    else if (data->ds_type & UTILS_MATCH_CF_COUNTER_ADD)
       data->value.counter += value;
+    else
+    {
+      ERROR ("utils_match: default_callback: obj->ds_type is invalid!");
+      return (-1);
+    }
+
+    data->values_num++;
+  }
+  else if (data->ds_type & UTILS_MATCH_DS_TYPE_DERIVE)
+  {
+    derive_t value;
+    char *endptr = NULL;
+
+    if (data->ds_type & UTILS_MATCH_CF_DERIVE_INC)
+    {
+      data->value.counter++;
+      data->values_num++;
+      return (0);
+    }
+
+    if (matches_num < 2)
+      return (-1);
+
+    value = (derive_t) strtoll (matches[1], &endptr, 0);
+    if (matches[1] == endptr)
+      return (-1);
+
+    if (data->ds_type & UTILS_MATCH_CF_DERIVE_SET)
+      data->value.derive = value;
+    else if (data->ds_type & UTILS_MATCH_CF_DERIVE_ADD)
+      data->value.derive += value;
+    else
+    {
+      ERROR ("utils_match: default_callback: obj->ds_type is invalid!");
+      return (-1);
+    }
+
+    data->values_num++;
   }
-  else if (data->ds_type == UTILS_MATCH_DS_TYPE_COUNTER_INC)
+  else if (data->ds_type & UTILS_MATCH_DS_TYPE_ABSOLUTE)
   {
-    data->value.counter++;
+    absolute_t value;
+    char *endptr = NULL;
+
+    if (matches_num < 2)
+      return (-1);
+
+    value = (absolute_t) strtoull (matches[1], &endptr, 0);
+    if (matches[1] == endptr)
+      return (-1);
+
+    if (data->ds_type & UTILS_MATCH_CF_ABSOLUTE_SET)
+      data->value.absolute = value;
+    else
+    {
+      ERROR ("utils_match: default_callback: obj->ds_type is invalid!");
+      return (-1);
+    }
+
+    data->values_num++;
   }
   else
   {
+    ERROR ("utils_match: default_callback: obj->ds_type is invalid!");
     return (-1);
   }
 
@@ -87,19 +212,23 @@ static int default_callback (const char *str, void *user_data)
 /*
  * Public functions
  */
-cu_match_t *match_create_callback (const char *regex,
-		int (*callback) (const char *str, void *user_data),
+cu_match_t *match_create_callback (const char *regex, const char *excluderegex,
+		int (*callback) (const char *str,
+		  char * const *matches, size_t matches_num, void *user_data),
 		void *user_data)
 {
   cu_match_t *obj;
   int status;
 
+  DEBUG ("utils_match: match_create_callback: regex = %s, excluderegex = %s",
+	 regex, excluderegex);
+
   obj = (cu_match_t *) malloc (sizeof (cu_match_t));
   if (obj == NULL)
     return (NULL);
   memset (obj, '\0', sizeof (cu_match_t));
 
-  status = regcomp (&obj->regex, regex, REG_EXTENDED);
+  status = regcomp (&obj->regex, regex, REG_EXTENDED | REG_NEWLINE);
   if (status != 0)
   {
     ERROR ("Compiling the regular expression \"%s\" failed.", regex);
@@ -107,13 +236,26 @@ cu_match_t *match_create_callback (const char *regex,
     return (NULL);
   }
 
+  if (excluderegex && strcmp(excluderegex, "") != 0) {
+    status = regcomp (&obj->excluderegex, excluderegex, REG_EXTENDED);
+    if (status != 0)
+    {
+	ERROR ("Compiling the excluding regular expression \"%s\" failed.",
+	       excluderegex);
+	sfree (obj);
+	return (NULL);
+    }
+    obj->flags |= UTILS_MATCH_FLAGS_EXCLUDE_REGEX;
+  }
+
   obj->callback = callback;
   obj->user_data = user_data;
 
   return (obj);
 } /* cu_match_t *match_create_callback */
 
-cu_match_t *match_create_simple (const char *regex, int match_ds_type)
+cu_match_t *match_create_simple (const char *regex,
+				 const char *excluderegex, int match_ds_type)
 {
   cu_match_value_t *user_data;
   cu_match_t *obj;
@@ -124,7 +266,8 @@ cu_match_t *match_create_simple (const char *regex, int match_ds_type)
   memset (user_data, '\0', sizeof (cu_match_value_t));
   user_data->ds_type = match_ds_type;
 
-  obj = match_create_callback (regex, default_callback, user_data);
+  obj = match_create_callback (regex, excluderegex,
+			       default_callback, user_data);
   if (obj == NULL)
   {
     sfree (user_data);
@@ -152,47 +295,66 @@ void match_destroy (cu_match_t *obj)
 int match_apply (cu_match_t *obj, const char *str)
 {
   int status;
-  regmatch_t re_match[2];
-  char *sub_match;
-  size_t sub_match_len;
+  regmatch_t re_match[32];
+  char *matches[32];
+  size_t matches_num;
+  size_t i;
 
   if ((obj == NULL) || (str == NULL))
     return (-1);
 
-  re_match[0].rm_so = -1;
-  re_match[0].rm_eo = -1;
-  re_match[1].rm_so = -1;
-  re_match[1].rm_eo = -1;
-  status = regexec (&obj->regex, str, /* nmatch = */ 2, re_match,
+  if (obj->flags & UTILS_MATCH_FLAGS_EXCLUDE_REGEX) {
+    status = regexec (&obj->excluderegex, str,
+		      STATIC_ARRAY_SIZE (re_match), re_match,
+		      /* eflags = */ 0);
+    /* Regex did match, so exclude this line */
+    if (status == 0) {
+      DEBUG("ExludeRegex matched, don't count that line\n");
+      return (0);
+    }
+  }
+
+  status = regexec (&obj->regex, str,
+      STATIC_ARRAY_SIZE (re_match), re_match,
       /* eflags = */ 0);
 
   /* Regex did not match */
   if (status != 0)
     return (0);
 
-  /* re_match[0] is the location of the entire match.
-   * re_match[1] is the location of the sub-match. */
-  if (re_match[1].rm_so < 0)
+  memset (matches, '\0', sizeof (matches));
+  for (matches_num = 0; matches_num < STATIC_ARRAY_SIZE (matches); matches_num++)
   {
-    status = obj->callback (str, obj->user_data);
-    return (status);
+    if ((re_match[matches_num].rm_so < 0)
+	|| (re_match[matches_num].rm_eo < 0))
+      break;
+
+    matches[matches_num] = match_substr (str,
+	re_match[matches_num].rm_so, re_match[matches_num].rm_eo);
+    if (matches[matches_num] == NULL)
+    {
+      status = -1;
+      break;
+    }
   }
 
-  assert (re_match[1].rm_so < re_match[1].rm_eo);
-  sub_match_len = (size_t) (re_match[1].rm_eo - re_match[1].rm_so);
-  sub_match = (char *) malloc (sizeof (char) * (sub_match_len + 1));
-  if (sub_match == NULL)
+  if (status != 0)
   {
-    ERROR ("malloc failed.");
-    return (-1);
+    ERROR ("utils_match: match_apply: match_substr failed.");
+  }
+  else
+  {
+    status = obj->callback (str, matches, matches_num, obj->user_data);
+    if (status != 0)
+    {
+      ERROR ("utils_match: match_apply: callback failed.");
+    }
   }
-  sstrncpy (sub_match, str + re_match[1].rm_so, sub_match_len + 1);
-
-  DEBUG ("utils_match: match_apply: Dispatching substring \"%s\" to "
-      "callback.", sub_match);
-  status = obj->callback (sub_match, obj->user_data);
 
-  sfree (sub_match);
+  for (i = 0; i < matches_num; i++)
+  {
+    sfree (matches[i]);
+  }
 
   return (status);
 } /* int match_apply */