From b89f7c7b3baffa43fe5e13c9ba68bdf5b2dd5f39 Mon Sep 17 00:00:00 2001
From: Dustin Sallings <dustin@spy.net>
Date: Tue, 24 Mar 2009 10:05:25 -0700
Subject: Use stat macros for item stats.

---
 items.c     | 73 ++++++++++++++++++++-----------------------------------------
 memcached.h | 19 ++++++++++------
 2 files changed, 36 insertions(+), 56 deletions(-)

diff --git a/items.c b/items.c
index 63c5a1f..238fea9 100644
--- a/items.c
+++ b/items.c
@@ -374,72 +374,47 @@ char *do_item_cachedump(const unsigned int slabs_clsid, const unsigned int limit
 
 char *do_item_stats(uint32_t (*add_stats)(char *buf,
                     const char *key, const uint16_t klen, const char *val,
-                    const uint32_t vlen, void *cookie), void *c, int *bytes) {
-
-    size_t bufleft = (size_t) LARGEST_ID * 240;
-    char *buffer = malloc(bufleft);
-    char *bufcurr = buffer;
-    rel_time_t now = current_time;
+                    const uint32_t vlen, void *cookie), void *c, int *buflen) {
+    int allocated = LARGEST_ID * 240;
+    char *buf = malloc(allocated);
+    char *pos = buf;
     protocol_binary_response_header *header;
     int hdrsiz = sizeof(header->response);
-    int i, linelen = 0;
+    int i, size = 0;
 
-    if (buffer == NULL) {
-        *bytes = -1;
+    if (buf == NULL) {
+        *buflen = -1;
         return NULL;
     }
 
     for (i = 0; i < LARGEST_ID; i++) {
         if (tails[i] != NULL) {
-            char key[128];
-            char val[256];
-            uint32_t nbytes = 0;
-
-            sprintf(key, "items:%d:number", i);
-            sprintf(val, "%u", sizes[i]);
-            nbytes = add_stats(bufcurr, key, strlen(key), val, strlen(val), c);
-            linelen += nbytes;
-            bufcurr += nbytes;
-
-            sprintf(key, "items:%d:age", i);
-            sprintf(val, "%u", now - tails[i]->time);
-            nbytes = add_stats(bufcurr, key, strlen(key), val, strlen(val), c);
-            linelen += nbytes;
-            bufcurr += nbytes;
-
-            sprintf(key, "items:%d:evicted", i);
-            sprintf(val, "%u", itemstats[i].evicted);
-            nbytes = add_stats(bufcurr, key, strlen(key), val, strlen(val), c);
-            linelen += nbytes;
-            bufcurr += nbytes;
-
-            sprintf(key, "items:%d:evicted_time", i);
-            sprintf(val, "%u", itemstats[i].evicted_time);
-            nbytes = add_stats(bufcurr, key, strlen(key), val, strlen(val), c);
-            linelen += nbytes;
-            bufcurr += nbytes;
-
-            sprintf(key, "items:%d:outofmemory", i);
-            sprintf(val, "%u", itemstats[i].outofmemory);
-            nbytes = add_stats(bufcurr, key, strlen(key), val, strlen(val), c);
-            linelen += nbytes;
-            bufcurr += nbytes;
+            const char *fmt = "items:%d:%s";
+            char key_str[128];
+            char val_str[256];
+            int klen = 0, vlen = 0;
+
+            APPEND_NUM_FMT_STAT(fmt, i, "number", "%u", sizes[i]);
+            APPEND_NUM_FMT_STAT(fmt, i, "age", "%u", tails[i]->time);
+            APPEND_NUM_FMT_STAT(fmt, i, "evicted",
+                                "%u", itemstats[i].evicted);
+            APPEND_NUM_FMT_STAT(fmt, i, "evicted_time",
+                                "%u", itemstats[i].evicted_time);
+            APPEND_NUM_FMT_STAT(fmt, i, "outofmemory",
+                                "%u", itemstats[i].outofmemory);
 
             /* check whether binary protocol terminator will fit */
-            if (linelen + hdrsiz < bufleft) {
-                bufleft -= linelen;
-            } else {
-                free(buffer);
+            if (*buflen + hdrsiz > allocated) {
+                free(buf);
                 return NULL;
             }
         }
     }
 
     /* getting here means both ascii and binary terminators fit */
-    linelen += add_stats(bufcurr, NULL, 0, NULL, 0, c);
-    *bytes = linelen;
+    *buflen += add_stats(pos, NULL, 0, NULL, 0, c);
 
-    return buffer;
+    return buf;
 }
 
 /** dumps out a list of objects of each size, with granularity of 32 bytes */
diff --git a/memcached.h b/memcached.h
index 4f29420..84e36c7 100644
--- a/memcached.h
+++ b/memcached.h
@@ -193,15 +193,20 @@ typedef struct _stritem {
     pos += size;                                                 \
     assert(*buflen < allocated);
 
-/* Append a simple stat with a stat name, value format and value */
-#define APPEND_NUM_STAT(num, name, fmt, val)                \
-    klen = sprintf(key_str, "%d:%s", num, name);            \
-    vlen = sprintf(val_str, fmt, val);                      \
-    size = add_stats(pos, key_str, klen, val_str, vlen, c); \
-    *buflen += size;                                        \
-    pos += size;                                            \
+/* Append an indexed stat with a stat name (with format), value format
+   and value */
+#define APPEND_NUM_FMT_STAT(name_fmt, num, name, fmt, val)   \
+    klen = sprintf(key_str, name_fmt, num, name);            \
+    vlen = sprintf(val_str, fmt, val);                       \
+    size = add_stats(pos, key_str, klen, val_str, vlen, c);  \
+    *buflen += size;                                         \
+    pos += size;                                             \
     assert(*buflen < allocated);
 
+/* Common APPEND_NUM_FMT_STAT format. */
+#define APPEND_NUM_STAT(num, name, fmt, val) \
+    APPEND_NUM_FMT_STAT("%d:%s", num, name, fmt, val)
+
 /**
  * NOTE: If you modify this table you _MUST_ update the function state_text
  */
-- 
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