From e0bc74ff013a3628b17911be624d17067259c07b Mon Sep 17 00:00:00 2001
From: Laurent Bercot <ska-skaware@skarnet.org>
Date: Tue, 29 Jun 2021 12:23:00 +0000
Subject:  cdb always mmaps

Signed-off-by: Laurent Bercot <ska@appnovation.com>
---
 src/libstddjb/cdb_init.c     | 23 +++++++++++++++++++++++
 src/libstddjb/cdb_init_map.c | 26 --------------------------
 src/libstddjb/cdb_read.c     | 14 ++------------
 3 files changed, 25 insertions(+), 38 deletions(-)
 create mode 100644 src/libstddjb/cdb_init.c
 delete mode 100644 src/libstddjb/cdb_init_map.c

(limited to 'src/libstddjb')

diff --git a/src/libstddjb/cdb_init.c b/src/libstddjb/cdb_init.c
new file mode 100644
index 0000000..2a1ffb3
--- /dev/null
+++ b/src/libstddjb/cdb_init.c
@@ -0,0 +1,23 @@
+/* ISC license. */
+
+#include <skalibs/bsdsnowflake.h>
+
+#include <sys/stat.h>
+#include <sys/mman.h>
+#include <stdint.h>
+#include <errno.h>
+
+#include <skalibs/cdb.h>
+
+int cdb_init (struct cdb *c, int fd)
+{
+  struct stat st ;
+  char *map ;
+  if (fstat(fd, &st) < 0) return -1 ;
+  if (st.st_size > UINT32_MAX) return (errno = EOVERFLOW, -1) ;
+  map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, -1) ;
+  if (map == MAP_FAILED) return -1 ;
+  c->map = map ;
+  c->size = st.st_size ;
+  return 0 ;
+}
diff --git a/src/libstddjb/cdb_init_map.c b/src/libstddjb/cdb_init_map.c
deleted file mode 100644
index 55fb02a..0000000
--- a/src/libstddjb/cdb_init_map.c
+++ /dev/null
@@ -1,26 +0,0 @@
-/* ISC license. */
-
-#include <skalibs/bsdsnowflake.h>
-#include <sys/stat.h>
-#include <sys/mman.h>
-#include <stdint.h>
-#include <errno.h>
-#include <skalibs/cdb.h>
-
-int cdb_init_map (struct cdb *c, int fd, int domap)
-{
-  if (domap)
-  {
-    struct stat st ;
-    char *map ;
-    if (fstat(fd, &st) < 0) return 0 ;
-    if (st.st_size > UINT32_MAX) return (errno = EOVERFLOW, 0) ;
-    map = mmap(0, st.st_size, PROT_READ, MAP_SHARED, fd, 0) ;
-    if (map == MAP_FAILED) return 0 ;
-    c->fd = -fd-2 ;
-    c->map = map ;
-    c->size = st.st_size ;
-  }
-  else c->fd = fd ;
-  return 1 ;
-}
diff --git a/src/libstddjb/cdb_read.c b/src/libstddjb/cdb_read.c
index 1d2f491..1fb15da 100644
--- a/src/libstddjb/cdb_read.c
+++ b/src/libstddjb/cdb_read.c
@@ -1,24 +1,14 @@
 /* ISC license. */
 
-#include <unistd.h>
 #include <string.h>
 #include <errno.h>
 
-#include <skalibs/allreadwrite.h>
 #include <skalibs/cdb.h>
 #include <skalibs/posixishard.h>
 
 int cdb_read (struct cdb *c, char *buf, unsigned int len, uint32_t pos)
 {
-  if (c->map)
-  {
-    if ((pos > c->size) || (c->size - pos < len)) return (errno = EPROTO, -1) ;
-    memcpy(buf, c->map + pos, len) ;
-  }
-  else
-  {
-    if (lseek(c->fd, pos, SEEK_SET) < 0) return -1 ;
-    if (allread(c->fd, buf, len) < len) return -1 ;
-  }
+  if ((pos > c->size) || (c->size - pos < len)) return (errno = EPROTO, -1) ;
+  memcpy(buf, c->map + pos, len) ;
   return 0 ;
 }
-- 
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