X-Git-Url: https://git.octo.it/?p=rrdtool.git;a=blobdiff_plain;f=src%2Frrd_open.c;h=19d28e90f3733e1504189633c27d37707679192b;hp=f345e28f71839e53ad16190db1c469fcfe6b52e6;hb=b02eace34f83a08c55830cb05bc55078153e2ba6;hpb=134ab7800aa5ee81007b7467a56e6f46a5017b85

diff --git a/src/rrd_open.c b/src/rrd_open.c
index f345e28..19d28e9 100644
--- a/src/rrd_open.c
+++ b/src/rrd_open.c
@@ -1,10 +1,27 @@
 /*****************************************************************************
- * RRDtool 1.1.x  Copyright Tobias Oetiker, 1997 - 2002
+ * RRDtool 1.2rc4  Copyright by Tobi Oetiker, 1997-2005
  *****************************************************************************
  * rrd_open.c  Open an RRD File
  *****************************************************************************
  * $Id$
  * $Log$
+ * Revision 1.10  2004/05/26 22:11:12  oetiker
+ * reduce compiler warnings. Many small fixes. -- Mike Slifcak <slif@bellsouth.net>
+ *
+ * Revision 1.9  2003/04/29 21:56:49  oetiker
+ * readline in rrd_open.c reads the file in 8 KB blocks, and calls realloc for
+ * each block. realloc is very slow in Mac OS X for huge blocks, e.g. when
+ * restoring databases from huge xml files. This patch finds the size of the
+ * file, and starts out with malloc'ing the full size.
+ * -- Peter Speck <speck@ruc.dk>
+ *
+ * Revision 1.8  2003/04/11 19:43:44  oetiker
+ * New special value COUNT which allows calculations based on the position of a
+ * value within a data set. Bug fix in rrd_rpncalc.c. PREV returned erroneus
+ * value for the second value. Bug fix in rrd_restore.c. Bug causing seek error
+ * when accesing an RRD restored from an xml that holds an RRD version <3.
+ * --  Ruben Justo <ruben@ainek.com>
+ *
  * Revision 1.7  2003/03/31 21:22:12  oetiker
  * enables RRDtool updates with microsecond or in case of windows millisecond
  * precision. This is needed to reduce time measurement error when archive step
@@ -52,7 +69,7 @@
 /* positioned to the first cdp in the first rra */
 
 int
-rrd_open(char *file_name, FILE **in_file, rrd_t *rrd, int rdwr)    
+rrd_open(const char *file_name, FILE **in_file, rrd_t *rrd, int rdwr)    
 {
 
     
@@ -61,13 +78,13 @@ rrd_open(char *file_name, FILE **in_file, rrd_t *rrd, int rdwr)
     
     rrd_init(rrd);
     if (rdwr == RRD_READONLY) {
-#ifndef WIN32
+#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
 	mode = "r";
 #else
 	mode = "rb";
 #endif
     } else {
-#ifndef WIN32
+#if defined(WIN32) && !defined(__CYGWIN__) && !defined(__CYGWIN32__)
 	mode = "r+";
 #else
 	mode = "rb+";
@@ -129,7 +146,8 @@ rrd_open(char *file_name, FILE **in_file, rrd_t *rrd, int rdwr)
 		fclose(*in_file); 
 		return (-1);
 	    }
-            fread(&rrd->live_head->last_up, sizeof(long), 1, *in_file); 
+		fread(&rrd->live_head->last_up, sizeof(long), 1, *in_file); 
+		rrd->live_head->last_up_usec = 0;
     }
     else {
 	    MYFREAD(rrd->live_head, live_head_t, 1)
@@ -175,8 +193,9 @@ void rrd_freemem(void *mem)
     if (mem) free(mem);
 }
 
-int readfile(char *file_name, char **buffer, int skipfirst){
+int readfile(const char *file_name, char **buffer, int skipfirst){
     long writecnt=0,totalcnt = MEMBLK;
+     long offset = 0;
     FILE *input=NULL;
     char c ;
     if ((strcmp("-",file_name) == 0)) { input = stdin; }
@@ -187,14 +206,22 @@ int readfile(char *file_name, char **buffer, int skipfirst){
       }
     }
     if (skipfirst){
-      do { c = getc(input); } while (c != '\n' && ! feof(input)); 
+      do { c = getc(input); offset++; } while (c != '\n' && ! feof(input));
+    }
+    if (strcmp("-",file_name)) {
+      fseek(input, 0, SEEK_END);
+      /* have extra space for detecting EOF without realloc */
+      totalcnt = (ftell(input) + 1) / sizeof(char) - offset;
+      if (totalcnt < MEMBLK)
+	totalcnt = MEMBLK; /* sanitize */
+      fseek(input, offset * sizeof(char), SEEK_SET);
     }
-    if (((*buffer) = (char *) malloc((MEMBLK+4)*sizeof(char))) == NULL) {
+    if (((*buffer) = (char *) malloc((totalcnt+4) * sizeof(char))) == NULL) {
 	perror("Allocate Buffer:");
 	exit(1);
     };
     do{
-      writecnt += fread((*buffer)+writecnt, 1, MEMBLK * sizeof(char) ,input);
+      writecnt += fread((*buffer)+writecnt, 1, (totalcnt - writecnt) * sizeof(char),input);
       if (writecnt >= totalcnt){
 	totalcnt += MEMBLK;
 	if (((*buffer)=rrd_realloc((*buffer), (totalcnt+4) * sizeof(char)))==NULL){