From 375995188dfc9e69f3884e8d4631809d137cc5e8 Mon Sep 17 00:00:00 2001
From: oetiker <oetiker@a5681a0c-68f1-0310-ab6d-d61299d08faa>
Date: Sun, 13 Feb 2005 16:13:33 +0000
Subject: [PATCH] let rrd_graph return the actual value range it picked ... --
 Henrik Stoerner <henrik@hswn.dk>

git-svn-id: svn://svn.oetiker.ch/rrdtool/trunk/program@297 a5681a0c-68f1-0310-ab6d-d61299d08faa
---
 CONTRIBUTORS                 | 1 +
 bindings/perl-shared/RRDs.xs | 3 ++-
 bindings/tcl/tclrrd.c        | 3 ++-
 src/rrd.h                    | 6 +++++-
 src/rrd_cgi.c                | 3 ++-
 src/rrd_graph.c              | 4 +++-
 src/rrd_graph.h              | 2 +-
 src/rrd_tool.c               | 3 ++-
 8 files changed, 18 insertions(+), 7 deletions(-)

diff --git a/CONTRIBUTORS b/CONTRIBUTORS
index 717ff1f..dc2974b 100644
--- a/CONTRIBUTORS
+++ b/CONTRIBUTORS
@@ -61,6 +61,7 @@ Debugging and code contributions
 	Mike Slifcak <slif@bellsouth.net> many rrdtool-1.1.x fixes
 	Peter Speck <speck@vitality.dk> eps/svg/pdf file format code in rrdtool-1.x
 	David Grimes <dgrimes@navisite.com> SQRT/SORT/REV/SHIFT/TREND
+	Henrik Storner <henrik@hswn.dk> make rrd_graph() provide the min/max values of data in graph
 
 Documentation
 
diff --git a/bindings/perl-shared/RRDs.xs b/bindings/perl-shared/RRDs.xs
index 28a6bde..558bdc0 100644
--- a/bindings/perl-shared/RRDs.xs
+++ b/bindings/perl-shared/RRDs.xs
@@ -178,6 +178,7 @@ rrd_graph(...)
 	PREINIT:
 	char **calcpr=NULL;
 	int i,xsize,ysize;
+	double ymin,ymax;
 	char **argv;
 	AV *retar;
 	PPCODE:
@@ -193,7 +194,7 @@ rrd_graph(...)
  	        }
 		optind=0; opterr=0; 
 		rrd_clear_error();
-		rrd_graph(items+1,argv,&calcpr,&xsize,&ysize,NULL); 
+		rrd_graph(items+1,argv,&calcpr,&xsize,&ysize,NULL,&ymin,&ymax); 
 		for (i=0; i < items; i++) {
 		    free(argv[i+1]);
 		}
diff --git a/bindings/tcl/tclrrd.c b/bindings/tcl/tclrrd.c
index 2a2fb41..3cc1711 100644
--- a/bindings/tcl/tclrrd.c
+++ b/bindings/tcl/tclrrd.c
@@ -217,13 +217,14 @@ Rrd_Graph(clientData, interp, argc, argv)
 {
     char **calcpr;
     int xsize, ysize;
+    double ymin, ymax;
     Tcl_Obj *listPtr;
     char **argv2;
     
     calcpr = NULL;
 
     argv2 = getopt_init(argc, argv);
-    if (rrd_graph(argc, argv2, &calcpr, &xsize, &ysize) != -1 ) {
+    if (rrd_graph(argc, argv2, &calcpr, &xsize, &ysize, NULL, &ymin, &ymax) != -1 ) {
         listPtr = Tcl_GetObjResult(interp);
         Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewIntObj(xsize));
         Tcl_ListObjAppendElement(interp, listPtr, Tcl_NewIntObj(ysize));
diff --git a/src/rrd.h b/src/rrd.h
index 7509540..f63d117 100644
--- a/src/rrd.h
+++ b/src/rrd.h
@@ -5,6 +5,10 @@
  *****************************************************************************
  * $Id$
  * $Log$
+ * Revision 1.9  2005/02/13 16:13:33  oetiker
+ * let rrd_graph return the actual value range it picked ...
+ * -- Henrik Stoerner <henrik@hswn.dk>
+ *
  * Revision 1.8  2004/05/26 22:11:12  oetiker
  * reduce compiler warnings. Many small fixes. -- Mike Slifcak <slif@bellsouth.net>
  *
@@ -59,7 +63,7 @@ typedef double       rrd_value_t;         /* the data storage type is
 /* main function blocks */
 int    rrd_create(int, char **);
 int    rrd_update(int, char **);
-int    rrd_graph(int, char **, char ***, int *, int *, FILE *);
+int    rrd_graph(int, char **, char ***, int *, int *, FILE *, double *, double *);
 int    rrd_fetch(int, char **, time_t *, time_t *, unsigned long *,
 		 unsigned long *, char ***, rrd_value_t **);
 int    rrd_restore(int, char **);
diff --git a/src/rrd_cgi.c b/src/rrd_cgi.c
index 411b02b..610413f 100644
--- a/src/rrd_cgi.c
+++ b/src/rrd_cgi.c
@@ -688,6 +688,7 @@ char* cgiget(long argc, const char **args){
 
 char* drawgraph(long argc, char **args){
   int i,xsize, ysize;
+  double ymin,ymax;
   for(i=0;i<argc;i++)
     if(strcmp(args[i],"--imginfo")==0 || strcmp(args[i],"-g")==0) break;
   if(i==argc) {
@@ -697,7 +698,7 @@ char* drawgraph(long argc, char **args){
   optind=0; /* reset gnu getopt */
   opterr=0; /* reset gnu getopt */
   calfree();
-  if( rrd_graph(argc+1, args-1, &calcpr, &xsize, &ysize,NULL) != -1 ) {
+  if( rrd_graph(argc+1, args-1, &calcpr, &xsize, &ysize,NULL,&ymin,&ymax) != -1 ) {
     return stralloc(calcpr[0]);
   } else {
     if (rrd_test_error()) {
diff --git a/src/rrd_graph.c b/src/rrd_graph.c
index 85984b3..3ac3623 100644
--- a/src/rrd_graph.c
+++ b/src/rrd_graph.c
@@ -2635,7 +2635,7 @@ scan_for_col(char *input, int len, char *output)
 ** - script parsing   now in rrd_graph_script()
 */
 int 
-rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream)
+rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *stream, double *ymin, double *ymax)
 {
     image_desc_t   im;
             
@@ -2676,6 +2676,8 @@ rrd_graph(int argc, char **argv, char ***prdata, int *xsize, int *ysize, FILE *s
 
     *xsize=im.ximg;
     *ysize=im.yimg;
+    *ymin=im.minval;
+    *ymax=im.maxval;
     if (im.imginfo) {
 	char *filename;
 	if (!(*prdata)) {
diff --git a/src/rrd_graph.h b/src/rrd_graph.h
index 181474c..d67f135 100644
--- a/src/rrd_graph.h
+++ b/src/rrd_graph.h
@@ -219,7 +219,7 @@ int graph_paint(image_desc_t *, char ***);
 void pie_part(image_desc_t *, gfx_color_t, double, double, double, double, double);
 int gdes_alloc(image_desc_t *);
 int scan_for_col(char *, int, char *);
-int rrd_graph(int, char **, char ***, int *, int *, FILE *);
+int rrd_graph(int, char **, char ***, int *, int *, FILE *, double *, double *);
 void rrd_graph_init(image_desc_t *);
 void rrd_graph_options(int, char **, image_desc_t *);
 void rrd_graph_script(int, char **, image_desc_t *, int);
diff --git a/src/rrd_tool.c b/src/rrd_tool.c
index fce0925..94c2b15 100644
--- a/src/rrd_tool.c
+++ b/src/rrd_tool.c
@@ -623,9 +623,10 @@ int HandleInputLine(int argc, char **argv, FILE* out)
 	const char *imgfile = argv[2]; /* rrd_graph changes argv pointer */
 #endif
 	int xsize, ysize;
+	double ymin,ymax;
 	int i;
 	int tostdout = (strcmp(argv[2],"-") == 0);	
-	if( rrd_graph(argc-1, &argv[1], &calcpr, &xsize, &ysize, NULL) != -1 ) {
+	if( rrd_graph(argc-1, &argv[1], &calcpr, &xsize, &ysize, NULL, &ymin, &ymax) != -1 ) {
 	    if (!tostdout) 
 		printf ("%dx%d\n",xsize,ysize);
 	    if (calcpr) {
-- 
2.30.2