ckplot

commit 5bbd587cf75a40576c7a9c221743f3d0abe24e09
parent ed27ae4dcf7029d20ff0fd507a8a3460249990be
Author: aabacchus <ben@bvnf.space>
Date:   Sun,  3 Oct 2021 01:59:26 +0100

kplot: write axis labels onto graph if read from file

Diffstat:
M
Makefile
 | 
2
+-
M
kplot.c
 | 
20
+++++++++++++++++++-

2 files changed, 20 insertions(+), 2 deletions(-)
diff --git a/Makefile b/Makefile
@@ -1,6 +1,6 @@
 .POSIX:
 
-XCFLAGS = $(CFLAGS) -I/usr/local/include -I/usr/include/cairo -Wall -Wextra -Wpedantic
+XCFLAGS = $(CFLAGS) -I/usr/local/include -I/usr/include/cairo -Wall -Wextra -Wpedantic -D_XOPEN_SOURCE=600
 XLDFLAGS = $(LDFLAGS) -lkplot -L/usr/local/lib -lcsv -lcairo
 
 kplot: kplot.c
diff --git a/kplot.c b/kplot.c
@@ -3,6 +3,7 @@
 #include <cairo.h>
 #include <cairo-pdf.h>
 #include <csv.h>
+#include <errno.h>
 #include <kplot.h>
 #include <math.h>
 #include <string.h>
@@ -107,15 +108,32 @@ main(int argc, char **argv) {
         points1[i].x = c->data[i][0];
         points1[i].y = c->data[i][1];
     }
+
+    char *xlabel, *ylabel;
+    if (flag_H) {
+        xlabel = c->headers[0];
+        ylabel = c->headers[1];
+    }
     csv_destroy(c);
 
     struct kdata *d1;
     struct kplot *p;
+    struct kplotcfg kpcfg;
+    kplotcfg_defaults(&kpcfg);
+    if (flag_H) {
+        errno = 0;
+        kpcfg.xaxislabel = strdup(xlabel);
+        kpcfg.yaxislabel = strdup(ylabel);
+        if (errno != 0) {
+            perror("strdup");
+            return 1;
+        }
+    }
     cairo_surface_t *surf;
     cairo_t *cr;
 
     d1 = kdata_array_alloc(points1, rows);
-    p = kplot_alloc(NULL);
+    p = kplot_alloc(&kpcfg);
     kplot_attach_data(p, d1, KPLOT_POINTS, NULL);
     kdata_destroy(d1);
     if (output_type == OUT_PNG)