1 files changed, 63 insertions, 0 deletions

diff --git a/trace-plot.c b/trace-plot.c
new file mode 100644
index 0000000..35d3352
--- /dev/null
+++ b/trace-plot.c
@@ -0,0 +1,63 @@
+#include <string.h>
+#include "trace-graph.h"
+
+void trace_graph_plot_free(struct graph_info *ginfo)
+{
+        struct graph_plot *plot;
+
+        while (ginfo->plot_list) {
+                plot = ginfo->plot_list;
+                ginfo->plot_list = plot->next;
+                free(plot);
+        }
+
+        if (ginfo->plot_array) {
+                free(ginfo->plot_array);
+                ginfo->plot_array = NULL;
+        };
+
+        ginfo->plots = 0;
+}
+
+void trace_graph_plot_init(struct graph_info *ginfo)
+{
+        ginfo->plots = 0;
+        ginfo->plot_array = NULL;
+        ginfo->plot_list = NULL;
+}
+
+void trace_graph_plot_append(struct graph_info *ginfo,
+                             const char *label, struct plot_callbacks *cb)
+{
+        struct graph_plot *plot;
+        char *name;
+
+        name = strdup(label);
+        if (!name)
+                die("Unable to allocate label");
+
+        plot = malloc_or_die(sizeof(*plot));
+        memset(plot, 0, sizeof(*plot));
+
+        plot->label = name;
+        plot->cb = cb;
+
+        plot->next = ginfo->plot_list;
+        ginfo->plot_list = plot;
+
+        if (!ginfo->plots) {
+                ginfo->plot_array = malloc_or_die(sizeof(ginfo->plot_array[0]));
+                ginfo->plot_array[0] = plot;
+        } else {
+                ginfo->plot_array = realloc(ginfo->plot_array,
+                                            sizeof(ginfo->plot_array[0]) *
+                                            (ginfo->plots + 1));
+
+                if (!ginfo->plot_array)
+                        die("unable to resize plot array");
+
+                ginfo->plot_array[ginfo->plots] = plot;
+        }
+
+        ginfo->plots++;
+}