gfio: right justify y-axis labels

[fio.git] / tickmarks.c

diff --git a/tickmarks.c b/tickmarks.c
index 7766acd29a6e13af8d795451518383e9aa709408..c99f5cd5cf890167944998da6fd3d938e1efb6a8 100644 (file)
--- a/tickmarks.c
+++ b/tickmarks.c
@@ -1,6 +1,7 @@
 #include <stdio.h>
 #include <math.h>
 #include <malloc.h>
+#include <string.h>
 
 /* 
  * adapted from Paul Heckbert's algorithm on p 657-659 of
@@ -38,6 +39,23 @@ static double nicenum(double x, int round)
        return 10.0 * pow(10.0, exp);
 }
 
+static void shorten(char *str)
+{
+       int l;
+
+       l = strlen(str);
+       if (l > 9 && strcmp(&str[l - 9], "000000000") == 0) {
+               str[l - 9] = 'G';
+               str[l - 8] = '\0';
+       } else if (l > 9 && strcmp(&str[l - 6], "000000") == 0) {
+               str[l - 6] = 'M';
+               str[l - 5] = '\0';
+       } else if (l > 9 && strcmp(&str[l - 3], "000") == 0) {
+               str[l - 3] = 'K';
+               str[l - 2] = '\0';
+       }
+}
+
 int calc_tickmarks(double min, double max, int nticks, struct tickmark **tm)
 {
        char str[100];
@@ -62,6 +80,7 @@ int calc_tickmarks(double min, double max, int nticks, struct tickmark **tm)
        for (x = graphmin; x < graphmax + 0.5 * d; x += d) {
                (*tm)[i].value = x;
                sprintf((*tm)[i].string, str, x);
+               shorten((*tm)[i].string);
                i++;
        }
        return i;