gfio: graphing updates

[fio.git] / tickmarks.c

diff --git a/tickmarks.c b/tickmarks.c
index 52fd556817a8102ef95d8d74a21a89db5d17a6a4..6a964e31a2a3715ebb11d6d93f1cf7b414fe927c 100644 (file)
--- a/tickmarks.c
+++ b/tickmarks.c
@@ -39,47 +39,56 @@ static double nicenum(double x, int round)
        return 10.0 * pow(10.0, exp);
 }
 
-static void shorten(struct tickmark *tm, int nticks)
+static void shorten(struct tickmark *tm, int nticks, int *power_of_ten,
+                       int use_KMG_symbols, int base_offset)
 {
-       int i, l, minshorten, can_shorten_by;
+       const char shorten_chr[] = { 0, 'K', 'M', 'G', 'P', 'E', 0 };
+       int i, l, minshorten, shorten_idx = 0;
        char *str;
-       char shorten_char = '?';
 
        minshorten = 100;
        for (i = 0; i < nticks; i++) {
                str = tm[i].string;
                l = strlen(str);
 
+               if (strcmp(str, "0") == 0)
+                       continue;
                if (l > 9 && strcmp(&str[l - 9], "000000000") == 0) {
-                       can_shorten_by = 9;
-                       shorten_char = 'G';
+                       *power_of_ten = 9;
+                       shorten_idx = 3;
                } else if (6 < minshorten && l > 6 &&
                                strcmp(&str[l - 6], "000000") == 0) {
-                       can_shorten_by = 6;
-                       shorten_char = 'M';
+                       *power_of_ten = 6;
+                       shorten_idx = 2;
                } else if (l > 3 && strcmp(&str[l - 3], "000") == 0) {
-                       can_shorten_by = 3;
-                       shorten_char = 'K';
+                       *power_of_ten = 3;
+                       shorten_idx = 1;
                } else {
-                       can_shorten_by = 0;
+                       *power_of_ten = 0;
                }
 
-               if (can_shorten_by < minshorten)
-                       minshorten = can_shorten_by;
+               if (*power_of_ten < minshorten)
+                       minshorten = *power_of_ten;
        }
 
        if (minshorten == 0)
                return;
+       if (!use_KMG_symbols)
+               shorten_idx = 0;
+       else if (base_offset)
+               shorten_idx += base_offset;
 
        for (i = 0; i < nticks; i++) {
                str = tm[i].string;
                l = strlen(str);
-               str[l - minshorten] = shorten_char;
-               str[l - minshorten + 1] = '\0';
+               str[l - minshorten] = shorten_chr[shorten_idx];
+               if (shorten_idx)
+                       str[l - minshorten + 1] = '\0';
        }
 }
 
-int calc_tickmarks(double min, double max, int nticks, struct tickmark **tm)
+int calc_tickmarks(double min, double max, int nticks, struct tickmark **tm,
+               int *power_of_ten, int use_KMG_symbols, int base_offset)
 {
        char str[100];
        int nfrac;
@@ -105,7 +114,7 @@ int calc_tickmarks(double min, double max, int nticks, struct tickmark **tm)
                sprintf((*tm)[i].string, str, x);
                i++;
        }
-       shorten(*tm, i);
+       shorten(*tm, i, power_of_ten, use_KMG_symbols, base_offset);
        return i;
 }