Fio 3.15

[fio.git] / tickmarks.c

diff --git a/tickmarks.c b/tickmarks.c
index 52fd556817a8102ef95d8d74a21a89db5d17a6a4..88bace09dc945de34cbf3be94ef465cfa6a834af 100644 (file)
--- a/tickmarks.c
+++ b/tickmarks.c
@@ -1,9 +1,9 @@
 #include <stdio.h>
 #include <math.h>
-#include <malloc.h>
+#include <stdlib.h>
 #include <string.h>
 
-/* 
+/*
  * adapted from Paul Heckbert's algorithm on p 657-659 of
  * Andrew S. Glassner's book, "Graphics Gems"
  * ISBN 0-12-286166-3
@@ -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;
 }
 
@@ -119,20 +128,20 @@ static void test_range(double x, double y)
        printf("Testing range %g - %g\n", x, y);
        nticks = calc_tickmarks(x, y, 10, &tm);
 
-       for (i = 0; i < nticks; i++) {
+       for (i = 0; i < nticks; i++)
                printf("   (%s) %g\n", tm[i].string, tm[i].value);
-       }
+
        printf("\n\n");
        free(tm);
 }
 
 int main(int argc, char *argv[])
 {
-       test_range(0.0005, 0.008);      
-       test_range(0.5, 0.8);   
-       test_range(5.5, 8.8);   
-       test_range(50.5, 80.8); 
-       test_range(-20, 20.8);  
-       test_range(-30, 700.8); 
+       test_range(0.0005, 0.008);
+       test_range(0.5, 0.8);
+       test_range(5.5, 8.8);
+       test_range(50.5, 80.8);
+       test_range(-20, 20.8);
+       test_range(-30, 700.8);
 }
 #endif