Fix printbar and add a lot more tests

Previously printbar wasn't correctly calculating data width. The fill of
bars included the surrounding brackets (so a width of 10 was actually 8
+ 2 brackets). This makes the fill width the defined with, +2 extra
chars for the square bracket. This makes the fill calculations accurate
now.

2 files changed, 26 insertions, 10 deletions

diff --git a/src/common.c b/src/common.c
index e1bfaaf..812431a 100644
--- a/src/common.c
+++ b/src/common.c
@@ -47,27 +47,26 @@ char* trim(char* str) {
 }
 
 void print_bar(int width, float percent, char* buf) {
-  double fill = width * percent;
+  int fill_maj = width * percent;
+  int fill_min = (width * percent - fill_maj) * 10;
   int i = 1;
-  int remainder = 0;
 
   buf[0] = '[';
 
-  while(i < fill) {
+  while(i <= fill_maj) {
     buf[i] = ':';
     i++;
   }
 
-  remainder = (fill + 1 - i) * 10;
-  if(i > fill && remainder >= 5.0) {
-    buf[i] = ':';
-    i++;
-  } else if(i > fill && remainder < 5.0 && remainder > 0) {
-    buf[i] = '.';
+  if(fill_maj > 0 && fill_min > 0) {
+    if(fill_min >= 5)
+      buf[i] = ':';
+    else
+      buf[i] = '.';
     i++;
   }
 
-  while(i < width) {
+  while(i <= width) {
     buf[i] = ' ';
     i++;
   }
diff --git a/tests/test_common.c b/tests/test_common.c
index e08c0ee..42acf48 100644
--- a/tests/test_common.c
+++ b/tests/test_common.c
@@ -41,6 +41,23 @@ void test_bar() {
   print_bar(10, 0, buf);
   assert_strncmp(buf, "[  ", 3);
 
+  print_bar(8, 0, buf);
+  assert_strcmp(buf, "[        ]");
+
+  print_bar(8, 1, buf);
+  assert_strcmp(buf, "[::::::::]");
+
+  print_bar(8, .42, buf);
+  assert_strcmp(buf, "[:::.    ]");
+
+  // Fill is 0, so no colons or periods
+  print_bar(10, .13, buf);
+  assert_strcmp(buf, "[:.        ]");
+
+  // Fill is 0, so no colons or periods
+  print_bar(10, .17, buf);
+  assert_strncmp(buf, "[:: ", 4);
+
   // Fill is 2, +.5, so three colons
   print_bar(10, .25, buf);
   assert_strncmp(buf, "[::: ", 5);