Combine the percentify() functions from Cachegrind and m_transtab into
a single more general one exported from m_libcprint.
git-svn-id: svn://svn.valgrind.org/valgrind/trunk@4034 a5019735-40e9-0310-863c-91ae7b9d1cf9
diff --git a/coregrind/m_libcprint.c b/coregrind/m_libcprint.c
index 9e55a94..c51bd1d 100644
--- a/coregrind/m_libcprint.c
+++ b/coregrind/m_libcprint.c
@@ -151,6 +151,47 @@
}
/* ---------------------------------------------------------------------
+ percentify()
+ ------------------------------------------------------------------ */
+
+// Percentify n/m with p decimal places. Includes the '%' symbol at the end.
+void VG_(percentify)(UInt n, UInt m, UInt d, Int n_buf, char buf[])
+{
+ Int i, len, space;
+
+ ULong p1 = (100*n) / m;
+
+ if (d == 0) {
+ VG_(sprintf)(buf, "%lld%%", p1);
+ } else {
+ ULong p2;
+ UInt ex;
+ Char fmt[32];
+ switch (d) {
+ case 1: ex = 10; break;
+ case 2: ex = 100; break;
+ case 3: ex = 1000; break;
+ default: VG_(tool_panic)("Currently can only handle 3 decimal places");
+ }
+ p2 = ((100*n*ex) / m) % ex;
+ // Have to generate the format string in order to be flexible about
+ // the width of the post-decimal-point part.
+ VG_(sprintf)(fmt, "%%lld.%%0%dlld%%%%", d);
+ // fmt is now "%lld.%0<d>lld%%" where <d> is 1,2,3...
+ VG_(sprintf)(buf, fmt, p1, p2);
+ }
+
+ len = VG_(strlen)(buf);
+ space = n_buf - len;
+ if (space < 0) space = 0; /* Allow for v. small field_width */
+ i = len;
+
+ /* Right justify in field */
+ for ( ; i >= 0; i--) buf[i + space] = buf[i];
+ for (i = 0; i < space; i++) buf[i] = ' ';
+}
+
+/* ---------------------------------------------------------------------
message()
------------------------------------------------------------------ */