Initial commit

1 files changed, 58 insertions, 0 deletions

diff --git a/unix/boot/spp/rpp/ratlibr/gctoi.r b/unix/boot/spp/rpp/ratlibr/gctoi.r
new file mode 100644
index 00000000..8efabe4f
--- /dev/null
+++ b/unix/boot/spp/rpp/ratlibr/gctoi.r
@@ -0,0 +1,58 @@
+include	defs
+
+# gctoi --- convert any radix string to single precision integer
+
+   integer function gctoi (str, i, radix)
+   character str (ARB)
+   integer i, radix
+
+   integer base, v, d, j
+   external index
+   integer index
+
+   character clower
+
+   logical neg
+
+   string digits "0123456789abcdef"
+
+   v = 0
+   base = radix
+
+   while (str (i) == BLANK | str (i) == TAB)
+      i = i + 1
+
+   neg = (str (i) == MINUS)
+   if (str (i) == PLUS | str (i) == MINUS)
+      i = i + 1
+
+   if (str (i + 2) == LETR & str (i) == DIG1 & IS_DIGIT(str (i + 1))
+	 | str (i + 1) == LETR & IS_DIGIT(str (i))) {
+      base = str (i) - DIG0
+      j = i
+      if (str (i + 1) != LETR) {
+	 j = j + 1
+	 base = base * 10 + (str (j) - DIG0)
+	 }
+      if (base < 2 | base > 16)
+	 base = radix
+      else
+	 i = j + 2
+      }
+
+   for (; str (i) != EOS; i = i + 1) {
+      if (IS_DIGIT(str (i)))
+	 d = str (i) - DIG0
+      else
+	 d = index (digits, clower (str (i))) - 1
+      if (d < 0 | d >= base)
+	 break
+      v = v * base + d
+      }
+
+   if (neg)
+      return (-v)
+   else
+      return (+v)
+
+   end