[dev.cc] cmd/internal/gc, cmd/new6g etc: convert from cmd/gc, cmd/6g etc
First draft of converted Go compiler, using rsc.io/c2go rev 83d795a.
Change-Id: I29f4c7010de07d2ff1947bbca9865879d83c32c3
Reviewed-on: https://go-review.googlesource.com/4851
Reviewed-by: Rob Pike <r@golang.org>
diff --git a/src/cmd/internal/gc/util.go b/src/cmd/internal/gc/util.go
new file mode 100644
index 0000000..ceb3eea
--- /dev/null
+++ b/src/cmd/internal/gc/util.go
@@ -0,0 +1,70 @@
+package gc
+
+import (
+ "cmd/internal/obj"
+ "strconv"
+ "strings"
+)
+
+func bool2int(b bool) int {
+ if b {
+ return 1
+ }
+ return 0
+}
+
+func (n *Node) Line() string {
+ return obj.Linklinefmt(Ctxt, int(n.Lineno), false, false)
+}
+
+func atoi(s string) int {
+ // NOTE: Not strconv.Atoi, accepts hex and octal prefixes.
+ n, _ := strconv.ParseInt(s, 0, 0)
+ return int(n)
+}
+
+func isalnum(c int) bool {
+ return isalpha(c) || isdigit(c)
+}
+
+func isalpha(c int) bool {
+ return 'A' <= c && c <= 'Z' || 'a' <= c && c <= 'z'
+}
+
+func isdigit(c int) bool {
+ return '0' <= c && c <= '9'
+}
+
+func plan9quote(s string) string {
+ if s == "" {
+ goto needquote
+ }
+ for i := 0; i < len(s); i++ {
+ if s[i] <= ' ' || s[i] == '\'' {
+ goto needquote
+ }
+ }
+ return s
+
+needquote:
+ return "'" + strings.Replace(s, "'", "''", -1) + "'"
+}
+
+// simulation of int(*s++) in C
+func intstarstringplusplus(s string) (int, string) {
+ if s == "" {
+ return 0, ""
+ }
+ return int(s[0]), s[1:]
+}
+
+// strings.Compare, introduced in Go 1.5.
+func stringsCompare(a, b string) int {
+ if a == b {
+ return 0
+ }
+ if a < b {
+ return -1
+ }
+ return +1
+}
