1 files changed, 61 insertions, 0 deletions
diff --git a/vendor/github.com/chenzhuoyu/iasm/expr/utils.go b/vendor/github.com/chenzhuoyu/iasm/expr/utils.go
new file mode 100644
index 000000000..03a98b85b
--- /dev/null
+++ b/vendor/github.com/chenzhuoyu/iasm/expr/utils.go
@@ -0,0 +1,61 @@
+package expr
+
+var op1ch = [...]bool {
+    '+': true,
+    '-': true,
+    '*': true,
+    '/': true,
+    '%': true,
+    '&': true,
+    '|': true,
+    '^': true,
+    '~': true,
+    '(': true,
+    ')': true,
+}
+
+var op2ch = [...]bool {
+    '*': true,
+    '<': true,
+    '>': true,
+}
+
+func neg2(v *Expr, err error) (*Expr, error) {
+    if err != nil {
+        return nil, err
+    } else {
+        return v.Neg(), nil
+    }
+}
+
+func not2(v *Expr, err error) (*Expr, error) {
+    if err != nil {
+        return nil, err
+    } else {
+        return v.Not(), nil
+    }
+}
+
+func isop1ch(ch rune) bool {
+    return ch >= 0 && int(ch) < len(op1ch) && op1ch[ch]
+}
+
+func isop2ch(ch rune) bool {
+    return ch >= 0 && int(ch) < len(op2ch) && op2ch[ch]
+}
+
+func isdigit(ch rune) bool {
+    return ch >= '0' && ch <= '9'
+}
+
+func isident(ch rune) bool {
+    return isdigit(ch) || isident0(ch)
+}
+
+func isident0(ch rune) bool {
+    return (ch == '_') || (ch >= 'a' && ch <= 'z') || (ch >= 'A' && ch <= 'Z')
+}
+
+func ishexdigit(ch rune) bool {
+    return isdigit(ch) || (ch >= 'a' && ch <= 'f') || (ch >= 'A' && ch <= 'F')
+}