go/usr/gri/pretty/utils.go
Russ Cox 60ce95d7a1 code changes for array conversion.
as a reminder, the old conversion
was that you could write

	var arr [10]byte;
	var slice []byte;
	slice = arr;

but now you have to write

	slice = &arr;

the change eliminates an implicit &, so that
the only implicit &s left are in the . operator
and in string(arr).

also, removed utf8.EncodeRuneToString
in favor of string(rune).

R=r
DELTA=83  (1 added, 23 deleted, 59 changed)
OCL=27531
CL=27534
2009-04-15 20:27:45 -07:00

92 lines
1.5 KiB
Go

// Copyright 2009 The Go Authors. All rights reserved.
// Use of this source code is governed by a BSD-style
// license that can be found in the LICENSE file.
package Utils
func BaseName(s string) string {
// TODO this is not correct for non-ASCII strings!
i := len(s) - 1;
for i >= 0 && s[i] != '/' {
if s[i] > 128 {
panic("non-ASCII string");
}
i--;
}
return s[i + 1 : len(s)];
}
func cleanPath(s string) string {
for i := 0; i < len(s); i++ {
if s[i] == '/' {
i++;
j := i;
for j < len(s) && s[j] == '/' {
j++;
}
if j > i { // more then one '/'
return s[0 : i] + cleanPath(s[j : len(s)]);
}
}
}
return s;
}
// Reduce sequences of multiple '/'s into a single '/' and
// strip any trailing '/' (may result in the empty string).
func SanitizePath(s string) string {
s = cleanPath(s);
if s[len(s)-1] == '/' { // strip trailing '/'
s = s[0 : len(s)-1];
}
return s;
}
func Contains(s, sub string, pos int) bool {
end := pos + len(sub);
return pos >= 0 && end <= len(s) && s[pos : end] == sub;
}
func TrimExt(s, ext string) string {
i := len(s) - len(ext);
if i >= 0 && s[i : len(s)] == ext {
s = s[0 : i];
}
return s;
}
func IntToString(x, base int) string {
x0 := x;
if x < 0 {
x = -x;
if x < 0 {
panic("smallest int not handled");
}
} else if x == 0 {
return "0";
}
// x > 0
hex := "0123456789ABCDEF";
var buf [32] byte;
i := len(buf);
for x > 0 {
i--;
buf[i] = hex[x % base];
x /= base;
}
if x0 < 0 {
i--;
buf[i] = '-';
}
return string(buf[i : len(buf)]);
}