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gc, ld: sync pathtoprefix + add comments

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R=lvd, lvd
CC=golang-dev
https://golang.org/cl/5332051
This commit is contained in:
Russ Cox 2011-11-03 12:44:51 -04:00
parent d6ff3c1177
commit 80bce97e45
2 changed files with 13 additions and 3 deletions
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2
src/cmd/gc/subr.c
View file

@ -2916,6 +2916,8 @@ ngotype(Node *n)
* non-7-bit clean bytes turn into %xx. The period needs escaping
* only in the last segment of the path, and it makes for happier
* users if we escape that as little as possible.
*
* If you edit this, edit ../ld/lib.c:/^pathtoprefix copy too.
*/
static char*
pathtoprefix(char *s)

14
src/cmd/ld/lib.c
View file

@ -903,18 +903,26 @@ unmal(void *v, uint32 n)
* Convert raw string to the prefix that will be used in the symbol table.
* Invalid bytes turn into %xx. Right now the only bytes that need
* escaping are %, ., and ", but we escape all control characters too.
*
* Must be same as ../gc/subr.c:/^pathtoprefix.
*/
static char*
pathtoprefix(char *s)
{
static char hex[] = "0123456789abcdef";
char *p, *r, *w;
char *p, *r, *w, *l;
int n;
// find first character past the last slash, if any.
l = s;
for(r=s; *r; r++)
if(*r == '/')
l = r+1;
// check for chars that need escaping
n = 0;
for(r=s; *r; r++)
if(*r <= ' ' || *r == '.' || *r == '%' || *r == '"')
if(*r <= ' ' || (*r == '.' && r >= l) || *r == '%' || *r == '"' || *r >= 0x7f)
n++;
// quick exit
@ -924,7 +932,7 @@ pathtoprefix(char *s)
// escape
p = mal((r-s)+1+2*n);
for(r=s, w=p; *r; r++) {
if(*r <= ' ' || *r == '.' || *r == '%' || *r == '"') {
if(*r <= ' ' || (*r == '.' && r >= l) || *r == '%' || *r == '"' || *r >= 0x7f) {
*w++ = '%';
*w++ = hex[(*r>>4)&0xF];
*w++ = hex[*r&0xF];