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gc: package paths in symbol names: don't escape periods before last slash, always escape >=0x7f.

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R=rsc
CC=golang-dev
https://golang.org/cl/5323071
This commit is contained in:
Luuk van Dijk 2011-11-02 22:33:15 +01:00
parent 965845a86d
commit 33f1d47b38
1 changed files with 14 additions and 6 deletions
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20
src/cmd/gc/subr.c
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@ -2911,21 +2911,29 @@ ngotype(Node *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.
* Convert raw string to the prefix that will be used in the symbol
* table. All control characters, space, '%' and '"', as well as
* 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.
*/
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
@ -2935,7 +2943,7 @@ 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];