cirno/plan9port
1
0
Fork 0
mirror of https://github.com/9fans/plan9port.git synced 2025-01-12 11:10:07 +00:00
Code Issues Projects Releases Packages Wiki Activity Actions

plumber: allow multi-digit subexpression match variable substitutions

Browse source
This commit is contained in:
Igor Burago 2022-07-27 17:27:06 +08:00 committed by Dan Cross
parent 760cf86705
commit 6c0efecd13
1 changed files with 23 additions and 2 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

25
src/cmd/plumb/rules.c
View file

@ -254,15 +254,36 @@ filename(Exec *e, char *name)
return cleanname(buf); return cleanname(buf);
} }
static char*
subexpmatch(Exec *e, char *s, int *numlen)
{
int n, d, ok;
char *t;
n = 0;
ok = 1;
for(t = s; '0'<=*t && *t<='9'; t++)
if(ok){
d = *t-'0';
if(d<NMATCHSUBEXP && n<=(NMATCHSUBEXP-1-d)/10)
n = 10*n+d;
else
ok = 0;
}
*numlen = t-s;
if(t==s || !ok)
return nil;
return e->match[n];
}
char* char*
dollar(Exec *e, char *s, int *namelen) dollar(Exec *e, char *s, int *namelen)
{ {
int n; int n;
static char *abuf; static char *abuf;
*namelen = 1;
if(e!=nil && '0'<=s[0] && s[0]<='9') if(e!=nil && '0'<=s[0] && s[0]<='9')
return nonnil(e->match[s[0]-'0']); return nonnil(subexpmatch(e, s, namelen));
n = scanvarname(s)-s; n = scanvarname(s)-s;
*namelen = n; *namelen = n;