diff options
Diffstat (limited to 'src/libregexp/rregsub.c')
-rw-r--r-- | src/libregexp/rregsub.c | 55 |
1 files changed, 55 insertions, 0 deletions
diff --git a/src/libregexp/rregsub.c b/src/libregexp/rregsub.c new file mode 100644 index 00000000..15f3c174 --- /dev/null +++ b/src/libregexp/rregsub.c @@ -0,0 +1,55 @@ +#include "lib9.h" +#include "regexp9.h" + +/* substitute into one string using the matches from the last regexec() */ +extern void +rregsub(Rune *sp, /* source string */ + Rune *dp, /* destination string */ + Resub *mp, /* subexpression elements */ + int ms) /* number of elements pointed to by mp */ +{ + Rune *ssp; + int i; + + while(*sp != '\0'){ + if(*sp == '\\'){ + switch(*++sp){ + case '0': + case '1': + case '2': + case '3': + case '4': + case '5': + case '6': + case '7': + case '8': + case '9': + i = *sp-'0'; + if(mp[i].s.rsp != 0 && mp!=0 && ms>i) + for(ssp = mp[i].s.rsp; + ssp < mp[i].e.rep; + ssp++) + *dp++ = *ssp; + break; + case '\\': + *dp++ = '\\'; + break; + case '\0': + sp--; + break; + default: + *dp++ = *sp; + break; + } + }else if(*sp == '&'){ + if(mp[0].s.rsp != 0 && mp!=0 && ms>0) + if(mp[0].s.rsp != 0) + for(ssp = mp[0].s.rsp; + ssp < mp[0].e.rep; ssp++) + *dp++ = *ssp; + }else + *dp++ = *sp; + sp++; + } + *dp = '\0'; +} |