| rsc | b2cfc4e | 2003-09-30 17:47:41 +0000 | [diff] [blame] | 1 | #include "lib9.h" |
| 2 | #include "regexp9.h" |
| 3 | |
| 4 | /* substitute into one string using the matches from the last regexec() */ |
| 5 | extern void |
| 6 | regsub(char *sp, /* source string */ |
| 7 | char *dp, /* destination string */ |
| 8 | int dlen, |
| 9 | Resub *mp, /* subexpression elements */ |
| 10 | int ms) /* number of elements pointed to by mp */ |
| 11 | { |
| 12 | char *ssp, *ep; |
| 13 | int i; |
| 14 | |
| 15 | ep = dp+dlen-1; |
| 16 | while(*sp != '\0'){ |
| 17 | if(*sp == '\\'){ |
| 18 | switch(*++sp){ |
| 19 | case '0': |
| 20 | case '1': |
| 21 | case '2': |
| 22 | case '3': |
| 23 | case '4': |
| 24 | case '5': |
| 25 | case '6': |
| 26 | case '7': |
| 27 | case '8': |
| 28 | case '9': |
| 29 | i = *sp-'0'; |
| 30 | if(mp[i].s.sp != 0 && mp!=0 && ms>i) |
| 31 | for(ssp = mp[i].s.sp; |
| 32 | ssp < mp[i].e.ep; |
| 33 | ssp++) |
| 34 | if(dp < ep) |
| 35 | *dp++ = *ssp; |
| 36 | break; |
| 37 | case '\\': |
| 38 | if(dp < ep) |
| 39 | *dp++ = '\\'; |
| 40 | break; |
| 41 | case '\0': |
| 42 | sp--; |
| 43 | break; |
| 44 | default: |
| 45 | if(dp < ep) |
| 46 | *dp++ = *sp; |
| 47 | break; |
| 48 | } |
| 49 | }else if(*sp == '&'){ |
| 50 | if(mp[0].s.sp != 0 && mp!=0 && ms>0) |
| 51 | if(mp[0].s.sp != 0) |
| 52 | for(ssp = mp[0].s.sp; |
| 53 | ssp < mp[0].e.ep; ssp++) |
| 54 | if(dp < ep) |
| 55 | *dp++ = *ssp; |
| rsc | 6239009 | 2004-03-05 05:13:56 +0000 | [diff] [blame^] | 56 | }else{ |
| rsc | b2cfc4e | 2003-09-30 17:47:41 +0000 | [diff] [blame] | 57 | if(dp < ep) |
| 58 | *dp++ = *sp; |
| rsc | 6239009 | 2004-03-05 05:13:56 +0000 | [diff] [blame^] | 59 | } |
| rsc | b2cfc4e | 2003-09-30 17:47:41 +0000 | [diff] [blame] | 60 | sp++; |
| 61 | } |
| 62 | *dp = '\0'; |
| 63 | } |
