| rsc | fd04aac | 2003-11-23 18:12:54 +0000 | [diff] [blame] | 1 | #include <u.h> |
| 2 | #include <libc.h> |
| 3 | |
| rsc | fd04aac | 2003-11-23 18:12:54 +0000 | [diff] [blame] | 4 | |
| 5 | /* in libfmt */ |
| rsc | 53dbac9 | 2004-03-02 16:58:49 +0000 | [diff] [blame] | 6 | extern int (*doquote)(int); |
| rsc | fd04aac | 2003-11-23 18:12:54 +0000 | [diff] [blame] | 7 | extern int __needsquotes(char*, int*); |
| 8 | extern int __runeneedsquotes(Rune*, int*); |
| 9 | |
| 10 | char* |
| 11 | unquotestrdup(char *s) |
| 12 | { |
| 13 | char *t, *ret; |
| 14 | int quoting; |
| 15 | |
| 16 | ret = s = strdup(s); /* return unquoted copy */ |
| 17 | if(ret == nil) |
| 18 | return ret; |
| 19 | quoting = 0; |
| 20 | t = s; /* s is output string, t is input string */ |
| 21 | while(*t!='\0' && (quoting || (*t!=' ' && *t!='\t'))){ |
| 22 | if(*t != '\''){ |
| 23 | *s++ = *t++; |
| 24 | continue; |
| 25 | } |
| 26 | /* *t is a quote */ |
| 27 | if(!quoting){ |
| 28 | quoting = 1; |
| 29 | t++; |
| 30 | continue; |
| 31 | } |
| 32 | /* quoting and we're on a quote */ |
| 33 | if(t[1] != '\''){ |
| 34 | /* end of quoted section; absorb closing quote */ |
| 35 | t++; |
| 36 | quoting = 0; |
| 37 | continue; |
| 38 | } |
| 39 | /* doubled quote; fold one quote into two */ |
| 40 | t++; |
| 41 | *s++ = *t++; |
| 42 | } |
| 43 | if(t != s) |
| 44 | memmove(s, t, strlen(t)+1); |
| 45 | return ret; |
| 46 | } |
| 47 | |
| 48 | Rune* |
| 49 | unquoterunestrdup(Rune *s) |
| 50 | { |
| 51 | Rune *t, *ret; |
| 52 | int quoting; |
| 53 | |
| 54 | ret = s = runestrdup(s); /* return unquoted copy */ |
| 55 | if(ret == nil) |
| 56 | return ret; |
| 57 | quoting = 0; |
| 58 | t = s; /* s is output string, t is input string */ |
| 59 | while(*t!='\0' && (quoting || (*t!=' ' && *t!='\t'))){ |
| 60 | if(*t != '\''){ |
| 61 | *s++ = *t++; |
| 62 | continue; |
| 63 | } |
| 64 | /* *t is a quote */ |
| 65 | if(!quoting){ |
| 66 | quoting = 1; |
| 67 | t++; |
| 68 | continue; |
| 69 | } |
| 70 | /* quoting and we're on a quote */ |
| 71 | if(t[1] != '\''){ |
| 72 | /* end of quoted section; absorb closing quote */ |
| 73 | t++; |
| 74 | quoting = 0; |
| 75 | continue; |
| 76 | } |
| 77 | /* doubled quote; fold one quote into two */ |
| 78 | t++; |
| 79 | *s++ = *t++; |
| 80 | } |
| 81 | if(t != s) |
| 82 | memmove(s, t, (runestrlen(t)+1)*sizeof(Rune)); |
| 83 | return ret; |
| 84 | } |
| 85 | |
| 86 | char* |
| 87 | quotestrdup(char *s) |
| 88 | { |
| 89 | char *t, *u, *ret; |
| 90 | int quotelen; |
| 91 | Rune r; |
| 92 | |
| 93 | if(__needsquotes(s, "elen) == 0) |
| 94 | return strdup(s); |
| 95 | |
| 96 | ret = malloc(quotelen+1); |
| 97 | if(ret == nil) |
| 98 | return nil; |
| 99 | u = ret; |
| 100 | *u++ = '\''; |
| 101 | for(t=s; *t; t++){ |
| 102 | r = *t; |
| rsc | bb0266f | 2005-05-07 22:42:06 +0000 | [diff] [blame] | 103 | if(r == '\'') |
| rsc | fd04aac | 2003-11-23 18:12:54 +0000 | [diff] [blame] | 104 | *u++ = r; /* double the quote */ |
| 105 | *u++ = r; |
| 106 | } |
| 107 | *u++ = '\''; |
| 108 | *u = '\0'; |
| 109 | return ret; |
| 110 | } |
| 111 | |
| 112 | Rune* |
| 113 | quoterunestrdup(Rune *s) |
| 114 | { |
| 115 | Rune *t, *u, *ret; |
| 116 | int quotelen; |
| 117 | Rune r; |
| 118 | |
| 119 | if(__runeneedsquotes(s, "elen) == 0) |
| 120 | return runestrdup(s); |
| 121 | |
| 122 | ret = malloc((quotelen+1)*sizeof(Rune)); |
| 123 | if(ret == nil) |
| 124 | return nil; |
| 125 | u = ret; |
| 126 | *u++ = '\''; |
| 127 | for(t=s; *t; t++){ |
| 128 | r = *t; |
| rsc | bb0266f | 2005-05-07 22:42:06 +0000 | [diff] [blame] | 129 | if(r == '\'') |
| rsc | fd04aac | 2003-11-23 18:12:54 +0000 | [diff] [blame] | 130 | *u++ = r; /* double the quote */ |
| 131 | *u++ = r; |
| 132 | } |
| 133 | *u++ = '\''; |
| 134 | *u = '\0'; |
| 135 | return ret; |
| 136 | } |
