| 1 | /* $Cambridge: exim/src/src/lookups/lf_quote.c,v 1.4 2007/01/08 10:50:19 ph10 Exp $ */ |
| 2 | |
| 3 | /************************************************* |
| 4 | * Exim - an Internet mail transport agent * |
| 5 | *************************************************/ |
| 6 | |
| 7 | /* Copyright (c) University of Cambridge 1995 - 2007 */ |
| 8 | /* See the file NOTICE for conditions of use and distribution. */ |
| 9 | |
| 10 | |
| 11 | #include "../exim.h" |
| 12 | #include "lf_functions.h" |
| 13 | |
| 14 | |
| 15 | /************************************************* |
| 16 | * Add string to result, quoting if necessary * |
| 17 | *************************************************/ |
| 18 | |
| 19 | /* This function is called by some lookups that create name=value result |
| 20 | strings, to handle the quoting of the data. It adds "name=" to the result, |
| 21 | followed by appropriately quoted data, followed by a single space. |
| 22 | |
| 23 | Arguments: |
| 24 | name the field name |
| 25 | value the data value |
| 26 | vlength the data length |
| 27 | result the result pointer |
| 28 | asize points to the size variable |
| 29 | aoffset points to the offset variable |
| 30 | |
| 31 | Returns: the result pointer (possibly updated) |
| 32 | */ |
| 33 | |
| 34 | uschar * |
| 35 | lf_quote(uschar *name, uschar *value, int vlength, uschar *result, int *asize, |
| 36 | int *aoffset) |
| 37 | { |
| 38 | result = string_append(result, asize, aoffset, 2, name, US"="); |
| 39 | |
| 40 | /* NULL is handled as an empty string */ |
| 41 | |
| 42 | if (value == NULL) value = US""; |
| 43 | |
| 44 | /* Quote the value if it is empty, contains white space, or starts with a quote |
| 45 | character. */ |
| 46 | |
| 47 | if (value[0] == 0 || Ustrpbrk(value, " \t\n\r") != NULL || value[0] == '\"') |
| 48 | { |
| 49 | int j; |
| 50 | result = string_cat(result, asize, aoffset, US"\"", 1); |
| 51 | for (j = 0; j < vlength; j++) |
| 52 | { |
| 53 | if (value[j] == '\"' || value[j] == '\\') |
| 54 | result = string_cat(result, asize, aoffset, US"\\", 1); |
| 55 | result = string_cat(result, asize, aoffset, US value+j, 1); |
| 56 | } |
| 57 | result = string_cat(result, asize, aoffset, US"\"", 1); |
| 58 | } |
| 59 | else |
| 60 | { |
| 61 | result = string_cat(result, asize, aoffset, US value, vlength); |
| 62 | } |
| 63 | |
| 64 | return string_cat(result, asize, aoffset, US" ", 1); |
| 65 | } |
| 66 | |
| 67 | /* End of lf_quote.c */ |