src/lookups/lf_quote.c

/*************************************************
*     Exim - an Internet mail transport agent    *
*************************************************/

/* Copyright (c) University of Cambridge 1995 - 2018 */
/* See the file NOTICE for conditions of use and distribution. */


#include "../exim.h"
#include "lf_functions.h"


/*************************************************
*   Add string to result, quoting if necessary   *
*************************************************/

/* This function is called by some lookups that create name=value result
strings, to handle the quoting of the data. It adds "name=" to the result,
followed by appropriately quoted data, followed by a single space.

Arguments:
  name           the field name
  value          the data value
  vlength        the data length
  result         the result expanding-string

Returns:         the result pointer (possibly updated)
*/

gstring *
lf_quote(uschar *name, uschar *value, int vlength, gstring * result)
{
result = string_append(result, 2, name, US"=");

/* NULL is handled as an empty string */

if (!value)
  {
  value = US"";
  vlength = 0;
  }

/* Quote the value if it is empty, contains white space, or starts with a quote
character. */

if (value[0] == 0 || Ustrpbrk(value, " \t\n\r") != NULL || value[0] == '\"')
  {
  int j;
  result = string_catn(result, US"\"", 1);
  for (j = 0; j < vlength; j++)
    {
    if (value[j] == '\"' || value[j] == '\\')
      result = string_catn(result, US"\\", 1);
    result = string_catn(result, US value+j, 1);
    }
  result = string_catn(result, US"\"", 1);
  }
else
  result = string_catn(result, US value, vlength);

return string_catn(result, US" ", 1);
}

/* End of lf_quote.c */
Commit	Line	Data
	1	/*************************************************
	2	* Exim - an Internet mail transport agent *
	3	*************************************************/
	4
	5	/* Copyright (c) University of Cambridge 1995 - 2018 */
	6	/* See the file NOTICE for conditions of use and distribution. */
	7
	8
	9	#include "../exim.h"
	10	#include "lf_functions.h"
	11
	12
	13	/*************************************************
	14	* Add string to result, quoting if necessary *
	15	*************************************************/
	16
	17	/* This function is called by some lookups that create name=value result
	18	strings, to handle the quoting of the data. It adds "name=" to the result,
	19	followed by appropriately quoted data, followed by a single space.
	20
	21	Arguments:
	22	name the field name
	23	value the data value
	24	vlength the data length
	25	result the result expanding-string
	26
	27	Returns: the result pointer (possibly updated)
	28	*/
	29
	30	gstring *
	31	lf_quote(uschar name, uschar value, int vlength, gstring * result)
	32	{
	33	result = string_append(result, 2, name, US"=");
	34
	35	/* NULL is handled as an empty string */
	36
	37	if (!value)
	38	{
	39	value = US"";
	40	vlength = 0;
	41	}
	42
	43	/* Quote the value if it is empty, contains white space, or starts with a quote
	44	character. */
	45
	46	if (value[0] == 0 \|\| Ustrpbrk(value, " \t\n\r") != NULL \|\| value[0] == '\"')
	47	{
	48	int j;
	49	result = string_catn(result, US"\"", 1);
	50	for (j = 0; j < vlength; j++)
	51	{
	52	if (value[j] == '\"' \|\| value[j] == '\\')
	53	result = string_catn(result, US"\\", 1);
	54	result = string_catn(result, US value+j, 1);
	55	}
	56	result = string_catn(result, US"\"", 1);
	57	}
	58	else
	59	result = string_catn(result, US value, vlength);
	60
	61	return string_catn(result, US" ", 1);
	62	}
	63
	64	/* End of lf_quote.c */