--- var.pod 2001/11/20 15:46:35 1.8
+++ var.pod 2001/12/03 10:51:27 1.9
@@ -201,6 +201,9 @@
char varinit;
char startdelim;
char enddelim;
+ char startindex;
+ char endindex;
+ char current_index;
char escape;
char *namechars;
} var_config_t;
@@ -218,6 +221,9 @@
'$', /* varinit */
'{', /* startdelim */
'}', /* enddelim */
+ '[', /* startindex */
+ ']', /* endindex */
+ '#', /* current_index */
'\\', /* escape */
"a-zA-Z0-9_" /* namechars */
};
@@ -304,7 +310,7 @@
function, which adheres to the var_cb_t function interface:
int lookup(void *context,
- const char *varname, size_t name_len,
+ const char *varname, size_t name_len, int index,
const char **data, size_t *data_len,
size_t *buffer_size);
@@ -336,6 +342,14 @@
The "name_len" parameter contains the length of the variable name
"varname" points to.
+=item int index
+
+The contents of this interger determines which entry of a variable
+array to look-up. If the variable specification that led to the
+execution of the lookup function did not contain an index, zero is
+provided per default. If "index" is negative, the callback must return
+the number of entries of the variable array.
+
=item const char **data
This is a pointer to the location where the callback function should
@@ -409,12 +423,15 @@
getenv(3) to lookup variables and to return them to var_expand():
int env_lookup(void *context,
- const char *varname, size_t name_len,
+ const char *varname, size_t name_len, int index,
const char **data, size_t *data_len,
size_t *buffer_size)
{
char tmp[256];
+ if (index != 0)
+ return VAR_ERR_ARRAY_LOOKUPS_ARE_UNSUPPORTED;
+
if (name_len > sizeof(tmp) - 1) {
/* Callback can't expand variable names longer than
sizeof(tmp) characters. */
@@ -841,6 +858,8 @@
var_unescape() encountered the backslash ('\') as the last character
of the input buffer.
+=item VAR_ERR_ARRAY_LOOKUPS_ARE_UNSUPPORTED
+
=back
=head1 SO ALSO
|
