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Document SMARTLIST_FOREACH macro, along with previously-naughty foo_sl_idx variable.

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svn:r5000
This commit is contained in:
Nick Mathewson 2005-09-11 23:14:14 +00:00
parent 70958407f7
commit 24bfac635d
1 changed files with 16 additions and 0 deletions
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16
src/common/container.h
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@ -64,6 +64,22 @@ char *smartlist_join_strings(smartlist_t *sl, const char *join, int terminate,
char *smartlist_join_strings2(smartlist_t *sl, const char *join,
size_t join_len, int terminate, size_t *len_out);
/** Iterate over the items in a smartlist <b>sl</b>, in order. For each item,
* assign it to a new local variable of type <b>type</b> named <b>var</b>, and
* execute the statement <b>cmd</b>. Inside the loop, the loop index can
* be accessed as <b>var</b>_sl_idx.
*
* Example use:
* <pre>
* smartlist_t *list = smartlist_split("A:B:C", ":", 0, 0);
* SMARTLIST_FOREACH(list, char *, cp,
* {
* printf("%d: %s\n", cp_sl_idx, cp);
* tor_free(cp);
* });
* smarlitst_free(list);
* </pre>
*/
#define SMARTLIST_FOREACH(sl, type, var, cmd) \
do { \
int var ## _sl_idx, var ## _sl_len=smartlist_len(sl); \