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MINOR: sample: add function for browsing samples.

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This function is useful with the incoming lua functions.
This commit is contained in:
Thierry FOURNIER 2014-12-08 14:49:19 +01:00 committed by Willy Tarreau
parent 58639a0ef3
commit 4d9a1d1a5c
2 changed files with 44 additions and 0 deletions
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1
include/proto/sample.h
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@ -40,6 +40,7 @@ void sample_register_convs(struct sample_conv_kw_list *psl);
const char *sample_src_names(unsigned int use);
const char *sample_ckp_names(unsigned int use);
struct sample_fetch *find_sample_fetch(const char *kw, int len);
struct sample_fetch *sample_fetch_getnext(struct sample_fetch *current, int *idx);
int smp_resolve_args(struct proxy *p);
int smp_expr_output_type(struct sample_expr *expr);
int c_none(struct sample *smp);

43
src/sample.c
View File

@ -384,6 +384,49 @@ struct sample_fetch *find_sample_fetch(const char *kw, int len)
return NULL;
}
/* This fucntion browse the list of available saple fetch. <current> is
* the last used sample fetch. If it is the first call, it must set to NULL.
* <idx> is the index of the next sampleèfetch entry. It is used as private
* value. It is useles to initiate it.
*
* It returns always the newt fetch_sample entry, and NULL when the end of
* the list is reached.
*/
struct sample_fetch *sample_fetch_getnext(struct sample_fetch *current, int *idx)
{
struct sample_fetch_kw_list *kwl;
struct sample_fetch *base;
if (!current) {
/* Get first kwl entry. */
kwl = LIST_NEXT(&sample_fetches.list, struct sample_fetch_kw_list *, list);
(*idx) = 0;
} else {
/* Get kwl corresponding to the curret entry. */
base = current + 1 - (*idx);
kwl = container_of(base, struct sample_fetch_kw_list, kw);
}
while (1) {
/* Check if kwl is the last entry. */
if (&kwl->list == &sample_fetches.list)
return NULL;
/* idx contain the next keyword. If it is available, return it. */
if (kwl->kw[*idx].kw) {
(*idx)++;
return &kwl->kw[(*idx)-1];
}
/* get next entry in the main list, and return NULL if the end is reached. */
kwl = LIST_NEXT(&kwl->list, struct sample_fetch_kw_list *, list);
/* Set index to 0, ans do one other loop. */
(*idx) = 0;
}
}
/*
* Returns the pointer on sample format conversion keyword structure identified by
* string of <len> in buffer <kw>.