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added cfg_parser_setcallback(); minor cleanup

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This commit is contained in:
Andreas Gustafsson 2001-02-22 00:23:31 +00:00
parent 9a41936e3d
commit 1b0fca7957
2 changed files with 60 additions and 10 deletions
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24
lib/isccfg/include/isccfg/cfg.h
View file

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: cfg.h,v 1.5 2001/02/17 00:15:22 gson Exp $ */
/* $Id: cfg.h,v 1.6 2001/02/22 00:23:31 gson Exp $ */
#ifndef DNS_CFG_H
#define DNS_CFG_H 1
@ -68,6 +68,14 @@ typedef struct cfg_obj cfg_obj_t;
*/
typedef struct cfg_listelt cfg_listelt_t;
/*
* A callback function to be called when parsing an option
* that needs to be interpreted at parsing time, like
* "directory".
*/
typedef isc_result_t
(*cfg_parsecallback_t)(const char *clausename, cfg_obj_t *obj, void *arg);
/***
*** Functions
***/
@ -81,6 +89,20 @@ cfg_parser_create(isc_mem_t *mctx, isc_log_t *lctx, cfg_parser_t **ret);
* messages will be logged to 'lctx'.
*/
void
cfg_parser_setcallback(cfg_parser_t *pctx,
cfg_parsecallback_t callback,
void *arg);
/*
* Make the parser call 'callback' whenever it encounters
* a configuration clause with the callback attribute,
* passing it the clause name, the clause value,
* and 'arg' as arguments.
*
* To restore the default of not invoking callbacks, pass
* callback==NULL and arg==NULL.
*/
isc_result_t
cfg_parse_file(cfg_parser_t *pctx, const char *filename,
cfg_type_t *type, cfg_obj_t **ret);

46
lib/isccfg/parser.c
View file

@ -15,7 +15,7 @@
* WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
*/
/* $Id: parser.c,v 1.10 2001/02/17 00:46:58 gson Exp $ */
/* $Id: parser.c,v 1.11 2001/02/22 00:23:29 gson Exp $ */
#include <config.h>
@ -47,9 +47,6 @@
#define LOG_BEFORE 0x00000002 /* Say "before <token>" */
#define LOG_NOPREP 0x00000004 /* Say just "<token>" */
#define ISC_R_BADTYPE 90
#define ISC_R_MULTIPLEVALUES 91
#define MAP_SYM 1 /* Unique type for isc_symtab */
/* Clause may occur multiple times (e.g., "zone") */
@ -60,8 +57,14 @@
#define CFG_CLAUSEFLAG_NOTIMP 0x00000004
/* Clause is not implemented yet */
#define CFG_CLAUSEFLAG_NYI 0x00000008
/* Default value has changed since earlier release*/
/* Default value has changed since earlier release */
#define CFG_CLAUSEFLAG_NEWDEFAULT 0x00000008
/*
* Clause needs to be interpreted during parsing
* by calling a callback function, like the
* "directory" option.
*/
#define CFG_CLAUSEFLAG_CALLBACK 0x00000010
/*
* Flags defining whether to accept certain types of network addresses.
@ -97,6 +100,7 @@ typedef isc_result_t (*cfg_parsefunc_t)(cfg_parser_t *, cfg_type_t *type,
typedef void (*cfg_printfunc_t)(cfg_printer_t *, cfg_obj_t *);
typedef void (*cfg_freefunc_t)(cfg_parser_t *, cfg_obj_t *);
/*
* Structure definitions
*/
@ -133,6 +137,9 @@ struct cfg_parser {
* when a file has just been closed.
*/
unsigned int line;
cfg_parsecallback_t callback;
void *callbackarg;
};
/* The printer object. */
@ -316,7 +323,8 @@ parse_negated(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret);
static isc_result_t
parse_symtab_elt(cfg_parser_t *pctx, const char *name,
cfg_type_t *elttype, isc_symtab_t *symtab);
cfg_type_t *elttype, isc_symtab_t *symtab,
isc_boolean_t callback);
static void
free_noop(cfg_parser_t *pctx, cfg_obj_t *obj);
@ -1196,6 +1204,8 @@ cfg_parser_create(isc_mem_t *mctx, isc_log_t *lctx, cfg_parser_t **ret)
pctx->errors = 0;
pctx->files = 0;
pctx->line = 0;
pctx->callback = NULL;
pctx->callbackarg = NULL;
memset(specials, 0, sizeof(specials));
specials['{'] = 1;
@ -1249,6 +1259,15 @@ parser_openfile(cfg_parser_t *pctx, const char *filename) {
return (result);
}
void
cfg_parser_setcallback(cfg_parser_t *pctx,
cfg_parsecallback_t callback,
void *arg)
{
pctx->callback = callback;
pctx->callbackarg = arg;
}
/*
* Parse a configuration using a pctx where a lexer has already
* been set up with a source.
@ -1986,7 +2005,7 @@ parse_controls_clause(cfg_parser_t *pctx, cfg_obj_t *mapobj,
return (ISC_R_UNEXPECTEDTOKEN);
}
CHECK(parse_symtab_elt(pctx, name, type,
mapobj->value.map.symtab));
mapobj->value.map.symtab, ISC_FALSE));
cleanup:
return (result);
@ -2806,9 +2825,13 @@ parse_mapbody(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret)
} else {
/* Single-valued clause */
if (result == ISC_R_NOTFOUND) {
isc_boolean_t callback =
ISC_TF((clause->flags &
CFG_CLAUSEFLAG_CALLBACK) != 0);
CHECK(parse_symtab_elt(pctx, clause->name,
clause->type,
obj->value.map.symtab));
obj->value.map.symtab,
callback));
CHECK(parse_semicolon(pctx));
} else if (result == ISC_R_SUCCESS) {
parser_error(pctx, LOG_NEAR, "'%s' redefined",
@ -2836,13 +2859,18 @@ parse_mapbody(cfg_parser_t *pctx, cfg_type_t *type, cfg_obj_t **ret)
static isc_result_t
parse_symtab_elt(cfg_parser_t *pctx, const char *name,
cfg_type_t *elttype, isc_symtab_t *symtab)
cfg_type_t *elttype, isc_symtab_t *symtab,
isc_boolean_t callback)
{
isc_result_t result;
cfg_obj_t *obj = NULL;
isc_symvalue_t symval;
CHECK(parse(pctx, elttype, &obj));
if (callback && pctx->callback != NULL)
CHECK(pctx->callback(name, obj, pctx->callbackarg));
symval.as_pointer = obj;
CHECK(isc_symtab_define(symtab, name,
1, symval,