#ifndef VAR_EXPAND_PRIVATE_H
#define VAR_EXPAND_PRIVATE_H 1
struct var_expand_context {
/* current variables */
const struct var_expand_table *table;
/* caller provided function table */
const struct var_expand_func_table *func_table;
/* caller provided context */
void *context;
/* last offset, negative counts from end*/
int offset;
/* last width, negative counts from end */
int width;
/* last zero padding */
bool zero_padding:1;
};
/* this can be used to register a *global* function that is
prepended to function table. These can be used to register some
special handling for keys.
you can call var_expand_with_funcs if you need to
expand something inside here.
return -1 on error, 0 on unknown variable, 1 on success
*/
typedef int
var_expand_extension_func_t(struct var_expand_context *ctx,
const char *key, const char *field,
const char **result_r, const char **error_r);
struct var_expand_extension_func_table {
const char *key;
var_expand_extension_func_t *func;
};
int var_expand_long(struct var_expand_context *ctx,
const void *key_start, size_t key_len,
const char **var_r, const char **error_r);
void var_expand_extensions_init(void);
void var_expand_extensions_deinit(void);
/* Functions registered here are placed before in-built functions,
so you can include your own implementation of something.
Be careful. Use NULL terminated list.
*/
void var_expand_register_func_array(const struct var_expand_extension_func_table *funcs);
void var_expand_unregister_func_array(const struct var_expand_extension_func_table *funcs);
int var_expand_if(struct var_expand_context *ctx,
const char *key, const char *field,
const char **result_r, const char **error_r);
#endif