56 lines
1.1 KiB
C
56 lines
1.1 KiB
C
//
|
|
// definitions.c - Code for defining named pattern rules
|
|
//
|
|
|
|
#include <err.h>
|
|
#include <stdlib.h>
|
|
#include <string.h>
|
|
|
|
#include "definitions.h"
|
|
#include "pattern.h"
|
|
#include "utils.h"
|
|
|
|
static size_t next_id = 0;
|
|
|
|
//
|
|
// Return a new list of definitions with one added to the front
|
|
//
|
|
def_t *with_def(def_t *defs, size_t namelen, const char *name, pat_t *pat)
|
|
{
|
|
def_t *def = new(def_t);
|
|
def->id = next_id++;
|
|
def->next = defs;
|
|
def->namelen = namelen;
|
|
def->name = name;
|
|
def->pat = pat;
|
|
return def;
|
|
}
|
|
|
|
//
|
|
// Look up a backreference or grammar definition by name
|
|
//
|
|
def_t *lookup(def_t *defs, size_t namelen, const char *name)
|
|
{
|
|
for ( ; defs; defs = defs->next) {
|
|
if (namelen == defs->namelen && strncmp(defs->name, name, namelen) == 0)
|
|
return defs;
|
|
}
|
|
return NULL;
|
|
}
|
|
|
|
//
|
|
// Free all the given definitions up till (but not including) `stop`
|
|
//
|
|
def_t *free_defs(def_t *defs, def_t *stop)
|
|
{
|
|
while (defs != stop && defs != NULL) {
|
|
def_t *next = defs->next;
|
|
defs->next = NULL;
|
|
free(defs);
|
|
defs = next;
|
|
}
|
|
return defs;
|
|
}
|
|
|
|
// vim: ts=4 sw=0 et cino=L2,l1,(0,W4,m1,\:0
|