From: Thadeu Lima de Souza Cascardo <cascardo@cascardo.eti.br>
Date: Sun, 11 Dec 2016 13:39:39 +0000 (-0200)
Subject: pmhash: permite iterar os valores.
X-Git-Url: http://git.cascardo.info/?p=cascardo%2Fdeclara.git;a=commitdiff_plain;h=a0bd651ece702749b0d63b903b7ca34fd9b670e1

pmhash: permite iterar os valores.

A função pmhash_next retorna o próximo valor de um hash dado um iterador
opaco que deve ser iniciado com NULL.
---

diff --git a/lib/pmhash.c b/lib/pmhash.c
index 5bada1e..2bf6c43 100644
--- a/lib/pmhash.c
+++ b/lib/pmhash.c
@@ -95,3 +95,17 @@ void pmhash_del(struct pmhash *pmhash)
 	}
 	free(pmhash);
 }
+
+void * pmhash_next(struct pmhash *pmhash, void **iter)
+{
+	int i;
+	struct item *item = *iter;
+	if (item == NULL)
+		i = 0;
+	else
+		i = item - pmhash->items + 1;
+	if (i >= (int) pmhash->len)
+		return NULL;
+	*iter = pmhash->items + i;
+	return pmhash->items[i].val;
+}
diff --git a/lib/pmhash.h b/lib/pmhash.h
index d1c0206..a4e6019 100644
--- a/lib/pmhash.h
+++ b/lib/pmhash.h
@@ -25,5 +25,6 @@ struct pmhash * pmhash_new(void);
 int pmhash_add(struct pmhash **pmhash, char *key, void *val);
 void * pmhash_get(struct pmhash *pmhash, char *key);
 void pmhash_del(struct pmhash *pmhash);
+void * pmhash_next(struct pmhash *pmhash, void **iter);
 
 #endif