add new property list implementation

git-svn-id: file:///home/lennart/svn/public/pulseaudio/trunk@2085 fefdeb5f-60dc-0310-8127-8f9354f1896f

1 files changed, 244 insertions, 0 deletions

diff --git a/src/pulse/proplist.c b/src/pulse/proplist.c
new file mode 100644
index 00000000..1c2614a0
--- /dev/null
+++ b/src/pulse/proplist.c
@@ -0,0 +1,244 @@
+/* $Id$ */
+
+/***
+  This file is part of PulseAudio.
+
+  Copyright 2007 Lennart Poettering
+
+  PulseAudio is free software; you can redistribute it and/or modify
+  it under the terms of the GNU Lesser General Public License as
+  published by the Free Software Foundation; either version 2.1 of the
+  License, or (at your option) any later version.
+
+  PulseAudio is distributed in the hope that it will be useful, but
+  WITHOUT ANY WARRANTY; without even the implied warranty of
+  MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
+  Lesser General Public License for more details.
+
+  You should have received a copy of the GNU Lesser General Public
+  License along with PulseAudio; if not, write to the Free Software
+  Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
+  USA.
+***/
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+
+#include <string.h>
+
+#include <pulse/xmalloc.h>
+#include <pulse/utf8.h>
+
+#include <pulsecore/hashmap.h>
+#include <pulsecore/strbuf.h>
+#include <pulsecore/core-util.h>
+
+#include "proplist.h"
+
+struct property {
+    char *key;
+    void *value;
+    size_t nbytes;
+};
+
+#define MAKE_HASHMAP(p) ((pa_hashmap*) (p))
+#define MAKE_PROPLIST(p) ((pa_proplist*) (p))
+
+static pa_bool_t property_name_valid(const char *key) {
+
+    if (!pa_utf8_valid(key))
+        return FALSE;
+
+    if (strlen(key) <= 0)
+        return FALSE;
+
+    return TRUE;
+}
+
+static void property_free(struct property *prop) {
+    pa_assert(prop);
+
+    pa_xfree(prop->key);
+    pa_xfree(prop->value);
+    pa_xfree(prop);
+}
+
+pa_proplist* pa_proplist_new(void) {
+    return MAKE_PROPLIST(pa_hashmap_new(pa_idxset_string_hash_func, pa_idxset_string_compare_func));
+}
+
+void pa_proplist_free(pa_proplist* p) {
+    struct property *prop;
+
+    while ((prop = pa_hashmap_steal_first(MAKE_HASHMAP(p))))
+        property_free(prop);
+
+    pa_hashmap_free(MAKE_HASHMAP(p), NULL, NULL);
+}
+
+/** Will accept only valid UTF-8 */
+int pa_proplist_puts(pa_proplist *p, const char *key, const char *value) {
+    struct property *prop;
+    pa_bool_t add = FALSE;
+
+    pa_assert(p);
+    pa_assert(key);
+
+    if (!property_name_valid(key) || !pa_utf8_valid(value))
+        return -1;
+
+    if (!(prop = pa_hashmap_get(MAKE_HASHMAP(p), key))) {
+        prop = pa_xnew(struct property, 1);
+        prop->key = pa_xstrdup(key);
+        add = TRUE;
+    } else
+        pa_xfree(prop->value);
+
+    prop->value = pa_xstrdup(value);
+    prop->nbytes = strlen(value)+1;
+
+    if (add)
+        pa_hashmap_put(MAKE_HASHMAP(p), prop->key, prop);
+
+    return 0;
+}
+
+int pa_proplist_put(pa_proplist *p, const char *key, const void *data, size_t nbytes) {
+    struct property *prop;
+    pa_bool_t add = FALSE;
+
+    pa_assert(p);
+    pa_assert(key);
+
+    if (!property_name_valid(key))
+        return -1;
+
+    if (!(prop = pa_hashmap_get(MAKE_HASHMAP(p), key))) {
+        prop = pa_xnew(struct property, 1);
+        prop->key = pa_xstrdup(key);
+        add = TRUE;
+    } else
+        pa_xfree(prop->value);
+
+    prop->value = pa_xmemdup(data, nbytes);
+    prop->nbytes = nbytes;
+
+    if (add)
+        pa_hashmap_put(MAKE_HASHMAP(p), prop->key, prop);
+
+    return 0;
+}
+
+const char *pa_proplist_gets(pa_proplist *p, const char *key) {
+    struct property *prop;
+
+    pa_assert(p);
+    pa_assert(key);
+
+    if (!property_name_valid(key))
+        return NULL;
+
+    if (!(prop = pa_hashmap_get(MAKE_HASHMAP(p), key)))
+        return NULL;
+
+    if (prop->nbytes <= 0)
+        return NULL;
+
+    if (((char*) prop->value)[prop->nbytes-1] != 0)
+        return NULL;
+
+    if (strlen((char*) prop->value) != prop->nbytes-1)
+        return NULL;
+
+    if (!pa_utf8_valid((char*) prop->value))
+        return NULL;
+
+    return (char*) prop->value;
+}
+
+int pa_proplist_get(pa_proplist *p, const char *key, const void **data, size_t *nbytes) {
+    struct property *prop;
+
+    pa_assert(p);
+    pa_assert(key);
+
+    if (!property_name_valid(key))
+        return -1;
+
+    if (!(prop = pa_hashmap_get(MAKE_HASHMAP(p), key)))
+        return -1;
+
+    *data = prop->value;
+    *nbytes = prop->nbytes;
+
+    return 0;
+}
+
+void pa_proplist_merge(pa_proplist *p, pa_proplist *other) {
+    struct property *prop;
+    void *state = NULL;
+
+    pa_assert(p);
+    pa_assert(other);
+
+    while ((prop = pa_hashmap_iterate(MAKE_HASHMAP(other), &state, NULL)))
+        pa_assert_se(pa_proplist_put(p, prop->key, prop->value, prop->nbytes) == 0);
+}
+
+int pa_proplist_remove(pa_proplist *p, const char *key) {
+    struct property *prop;
+
+    pa_assert(p);
+    pa_assert(key);
+
+    if (!property_name_valid(key))
+        return -1;
+
+    if (!(prop = pa_hashmap_remove(MAKE_HASHMAP(p), key)))
+        return -1;
+
+    property_free(prop);
+    return 0;
+}
+
+const char *pa_proplist_iterate(pa_proplist *p, void **state) {
+    struct property *prop;
+
+    if (!(prop = pa_hashmap_iterate(MAKE_HASHMAP(p), state, NULL)))
+        return NULL;
+
+    return prop->key;
+}
+
+char *pa_proplist_to_string(pa_proplist *p) {
+    const char *key;
+    void *state = NULL;
+    pa_strbuf *buf;
+
+    pa_assert(p);
+
+    buf = pa_strbuf_new();
+
+    while ((key = pa_proplist_iterate(p, &state))) {
+
+        const char *v;
+
+        if ((v = pa_proplist_gets(p, key)))
+            pa_strbuf_printf(buf, "%s = \"%s\"\n", key, v);
+        else {
+            const void *value;
+            size_t nbytes;
+            char *c;
+
+            pa_assert_se(pa_proplist_get(p, key, &value, &nbytes) == 0);
+            c = pa_xnew(char, nbytes*2+1);
+            pa_hexstr((const uint8_t*) value, nbytes, c, nbytes*2+1);
+
+            pa_strbuf_printf(buf, "%s = hex:%s\n", key, c);
+            pa_xfree(c);
+        }
+    }
+
+    return pa_strbuf_tostring_free(buf);
+}