improve string handling

server.c

@@ -266,7 +266,7 @@ int jb_server_client_process_message(struct jb_server *s, int i, uint8_t *data,
 
                 printf("assigned unique name '%s' to connection %d\n", s->names[unique_name_index].name, i);
             } else if (strcmp(member, "RequestName") == 0) {
-                char *name = TRYPTR(wire_get_string(&ctx, NULL));
+                char *name = TRYPTR(wire_get_string(&ctx));
                 int name_len = strlen(name);
                 if (name_len < 1 || name_len > 256) {
                     return -1;
@@ -293,7 +293,7 @@ int jb_server_client_process_message(struct jb_server *s, int i, uint8_t *data,
                     printf("client '%s' (index=%d) now owns name '%s'\n", s->names[client->unique_name_index].name, i, name_str);
                 }
             } else if (strcmp(member, "GetNameOwner") == 0) {
-                char *name = TRYPTR(wire_get_string(&ctx, NULL));
+                char *name = TRYPTR(wire_get_string(&ctx));
                 int name_len = strlen(name);
                 if (name_len < 1 || name_len > 256) {
                     return -1;
@@ -311,7 +311,7 @@ int jb_server_client_process_message(struct jb_server *s, int i, uint8_t *data,
                     TRYPTR(wire_set_string(&reply_ctx, s->names[target->unique_name_index].name));
                 } _reply_end()
             } else if (strcmp(member, "NameHasOwner") == 0) {
-                char *name = TRYPTR(wire_get_string(&ctx, NULL));
+                char *name = TRYPTR(wire_get_string(&ctx));
                 int name_len = strlen(name);
                 if (name_len < 1 || name_len > 256) {
                     return -1;
@@ -351,7 +351,7 @@ int jb_server_client_process_message(struct jb_server *s, int i, uint8_t *data,
             } else if (strcmp(member, "StartServiceByName") == 0) {
                 // TODO: stub (does nothing and always returns success)
 
-                char *name = TRYPTR(wire_get_string(&ctx, NULL));
+                char *name = TRYPTR(wire_get_string(&ctx));
                 int name_len = strlen(name);
                 if (name_len < 1 || name_len > 256) {
                     return -1;
@@ -487,7 +487,6 @@ int jb_server_turn(struct jb_server *s)
                 fprintf(stderr, "jb_server_turn: error: got POLLERR for sock_fd\n");
                 return -1;
             }
-            fprintf(stderr, "jb_server_turn: warn: got POLLERR for fds[%d], removing...\n", i);
             jb_server_client_remove(s, i);
             continue;
         }

wire.c

@@ -48,11 +48,13 @@ _WIRE_DEF_TYPE(i32, int32_t, 4);
 _WIRE_DEF_TYPE(u32, uint32_t, 4);
 _WIRE_DEF_TYPE(boolean, uint32_t, 4);
 
-char *wire_get_string(wire_context_t *c, uint32_t *out_len)
+char *wire_get_string_impl(wire_context_t *c, bool as_signature)
 {
-    uint32_t len = *(uint32_t*)TRYPTR_NIL(wire_get_u32(c));
+    uint32_t len = 0;
-    if (out_len) {
+    if (as_signature) {
-        *out_len = len;
+        len = *(uint8_t*)TRYPTR_NIL(wire_get_u8(c));
+    } else {
+        len = *(uint32_t*)TRYPTR_NIL(wire_get_u32(c));
     }
 
     uint32_t new_cursor = c->byte_cursor + len + 1; /* + 1 because of the extra null termination that strings have */
@@ -67,48 +69,14 @@ char *wire_get_string(wire_context_t *c, uint32_t *out_len)
     return str;
 }
 
-char *wire_set_string(wire_context_t *c, const char *str)
+char *wire_set_string_impl(wire_context_t *c, const char *str, bool as_signature)
 {
     uint32_t len = strlen(str);
-    TRYPTR_NIL(wire_set_u32(c, len));
+    if (as_signature) {
-
-    uint32_t new_cursor = c->byte_cursor + len + 1; /* + 1 because of the extra null termination that strings have */
-    if (new_cursor >= c->data_len) {
-        return NULL;
-    }
-
-    // TODO?
-    char *dest = (char*)&c->data[c->byte_cursor];
-    memcpy(dest, str, len + 1);
-
-    c->byte_cursor = new_cursor; 
-
-    return dest;
-}
-
-char *wire_get_signature(wire_context_t *c, uint8_t *out_len)
-{
-    uint8_t len = *(uint8_t*)TRYPTR_NIL(wire_get_u8(c));
-    if (out_len) {
-        *out_len = len;
-    }
-
-    uint32_t new_cursor = c->byte_cursor + len + 1; /* + 1 because of the extra null termination that strings have */
-    if (new_cursor >= c->data_len) {
-        return NULL;
-    }
-
-    char *str = (char *)&c->data[c->byte_cursor];
-
-    c->byte_cursor = new_cursor; 
-
-    return str;
-}
-
-char *wire_set_signature(wire_context_t *c, const char *str)
-{
-    uint8_t len = strlen(str);
         TRYPTR_NIL(wire_set_u8(c, len));
+    } else {
+        TRYPTR_NIL(wire_set_u32(c, len));
+    }
 
     uint32_t new_cursor = c->byte_cursor + len + 1; /* + 1 because of the extra null termination that strings have */
     if (new_cursor >= c->data_len) {
@@ -146,19 +114,19 @@ int wire_parse_message(wire_context_t *c, wire_message_t *msg)
 
     while (c->byte_cursor < header_fields_end) {
         uint8_t field_code = *(uint8_t*)TRYPTR(wire_get_u8(c));
-        TRYPTR(wire_get_signature(c, NULL));
+        TRYPTR(wire_get_signature(c));
 
         switch (field_code) {
             case DBUS_HEADER_FIELD_PATH: /* through */
             case DBUS_HEADER_FIELD_INTERFACE: /* through */
             case DBUS_HEADER_FIELD_MEMBER: /* through */
             case DBUS_HEADER_FIELD_DESTINATION: {
-                char *str = TRYPTR(wire_get_string(c, NULL));
+                char *str = TRYPTR(wire_get_string(c));
                 WIRE_VERBOSE("field: %s\n", str);
                 msg->fields[field_code].t.str = str;
             } break;
             case DBUS_HEADER_FIELD_SIGNATURE: {
-                char *str = TRYPTR(wire_get_signature(c, NULL));
+                char *str = TRYPTR(wire_get_signature(c));
                 WIRE_VERBOSE("field: %s\n", str);
                 msg->fields[field_code].t.str = str;
             } break;

wire.h

@@ -122,13 +122,29 @@ _WIRE_DECL_TYPE(i32, int32_t, 4);
 _WIRE_DECL_TYPE(u32, uint32_t, 4);
 _WIRE_DECL_TYPE(boolean, uint32_t, 4);
 
-char *wire_get_string(wire_context_t *c, uint32_t *out_len);
+
-char *wire_set_string(wire_context_t *c, const char *str);
+char *wire_get_string_impl(wire_context_t *c, bool as_signature);
-char *wire_get_signature(wire_context_t *c, uint8_t *out_len);
+char *wire_set_string_impl(wire_context_t *c, const char *str, bool as_signature);
-char *wire_set_signature(wire_context_t *c, const char *str);
 int wire_parse_message(wire_context_t *c, wire_message_t *msg);
 int wire_compose_reply(wire_context_t *c, wire_message_t *msg, const char *signature, uint32_t **out_body_length);
 int wire_compose_error(wire_context_t *c, wire_message_t *msg, const char *error_name);
 int wire_compose_unicast_reply(wire_context_t *c, wire_context_t *msg_c, wire_message_t *msg, char *sender_unique_name);
 
+static inline char *wire_get_signature(wire_context_t *c) {
+    return wire_get_string_impl(c, true);
+}
+
+static inline char *wire_set_signature(wire_context_t *c, const char *str) {
+    return wire_set_string_impl(c, str, true);
+}
+
+static inline char *wire_get_string(wire_context_t *c) {
+    return wire_get_string_impl(c, false);
+}
+
+static inline char *wire_set_string(wire_context_t *c, const char *str) {
+    return wire_set_string_impl(c, str, false);
+}
+
+
 #endif // _JITTERBUG__WIRE_H