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Add client side demarshalling for events.

Browse source 
This also consolidates the marshalling code in connection.c and
uses the same functions in the server and client for marshalling.
This commit is contained in:
Kristian Høgsberg 2008-12-24 19:30:25 -05:00
parent fabd4395ba
commit b3131d9268
7 changed files with 321 additions and 311 deletions
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144
connection.c
View file

@ -26,6 +26,8 @@
#include <stdio.h>
#include <errno.h>
#include <sys/uio.h>
#include <ffi.h>
#include <assert.h>
#include "wayland-util.h"
#include "connection.h"
@ -218,3 +220,145 @@ wl_connection_write(struct wl_connection *connection, const void *data, size_t c
WL_CONNECTION_WRITABLE,
connection->data);
}
void
wl_connection_vmarshal(struct wl_connection *connection,
struct wl_object *sender,
uint32_t opcode, va_list ap,
const struct wl_message *message)
{
struct wl_object *object;
uint32_t args[32], length, *p, size;
const char *s;
int i, count;
count = strlen(message->signature);
assert(count <= ARRAY_LENGTH(args));
p = &args[2];
for (i = 0; i < count; i++) {
switch (message->signature[i]) {
case 'u':
case 'i':
*p++ = va_arg(ap, uint32_t);
break;
case 's':
s = va_arg(ap, const char *);
length = strlen(s);
*p++ = length;
memcpy(p, s, length);
p += DIV_ROUNDUP(length, sizeof(*p));
break;
case 'o':
case 'n':
object = va_arg(ap, struct wl_object *);
*p++ = object->id;
break;
default:
assert(0);
break;
}
}
size = (p - args) * sizeof *p;
args[0] = sender->id;
args[1] = opcode | (size << 16);
wl_connection_write(connection, args, size);
}
void
wl_connection_demarshal(struct wl_connection *connection,
uint32_t size,
struct wl_hash *objects,
void (*func)(void),
void *data, struct wl_object *target,
const struct wl_message *message)
{
ffi_type *types[20];
ffi_cif cif;
uint32_t *p, result, length;
int i, count;
union {
uint32_t uint32;
char *string;
void *object;
uint32_t new_id;
} values[20];
void *args[20];
struct wl_object *object;
uint32_t buffer[64];
count = strlen(message->signature) + 2;
if (count > ARRAY_LENGTH(types)) {
printf("too many args (%d)\n", count);
return;
}
if (sizeof buffer < size) {
printf("request too big, should malloc tmp buffer here\n");
return;
}
types[0] = &ffi_type_pointer;
values[0].object = data;
args[0] = &values[0];
types[1] = &ffi_type_pointer;
values[1].object = target;
args[1] = &values[1];
wl_connection_copy(connection, buffer, size);
p = &buffer[2];
for (i = 2; i < count; i++) {
switch (message->signature[i - 2]) {
case 'u':
case 'i':
types[i] = &ffi_type_uint32;
values[i].uint32 = *p++;
break;
case 's':
types[i] = &ffi_type_pointer;
length = *p++;
values[i].string = malloc(length + 1);
if (values[i].string == NULL) {
/* FIXME: Send NO_MEMORY */
return;
}
memcpy(values[i].string, p, length);
values[i].string[length] = '\0';
p += DIV_ROUNDUP(length, sizeof *p);
break;
case 'o':
types[i] = &ffi_type_pointer;
object = wl_hash_lookup(objects, *p);
if (object == NULL)
printf("unknown object (%d)\n", *p);
values[i].object = object;
p++;
break;
case 'n':
types[i] = &ffi_type_uint32;
values[i].new_id = *p;
object = wl_hash_lookup(objects, *p);
if (object != NULL)
printf("object already exists (%d)\n", *p);
p++;
break;
default:
printf("unknown type\n");
break;
}
args[i] = &values[i];
}
ffi_prep_cif(&cif, FFI_DEFAULT_ABI, count, &ffi_type_uint32, types);
ffi_call(&cif, func, &result, args);
for (i = 2; i < count; i++) {
switch (message->signature[i - 2]) {
case 's':
free(values[i].string);
break;
}
}
}