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/* Copyright © 2015 Uli Schlachter
*
* Permission is hereby granted, free of charge, to any person obtaining a
* copy of this software and associated documentation files (the "Software"),
* to deal in the Software without restriction, including without limitation
* the rights to use, copy, modify, merge, publish, distribute, sublicense,
* and/or sell copies of the Software, and to permit persons to whom the
* Software is furnished to do so, subject to the following conditions:
*
* The above copyright notice and this permission notice shall be included in
* all copies or substantial portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS OR
* IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF MERCHANTABILITY,
* FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT. IN NO EVENT SHALL THE
* AUTHORS BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
*
* Except as contained in this notice, the names of the authors or their
* institutions shall not be used in advertising or otherwise to promote the
* sale, use or other dealings in this Software without prior written
* authorization from the authors.
*/
#include "xcb_errors.h"
#include "errors.h"
#include <stdlib.h>
#include <string.h>
struct extension_info_t {
struct extension_info_t *next;
struct static_extension_info_t static_info;
uint8_t major_opcode;
uint8_t first_event;
uint8_t first_error;
const char *name;
};
struct xcb_errors_context_t {
struct extension_info_t *extensions;
};
static const char *get_strings_entry(const char *strings, unsigned int index) {
while (index-- > 0)
strings += strlen(strings) + 1;
return strings;
}
int register_extension(xcb_errors_context_t *ctx, xcb_connection_t *conn,
xcb_query_extension_cookie_t cookie, const char *name,
const struct static_extension_info_t static_info)
{
struct extension_info_t *info;
xcb_query_extension_reply_t *reply;
info = calloc(1, sizeof(*info));
reply = xcb_query_extension_reply(conn, cookie, NULL);
if (!info || !reply || !reply->present) {
int had_error = !reply || reply->present;
free(info);
free(reply);
if (had_error)
return -1;
return 0;
}
info->name = name;
info->static_info = static_info;
info->major_opcode = reply->major_opcode;
info->first_event = reply->first_event;
info->first_error = reply->first_error;
info->next = ctx->extensions;
ctx->extensions = info;
free(reply);
return 0;
}
int xcb_errors_context_new(xcb_connection_t *conn, xcb_errors_context_t **c)
{
xcb_errors_context_t *ctx = NULL;
if ((*c = calloc(1, sizeof(*c))) == NULL)
goto error_out;
ctx = *c;
ctx->extensions = NULL;
if (register_extensions(ctx, conn) != 0)
goto error_out;
return 0;
error_out:
xcb_errors_context_free(ctx);
*c = NULL;
return -1;
}
void xcb_errors_context_free(xcb_errors_context_t *ctx)
{
struct extension_info_t *info;
if (ctx == NULL)
return;
info = ctx->extensions;
while (info) {
struct extension_info_t *prev = info;
info = info->next;
free(prev);
}
free(ctx);
}
const char *xcb_errors_get_name_for_major_code(xcb_errors_context_t *ctx,
uint8_t major_code)
{
struct extension_info_t *info = ctx->extensions;
while (info && info->major_opcode != major_code)
info = info->next;
if (info == NULL)
return get_strings_entry(xproto_info.strings_minor, major_code);
return info->name;
}
const char *xcb_errors_get_name_for_minor_code(xcb_errors_context_t *ctx,
uint8_t major_code,
uint16_t minor_code)
{
struct extension_info_t *info = ctx->extensions;
while (info && info->major_opcode != major_code)
info = info->next;
if (info == NULL || minor_code >= info->static_info.num_minor)
return NULL;
return get_strings_entry(info->static_info.strings_minor, minor_code);
}
const char *xcb_errors_get_name_for_event(xcb_errors_context_t *ctx,
uint8_t event_code)
{
struct extension_info_t *best = NULL;
struct extension_info_t *next = ctx->extensions;
/* Find the extension with the largest first_event <= event_code. Thanks
* to this we do the right thing if the server only supports an older
* version of some extension which had less events.
*/
while (next) {
struct extension_info_t *current = next;
next = next->next;
if (current->first_event > event_code)
continue;
if (best != NULL && best->first_event > current->first_event)
continue;
best = current;
}
if (best == NULL || best->first_event == 0)
/* Nothing found */
return get_strings_entry(xproto_info.strings_events, event_code);
return get_strings_entry(best->static_info.strings_events, event_code - best->first_event);
}
const char *xcb_errors_get_name_for_error(xcb_errors_context_t *ctx,
uint8_t error_code)
{
struct extension_info_t *best = NULL;
struct extension_info_t *next = ctx->extensions;
/* Find the extension with the largest first_error <= error_code. Thanks
* to this we do the right thing if the server only supports an older
* version of some extension which had less events.
*/
while (next) {
struct extension_info_t *current = next;
next = next->next;
if (current->first_error > error_code)
continue;
if (best != NULL && best->first_error > current->first_error)
continue;
best = current;
}
if (best == NULL || best->first_error == 0)
/* Nothing found */
return get_strings_entry(xproto_info.strings_errors, error_code);
return get_strings_entry(best->static_info.strings_errors, error_code - best->first_error);
}
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