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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>
#define IS_IN_RANGE(value, begin, length) ((value) >= (begin) && (value) < (begin) + (length))
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;
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;
}
static int register_extension(xcb_errors_context_t *ctx, xcb_connection_t *conn, const char *ext)
{
struct extension_info_t *info;
struct static_extension_info_t static_info;
xcb_query_extension_reply_t *reply;
char *ext_dup;
ext_dup = strdup(ext);
info = calloc(1, sizeof(*info));
reply = xcb_query_extension_reply(conn,
xcb_query_extension(conn, strlen(ext), ext), NULL);
static_info = find_static_info_for_extension(ext);
if (!info || !reply || !ext_dup || !reply->present || (static_info.num_minor == 0)) {
free(info);
free(reply);
free(ext_dup);
/* This is used to indicate an unsupported extension */
if (static_info.num_minor == 0)
return 0;
return -1;
}
info->name = ext_dup;
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;
xcb_list_extensions_reply_t *reply = NULL;
xcb_str_iterator_t iter;
if ((*c = calloc(1, sizeof(*c))) == NULL)
goto error_out;
ctx = *c;
ctx->extensions = NULL;
reply = xcb_list_extensions_reply(conn,
xcb_list_extensions(conn), NULL);
if (!reply)
goto error_out;
// TODO: Make this do all the query_extension requests first and then
// collect the results. Less roundtrips.
iter = xcb_list_extensions_names_iterator(reply);
while (iter.rem > 0) {
int status = register_extension(ctx, conn, xcb_str_name(iter.data));
if (status < 0)
goto error_out;
xcb_str_next(&iter);
}
free(reply);
return 0;
error_out:
free(reply);
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->name);
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;
const char *result = xproto_get_name_for_major_code(major_code);
if (result)
return result;
while (info && info->major_opcode != major_code)
info = info->next;
if (info == NULL)
return get_strings_entry(unknown_major_code, 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 *info = ctx->extensions;
const char *result = xproto_get_name_for_event(event_code);
if (result)
return result;
while (info && !IS_IN_RANGE(event_code, info->first_event, info->static_info.num_events))
info = info->next;
if (info == NULL)
return get_strings_entry(unknown_event_code, event_code);
return get_strings_entry(info->static_info.strings_events, event_code - info->first_event);
}
const char *xcb_errors_get_name_for_error(xcb_errors_context_t *ctx,
uint8_t error_code)
{
struct extension_info_t *info = ctx->extensions;
const char *result = xproto_get_name_for_error(error_code);
if (result)
return result;
while (info && !IS_IN_RANGE(error_code, info->first_error, info->static_info.num_errors))
info = info->next;
if (info == NULL)
return get_strings_entry(unknown_error_code, error_code);
return get_strings_entry(info->static_info.strings_errors, error_code - info->first_error);
}
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