Add libxkbcommon to 3rd party libs

This library is required by the XCB platform plugin. As we depend on
very recent version of this library and it might not be available
in base repositories of distributions, users can use -qt-xkbcommom
switch to build Qt with the bundled version.

Change-Id: I0ed2a5cc2f1df98b0e7cc926cabfa69818674e08
Reviewed-by: Samuel Rødal <samuel.rodal@digia.com>

1 files changed, 492 insertions, 0 deletions

diff --git a/src/3rdparty/xkbcommon/src/context.c b/src/3rdparty/xkbcommon/src/context.c
new file mode 100644
index 0000000000..8d56487004
--- /dev/null
+++ b/src/3rdparty/xkbcommon/src/context.c
@@ -0,0 +1,492 @@
+/*
+ * Copyright © 2012 Intel Corporation
+ * Copyright © 2012 Ran Benita
+ *
+ * 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 (including the next
+ * paragraph) 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 OR COPYRIGHT HOLDERS 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.
+ *
+ * Author: Daniel Stone <daniel@fooishbar.org>
+ */
+
+#include <sys/types.h>
+#include <sys/stat.h>
+#include <ctype.h>
+#include <errno.h>
+#include <unistd.h>
+
+#include "xkbcommon/xkbcommon.h"
+#include "utils.h"
+#include "context.h"
+
+struct xkb_context {
+    int refcnt;
+
+    ATTR_PRINTF(3, 0) void (*log_fn)(struct xkb_context *ctx,
+                                     enum xkb_log_level level,
+                                     const char *fmt, va_list args);
+    enum xkb_log_level log_level;
+    int log_verbosity;
+    void *user_data;
+
+    struct xkb_rule_names names_dflt;
+
+    darray(char *) includes;
+    darray(char *) failed_includes;
+
+    struct atom_table *atom_table;
+
+    /* Buffer for the *Text() functions. */
+    char text_buffer[2048];
+    size_t text_next;
+
+    unsigned int use_environment_names : 1;
+};
+
+/**
+ * Append one directory to the context's include path.
+ */
+XKB_EXPORT int
+xkb_context_include_path_append(struct xkb_context *ctx, const char *path)
+{
+    struct stat stat_buf;
+    int err;
+    char *tmp;
+
+    tmp = strdup(path);
+    if (!tmp)
+        goto err;
+
+    err = stat(path, &stat_buf);
+    if (err != 0)
+        goto err;
+    if (!S_ISDIR(stat_buf.st_mode))
+        goto err;
+
+#if defined(HAVE_EACCESS)
+    if (eaccess(path, R_OK | X_OK) != 0)
+        goto err;
+#elif defined(HAVE_EUIDACCESS)
+    if (euidaccess(path, R_OK | X_OK) != 0)
+        goto err;
+#endif
+
+    darray_append(ctx->includes, tmp);
+    return 1;
+
+err:
+    darray_append(ctx->failed_includes, tmp);
+    return 0;
+}
+
+/**
+ * Append the default include directories to the context.
+ */
+XKB_EXPORT int
+xkb_context_include_path_append_default(struct xkb_context *ctx)
+{
+    const char *home;
+    char *user_path;
+    int err;
+    int ret = 0;
+
+    ret |= xkb_context_include_path_append(ctx, DFLT_XKB_CONFIG_ROOT);
+
+    home = getenv("HOME");
+    if (!home)
+        return ret;
+    err = asprintf(&user_path, "%s/.xkb", home);
+    if (err <= 0)
+        return ret;
+    ret |= xkb_context_include_path_append(ctx, user_path);
+    free(user_path);
+
+    return ret;
+}
+
+/**
+ * Remove all entries in the context's include path.
+ */
+XKB_EXPORT void
+xkb_context_include_path_clear(struct xkb_context *ctx)
+{
+    char **path;
+
+    darray_foreach(path, ctx->includes)
+        free(*path);
+    darray_free(ctx->includes);
+
+    darray_foreach(path, ctx->failed_includes)
+        free(*path);
+    darray_free(ctx->failed_includes);
+}
+
+/**
+ * xkb_context_include_path_clear() + xkb_context_include_path_append_default()
+ */
+XKB_EXPORT int
+xkb_context_include_path_reset_defaults(struct xkb_context *ctx)
+{
+    xkb_context_include_path_clear(ctx);
+    return xkb_context_include_path_append_default(ctx);
+}
+
+/**
+ * Returns the number of entries in the context's include path.
+ */
+XKB_EXPORT unsigned int
+xkb_context_num_include_paths(struct xkb_context *ctx)
+{
+    return darray_size(ctx->includes);
+}
+
+unsigned int
+xkb_context_num_failed_include_paths(struct xkb_context *ctx)
+{
+    return darray_size(ctx->failed_includes);
+}
+
+/**
+ * Returns the given entry in the context's include path, or NULL if an
+ * invalid index is passed.
+ */
+XKB_EXPORT const char *
+xkb_context_include_path_get(struct xkb_context *ctx, unsigned int idx)
+{
+    if (idx >= xkb_context_num_include_paths(ctx))
+        return NULL;
+
+    return darray_item(ctx->includes, idx);
+}
+
+const char *
+xkb_context_failed_include_path_get(struct xkb_context *ctx,
+                                    unsigned int idx)
+{
+    if (idx >= xkb_context_num_failed_include_paths(ctx))
+        return NULL;
+
+    return darray_item(ctx->failed_includes, idx);
+}
+
+/**
+ * Take a new reference on the context.
+ */
+XKB_EXPORT struct xkb_context *
+xkb_context_ref(struct xkb_context *ctx)
+{
+    ctx->refcnt++;
+    return ctx;
+}
+
+/**
+ * Drop an existing reference on the context, and free it if the refcnt is
+ * now 0.
+ */
+XKB_EXPORT void
+xkb_context_unref(struct xkb_context *ctx)
+{
+    if (!ctx || --ctx->refcnt > 0)
+        return;
+
+    xkb_context_include_path_clear(ctx);
+    atom_table_free(ctx->atom_table);
+    free(ctx);
+}
+
+static const char *
+log_level_to_prefix(enum xkb_log_level level)
+{
+    switch (level) {
+    case XKB_LOG_LEVEL_DEBUG:
+        return "Debug:";
+    case XKB_LOG_LEVEL_INFO:
+        return "Info:";
+    case XKB_LOG_LEVEL_WARNING:
+        return "Warning:";
+    case XKB_LOG_LEVEL_ERROR:
+        return "Error:";
+    case XKB_LOG_LEVEL_CRITICAL:
+        return "Critical:";
+    default:
+        return NULL;
+    }
+}
+
+ATTR_PRINTF(3, 0) static void
+default_log_fn(struct xkb_context *ctx, enum xkb_log_level level,
+               const char *fmt, va_list args)
+{
+    const char *prefix = log_level_to_prefix(level);
+
+    if (prefix)
+        fprintf(stderr, "%-10s", prefix);
+    vfprintf(stderr, fmt, args);
+}
+
+static enum xkb_log_level
+log_level(const char *level) {
+    char *endptr;
+    enum xkb_log_level lvl;
+
+    errno = 0;
+    lvl = strtol(level, &endptr, 10);
+    if (errno == 0 && (endptr[0] == '\0' || isspace(endptr[0])))
+        return lvl;
+    if (istreq_prefix("crit", level))
+        return XKB_LOG_LEVEL_CRITICAL;
+    if (istreq_prefix("err", level))
+        return XKB_LOG_LEVEL_ERROR;
+    if (istreq_prefix("warn", level))
+        return XKB_LOG_LEVEL_WARNING;
+    if (istreq_prefix("info", level))
+        return XKB_LOG_LEVEL_INFO;
+    if (istreq_prefix("debug", level) || istreq_prefix("dbg", level))
+        return XKB_LOG_LEVEL_DEBUG;
+
+    return XKB_LOG_LEVEL_ERROR;
+}
+
+static int
+log_verbosity(const char *verbosity) {
+    char *endptr;
+    int v;
+
+    errno = 0;
+    v = strtol(verbosity, &endptr, 10);
+    if (errno == 0)
+        return v;
+
+    return 0;
+}
+
+#ifndef DEFAULT_XKB_VARIANT
+#define DEFAULT_XKB_VARIANT NULL
+#endif
+
+#ifndef DEFAULT_XKB_OPTIONS
+#define DEFAULT_XKB_OPTIONS NULL
+#endif
+
+/**
+ * Create a new context.
+ */
+XKB_EXPORT struct xkb_context *
+xkb_context_new(enum xkb_context_flags flags)
+{
+    const char *env;
+    struct xkb_context *ctx = calloc(1, sizeof(*ctx));
+
+    if (!ctx)
+        return NULL;
+
+    ctx->refcnt = 1;
+    ctx->log_fn = default_log_fn;
+    ctx->log_level = XKB_LOG_LEVEL_ERROR;
+    ctx->log_verbosity = 0;
+
+    /* Environment overwrites defaults. */
+    env = getenv("XKB_LOG_LEVEL");
+    if (env)
+        xkb_context_set_log_level(ctx, log_level(env));
+
+    env = getenv("XKB_LOG_VERBOSITY");
+    if (env)
+        xkb_context_set_log_verbosity(ctx, log_verbosity(env));
+
+    if (!(flags & XKB_CONTEXT_NO_DEFAULT_INCLUDES) &&
+        !xkb_context_include_path_append_default(ctx)) {
+        log_err(ctx, "failed to add default include path %s\n",
+                DFLT_XKB_CONFIG_ROOT);
+        xkb_context_unref(ctx);
+        return NULL;
+    }
+
+    ctx->use_environment_names = !(flags & XKB_CONTEXT_NO_ENVIRONMENT_NAMES);
+
+    ctx->atom_table = atom_table_new();
+    if (!ctx->atom_table) {
+        xkb_context_unref(ctx);
+        return NULL;
+    }
+
+    return ctx;
+}
+
+xkb_atom_t
+xkb_atom_lookup(struct xkb_context *ctx, const char *string)
+{
+    return atom_lookup(ctx->atom_table, string);
+}
+
+xkb_atom_t
+xkb_atom_intern(struct xkb_context *ctx, const char *string)
+{
+    return atom_intern(ctx->atom_table, string, false);
+}
+
+xkb_atom_t
+xkb_atom_steal(struct xkb_context *ctx, char *string)
+{
+    return atom_intern(ctx->atom_table, string, true);
+}
+
+char *
+xkb_atom_strdup(struct xkb_context *ctx, xkb_atom_t atom)
+{
+    return atom_strdup(ctx->atom_table, atom);
+}
+
+const char *
+xkb_atom_text(struct xkb_context *ctx, xkb_atom_t atom)
+{
+    return atom_text(ctx->atom_table, atom);
+}
+
+void
+xkb_log(struct xkb_context *ctx, enum xkb_log_level level,
+        const char *fmt, ...)
+{
+    va_list args;
+
+    va_start(args, fmt);
+    ctx->log_fn(ctx, level, fmt, args);
+    va_end(args);
+}
+
+XKB_EXPORT void
+xkb_context_set_log_fn(struct xkb_context *ctx,
+                       void (*log_fn)(struct xkb_context *ctx,
+                                      enum xkb_log_level level,
+                                      const char *fmt, va_list args))
+{
+    ctx->log_fn = (log_fn ? log_fn : default_log_fn);
+}
+
+XKB_EXPORT enum xkb_log_level
+xkb_context_get_log_level(struct xkb_context *ctx)
+{
+    return ctx->log_level;
+}
+
+XKB_EXPORT void
+xkb_context_set_log_level(struct xkb_context *ctx, enum xkb_log_level level)
+{
+    ctx->log_level = level;
+}
+
+XKB_EXPORT int
+xkb_context_get_log_verbosity(struct xkb_context *ctx)
+{
+    return ctx->log_verbosity;
+}
+
+XKB_EXPORT void
+xkb_context_set_log_verbosity(struct xkb_context *ctx, int verbosity)
+{
+    ctx->log_verbosity = verbosity;
+}
+
+XKB_EXPORT void *
+xkb_context_get_user_data(struct xkb_context *ctx)
+{
+    if (ctx)
+        return ctx->user_data;
+    return NULL;
+}
+
+XKB_EXPORT void
+xkb_context_set_user_data(struct xkb_context *ctx, void *user_data)
+{
+    ctx->user_data = user_data;
+}
+
+char *
+xkb_context_get_buffer(struct xkb_context *ctx, size_t size)
+{
+    char *rtrn;
+
+    if (size >= sizeof(ctx->text_buffer))
+        return NULL;
+
+    if (sizeof(ctx->text_buffer) - ctx->text_next <= size)
+        ctx->text_next = 0;
+
+    rtrn = &ctx->text_buffer[ctx->text_next];
+    ctx->text_next += size;
+
+    return rtrn;
+}
+
+const char *
+xkb_context_get_default_rules(struct xkb_context *ctx)
+{
+    const char *env = NULL;
+
+    if (ctx->use_environment_names)
+        env = getenv("XKB_DEFAULT_RULES");
+
+    return env ? env : DEFAULT_XKB_RULES;
+}
+
+const char *
+xkb_context_get_default_model(struct xkb_context *ctx)
+{
+    const char *env = NULL;
+
+    if (ctx->use_environment_names)
+        env = getenv("XKB_DEFAULT_MODEL");
+
+    return env ? env : DEFAULT_XKB_MODEL;
+}
+
+const char *
+xkb_context_get_default_layout(struct xkb_context *ctx)
+{
+    const char *env = NULL;
+
+    if (ctx->use_environment_names)
+        env = getenv("XKB_DEFAULT_LAYOUT");
+
+    return env ? env : DEFAULT_XKB_LAYOUT;
+}
+
+const char *
+xkb_context_get_default_variant(struct xkb_context *ctx)
+{
+    const char *env = NULL;
+    const char *layout = getenv("XKB_DEFAULT_VARIANT");
+
+    /* We don't want to inherit the variant if they haven't also set a
+     * layout, since they're so closely paired. */
+    if (layout && ctx->use_environment_names)
+        env = getenv("XKB_DEFAULT_VARIANT");
+
+    return env ? env : DEFAULT_XKB_VARIANT;
+}
+
+const char *
+xkb_context_get_default_options(struct xkb_context *ctx)
+{
+    const char *env = NULL;
+
+    if (ctx->use_environment_names)
+        env = getenv("XKB_DEFAULT_OPTIONS");
+
+    return env ? env : DEFAULT_XKB_OPTIONS;
+}