Edit
kc3-lang/libxkbcommon/src/context.c
Ran Benita
- src/context.c
-
/* * 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; 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; }; /** * 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; } /** * 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->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; }