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/* ply-utils.h - random useful functions and macros
*
* Copyright (C) 2007 Red Hat, Inc.
*
* This program is free software; you can redistribute it and/or modify
* it under the terms of the GNU General Public License as published by
* the Free Software Foundation; either version 2, or (at your option)
* any later version.
*
* This program is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
* GNU General Public License for more details.
*
* You should have received a copy of the GNU General Public License
* along with this program; if not, write to the Free Software
* Foundation, Inc., 59 Temple Place - Suite 330, Boston, MA
* 02111-1307, USA.
*
* Written By: Ray Strode <rstrode@redhat.com>
*/
#ifndef PLY_UTILS_H
#define PLY_UTILS_H
#include <stdint.h>
#include <stdbool.h>
#include <unistd.h>
#include <sys/types.h>
#ifndef MIN
#define MIN(a, b) ((a) <= (b) ? (a) : (b))
#endif
#ifndef MAX
#define MAX(a, b) ((a) >= (b) ? (a) : (b))
#endif
#ifndef CLAMP
#define CLAMP(a, b, c) (MIN (MAX ((a), (b)), (c)))
#endif
#define PLY_NUMBER_OF_ELEMENTS(arr) (sizeof(arr) / sizeof((arr)[0]))
#define PLY_UTF8_CHARACTER_SIZE_MAX 4
typedef intptr_t ply_module_handle_t;
typedef void (*ply_module_function_t) (void);
typedef intptr_t ply_daemon_handle_t;
typedef enum
{
PLY_UNIX_SOCKET_TYPE_CONCRETE = 0,
PLY_UNIX_SOCKET_TYPE_ABSTRACT,
PLY_UNIX_SOCKET_TYPE_TRIMMED_ABSTRACT
} ply_unix_socket_type_t;
typedef enum
{
PLY_UTF8_CHARACTER_BYTE_TYPE_CONTINUATION = -2,
PLY_UTF8_CHARACTER_BYTE_TYPE_INVALID = -1,
PLY_UTF8_CHARACTER_BYTE_TYPE_END_OF_STRING = 0,
PLY_UTF8_CHARACTER_BYTE_TYPE_1_BYTE = 1,
PLY_UTF8_CHARACTER_BYTE_TYPE_2_BYTES = 2,
PLY_UTF8_CHARACTER_BYTE_TYPE_3_BYTES = 3,
PLY_UTF8_CHARACTER_BYTE_TYPE_4_BYTES = 4
} ply_utf8_character_byte_type_t;
#define PLY_UTF8_CHARACTER_BYTE_TYPE_IS_NOT_LEADING(t) ((t) == PLY_UTF8_CHARACTER_BYTE_TYPE_INVALID || (t) == PLY_UTF8_CHARACTER_BYTE_TYPE_CONTINUATION)
#define PLY_UTF8_CHARACTER_BYTE_TYPE_IS_MULTI_BYTE(t) (((t) == PLY_UTF8_CHARACTER_BYTE_TYPE_2_BYTES || (t) == PLY_UTF8_CHARACTER_BYTE_TYPE_3_BYTES || (t) == PLY_UTF8_CHARACTER_BYTE_TYPE_4_BYTES))
typedef struct
{
const char *string;
ssize_t character_range;
ssize_t current_byte_offset;
ssize_t number_characters_iterated;
} ply_utf8_string_iterator_t;
#ifndef PLY_HIDE_FUNCTION_DECLARATIONS
#define ply_round_to_multiple(n, m) (((n) + (((m) - 1))) & ~((m) - 1))
bool ply_open_unidirectional_pipe (int *sender_fd,
int *receiver_fd);
int ply_connect_to_unix_socket (const char *path,
ply_unix_socket_type_t type);
int ply_listen_to_unix_socket (const char *path,
ply_unix_socket_type_t type);
bool ply_get_credentials_from_fd (int fd,
pid_t *pid,
uid_t *uid,
gid_t *gid);
bool ply_write (int fd,
const void *buffer,
size_t number_of_bytes);
bool ply_write_uint32 (int fd,
uint32_t value);
bool ply_read (int fd,
void *buffer,
size_t number_of_bytes);
bool ply_read_uint32 (int fd,
uint32_t *value);
bool ply_fd_has_data (int fd);
bool ply_set_fd_as_blocking (int fd);
char **ply_copy_string_array (const char *const *array);
void ply_free_string_array (char **array);
bool ply_string_has_prefix (const char *str,
const char *prefix);
double ply_get_timestamp (void);
void ply_save_errno (void);
void ply_restore_errno (void);
bool ply_directory_exists (const char *dir);
bool ply_file_exists (const char *file);
bool ply_character_device_exists (const char *device);
ply_module_handle_t *ply_open_module (const char *module_path);
ply_module_handle_t *ply_open_built_in_module (void);
ply_module_function_t ply_module_look_up_function (ply_module_handle_t *handle,
const char *function_name);
void ply_close_module (ply_module_handle_t *handle);
bool ply_create_directory (const char *directory);
bool ply_create_file_link (const char *source,
const char *destination);
void ply_show_new_kernel_messages (bool should_show);
ply_daemon_handle_t *ply_create_daemon (void);
bool ply_detach_daemon (ply_daemon_handle_t *handle,
int exit_code);
ply_utf8_character_byte_type_t ply_utf8_character_get_byte_type (const char byte);
ssize_t ply_utf8_character_get_size_from_byte_type (ply_utf8_character_byte_type_t byte_type);
ssize_t ply_utf8_character_get_size (const char *bytes);
void ply_utf8_string_remove_last_character (char **string,
size_t *n);
int ply_utf8_string_get_length (const char *string,
size_t n);
size_t ply_utf8_string_get_byte_offset_from_character_offset (const char *string,
size_t character_offset);
void ply_utf8_string_iterator_initialize (ply_utf8_string_iterator_t *iterator,
const char *string,
ssize_t starting_offset,
ssize_t range);
bool ply_utf8_string_iterator_next (ply_utf8_string_iterator_t *iterator,
const char **character,
size_t *size);
char *ply_get_process_command_line (pid_t pid);
pid_t ply_get_process_parent_pid (pid_t pid);
void ply_set_device_scale (int device_scale);
int ply_get_device_scale (uint32_t width,
uint32_t height,
uint32_t width_mm,
uint32_t height_mm);
int ply_guess_device_scale (uint32_t width,
uint32_t height);
void ply_get_kmsg_log_levels (int *current_log_level,
int *default_log_level);
const char *ply_kernel_command_line_get_string_after_prefix (const char *prefix);
bool ply_kernel_command_line_has_argument (const char *argument);
void ply_kernel_command_line_override (const char *command_line);
char *ply_kernel_command_line_get_key_value (const char *key);
double ply_strtod (const char *str);
bool ply_is_secure_boot_enabled (void);
long ply_get_random_number (long lower_bound, long range);
bool ply_change_to_vt_with_fd (int vt_number,
int tty_fd);
bool ply_change_to_vt (int vt_number);
#endif
#endif /* PLY_UTILS_H */
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