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#ifndef _SF_H
#define _SF_H
/* sf.h */
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
#ifndef FALSE
#define FALSE 0
#endif
#ifndef TRUE
#define TRUE 1
#endif
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
typedef enum
{
c_VERSION = 'V',
c_VIEW_GEOMETRY = 'v',
c_CONTROL_GEOMETRY = 'c',
c_MINIMIZE = 'm',
c_SIZE = 'z',
c_SYMMETRY = 'y',
c_EDGES = 'e',
c_COLOUR_SCHEME = 'r',
c_BANDING = 'b',
c_CENTRE = 't',
c_NAME = 'n',
c_KEY = 'k',
c_LIST = 'l',
c_SPEED = 's',
c_GENERATION = 'g',
c_LOOP = 'p'
} command_option_e;
#define COMMAND_OPTIONS ( ( sizeof( long_options ) \
/ sizeof( struct option ) ) - 1 )
extern char short_options[];
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
typedef enum
{
cmd_NULL = 0,
cmd_PING,
cmd_PONG,
cmd_GENERATE,
cmd_VIEW,
cmd_ACK,
cmd_TIMEOUT,
cmd_CLOSE,
cmd_QUIT
} snowflake_cmd;
#define SNOWFLAKE_CMD_LEN sizeof( snowflake_cmd )
/* image generation key length */
#define MAX_KEY ( 16 * sizeof( int ) )
#define GENERATE_CMD_FORMAT "%s,%d,%d,%d,%d,%d,%d"
#define MAX_GENERATE_CMD_LEN (MAX_KEY+1+1+1+1+1+1+1+1+1+1+1+1)
#define GENERATE_SCAN_FORMAT "%[0-9A-F],%d,%d,%d,%d,%d,%d"
#define GENERATE_SCAN_FORMAT_NL "%[0-9A-F],%d,%d,%d,%d,%d,%d%[ \t\n]"
#define VIEW_CMD_FORMAT "%s,%d,%d"
#define MAX_VIEW_CMD_LEN (MAX_KEY+1+1+1+1)
#define VIEW_SCAN_FORMAT "%[0-9A-F],%d,%d"
#define MAX_MSG_DATA_LEN 128
/* MAX_MSG_DATA_LEN must be >= MAX_GENERATE_CMD_LEN */
/* MAX_MSG_DATA_LEN must be >= MAX_VIEW_CMD_LEN */
typedef struct
{
snowflake_cmd cmd;
union
{
int i;
char s[MAX_MSG_DATA_LEN+1];
} data;
} snowflake_message;
#define SNOWFLAKE_MSG_LEN sizeof( snowflake_message )
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
/* defines */
typedef struct
{
int snd;
int rcv;
} msg_pipe;
/* pipe read/write indices */
#define MP_READ 0
#define MP_WRITE 1
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
/* shared memory creation flags */
#define IFLAGS (IPC_CREAT|IPC_EXCL)
#ifndef SHM_RW
#define SHM_RW 0600
#endif
/* keys will have the following form:
*
* kkkkkkkk 32 bits
* iiiiii.. process = id << 8 (id*256)
* ......t. type: { semaphore,shared memory }
* .......d data: { generation message,view message, image data }
*/
#define KEY_SHIFT 8
#define SEM_KEY 0x0010
#define SHM_KEY 0x0020
#define GENERATION_SUBKEY 0x0001
#define VIEW_SUBKEY 0x0002
#define IMAGE_SUBKEY 0x0004
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
#define BLACK_PIXEL 'x'
#define BLACK_COLOUR_NAME "black"
#define GRAY_PIXEL '-'
#define GRAY_COLOUR_NAME "gray"
#define WHITE_PIXEL ' '
#define WHITE_COLOUR_NAME "white"
#define COLOURS 3
#define IMAGE_SPEC_LINE 0
#define IMAGE_SPEC_FORMAT "%3d %3d %1d %1d"
#define MAX_SPEC_LEN (3+1+3+1+1+1+1 + 1)
#define COLOURS_SPEC_LINE 1
#define COLOURS_SPEC_FORMAT "%1c c %-32s m %-32s"
#define MAX_COLOURS_LEN ((1+1+1+1+32+1+1+1+32 + 1) * COLOURS)
#define MAX_HEADER_LEN (MAX_SPEC_LEN + MAX_COLOURS_LEN)
#define IMAGE_DATA_LINE (COLOURS_SPEC_LINE+COLOURS)
#define IMAGE_DATA_OFFSET MAX_HEADER_LEN
#define MAX_IMAGE_SIZE 513
#define MAX_IMAGE_WIDTH MAX_IMAGE_SIZE
#define MAX_IMAGE_HEIGHT MAX_IMAGE_SIZE
#define MAX_IMAGE_LEN (MAX_IMAGE_HEIGHT*(MAX_IMAGE_WIDTH + 1))
#define MAX_IMAGE_DATA_LINES (IMAGE_DATA_LINE + MAX_IMAGE_HEIGHT)
#define MAX_IMAGE_DATA_LEN (MAX_HEADER_LEN + MAX_IMAGE_LEN)
#define MAX_IMAGE_DATA_PTRS (MAX_IMAGE_DATA_LINES * sizeof( char* ))
/* first line index of image data */
#define FIRST_IMAGE_DATA_LINE (COLOURS+1)
typedef struct
{
char* line[MAX_IMAGE_DATA_LINES];
char data[MAX_IMAGE_DATA_LEN];
int size; /* == width (== height) */
} image_data;
#define MAX_IMAGE_DATA_SIZE (sizeof( image_data ))
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
/* size setting */
typedef enum
{
size_032x032 = 0,
size_064x064 = 1,
size_128x128 = 2,
size_256x256 = 3,
size_512x512 = 4
} size_e;
#define SIZES 5
/* symmetry setting */
typedef enum
{
symmetry_VERTICAL = 0,
symmetry_HORIZONTAL = 1
} symmetry_e;
#define SYMMETRIES 2
/* edges setting */
typedef enum
{
edges_NO = 0,
edges_GRAY = 1,
edges_GRAY_SOLID = 2,
edges_YES = 3
} edges_e;
#define EDGES 4
/* loop setting */
typedef enum
{
loop_ONCE = 0,
loop_REPEAT = 1
} loop_e;
#define LOOPS 2
/* colour scheme setting */
typedef enum
{
colour_scheme_WHITE_ON_BLACK = 0,
colour_scheme_BLACK_ON_WHITE = 1
} colour_scheme_e;
#define COLOUR_SCHEMES 2
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
/* prototypes */
void sem_wait( int sem_id );
int sem_signal( int sem_id );
int is_alive( int parent_pid );
int snd_msg( msg_pipe mp,snowflake_message* sf_msg_p );
int rcv_msg( msg_pipe mp,snowflake_message* sf_msg_p );
int get_image_size ( size_e size );
void write_image_header ( char* data,int size );
void write_image_pixel ( char* data,int x,int y,char pixel );
int write_image_to_file( char* data,char* filespec,char* key );
/* main processes */
void generation_main( int argc,
char* argv[],
msg_pipe control,
int image_semid,
char* image );
void view_main( int argc,
char* argv[],
msg_pipe control,
int image_semid,
char* image );
void control_main( int argc,
char* argv[],
msg_pipe generation,
msg_pipe view,
int image_semid,
char* image );
/* ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ */
#endif /* _SF_H */
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