eet.h(3)

NAME

Eet.h - The file that provides the eet functions.

SYNOPSIS

Defines
    #define EET_T_UNKNOW   0
        Unknown data encoding type.
    #define EET_T_CHAR   1
        Data type: char.
    #define EET_T_SHORT   2
        Data type: short.
    #define EET_T_INT   3
        Data type: int.
    #define EET_T_LONG_LONG   4
        Data type: long long.
    #define EET_T_FLOAT   5
        Data type: float.
    #define EET_T_DOUBLE   6
        Data type: double.
    #define EET_T_UCHAR   7
        Data type: unsigned char.
    #define EET_T_USHORT   8
        Data type: unsigned short.
    #define EET_T_UINT   9
        Data type: unsigned int.
    #define EET_T_ULONG_LONG   10
        Data type: unsigned long long.
    #define EET_T_STRING   11
        Data type: char *.
    #define EET_T_INLINED_STRING   12
        Data type: char * (but compressed inside the resulting
eet).
    #define EET_T_LAST   13
        Last data type.
    #define EET_G_UNKNOWN   100
        Unknown group data encoding type.
    #define EET_G_ARRAY   101
        Fixed size array group type.
    #define EET_G_VAR_ARRAY   102
        Variable size array group type.
    #define EET_G_LIST   103
        Linked list group type.
    #define EET_G_HASH   104
        Hash table group type.
    #define EET_G_LAST   105
        Last group type.
    #define   EET_DATA_DESCRIPTOR_ADD_BASIC(edd,  struct_type,
name, member,
        type)
        Add a basic data element to a data descriptor.
    #define   EET_DATA_DESCRIPTOR_ADD_SUB(edd,    struct_type,
name, member,
        subtype)
        Add a sub-element type to a data descriptor.
    #define   EET_DATA_DESCRIPTOR_ADD_LIST(edd,   struct_type,
name, member,
        subtype)
        Add a linked list type to a data descriptor.
    #define   EET_DATA_DESCRIPTOR_ADD_HASH(edd,   struct_type,
name, member,
        subtype)
        Add a hash type to a data descriptor.
Functions
    EAPI int eet_init (void)
        Initialize the EET library.
    EAPI int eet_shutdown (void)
        Shut down the EET library.
    EAPI void eet_clearcache (void)
        Clear eet cache.
    EAPI  Eet_File * eet_open (const char *file, Eet_File_Mode
mode)
        Open an eet file on disk, and returns a handle to  it.
    EAPI Eet_File_Mode eet_mode_get (Eet_File *ef)
        Get the mode an Eet_File was opened with.
    EAPI Eet_Error eet_close (Eet_File *ef)
        Close an eet file handle and flush and writes pending.
    EAPI Eet_Dictionary * eet_dictionary_get (Eet_File *ef)
        Return a handle to the shared string dictionary of the
Eet file.
    EAPI  int eet_dictionary_string_check (Eet_Dictionary *ed,
const char
        *string)
        Check if a given string comes from a given dictionary.
    EAPI  void * eet_read (Eet_File *ef, const char *name, int
*size_ret)
        Read a specified entry from an  eet  file  and  return
data.
    EAPI  const  void  *  eet_read_direct (Eet_File *ef, const
char *name, int
        *size_ret)
        Read a specified entry from an  eet  file  and  return
data.
    EAPI  int eet_write (Eet_File *ef, const char *name, const
void *data,
        int size, int compress)
        Write a specified entry to an eet file handle.
    EAPI int eet_delete (Eet_File *ef, const char *name)
        Delete a  specified  entry  from  an  Eet  file  being
written or re        written.
    EAPI char ** eet_list (Eet_File *ef, const char *glob, int
*count_ret)
        List all entries in eet file matching shell glob.
    EAPI int eet_num_entries (Eet_File *ef)
        Return the number of  entries  in  the  specified  eet
file.
    EAPI  int  eet_data_image_header_read (Eet_File *ef, const
char *name,
        unsigned int *w, unsigned  int  *h,  int  *alpha,  int
*compress, int
        *quality, int *lossy)
        Read just the header data for an image and dont decode
the pixels.
    EAPI void * eet_data_image_read (Eet_File *ef, const  char
*name,
        unsigned  int  *w,  unsigned  int  *h, int *alpha, int
*compress, int
        *quality, int *lossy)
        Read image data from the named key in the eet file.
    EAPI int eet_data_image_write (Eet_File  *ef,  const  char
*name, const
        void *data, unsigned int w, unsigned int h, int alpha,
int
        compress, int quality, int lossy)
        Write image data to the named key in an eet file.
    EAPI int eet_data_image_header_decode (const  void  *data,
int size,
        unsigned  int  *w,  unsigned  int  *h, int *alpha, int
*compress, int
        *quality, int *lossy)
        Decode Image data header only to get information.
    EAPI void * eet_data_image_decode (const void  *data,  int
size, unsigned
        int  *w,  unsigned  int *h, int *alpha, int *compress,
int *quality,
        int *lossy)
        Decode Image data into pixel data.
    EAPI void * eet_data_image_encode (const void  *data,  int
*size_ret,
        unsigned  int  w,  unsigned int h, int alpha, int compress, int
        quality, int lossy)
        Encode image data for storage or transmission.
    EAPI Eet_Data_Descriptor * eet_data_descriptor_new  (const
char *name,
        int size, void *(*func_list_next)(void *l), void
        *(*func_list_append)(void *l, void *d), void
        *(*func_list_data)(void            *l),           void
*(*func_list_free)(void *l),
        void(*func_hash_foreach)(void *h, int(*func)(void  *h,
const char
        *k,   void   *dt,   void   *fdt),   void  *fdt),  void
*(*func_hash_add)(void
        *h,      const      char      *k,      void       *d),
void(*func_hash_free)(void *h))
        Create a new empty data structure descriptor.
    EAPI  void  eet_data_descriptor_free  (Eet_Data_Descriptor
*edd)
        This function frees a data descriptor when it  is  not
needed
        anymore.
    EAPI  void  eet_data_descriptor_element_add  (Eet_Data_Descriptor *edd,
        const char *name, int type, int group_type,  int  offset, int count,
        const  char  *counter_name,  Eet_Data_Descriptor *subtype)
        This function is an internal used by macros.
    EAPI void * eet_data_read (Eet_File *ef, Eet_Data_Descriptor *edd,
        const char *name)
        Read a data structure from an eet file and decodes it.
    EAPI int eet_data_write (Eet_File *ef, Eet_Data_Descriptor
*edd, const
        char *name, const void *data, int compress)
        Write a data structure from memory and store in an eet
file.
    EAPI int  eet_data_text_dump  (const  void  *data_in,  int
size_in,
        void(*dumpfunc)(void  *data,  const  char  *str), void
*dumpdata)
        Dump an eet encoded data structure into ascii text.
    EAPI void * eet_data_text_undump (const  char  *text,  int
textlen, int
        *size_ret)
        Take  an  ascii encoding from eet_data_text_dump() and
re-encode in
        binary.
    EAPI int eet_data_dump (Eet_File *ef, const char *name,
        void(*dumpfunc)(void *data,  const  char  *str),  void
*dumpdata)
        Dump  an  eet  encoded data structure from an eet file
into ascii
        text.
    EAPI int eet_data_undump (Eet_File *ef, const char  *name,
const char
        *text, int textlen, int compress)
        Take   an  ascii  encoding  from  eet_data_dump()  and
re-encode in
        binary.
    EAPI       void        *        eet_data_descriptor_decode
(Eet_Data_Descriptor *edd, const
        void *data_in, int size_in)
        Decode  a  data structure from an arbitary location in
memory.
    EAPI       void        *        eet_data_descriptor_encode
(Eet_Data_Descriptor *edd, const
        void *data_in, int *size_ret)
        Encode  a  dsata  struct  to  memory  and  return that
encoded data.

Detailed Description

The file that provides the eet functions.

This header provides the Eet management functions.

Define Documentation

#define EET_DATA_DESCRIPTOR_ADD_BASIC(edd, struct_type, name,
member, type): Value:; { struct_type ___ett; eet_data_descriptor_ele; ment_add(edd, name, type, EET_G_UNKNOWN, (char; *)(&(___ett.member)) - (char *)(&(___ett)), 0, NULL,; NULL); }
Add a basic data element to a data descriptor.; Parameters:
edd The data descriptor to add the type to.
struct_type The type of the struct.
name The string name to use to encode/decode this mem

ber (must be a
constant global and never change).
member The struct member itself to be encoded.
type The type of the member to encode.; This macro is a convenience macro provided to add a member; to the data
descriptor edd. The type of the structure is provided as; the
struct_type parameter (for example: struct my_struct). The; name
parameter defines a string that will be used to uniquely; name that
member of the struct (it is suggested to use the struct; member itself).
The member parameter is the actual struct member itself; (for
eet_dictionary_string_check * example: values), and type; is the basic
data type of the member which must be one of: EET_T_CHAR,; EET_T_SHORT,
EET_T_INT, EET_T_LONG_LONG, EET_T_FLOAT, EET_T_DOUBLE,; EET_T_UCHAR,
EET_T_USHORT, EET_T_UINT, EET_T_ULONG_LONG or; EET_T_STRING.; Since:
1.0.0
#define EET_DATA_DESCRIPTOR_ADD_HASH(edd, struct_type, name,
member,: subtype)
Value:; { struct_type ___ett; eet_data_descriptor_ele; ment_add(edd, name, EET_T_UNKNOW, EET_G_HASH, (char; *)(&(___ett.member)) - (char *)(&(___ett)), 0, NULL,; subtype); }
Add a hash type to a data descriptor.; Parameters:
edd The data descriptor to add the type to.
struct_type The type of the struct.
name The string name to use to encode/decode this mem

ber (must be a
constant global and never change).
member The struct member itself to be encoded.
subtype The type of hash member to add.; This macro lets you easily add a hash of other data types.; All the
parameters are the same as for

EET_DATA_DESCRIPTOR_ADD_BASIC()

the subtype being the exception. This must be the data de
scriptor of the element that is in each member of the hash to be
stored.
Since:: 1.0.0
#define EET_DATA_DESCRIPTOR_ADD_LIST(edd, struct_type, name,
member,: subtype)
Value:; { struct_type ___ett; eet_data_descriptor_ele; ment_add(edd, name, EET_T_UNKNOW, EET_G_LIST, (char; *)(&(___ett.member)) - (char *)(&(___ett)), 0, NULL,; subtype); }
Add a linked list type to a data descriptor.; Parameters:
edd The data descriptor to add the type to.
struct_type The type of the struct.
name The string name to use to encode/decode this mem

ber (must be a
constant global and never change).
member The struct member itself to be encoded.
subtype The type of linked list member to add.; This macro lets you easily add a linked list of other data; types. All
the parameters are the same as for

EET_DATA_DESCRIPTOR_ADD_BASIC()

with the subtype being the exception. This must be the da
ta descriptor of the element that is in each member of the linked list
to be stored.
Since:: 1.0.0
#define EET_DATA_DESCRIPTOR_ADD_SUB(edd, struct_type, name,
member,: subtype)
Value:; { struct_type ___ett; eet_data_descriptor_ele; ment_add(edd, name, EET_T_UNKNOW, EET_G_UNKNOWN, (char; *)(&(___ett.member)) - (char *)(&(___ett)), 0, NULL,; subtype); }
Add a sub-element type to a data descriptor.; Parameters:
edd The data descriptor to add the type to.
struct_type The type of the struct.
name The string name to use to encode/decode this mem

ber (must be a
constant global and never change).
member The struct member itself to be encoded.
subtype The type of sub-type struct to add.; This macro lets you easily add a sub-type (a struct that's; pointed to
by this one). All the parameters are the same as for
EET_DATA_DESCRIPTOR_ADD_BASIC(), with the subtype being; the exception.
This must be the data descriptor of the struct that is; pointed to by
this element.; Since:
1.0.0

Function Documentation

EAPI void eet_clearcache (void): Clear eet cache.; Eet didn't free items by default. If you are under memory; presure, just
call this function to recall all memory that are not yet; referenced
anymore. The cache take care of modification on disk.; Since:
1.0.0
EAPI Eet_Error eet_close (Eet_File * ef): Close an eet file handle and flush and writes pending.; Parameters:
ef A valid eet file handle.; This function will flush any pending writes to disk if the; eet file was
opened for write, and free all data associated with the; file handle and
file, and close the file.; If the eet file handle is not valid nothing will be done.; Since:
1.0.0
EAPI void* eet_data_descriptor_decode (Eet_Data_Descriptor *
edd, const: void * data_in, int size_in) Decode a data structure from an arbitary location in memo; ry.; Parameters:
edd The data descriptor to use when decoding.
data_in The pointer to the data to decode into a

struct.
size_in The size of the data pointed to in bytes.; Returns:
NULL on failure, or a valid decoded struct pointer on

success.; This function will decode a data structure that has been; encoded using
eet_data_descriptor_encode(), and return a data structure; with all its
elements filled out, if successful, or NULL on failure.; The data to be decoded is stored at the memory pointed to; by data_in,
and is described by the descriptor pointed to by edd. The; data size is
passed in as the value to size_in, ande must be greater; than 0 to
succeed.; This function is useful for decoding data structures de; livered to the
application by means other than an eet file, such as an; IPC or socket
connection, raw files, shared memory etc.; Please see eet_data_read() for more information.; Since:
1.0.0
EAPI void eet_data_descriptor_element_add (Eet_Data_Descriptor
* edd, const: char * name, int type, int group_type, int offset, int; count, const
char * counter_name, Eet_Data_Descriptor * subtype) This function is an internal used by macros.; This function is used by macros

EET_DATA_DESCRIPTOR_ADD_BASIC()

EET_DATA_DESCRIPTOR_ADD_SUB() and

EET_DATA_DESCRIPTOR_ADD_LIST()

complex to use by hand and should be left to be used by
the macros, and thus is not documented.
Since:: 1.0.0
EAPI void* eet_data_descriptor_encode (Eet_Data_Descriptor *
edd, const: void * data_in, int * size_ret) Encode a dsata struct to memory and return that encoded; data.; Parameters:
edd The data descriptor to use when encoding.
data_in The pointer to the struct to encode into data. size_ret A pointer to the an int to be filled with the

decoded
size.; Returns:
NULL on failure, or a valid encoded data chunk on suc

cess.; This function takes a data structutre in memory and en; codes it into a
serialised chunk of data that can be decoded again by
eet_data_descriptor_decode(). This is useful for being; able to transmit
data structures across sockets, pipes, IPC or shared file; mechanisms,
without having to worry about memory space, machine type,; endianess
etc.; The parameter edd must point to a valid data descriptor,; and data_in
must point to the right data structure to encode. If not,; the encoding
may fail.; On success a non NULL valid pointer is returned and what; size_ret
points to is set to the size of this decoded data, in; bytes. When the
encoded data is no longer needed, call free() on it. On; failure NULL is
returned and what size_ret points to is set to 0.; Please see eet_data_write() for more information.; Since:
1.0.0
EAPI void eet_data_descriptor_free (Eet_Data_Descriptor * edd): This function frees a data descriptor when it is not need; ed anymore.; Parameters:
edd The data descriptor to free.; This function takes a data descriptor handle as a parame; ter and frees
all data allocated for the data descriptor and the handle; itself. After
this call the descriptor is no longer valid.; Since:
1.0.0
EAPI Eet_Data_Descriptor* eet_data_descriptor_new (const char
* name, int: size, void *(*)(void *l) func_list_next, void *(*)(void; *l, void *d)
func_list_append, void *(*)(void *l) func_list_data, void; *(*)(void *l)
func_list_free, void(*)(void *h, int(*func)(void *h, const; char *k,
void *dt, void *fdt), void *fdt) func_hash_foreach, void; *(*)(void *h,
const char *k, void *d) func_hash_add, void(*)(void *h); func_hash_free)
Create a new empty data structure descriptor.; Parameters:
name The string name of this data structure (most be a

global
constant and never change).
size The size of the struct (in bytes).
func_list_next The function to get the next list node. func_list_append The function to append a member to a

list.
func_list_data The function to get the data from a

list node.
func_list_free The function to free an entire linked

list.
func_hash_foreach The function to iterate through all

hash table
entries.
func_hash_add The function to add a member to a hash

table.
func_hash_free The function to free an entire hash ta

ble.; Returns:
A new empty data descriptor.; This function creates a new data descriptore and returns a; handle to
the new data descriptor. On creation it will be empty,; containing no
contents describing anything other than the shell of the; data
structure.; You add structure members to the data descriptor using the; macros
EET_DATA_DESCRIPTOR_ADD_BASIC(),

EET_DATA_DESCRIPTOR_ADD_SUB()

EET_DATA_DESCRIPTOR_ADD_LIST(), depending on what type of
member you are adding to the description.
Once you have described all the members of a struct you
want loaded, or saved eet can load and save those members for you, encode
them into endian-independant serialised data chunks for transmission
across a a network or more.
The function pointers to the list and hash table functions
are only needed if you use those data types, else you can pass NULL
instead.
Example:: #include <Eet.h>
#include <Evas.h>; typedef struct _blah2
{
char *string;; }
Blah2;; typedef struct _blah3
{
char *string;; }
Blah3;; typedef struct _blah
{
char character;
short sixteen;
int integer;
long long lots;
float floating;
double floating_lots;
char *string;
Blah2 *blah2;
Evas_List *blah3;; }
Blah;; int
main(int argc, char **argv)
{
Blah blah;
Blah2 blah2;
Blah3 blah3;
Eet_Data_Descriptor *edd, *edd2, *edd3;
void *data;
int size;
FILE *f;
Blah *blah_in;

edd3 = eet_data_descriptor_new('blah3', sizeof(Blah3),
evas_list_next,
evas_list_append,
evas_list_data,
evas_list_free,
evas_hash_foreach,
evas_hash_add,
evas_hash_free);

EET_DATA_DESCRIPTOR_ADD_BASIC(edd3, Blah3, 'string3',

string, EET_T_STRING);

edd2 = eet_data_descriptor_new('blah2', sizeof(Blah2),

evas_list_next,
evas_list_append,
evas_list_data,
evas_list_free,
evas_hash_foreach,
evas_hash_add,
evas_hash_free);

EET_DATA_DESCRIPTOR_ADD_BASIC(edd2, Blah2, 'string2',

string, EET_T_STRING);

edd = eet_data_descriptor_new('blah', sizeof(Blah),

evas_list_next,
evas_list_append,
evas_list_data,
evas_list_free,
evas_hash_foreach,
evas_hash_add,
evas_hash_free);

EET_DATA_DESCRIPTOR_ADD_BASIC(edd, Blah, 'character',

character, EET_T_CHAR);
EET_DATA_DESCRIPTOR_ADD_BASIC(edd, Blah, 'sixteen',

sixteen, EET_T_SHORT);
EET_DATA_DESCRIPTOR_ADD_BASIC(edd, Blah, 'integer',

integer, EET_T_INT);
EET_DATA_DESCRIPTOR_ADD_BASIC(edd, Blah, 'lots', lots,

EET_T_LONG_LONG);
EET_DATA_DESCRIPTOR_ADD_BASIC(edd, Blah, 'floating',

floating, EET_T_FLOAT);
EET_DATA_DESCRIPTOR_ADD_BASIC(edd, Blah, 'float

ing_lots', floating_lots, EET_T_DOUBLE);
EET_DATA_DESCRIPTOR_ADD_BASIC(edd, Blah, 'string',

string, EET_T_STRING);
EET_DATA_DESCRIPTOR_ADD_SUB(edd, Blah, 'blah2', blah2,

edd2);
EET_DATA_DESCRIPTOR_ADD_LIST(edd, Blah, 'blah3',

blah3, edd3);

blah3.string='PANTS';

blah2.string='subtype string here!';

blah.character='7';
blah.sixteen=0x7777;
blah.integer=0xc0def00d;
blah.lots=0xdeadbeef31337777;
blah.floating=3.141592654;
blah.floating_lots=0.777777777777777;
blah.string='bite me like a turnip';
blah.blah2 = &blah2;
blah.blah3 = evas_list_append(NULL, &blah3);
blah.blah3 = evas_list_append(blah.blah3, &blah3);
blah.blah3 = evas_list_append(blah.blah3, &blah3);
blah.blah3 = evas_list_append(blah.blah3, &blah3);
blah.blah3 = evas_list_append(blah.blah3, &blah3);
blah.blah3 = evas_list_append(blah.blah3, &blah3);
blah.blah3 = evas_list_append(blah.blah3, &blah3);

data = eet_data_descriptor_encode(edd, &blah, &size);
printf('-----DECODING0);
blah_in = eet_data_descriptor_decode(edd, data, size);

printf('-----DECODED!0);
printf('%c0, blah_in->character);
printf('%x0, (int)blah_in->sixteen);
printf('%x0, blah_in->integer);
printf('%lx0, blah_in->lots);
printf('%f0, (double)blah_in->floating);
printf('%f0, (double)blah_in->floating_lots);
printf('%s0, blah_in->string);
printf('%p0, blah_in->blah2);
printf(' %s0, blah_in->blah2->string);

{
Evas_List *l;

for (l = blah_in->blah3; l; l = l->next)
{
Blah3 *blah3_in;

blah3_in = l->data;
printf('%p0, blah3_in);
printf(' %s0, blah3_in->string);

}

}

eet_data_descriptor_free(edd);
eet_data_descriptor_free(edd2);
eet_data_descriptor_free(edd3);

return 0;; }
Since:: 1.0.0
EAPI int eet_data_dump (Eet_File * ef, const char * name,
void(*)(void: *data, const char *str) dumpfunc, void * dumpdata) Dump an eet encoded data structure from an eet file into; ascii text.; Parameters:
ef A valid eet file handle.
name Name of the entry. eg: '/base/file_i_want'.
dumpfunc The function to call passed a string when new

data is
converted to text
dumpdata The data to pass to the dumpfunc callback.; Returns:
1 on success, 0 on failure; This function will take an open and valid eet file from; eet_open()
request the data encoded by eet_data_descriptor_encode(); corresponding
to the key name and convert it into human readable ascii; text. It does
this by calling the dumpfunc callback for all new text; that is
generated. This callback should append to any existing; text buffer and
will be passed the pointer dumpdata as a parameter as well; as a string
with new text to be appended.; Since:
1.0.0
EAPI void* eet_data_image_decode (const void * data, int size,
unsigned int: * w, unsigned int * h, int * alpha, int * compress, int *; quality, int
* lossy)
Decode Image data into pixel data.; Parameters:
data The encoded pixel data.
size The size, in bytes, of the encoded pixel data.
w A pointer to the unsigned int to hold the width in

pixels.
h A pointer to the unsigned int to hold the height in

pixels.
alpha A pointer to the int to hold the alpha flag.
compress A pointer to the int to hold the compression

amount.
quality A pointer to the int to hold the quality

amount.
lossy A pointer to the int to hold the lossiness flag.; Returns:
The image pixel data decoded; This function takes encoded pixel data and decodes it into; raw RGBA
pixels on success.; The other parameters of the image (width, height etc.) are; placed into
the values pointed to (they must be supplied). The pixel; data is a
linear array of pixels starting from the top-left of the; image scanning
row by row from left to right. Each pixel is a 32bit val; ue, with the
high byte being the alpha channel, the next being red,; then green, and
the low byte being blue. The width and height are measured; in pixels
and will be greater than 0 when returned. The alpha flag; is either 0 or
1. 0 denotes that the alpha channel is not used. 1 denotes
that it is significant. Compress is filled with the compression val
ue/amount the image was stored with. The quality value is filled with
the quality encoding of the image file (0 - 100). The lossy flags is
either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns a pointer to the image da
ta decoded. The calling application is responsible for calling free()
on the image data when it is done with it. On failure NULL is returned
and the parameter values may not contain any sensible data.
Since:
1.0.0
EAPI void* eet_data_image_encode (const void * data, int *
size_ret,
unsigned int w, unsigned int h, int alpha, int compress,
int quality,
int lossy)
Encode image data for storage or transmission.
Parameters:
data A pointer to the image pixel data.
size_ret A pointer to an int to hold the size of the
returned data. w The width of the image in pixels. h The height of the image in pixels. alpha The alpha channel flag. compress The compression amount. quality The quality encoding amount. lossy The lossiness flag.
Returns:
The encoded image data.
This function stakes image pixel data and encodes it with
compression and possible loss of quality (as a trade off for size) for
storage or transmission to another system.
The data expected is the same format as returned by eet_data_image_read. If this is not the case weird things
may happen. Width and height must be between 1 and 8000 pixels. The
alpha flags can be 0 or 1 (0 meaning the alpha values are not useful and 1
meaning they are). Compress can be from 0 to 9 (0 meaning no compres
sion, 9 meaning full compression). This is only used if the image is not
lossily encoded. Quality is used on lossy compression and should
be a value from 0 to 100. The lossy flag can be 0 or 1. 0 means en
code losslessly and 1 means to encode with image quality loss (but then
have a much smaller encoding).
On success this function returns a pointer to the encoded
data that you can free with free() when no longer needed.
Since:
1.0.0
EAPI int eet_data_image_header_decode (const void * data, int
size,
unsigned int * w, unsigned int * h, int * alpha, int *
compress, int *
quality, int * lossy)
Decode Image data header only to get information.
Parameters:
data The encoded pixel data.
size The size, in bytes, of the encoded pixel data.
w A pointer to the unsigned int to hold the width in
pixels. h A pointer to the unsigned int to hold the height in
pixels. alpha A pointer to the int to hold the alpha flag. compress A pointer to the int to hold the compression
amount. quality A pointer to the int to hold the quality
amount. lossy A pointer to the int to hold the lossiness flag.
Returns:
1 on success, 0 on failure.
This function takes encoded pixel data and decodes it into
raw RGBA pixels on success.
The other parameters of the image (width, height etc.) are
placed into the values pointed to (they must be supplied). The pixel
data is a linear array of pixels starting from the top-left of the
image scanning row by row from left to right. Each pixel is a 32bit val
ue, with the high byte being the alpha channel, the next being red,
then green, and the low byte being blue. The width and height are measured
in pixels and will be greater than 0 when returned. The alpha flag
is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes
that it is significant. Compress is filled with the compression val
ue/amount the image was stored with. The quality value is filled with
the quality encoding of the image file (0 - 100). The lossy flags is
either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns 1 indicating the header
was read and decoded properly, or 0 on failure.
Since:
1.0.0
EAPI int eet_data_image_header_read (Eet_File * ef, const char
* name, unsigned int * w, unsigned int * h, int * alpha, int *
compress, int *
quality, int * lossy)
Read just the header data for an image and dont decode the
pixels.
Parameters:
ef A valid eet file handle opened for reading.
name Name of the entry. eg: '/base/file_i_want'.
w A pointer to the unsigned int to hold the width in
pixels. h A pointer to the unsigned int to hold the height in
pixels. alpha A pointer to the int to hold the alpha flag. compress A pointer to the int to hold the compression
amount. quality A pointer to the int to hold the quality
amount. lossy A pointer to the int to hold the lossiness flag.
Returns:
1 on successfull decode, 0 otherwise
This function reads an image from an eet file stored under
the named key in the eet file and return a pointer to the decom
pressed pixel data.
The other parameters of the image (width, height etc.) are
placed into the values pointed to (they must be supplied). The pixel
data is a linear array of pixels starting from the top-left of the
image scanning row by row from left to right. Each pile is a 32bit value,
with the high byte being the alpha channel, the next being red,
then green, and the low byte being blue. The width and height are measured
in pixels and will be greater than 0 when returned. The alpha flag
is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes
that it is significant. Compress is filled with the compression val
ue/amount the image was stored with. The quality value is filled with
the quality encoding of the image file (0 - 100). The lossy flags is
either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns 1 indicating the header
was read and decoded properly, or 0 on failure.
Since:
1.0.0
EAPI void* eet_data_image_read (Eet_File * ef, const char *
name, unsigned
int * w, unsigned int * h, int * alpha, int * compress,
int * quality,
int * lossy)
Read image data from the named key in the eet file.
Parameters:
ef A valid eet file handle opened for reading.
name Name of the entry. eg: '/base/file_i_want'.
w A pointer to the unsigned int to hold the width in
pixels. h A pointer to the unsigned int to hold the height in
pixels. alpha A pointer to the int to hold the alpha flag. compress A pointer to the int to hold the compression
amount. quality A pointer to the int to hold the quality
amount. lossy A pointer to the int to hold the lossiness flag.
Returns:
The image pixel data decoded
This function reads an image from an eet file stored under
the named key in the eet file and return a pointer to the decom
pressed pixel data.
The other parameters of the image (width, height etc.) are
placed into the values pointed to (they must be supplied). The pixel
data is a linear array of pixels starting from the top-left of the
image scanning row by row from left to right. Each pile is a 32bit value,
with the high byte being the alpha channel, the next being red,
then green, and the low byte being blue. The width and height are measured
in pixels and will be greater than 0 when returned. The alpha flag
is either 0 or 1. 0 denotes that the alpha channel is not used. 1 denotes
that it is significant. Compress is filled with the compression val
ue/amount the image was stored with. The quality value is filled with
the quality encoding of the image file (0 - 100). The lossy flags is
either 0 or 1 as to if the image was encoded lossily or not.
On success the function returns a pointer to the image da
ta decoded. The calling application is responsible for calling free()
on the image data when it is done with it. On failure NULL is returned
and the parameter values may not contain any sensible data.
Since:
1.0.0
EAPI int eet_data_image_write (Eet_File * ef, const char *
name, const void
* data, unsigned int w, unsigned int h, int alpha, int
compress, int
quality, int lossy)
Write image data to the named key in an eet file.
Parameters:
ef A valid eet file handle opened for writing.
name Name of the entry. eg: '/base/file_i_want'.
data A pointer to the image pixel data.
w The width of the image in pixels.
h The height of the image in pixels.
alpha The alpha channel flag.
compress The compression amount.
quality The quality encoding amount.
lossy The lossiness flag.
Returns:
Success if the data was encoded and written or not.
This function takes image pixel data and encodes it in an
eet file stored under the supplied name key, and returns how many
bytes were actually written to encode the image data.
The data expected is the same format as returned by eet_data_image_read. If this is not the case weird things
may happen. Width and height must be between 1 and 8000 pixels. The
alpha flags can be 0 or 1 (0 meaning the alpha values are not useful and 1
meaning they are). Compress can be from 0 to 9 (0 meaning no compres
sion, 9 meaning full compression). This is only used if the image is not
lossily encoded. Quality is used on lossy compression and should
be a value from 0 to 100. The lossy flag can be 0 or 1. 0 means en
code losslessly and 1 means to encode with image quality loss (but then
have a much smaller encoding).
On success this function returns the number of bytes that
were required to encode the image data, or on failure it returns 0.
Since:
1.0.0
EAPI void* eet_data_read (Eet_File * ef, Eet_Data_Descriptor *
edd, const
char * name)
Read a data structure from an eet file and decodes it.
Parameters:
ef The eet file handle to read from.
edd The data descriptor handle to use when decoding.
name The key the data is stored under in the eet file.
Returns:
A pointer to the decoded data structure.
This function decodes a data structure stored in an eet
file, returning a pointer to it if it decoded successfully, or NULL on
failure. This can save a programmer dozens of hours of work in writing
configuration file parsing and writing code, as eet does all that work
for the program and presents a program-friendly data structure,
just as the programmer likes. Eet can handle members being added or
deleted from the data in storage and safely zero-fills unfilled members
if they were not found in the data. It checks sizes and headers whenev
er it reads data, allowing the programmer to not worry about corrupt
data.
Once a data structure has been described by the programmer
with the fields they wish to save or load, storing or retrieving a
data structure from an eet file, or from a chunk of memory is
as simple as a single function call.
Since:
1.0.0
EAPI int eet_data_text_dump (const void * data_in, int
size_in,
void(*)(void *data, const char *str) dumpfunc, void *
dumpdata)
Dump an eet encoded data structure into ascii text.
Parameters:
data_in The pointer to the data to decode into a
struct.
size_in The size of the data pointed to in bytes.
dumpfunc The function to call passed a string when new
data is converted to text dumpdata The data to pass to the dumpfunc callback.
Returns:
1 on success, 0 on failure
This function will take a chunk of data encoded by
eet_data_descriptor_encode() and convert it into human
readable ascii text. It does this by calling the dumpfunc callback for
all new text that is generated. This callback should append to any ex
isting text buffer and will be passed the pointer dumpdata as a param
eter as well as a string with new text to be appended.
Example:: void output(void *data, const char *string)
{
printf('%s', string);
}
void dump(const char *file) { FILE *f; int len; void *data;
f = fopen(file, 'r'); fseek(f, 0, SEEK_END); len = ftell(f); rewind(f); data = malloc(len); fread(data, len, 1, f); fclose(f); eet_data_text_dump(data, len, output, NULL);
}
Since:
1.0.0
EAPI void* eet_data_text_undump (const char * text, int
textlen, int *
size_ret)
Take an ascii encoding from eet_data_text_dump() and re
encode in binary.
Parameters:text The pointer to the string data to parse and en
code. textlen The size of the string in bytes (not including
0 byte
terminator).
size_ret This gets filled in with the encoded data
blob size in bytes.
Returns:
The encoded data on success, NULL on failure.
This function will parse the string pointed to by text and
return an encoded data lump the same way
eet_data_descriptor_encode() takes an in-memory data struct and encodes into a binary blob. text
is a normal C string.
Since:
1.0.0
EAPI int eet_data_undump (Eet_File * ef, const char * name,
const char *
text, int textlen, int compress) Take an ascii encoding from eet_data_dump() and re-encode
in binary.
Parameters:
ef A valid eet file handle.
name Name of the entry. eg: '/base/file_i_want'.
text The pointer to the string data to parse and en
code. textlen The size of the string in bytes (not including
0 byte terminator). compress Compression flags (1 == compress, 0 = don't
compress).
Returns:
1 on success, 0 on failure
This function will parse the string pointed to by text,
encode it the
same way eet_data_descriptor_encode() takes an in-memory
data struct and encodes into a binary blob.
The data (optionally compressed) will be in ram, pending a
flush to disk (it will stay in ram till the eet file handle is
closed though).
Since:
1.0.0
EAPI int eet_data_write (Eet_File * ef, Eet_Data_Descriptor *
edd, const
char * name, const void * data, int compress) Write a data structure from memory and store in an eet
file.
Parameters:
ef The eet file handle to write to.
edd The data descriptor to use when encoding.
name The key to store the data under in the eet file.
data A pointer to the data structure to ssave and en
code. compress Compression flags for storage.
Returns:
1 on successful write, 0 on failure.
This function is the reverse of eet_data_read(), saving a
data structure to an eet file.
Since:
1.0.0
EAPI int eet_delete (Eet_File * ef, const char * name) Delete a specified entry from an Eet file being written or
re-written.
Parameters:
ef A valid eet file handle opened for writing.
name Name of the entry. eg: '/base/file_i_want'.
Returns:
Success or failure of the delete.
This function will delete the specified chunk of data from
the eet file and return greater than 0 on success. 0 will be returned
on failure.
The eet file handle must be a valid file handle for an eet
file opened for writing. If it is not, 0 will be returned and no ac
tion will be performed.
Name, must not be NULL, otherwise 0 will be returned.
Since:
1.0.0
EAPI Eet_Dictionary* eet_dictionary_get (Eet_File * ef) Return a handle to the shared string dictionary of the Eet
file.
Parameters:
ef A valid eet file handle.
Returns:
A handle to the dictionary of the file
This function returns a handle to the dictionary of an Eet
file whose handle is ef, if a dictionary exists. NULL is returned
otherwise or if the file handle is known to be invalid.
Since:
1.0.0
EAPI int eet_dictionary_string_check (Eet_Dictionary * ed,
const char *
string)
Check if a given string comes from a given dictionary.
Parameters:
ed A valid dictionary handle
string A valid 0 byte terminated C string
Returns:
1 if it is in the dictionary, 0 otherwise
This checks the given dictionary to see if the given
string is actually inside that dictionary (i.e. comes from it) and returns 1
if it does. If the dictionary handle is invlide, the string is NULL or
the string is not in the dictionary, 0 is returned.
Since:
1.0.0
EAPI int eet_init (void)
Initialize the EET library.
Returns:
The new init count.
Since:
1.0.0
EAPI char** eet_list (Eet_File * ef, const char * glob, int *
count_ret)
List all entries in eet file matching shell glob.
Parameters:
ef A valid eet file handle.
glob A shell glob to match against.
count_ret Number of entries found to match.
Returns:
Pointer to an array of strings.
This function will list all entries in the eet file match
ing the supplied shell glob and return an allocated list of their
names, if there are any, and if no memory errors occur.
The eet file handle must be valid and glob must not be
NULL, or NULL will be returned and count_ret will be filled with 0.
The calling program must call free() on the array re
turned, but NOT on the string pointers in the array. They are taken as read
only internals from the eet file handle. They are only valid as long as
the file handle is not closed. When it is closed those pointers in
the array are now not valid and should not be used.
On success the array returned will have a list of string
pointers that are the names of the entries that matched, and count_ret
will have the number of entries in this array placed in it.
Hint: an easy way to list all entries in an eet file is to
use a glob value of '*'.
Since:
1.0.0
EAPI Eet_File_Mode eet_mode_get (Eet_File * ef) Get the mode an Eet_File was opened with.
Parameters:
ef A valid eet file handle.
Returns:
The mode ef was opened with.
Since:
1.0.0
EAPI int eet_num_entries (Eet_File * ef) Return the number of entries in the specified eet file.
Parameters:
ef A valid eet file handle.
Returns:
Number of entries in ef or -1 if the number of entries
cannot be read due to open mode restrictions.
Since:
1.0.0
EAPI Eet_File* eet_open (const char * file, Eet_File_Mode
mode)
Open an eet file on disk, and returns a handle to it.
Parameters:
file The file path to the eet file. eg:
'/tmp/file.eet'. mode The mode for opening. Either EET_FILE_MODE_READ, EET_FILE_MODE_WRITE or EET_FILE_MODE_READ_WRITE.
Returns:
An opened eet file handle.
This function will open an exiting eet file for reading,
and build the directory table in memory and return a handle to the file,
if it exists and can be read, and no memory errors occur on the way,
otherwise NULL will be returned.
It will also open an eet file for writing. This will, if
successful, delete the original file and replace it with a new empty
file, till the eet file handle is closed or flushed. If it cannot be
opened for writing or a memory error occurs, NULL is returned.
You can also open the file for read/write. If you then
write a key that does not exist it will be created, if the key exists it
will be replaced by the new data.
Example:: #include <Eet.h>
#include <stdio.h>; int
main(int argc, char **argv)
{
Eet_File *ef;
char buf[1024], *ret, **list;
int size, num, i;; strcpy(buf, 'Here is a string of data to save!');; ef = eet_open('/tmp/my_file.eet', EET_FILE_MODE_WRITE);
if (!ef) return -1;
if (!eet_write(ef, '/key/to_store/at', buf, 1024, 1))
fprintf(stderr, 'Error writing data!0);
eet_close(ef);
ef = eet_open('/tmp/my_file.eet', EET_FILE_MODE_READ); if (!ef) return -1; list = eet_list(ef, '*', &num); if (list) { for (i = 0; i < num; i++) printf('Key stored: %s0, list[i]);
free(list);
}
ret = eet_read(ef, '/key/to_store/at', &size); if (ret) { printf('Data read (%i bytes):19s0, size, ret); free(ret);
}
eet_close(ef);
return 0;
}
Since:
1.0.0
EAPI void* eet_read (Eet_File * ef, const char * name, int *
size_ret)
Read a specified entry from an eet file and return data.
Parameters:
ef A valid eet file handle opened for reading.
name Name of the entry. eg: '/base/file_i_want'.
size_ret Number of bytes read from entry and returned.
Returns:
The data stored in that entry in the eet file.
This function finds an entry in the eet file that is
stored under the name specified, and returns that data, decompressed, if
successful. NULL is returned if the lookup fails or if memory errors
are encountered. It is the job of the calling program to call
free() on the returned data. The number of bytes in the returned data
chunk are placed in size_ret.
If the eet file handle is not valid NULL is returned and
size_ret is filled with 0.
Since:
1.0.0
EAPI const void* eet_read_direct (Eet_File * ef, const char *
name, int *
size_ret)
Read a specified entry from an eet file and return data.
Parameters:
ef A valid eet file handle opened for reading.
name Name of the entry. eg: '/base/file_i_want'.
size_ret Number of bytes read from entry and returned.
Returns:
The data stored in that entry in the eet file.
This function finds an entry in the eet file that is
stored under the name specified, and returns that data if not compressed
and successful. NULL is returned if the lookup fails or if memory errors
are encountered or if the data is comrpessed. The calling pro
gram must never call free() on the returned data. The number of
bytes in the returned data chunk are placed in size_ret.
If the eet file handle is not valid NULL is returned and
size_ret is filled with 0.
Since:
1.0.0
EAPI int eet_shutdown (void) Shut down the EET library.
Returns:
The new init count.
Since:
1.0.0
EAPI int eet_write (Eet_File * ef, const char * name, const
void * data,
int size, int compress)
Write a specified entry to an eet file handle.
Parameters:
ef A valid eet file handle opened for writing.
name Name of the entry. eg: '/base/file_i_want'.
data Pointer to the data to be stored.
size Length in bytes in the data to be stored.
compress Compression flags (1 == compress, 0 = don't
compress).
Returns:
Success or failure of the write.
This function will write the specified chunk of data to
the eet file and return greater than 0 on success. 0 will be returned
on failure.
The eet file handle must be a valid file handle for an eet
file opened for writing. If it is not, 0 will be returned and no ac
tion will be performed.
Name, and data must not be NULL, and size must be > 0. If
these conditions are not met, 0 will be returned.
The data will be copied (and optionally compressed) in
ram, pending a flush to disk (it will stay in ram till the eet file han
dle is closed though).
Since:
1.0.0

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eet.h(3)

NAME

SYNOPSIS

Detailed Description

Define Documentation

EET_DATA_DESCRIPTOR_ADD_BASIC()

EET_DATA_DESCRIPTOR_ADD_BASIC()

Function Documentation

EET_DATA_DESCRIPTOR_ADD_BASIC()

EET_DATA_DESCRIPTOR_ADD_LIST()

EET_DATA_DESCRIPTOR_ADD_SUB()

Author