1load_datafile_callback(3)       Allegro manual       load_datafile_callback(3)
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NAME

6       load_datafile_callback  -  Loads a datafile into memory, calling a hook
7       per object. Allegro game programming library.
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SYNOPSIS

10       #include <allegro.h>
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13       DATAFILE *load_datafile_callback(const  char  *filename,  void  (*call‐
14       back)(DATAFILE *d));
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DESCRIPTION

17       Loads  a datafile into memory, calling the specified hook function once
18       for each object in the file, passing it a pointer to  the  object  just
19       read.  You  can use this to implement very simple loading screens where
20       every time the hook is called, the screen is updated to  let  the  user
21       know your program is still loading from disk:
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23          void load_callback(DATAFILE *dat_obj)
24          {
25             static const char indicator[] = "-\\|/-.oOXOo.";
26             static int current = 0;
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28             /* Show a different character every time. */
29             textprintf_ex(screen, font, 0, 0, makecol(0, 0, 0),
30                           makecol(255, 255, 255), "%c Loading %c",
31                           indicator[current], indicator[current]);
32             /* Increase index and check if we need to reset it. */
33             current++;
34             if (!indicator[current])
35                current = 0;
36          }
37             ...
38             dat = load_datafile_callback("data.dat", load_callback);
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RETURN VALUE

41       Returns  a  pointer  to the DATAFILE or NULL on error. Remember to free
42       this DATAFILE later to avoid memory leaks.
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SEE ALSO

46       load_datafile(3),     unload_datafile(3),      load_datafile_object(3),
47       set_color_conversion(3),    fixup_datafile(3),    packfile_password(3),
48       find_datafile_object(3), register_datafile_object(3)
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52Allegro                          version 4.2.2       load_datafile_callback(3)
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