Other New Primitives in Epsilon 10

Lugaru's Epsilon
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Other New Primitives in Epsilon 10

int muldiv(int a, int b, int c)

The muldiv( ) primitive takes its arguments and returns the value a * b / c, performing this computation using 64-bit arithmetic. It's useful in such tasks as showing "percentage complete" while operating on a large buffer. Simply writing point * 100 / size() in EEL would use 32-bit arithmetic as EEL always does, and on large buffers (over about 20 megabytes) the result would be wrong.

int find_c_func_info(char *type, char *class, char *func, int stop_on_key)
The find_c_func_info( ) subroutine gets info on the function or class defined at point in the current C-mode buffer, by parsing the buffer. It sets class to the class name of the current item, if any, and func to the function name if any. It sets type to "class", "struct", or "union" if it can determine which is appropriate. Outside a function or class definition, the above will be set to "". You may pass NULL for any of the above parameters if you don't need that information.

If stop_on_key is nonzero, and the user presses a key while the function is running, the function will immediately return -1 without setting the above variables. Otherwise the function returns a bit pattern: CF_INFO_TYPE if type was set non-empty; CF_INFO_CLASS if class was set non-empty; and CF_INFO_FUNC if func was set non-empty. In addition to zero, only these combination can occur:

CF_INFO_TYPE   CF_INFO_CLASS   CF_INFO_FUNC



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int isalnum(int c) int isident(int c)
The isalnum( ) subroutine returns nonzero if the specified character is alphanumeric: either a letter or a digit. The isident( ) subroutine returns nonzero if the specified character is an identifier character: a letter, a digit, or the _ character.

int has_feature;
Epsilon provides the has-feature variable so an EEL function can determine which facilities are available in the current environment. Bits represent possible features. Often these indicate whether a certain primitive is implemented.

FEAT_ANYCOLOR   Epsilon can use all RGB colors, not just certain ones.

FEAT_GUI_DIALOGS   display_dialog_box( ) is implemented.

FEAT_FILE_DIALOG   common_file_dlg( ) is implemented.

FEAT_COLOR_DIALOG   comm_dlg_color( ) is implemented.

FEAT_SEARCH_DIALOG   find_dialog( ) is implemented.

FEAT_FONT_DIALOG   windows_set_font( ) is implemented.

FEAT_SET_WIN_CAPTION   set_window_caption( ) is implemented.

FEAT_OS_PRINTING   print_window( ) is implemented.

FEAT_WINHELP   win_help_string( ) and similar are implemented.

FEAT_OS_MENUS   win_load_menu( ) and similar are implemented.

FEAT_ANSI_CHARS   Does this system normally use ANSI fonts, not DOS/OEM?

FEAT_EEL_RESIZE_SCREEN   Does EEL code control resizing the screen?

FEAT_INTERNET   Are Epsilon's Internet functions available?

FEAT_SET_FONT   Can EEL set the font via variables?

FEAT_DETECT_CONCUR_WAIT   Can Epsilon learn that a concurrent process waits for input?

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