02-01-2012
I found a reference to it here:
https://en.wikipedia.org/wiki/Thompson_shell.
It would seem that Bourne kept it for compatibility with the Thompson shell I guess.
It's mentioned here too in the Thompson shell man page:
http://www.in-ulm.de/~mascheck/bourne/v4/
search for the circumflex character '^'.
"One or more commands separated by '|' or '^' constitute a pipeline."
Look at this even older Thompson shell version, where pipe symbols were the same as redirection:
http://www.in-ulm.de/~mascheck/bourne/v3/
By extending the syntax used for
redirection of I/O, a command line can specify that the
output produced by a command be passed via a pipe through
another command which acts as a filter. For example:
command >filter>
Last edited by gary_w; 02-01-2012 at 12:55 PM..
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merge_fonts
merge_fonts(3alleg4) Allegro manual merge_fonts(3alleg4)
NAME
merge_fonts - Merges two fonts into one font. Allegro game programming library.
SYNOPSIS
#include <allegro.h>
FONT *merge_fonts(FONT *f1, FONT *f2)
DESCRIPTION
This function merges the character ranges from two fonts and returns a new font containing all characters in the old fonts. In general, you
cannot merge fonts of different types (eg, TrueType fonts and bitmapped fonts), but as a special case, this function can promote a mono-
chrome bitmapped font to a color font and merge those. Example:
FONT *myfont;
FONT *myfancy_font;
FONT *lower_range;
FONT *upper_range;
FONT *capitals;
FONT *combined_font;
FONT *tempfont;
...
/* Create a font that contains the capitals from */
/* the fancy font but other characters from myfont */
lower_range = extract_font_range(myfont, -1, 'A'-1);
upper_range = extract_font_range(myfont, 'Z'+1, -1);
capitals = extract_font_range(myfancy_font, 'A', 'Z');
tempfont = merge_fonts(lower_range, capitals);
combined_font = merge_fonts(tempfont, upper_range);
/* Clean up temporary fonts */
destroy_font(lower_range);
destroy_font(upper_range);
destroy_font(capitals);
destroy_font(tempfont);
RETURN VALUE
Returns a pointer to the new font or NULL on error. Remember that you are responsible for destroying the font when you are finished with it
to avoid memory leaks.
SEE ALSO
extract_font_range(3alleg4), is_trans_font(3alleg4), is_color_font(3alleg4), is_mono_font(3alleg4), exfont(3alleg4)
Allegro version 4.4.2 merge_fonts(3alleg4)