NAME 
src/rx.c - Supporting file for the regular expression engine
DESCRIPTION
rx.c and rx.h set up functions to be used by the regular expression engine.
They also define internal helper functions that add a layer of abstraction to the rx_is_X family of functions.
Please also see rx.ops,
rx.dev,
rxstacks.c,
and rxstacks.h.
rxinfo is the main structure involved in regular expressions; it's stuffed into a Handle PMC and passed to all regular expression opcodes.
Functions
INTVAL rx_is_word_character(Interp *interpreter, INTVAL ch)- Checks to see if supplied char is a word character.
It uses the constant
RX_WORDCHARSto create a bitmap. Please see docs/dev/rx.dev for a detailed explanation of bitmap. INTVAL rx_is_number_character(Interp *interpreter, INTVAL ch)- Checks to see if supplied character is a number character. This function breaks abstraction to gain speed. It's just a speed hack for now, it will change when it needs to be changed (for different language support/character encoding).
INTVAL rx_is_whitespace_character(Interp *interpreter, INTVAL ch)- Checks to see if supplied character is a whitespace character.
INTVAL rx_is_newline(Interp *interpreter, INTVAL ch)- Checks to see if supplied character is a newline.
Bitmap bitmap_make(Interp *interpreter, STRING *str)- Creates a bitmap from supplied string. Please see docs/dev/rx.dev for more information on bitmaps.
Bitmap bitmap_make_cstr(Interp *interpreter, const char *str)- Same as
bitmap_make(), except passed aconst char*arg. void bitmap_add(Interp *interpreter, Bitmap bmp, INTVAL ch)- Appends supplied character to supplied bitmap.
INTVAL bitmap_match(Bitmap bmp, INTVAL ch)- Checks if supplied character is in supplied bitmap.
void bitmap_destroy(Bitmap bmp)- Frees up memory the bitmap allocated.
SEE ALSO
include/parrot/rx.h, src/rxstacks.c, include/parrot/rxstacks.h, docs/dev/rx.dev.
