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	regexp9.h - 9base - revived minimalist port of Plan 9 userland to Unix
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	regexp9.h (1790B)
	---
	1 #ifndef _REGEXP9_H_
	2 #define _REGEXP9_H_ 1
	3 #if defined(__cplusplus)
	4 extern "C" {
	5 #endif
	6
	7 #ifdef AUTOLIB
	8 AUTOLIB(regexp9)
	9 #endif
	10
	11 #include <utf.h>
	12
	13 typedef struct Resub Resub;
	14 typedef struct Reclass Reclass;
	15 typedef struct Reinst Reinst;
	16 typedef struct Reprog Reprog;
	17
	18 /*
	19 * Sub expression matches
	20 */
	21 struct Resub{
	22 union
	23 {
	24 char *sp;
	25 Rune *rsp;
	26 }s;
	27 union
	28 {
	29 char *ep;
	30 Rune *rep;
	31 }e;
	32 };
	33
	34 /*
	35 * character class, each pair of rune's defines a range
	36 */
	37 struct Reclass{
	38 Rune *end;
	39 Rune spans[64];
	40 };
	41
	42 /*
	43 * Machine instructions
	44 */
	45 struct Reinst{
	46 int type;
	47 union {
	48 Reclass cp; / class pointer */
	49 Rune r; /* character */
	50 int subid; /* sub-expression id fo…
	51 Reinst right; / right child of O…
	52 }u1;
	53 union { /* regexp relies on these two being in the same u…
	54 Reinst left; / left child of OR */
	55 Reinst next; / next instruction for CAT…
	56 }u2;
	57 };
	58
	59 /*
	60 * Reprogram definition
	61 */
	62 struct Reprog{
	63 Reinst startinst; / start pc */
	64 Reclass class[16]; /* .data */
	65 Reinst firstinst[5]; /* .text */
	66 };
	67
	68 extern Reprog regcomp9(char);
	69 extern Reprog regcomplit9(char);
	70 extern Reprog regcompnl9(char);
	71 extern void regerror9(char*);
	72 extern int regexec9(Reprog, char, Resub*, int);
	73 extern void regsub9(char, char, int, Resub*, int);
	74
	75 extern int rregexec9(Reprog, Rune, Resub*, int);
	76 extern void rregsub9(Rune, Rune, int, Resub*, int);
	77
	78 /*
	79 * Darwin simply cannot handle having routines that
	80 * override other library routines.
	81 */
	82 #ifndef NOPLAN9DEFINES
	83 #define regcomp regcomp9
	84 #define regcomplit regcomplit9
	85 #define regcompnl regcompnl9
	86 #define regerror regerror9
	87 #define regexec regexec9
	88 #define regsub regsub9
	89 #define rregexec rregexec9
	90 #define rregsub rregsub9
	91 #endif
	92
	93 #if defined(__cplusplus)
	94 }
	95 #endif
	96 #endif