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59 lines
1.6 KiB
C
59 lines
1.6 KiB
C
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/*
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** $Id: lpvm.h,v 1.3 2014/02/21 13:06:41 roberto Exp $
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*/
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#if !defined(lpvm_h)
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#define lpvm_h
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#include "lpcap.h"
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/* Virtual Machine's instructions */
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typedef enum Opcode {
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IAny, /* if no char, fail */
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IChar, /* if char != aux, fail */
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ISet, /* if char not in buff, fail */
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ITestAny, /* in no char, jump to 'offset' */
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ITestChar, /* if char != aux, jump to 'offset' */
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ITestSet, /* if char not in buff, jump to 'offset' */
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ISpan, /* read a span of chars in buff */
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IBehind, /* walk back 'aux' characters (fail if not possible) */
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IRet, /* return from a rule */
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IEnd, /* end of pattern */
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IChoice, /* stack a choice; next fail will jump to 'offset' */
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IJmp, /* jump to 'offset' */
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ICall, /* call rule at 'offset' */
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IOpenCall, /* call rule number 'key' (must be closed to a ICall) */
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ICommit, /* pop choice and jump to 'offset' */
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IPartialCommit, /* update top choice to current position and jump */
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IBackCommit, /* "fails" but jump to its own 'offset' */
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IFailTwice, /* pop one choice and then fail */
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IFail, /* go back to saved state on choice and jump to saved offset */
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IGiveup, /* internal use */
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IFullCapture, /* complete capture of last 'off' chars */
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IOpenCapture, /* start a capture */
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ICloseCapture,
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ICloseRunTime
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} Opcode;
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typedef union Instruction {
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struct Inst {
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byte code;
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byte aux;
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short key;
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} i;
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int offset;
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byte buff[1];
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} Instruction;
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void printpatt (Instruction *p, int n);
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const char *match (lua_State *L, const char *o, const char *s, const char *e,
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Instruction *op, Capture *capture, int ptop);
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#endif
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