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https://github.com/0intro/wmii
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72 lines
1.9 KiB
C
72 lines
1.9 KiB
C
/*
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* substitution list
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*/
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#define NSUBEXP 32
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typedef struct Resublist Resublist;
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struct Resublist
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{
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Resub m[NSUBEXP];
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};
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/* max character classes per program */
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extern Reprog RePrOg;
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#define NCLASS (sizeof(RePrOg.class)/sizeof(Reclass))
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/* max rune ranges per character class */
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#define NCCRUNE (sizeof(Reclass)/sizeof(Rune))
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/*
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* Actions and Tokens (Reinst types)
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*
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* 02xx are operators, value == precedence
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* 03xx are tokens, i.e. operands for operators
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*/
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#define RUNE 0177
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#define OPERATOR 0200 /* Bitmask of all operators */
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#define START 0200 /* Start, used for marker on stack */
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#define RBRA 0201 /* Right bracket, ) */
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#define LBRA 0202 /* Left bracket, ( */
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#define OR 0203 /* Alternation, | */
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#define CAT 0204 /* Concatentation, implicit operator */
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#define STAR 0205 /* Closure, * */
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#define PLUS 0206 /* a+ == aa* */
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#define QUEST 0207 /* a? == a|nothing, i.e. 0 or 1 a's */
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#define ANY 0300 /* Any character except newline, . */
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#define ANYNL 0301 /* Any character including newline, . */
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#define NOP 0302 /* No operation, internal use only */
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#define BOL 0303 /* Beginning of line, ^ */
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#define EOL 0304 /* End of line, $ */
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#define CCLASS 0305 /* Character class, [] */
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#define NCCLASS 0306 /* Negated character class, [] */
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#define END 0377 /* Terminate: match found */
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/*
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* regexec execution lists
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*/
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#define LISTSIZE 10
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#define BIGLISTSIZE (10*LISTSIZE)
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typedef struct Relist Relist;
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struct Relist
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{
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Reinst* inst; /* Reinstruction of the thread */
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Resublist se; /* matched subexpressions in this thread */
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};
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typedef struct Reljunk Reljunk;
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struct Reljunk
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{
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Relist* relist[2];
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Relist* reliste[2];
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int starttype;
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Rune startchar;
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char* starts;
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char* eol;
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Rune* rstarts;
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Rune* reol;
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};
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extern Relist* _renewthread(Relist*, Reinst*, int, Resublist*);
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extern void _renewmatch(Resub*, int, Resublist*);
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extern Relist* _renewemptythread(Relist*, Reinst*, int, char*);
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extern Relist* _rrenewemptythread(Relist*, Reinst*, int, Rune*);
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