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This makes three functions and associated option structures from builtin-grep available from other parts of the system. * options to drive built-in grep engine is stored in struct grep_opt; * pattern strings and extended grep expressions are added to struct grep_opt with append_grep_pattern(); * when finished calling append_grep_pattern(), call compile_grep_patterns() to prepare for execution; * call grep_buffer() to find matches in the in-core buffer. This also adds an internal option "status_only" to grep_opt, which suppresses any output from grep_buffer(). Callers of the function as library can use it to check if there is a match without producing any output. Signed-off-by: Junio C Hamano <junkio@cox.net>
72 lines
1.4 KiB
C
72 lines
1.4 KiB
C
#ifndef GREP_H
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#define GREP_H
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enum grep_pat_token {
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GREP_PATTERN,
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GREP_AND,
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GREP_OPEN_PAREN,
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GREP_CLOSE_PAREN,
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GREP_NOT,
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GREP_OR,
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};
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struct grep_pat {
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struct grep_pat *next;
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const char *origin;
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int no;
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enum grep_pat_token token;
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const char *pattern;
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regex_t regexp;
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};
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enum grep_expr_node {
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GREP_NODE_ATOM,
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GREP_NODE_NOT,
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GREP_NODE_AND,
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GREP_NODE_OR,
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};
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struct grep_expr {
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enum grep_expr_node node;
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union {
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struct grep_pat *atom;
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struct grep_expr *unary;
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struct {
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struct grep_expr *left;
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struct grep_expr *right;
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} binary;
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} u;
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};
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struct grep_opt {
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struct grep_pat *pattern_list;
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struct grep_pat **pattern_tail;
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struct grep_expr *pattern_expression;
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int prefix_length;
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regex_t regexp;
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unsigned linenum:1;
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unsigned invert:1;
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unsigned status_only:1;
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unsigned name_only:1;
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unsigned unmatch_name_only:1;
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unsigned count:1;
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unsigned word_regexp:1;
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unsigned fixed:1;
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#define GREP_BINARY_DEFAULT 0
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#define GREP_BINARY_NOMATCH 1
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#define GREP_BINARY_TEXT 2
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unsigned binary:2;
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unsigned extended:1;
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unsigned relative:1;
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unsigned pathname:1;
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int regflags;
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unsigned pre_context;
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unsigned post_context;
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};
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extern void append_grep_pattern(struct grep_opt *opt, const char *pat, const char *origin, int no, enum grep_pat_token t);
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extern void compile_grep_patterns(struct grep_opt *opt);
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extern int grep_buffer(struct grep_opt *opt, const char *name, char *buf, unsigned long size);
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#endif
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