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/**************************************************************/
/* treebnf: a tree oriented bnf library */
/* Copyright (C) 2024 SysDeer Technologies, LLC */
/* Released under GPLv2 and GPLv3; see COPYING.TREEBNF. */
/**************************************************************/
#ifndef TBNF_REGEX_SCANFNS_H
#define TBNF_REGEX_SCANFNS_H
#include <treebnf/treebnf.h>
/* in-brace scanners */
static inline int tbnf_regex_scan_brace_rbrace(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '}')
return 1;
return -1;
}
static inline int tbnf_regex_scan_brace_digit(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] >= '0')
if (sctx->tok_scan_mark[0] <= '9')
return 1;
return -1;
}
static inline int tbnf_regex_scan_brace_comma(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == ',')
return 1;
return -1;
}
/* in-bracket scanners */
static inline int tbnf_regex_scan_bracket_escaped_char(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '\\')
if (&sctx->tok_scan_mark[1] < sctx->tok_scan_cap)
if (sctx->tok_scan_mark[1])
return 2;
return -1;
}
static inline int tbnf_regex_scan_bracket_character_class(const struct tbnf_scan_ctx * sctx)
{
const char * ch = 0;
if (&sctx->tok_scan_mark[4] >= sctx->tok_scan_cap)
return -1;
if (sctx->tok_scan_mark[0] == '[')
if (sctx->tok_scan_mark[1] == ':')
ch = &sctx->tok_scan_mark[2];
if (!ch)
return -1;
for (; (*ch >= 'a') && (*ch <= 'z') && (&ch[2] < sctx->tok_scan_cap); )
ch++;
if ((*ch++ == ':') && (*ch++ == ']'))
return (ch - sctx->tok_scan_mark);
return -1;
}
static inline int tbnf_regex_scan_bracket_collation_symbol(const struct tbnf_scan_ctx * sctx)
{
if (&sctx->tok_scan_mark[4] >= sctx->tok_scan_cap)
return -1;
if (sctx->tok_scan_mark[0] == '[')
if (sctx->tok_scan_mark[1] == '.')
if (sctx->tok_scan_mark[3] == '.')
if (sctx->tok_scan_mark[4] == ']')
if (sctx->tok_scan_mark[2])
return 5;
return -1;
}
static inline int tbnf_regex_scan_bracket_equivalence_class(const struct tbnf_scan_ctx * sctx)
{
const char * ch = 0;
if (&sctx->tok_scan_mark[4] >= sctx->tok_scan_cap)
return -1;
if (sctx->tok_scan_mark[0] == '[')
if (sctx->tok_scan_mark[1] == '=')
ch = &sctx->tok_scan_mark[2];
if (!ch)
return -1;
for (; (*ch >= 'a') && (*ch <= 'z') && (&ch[2] < sctx->tok_scan_cap); )
ch++;
if ((*ch++ == '=') && (*ch++ == ']'))
return (ch - sctx->tok_scan_mark);
return -1;
}
static inline int tbnf_regex_scan_bracket_rbracket(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == ']')
return 1;
return -1;
}
static inline int tbnf_regex_scan_bracket_hyphen(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '-')
return 1;
return -1;
}
static inline int tbnf_regex_scan_bracket_error(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '[')
return 1;
return -1;
}
/* bracket state entry scanners */
static inline int tbnf_regex_scan_lbracket_circumflex_rbracket(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '[')
if (&sctx->tok_scan_mark[2] < sctx->tok_scan_cap)
if (sctx->tok_scan_mark[1] == '^')
if (sctx->tok_scan_mark[2] == ']')
return 3;
return -1;
}
static inline int tbnf_regex_scan_lbracket_circumflex(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '[')
if (&sctx->tok_scan_mark[1] < sctx->tok_scan_cap)
if (sctx->tok_scan_mark[1] == '^')
return 2;
return -1;
}
static inline int tbnf_regex_scan_lbracket_rbracket(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '[')
if (&sctx->tok_scan_mark[1] < sctx->tok_scan_cap)
if (sctx->tok_scan_mark[1] == ']')
return 2;
return -1;
}
static inline int tbnf_regex_scan_lbracket(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '[')
return 1;
return -1;
}
/* common scanners */
static inline int tbnf_regex_scan_escaped_char(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '\\')
if (&sctx->tok_scan_mark[1] < sctx->tok_scan_cap)
if (sctx->tok_scan_mark[1])
return 2;
return -1;
}
static inline int tbnf_regex_scan_circumflex_asterisk(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '^')
if (&sctx->tok_scan_mark[1] < sctx->tok_scan_cap)
if (sctx->tok_scan_mark[1] == '*')
return 2;
return -1;
}
static inline int tbnf_regex_scan_circumflex(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '^')
return 1;
return -1;
}
static inline int tbnf_regex_scan_lbrace(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '{')
return 1;
return -1;
}
static inline int tbnf_regex_scan_lparen(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '(')
return 1;
return -1;
}
static inline int tbnf_regex_scan_rparen(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == ')')
return 1;
return -1;
}
static inline int tbnf_regex_scan_asterisk(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '*')
return 1;
return -1;
}
static inline int tbnf_regex_scan_period(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '.')
return 1;
return -1;
}
static inline int tbnf_regex_scan_dollar(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '$')
return 1;
return -1;
}
static inline int tbnf_regex_scan_vline(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '|')
return 1;
return -1;
}
static inline int tbnf_regex_scan_qmark(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '?')
return 1;
return -1;
}
static inline int tbnf_regex_scan_plus(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0] == '+')
return 1;
return -1;
}
static inline int tbnf_regex_scan_char(const struct tbnf_scan_ctx * sctx)
{
if (sctx->tok_scan_mark[0])
return 1;
return -1;
}
#endif
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