44 lines
1.1 KiB
C
44 lines
1.1 KiB
C
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#include "parser_internal.h"
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static HParseResult* parse_charset(void *env, HParseState *state) {
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uint8_t in = h_read_bits(&state->input_stream, 8, false);
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HCharset cs = (HCharset)env;
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if (charset_isset(cs, in)) {
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HParsedToken *tok = a_new(HParsedToken, 1);
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tok->token_type = TT_UINT; tok->uint = in;
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return make_result(state, tok);
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} else
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return NULL;
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}
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static const HParserVtable charset_vt = {
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.parse = parse_charset,
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};
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const HParser* h_ch_range(const uint8_t lower, const uint8_t upper) {
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HParser *ret = g_new(HParser, 1);
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HCharset cs = new_charset();
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for (int i = 0; i < 256; i++)
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charset_set(cs, i, (lower <= i) && (i <= upper));
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ret->vtable = &charset_vt;
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ret->env = (void*)cs;
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return (const HParser*)ret;
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}
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const HParser* h_not_in(const uint8_t *options, int count) {
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HParser *ret = g_new(HParser, 1);
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HCharset cs = new_charset();
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for (int i = 0; i < 256; i++)
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charset_set(cs, i, 1);
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for (int i = 0; i < count; i++)
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charset_set(cs, options[i], 0);
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ret->vtable = &charset_vt;
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ret->env = (void*)cs;
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return (const HParser*)ret;
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}
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