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120 lines
5.3 KiB
120 lines
5.3 KiB
/*************************************************************************/ |
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/* */ |
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/* Language Technologies Institute */ |
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/* Carnegie Mellon University */ |
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/* Copyright (c) 1999 */ |
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/* All Rights Reserved. */ |
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/* */ |
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/* Permission is hereby granted, free of charge, to use and distribute */ |
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/* this software and its documentation without restriction, including */ |
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/* without limitation the rights to use, copy, modify, merge, publish, */ |
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/* distribute, sublicense, and/or sell copies of this work, and to */ |
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/* permit persons to whom this work is furnished to do so, subject to */ |
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/* the following conditions: */ |
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/* 1. The code must retain the above copyright notice, this list of */ |
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/* conditions and the following disclaimer. */ |
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/* 2. Any modifications must be clearly marked as such. */ |
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/* 3. Original authors' names are not deleted. */ |
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/* 4. The authors' names are not used to endorse or promote products */ |
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/* derived from this software without specific prior written */ |
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/* permission. */ |
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/* */ |
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/* CARNEGIE MELLON UNIVERSITY AND THE CONTRIBUTORS TO THIS WORK */ |
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/* DISCLAIM ALL WARRANTIES WITH REGARD TO THIS SOFTWARE, INCLUDING */ |
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/* ALL IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS, IN NO EVENT */ |
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/* SHALL CARNEGIE MELLON UNIVERSITY NOR THE CONTRIBUTORS BE LIABLE */ |
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/* FOR ANY SPECIAL, INDIRECT OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES */ |
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/* WHATSOEVER RESULTING FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN */ |
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/* AN ACTION OF CONTRACT, NEGLIGENCE OR OTHER TORTIOUS ACTION, */ |
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/* ARISING OUT OF OR IN CONNECTION WITH THE USE OR PERFORMANCE OF */ |
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/* THIS SOFTWARE. */ |
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/* */ |
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/*************************************************************************/ |
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/* Author: Alan W Black (awb@cs.cmu.edu) */ |
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/* Date: July 1999 */ |
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/*************************************************************************/ |
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/* */ |
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/* Tokenizer for strings and files */ |
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/* */ |
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/*************************************************************************/ |
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#ifndef _CST_TOKENSTREAM_H__ |
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#define _CST_TOKENSTREAM_H__ |
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#include "cst_alloc.h" |
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#include "cst_string.h" |
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#include "cst_file.h" |
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typedef struct cst_tokenstream_struct { |
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cst_file fd; |
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int file_pos; |
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int line_number; |
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cst_string *string_buffer; |
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int current_char; |
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int token_pos; |
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int ws_max; |
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cst_string *whitespace; |
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int prep_max; |
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cst_string *prepunctuation; |
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int token_max; |
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cst_string *token; |
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int postp_max; |
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cst_string *postpunctuation; |
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/* Should only be set through set_charclasses as charclass table needs */ |
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/* to be updated when you reset these */ |
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const cst_string *p_whitespacesymbols; |
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const cst_string *p_singlecharsymbols; |
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const cst_string *p_prepunctuationsymbols; |
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const cst_string *p_postpunctuationsymbols; |
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cst_string charclass[256]; |
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} cst_tokenstream; |
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#define TS_CHARCLASS_NONE 0 |
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#define TS_CHARCLASS_WHITESPACE 2 |
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#define TS_CHARCLASS_SINGLECHAR 4 |
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#define TS_CHARCLASS_PREPUNCT 8 |
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#define TS_CHARCLASS_POSTPUNCT 16 |
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#define TS_CHARCLASS_QUOTE 32 |
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#define ts_charclass(C,CLASS,TS) ((TS)->charclass[(unsigned char)C] & CLASS) |
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extern const cst_string * const cst_ts_default_whitespacesymbols; |
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extern const cst_string * const cst_ts_default_prepunctuationsymbols; |
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extern const cst_string * const cst_ts_default_postpunctuationsymbols; |
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extern const cst_string * const cst_ts_default_singlecharsymbols; |
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/* Public functions for tokenstream manipulation */ |
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cst_tokenstream *ts_open(const char *filename, |
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const cst_string *whitespacesymbols, |
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const cst_string *singlecharsymbols, |
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const cst_string *prepunctsymbols, |
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const cst_string *postpunctsymbols); |
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cst_tokenstream *ts_open_string(const cst_string *string, |
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const cst_string *whitespacesymbols, |
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const cst_string *singlecharsymbols, |
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const cst_string *prepunctsymbols, |
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const cst_string *postpunctsymbols); |
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void ts_close(cst_tokenstream *ts); |
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int ts_eof(cst_tokenstream *ts); |
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const cst_string *ts_get(cst_tokenstream *ts); |
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const cst_string *ts_get_quoted_token(cst_tokenstream *ts, |
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char quote, |
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char escape); |
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void set_charclasses(cst_tokenstream *ts, |
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const cst_string *whitespace, |
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const cst_string *singlecharsymbols, |
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const cst_string *prepunctuation, |
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const cst_string *postpunctuation); |
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int ts_read(void *buff, int size, int num, cst_tokenstream *ts); |
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int ts_set_stream_pos(cst_tokenstream *ts,int pos); |
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int ts_get_stream_pos(cst_tokenstream *ts); |
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#endif
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