159 lines
3.1 KiB
C
159 lines
3.1 KiB
C
/* Copyright (C) 1996 Free Software Foundation, Inc.
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This file is part of the GNU C Library.
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Contributed by Ulrich Drepper, <drepper@gnu.ai.mit.edu>.
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The GNU C Library is free software; you can redistribute it and/or
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modify it under the terms of the GNU Library General Public License as
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published by the Free Software Foundation; either version 2 of the
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License, or (at your option) any later version.
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The GNU C Library is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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Library General Public License for more details.
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You should have received a copy of the GNU Library General Public
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License along with the GNU C Library; see the file COPYING.LIB. If
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not, write to the Free Software Foundation, Inc., 59 Temple Place - Suite 330,
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Boston, MA 02111-1307, USA. */
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#ifndef _LINEREADER_H
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#define _LINEREADER_H 1
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#include <ctype.h>
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#include <libintl.h>
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#include <stdio.h>
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#include "error.h"
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#include "locfile-token.h"
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typedef const struct keyword_t *(*kw_hash_fct_t) (const char *, int);
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struct charset_t;
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struct token
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{
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enum token_t tok;
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union
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{
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struct
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{
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char *start;
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size_t len;
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} str;
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unsigned long int num;
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struct
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{
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unsigned int val;
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int nbytes;
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} charcode;
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} val;
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};
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struct linereader
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{
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FILE *fp;
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const char *fname;
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char *buf;
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size_t bufsize;
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size_t bufact;
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size_t lineno;
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size_t idx;
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char comment_char;
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char escape_char;
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struct token token;
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int translate_strings;
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kw_hash_fct_t hash_fct;
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};
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/* Functions defined in linereader.c. */
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struct linereader *lr_open (const char *fname, kw_hash_fct_t hf);
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int lr_eof (struct linereader *lr);
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void lr_close (struct linereader *lr);
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int lr_next (struct linereader *lr);
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struct token *lr_token (struct linereader *lr,
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const struct charset_t *charset);
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#define lr_error(lr, fmt, args...) \
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error_at_line (0, 0, lr->fname, lr->lineno, fmt, ## args)
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static inline int
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lr_getc (struct linereader *lr)
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{
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if (lr->idx == lr->bufact)
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{
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if (lr->bufact != 0)
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if (lr_next (lr) < 0)
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return EOF;
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if (lr->bufact == 0)
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return EOF;
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}
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return lr->buf[lr->idx] == '\32' ? EOF : lr->buf[lr->idx++];
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}
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static inline int
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lr_ungetc (struct linereader *lr, int ch)
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{
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if (lr->idx == 0)
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return -1;
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lr->buf[--lr->idx] = ch;
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return 0;
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}
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static inline int
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lr_ungetn (struct linereader *lr, int n)
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{
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if (lr->idx < n)
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return -1;
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lr->idx -= n;
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return 0;
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}
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static inline void
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lr_ignore_rest (struct linereader *lr, int verbose)
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{
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if (verbose)
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{
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while (isspace (lr->buf[lr->idx]) && lr->buf[lr->idx] != '\n'
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&& lr->buf[lr->idx] != lr->comment_char)
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if (lr->buf[lr->idx] == '\0')
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{
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if (lr_next (lr) < 0)
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return;
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}
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else
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++lr->idx;
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if (lr->buf[lr->idx] != '\n' &&lr->buf[lr->idx] != lr->comment_char)
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lr_error (lr, _("trailing garbage at end of line"));
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}
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/* Ignore continued line. */
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while (lr->bufact > 0 && lr->buf[lr->bufact - 1] != '\n')
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if (lr_next (lr) < 0)
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break;
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lr->idx = lr->bufact;
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}
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#endif /* linereader.h */
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