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Diffstat (limited to 'gcc/cp/input.c')
| -rw-r--r-- | gcc/cp/input.c | 202 |
1 files changed, 0 insertions, 202 deletions
diff --git a/gcc/cp/input.c b/gcc/cp/input.c deleted file mode 100644 index e142bf4f99d..00000000000 --- a/gcc/cp/input.c +++ /dev/null @@ -1,202 +0,0 @@ -/* Input handling for G++. - Copyright (C) 1992, 1993, 1994, 1995 Free Software Foundation, Inc. - Written by Ken Raeburn (raeburn@cygnus.com) while at Watchmaker Computing. - -This file is part of GNU CC. - -GNU CC is free software; you can redistribute it and/or modify -it under the terms of the GNU General Public License as published by -the Free Software Foundation; either version 2, or (at your option) -any later version. - -GNU CC is distributed in the hope that it will be useful, -but WITHOUT ANY WARRANTY; without even the implied warranty of -MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the -GNU General Public License for more details. - -You should have received a copy of the GNU General Public License -along with GNU CC; see the file COPYING. If not, write to -the Free Software Foundation, 59 Temple Place - Suite 330, -Boston, MA 02111-1307, USA. */ - -/* G++ needs to do enough saving and re-parsing of text that it is - necessary to abandon the simple FILE* model and use a mechanism where - we can pre-empt one input stream with another derived from saved text; - we may need to do this arbitrarily often, and cannot depend on having - the GNU library available, so FILE objects just don't cut it. - - This file is written as a separate module, but can be included by - lex.c for very minor efficiency gains (primarily in function - inlining). */ - -#include <stdio.h> -#include "obstack.h" - -extern FILE *finput; - -struct pending_input *save_pending_input (); -void restore_pending_input (); - -struct input_source { - /* saved string */ - char *str; - int length; - /* current position, when reading as input */ - int offset; - /* obstack to free this input string from when finished, if any */ - struct obstack *obstack; - /* linked list maintenance */ - struct input_source *next; - /* values to restore after reading all of current string */ - char *filename; - int lineno; - struct pending_input *input; - int putback_char; -}; - -static struct input_source *input, *free_inputs; - -extern char *input_filename; -extern int lineno; - -#ifdef __GNUC__ -#define inline __inline__ -#else -#define inline -#endif - -static inline struct input_source * -allocate_input () -{ - struct input_source *inp; - if (free_inputs) - { - inp = free_inputs; - free_inputs = inp->next; - inp->next = 0; - return inp; - } - inp = (struct input_source *) xmalloc (sizeof (struct input_source)); - inp->next = 0; - inp->obstack = 0; - return inp; -} - -static inline void -free_input (inp) - struct input_source *inp; -{ - if (inp->obstack) - obstack_free (inp->obstack, inp->str); - inp->obstack = 0; - inp->str = 0; - inp->length = 0; - inp->next = free_inputs; - free_inputs = inp; -} - -static int putback_char = -1; - -/* Some of these external functions are declared inline in case this file - is included in lex.c. */ - -inline -void -feed_input (str, len, delete) - char *str; - int len; - struct obstack *delete; -{ - struct input_source *inp = allocate_input (); - - /* This shouldn't be necessary. */ - while (len && !str[len-1]) - len--; - - inp->str = str; - inp->length = len; - inp->obstack = delete; - inp->offset = 0; - inp->next = input; - inp->filename = input_filename; - inp->lineno = lineno; - inp->input = save_pending_input (); - inp->putback_char = putback_char; - putback_char = -1; - input = inp; -} - -struct pending_input *to_be_restored; /* XXX */ -extern int end_of_file; - -static inline int -sub_getch () -{ - if (putback_char != -1) - { - int ch = putback_char; - putback_char = -1; - return ch; - } - if (input) - { - if (input->offset == input->length) - { - struct input_source *inp = input; - my_friendly_assert (putback_char == -1, 223); - to_be_restored = inp->input; - input->offset++; - return EOF; - } - else if (input->offset > input->length) - { - struct input_source *inp = input; - - end_of_file = 0; - input = inp->next; - input_filename = inp->filename; - lineno = inp->lineno; - /* Get interface/implementation back in sync. */ - extract_interface_info (); - putback_char = inp->putback_char; - free_input (inp); - return getch (); - } - if (input) - return (unsigned char)input->str[input->offset++]; - } - return getc (finput); -} - -inline -void -put_back (ch) - int ch; -{ - if (ch != EOF) - { - my_friendly_assert (putback_char == -1, 224); - putback_char = ch; - } -} - -extern int linemode; - -int -getch () -{ - int ch = sub_getch (); - if (linemode && ch == '\n') - { - put_back (ch); - ch = EOF; - } - return ch; -} - -inline -int -input_redirected () -{ - return input != 0; -} |