diff options
Diffstat (limited to 'gcc/cp/input.c')
| -rw-r--r-- | gcc/cp/input.c | 240 |
1 files changed, 0 insertions, 240 deletions
diff --git a/gcc/cp/input.c b/gcc/cp/input.c deleted file mode 100644 index 431fed792a8..00000000000 --- a/gcc/cp/input.c +++ /dev/null @@ -1,240 +0,0 @@ -/* Input handling for G++. - Copyright (C) 1992, 1993, 1994, 1995, 1996, 1997, 1998, 1999, 2000 - Free Software Foundation, Inc. - Written by Ken Raeburn (raeburn@cygnus.com) while at Watchmaker Computing. - Enhanced by Michael Tiemann (tiemann@cygnus.com) to better support USE_CPPLIB - -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 "system.h" - -#if !USE_CPPLIB -struct putback_buffer { - char *buffer; - int buffer_size; - int index; -}; - -static struct putback_buffer putback = {NULL, 0, -1}; -#endif - -struct input_source { - /* saved string */ - const char *str; - int length; - /* current position, when reading as input */ - int offset; - /* linked list maintenance */ - struct input_source *next; - /* values to restore after reading all of current string */ - struct pending_input *input; -#if !USE_CPPLIB - const char *filename; - int lineno; - struct putback_buffer putback; -#endif -}; - -static struct input_source *input, *free_inputs; - -#if USE_CPPLIB -extern unsigned char *yy_cur, *yy_lim; -extern int yy_get_token (); -#endif - -extern void feed_input PARAMS ((const char *, int, const char *, int)); -extern void put_input PARAMS ((int)); -extern void put_back PARAMS ((int)); -extern int getch PARAMS ((void)); -extern int input_redirected PARAMS ((void)); - -static inline struct input_source * allocate_input PARAMS ((void)); -static inline void free_input PARAMS ((struct input_source *)); -static inline void end_input PARAMS ((void)); - -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; - return inp; -} - -static inline void -free_input (inp) - struct input_source *inp; -{ - inp->str = 0; - inp->length = 0; - inp->next = free_inputs; - free_inputs = inp; -} - -/* Some of these external functions are declared inline in case this file - is included in lex.c. */ - -inline -void -feed_input (str, len, file, line) - const char *str; - int len; - const char *file; - int line; -{ - struct input_source *inp = allocate_input (); - - /* This shouldn't be necessary. */ - while (len && !str[len-1]) - len--; - -#if USE_CPPLIB - if (yy_lim > yy_cur) - /* If we've started reading the next token, we're hosed. The - token_getch stuff is supposed to prevent this from happening. */ - my_friendly_abort (990710); - cpp_push_buffer (&parse_in, str, len); - CPP_BUFFER (&parse_in)->manual_pop = 1; - CPP_BUFFER (&parse_in)->nominal_fname - = CPP_BUFFER (&parse_in)->fname = file; - CPP_BUFFER (&parse_in)->lineno = parse_in.lineno = line; -#else - inp->str = str; - inp->length = len; - inp->offset = 0; - inp->putback = putback; - inp->filename = input_filename; - inp->lineno = lineno; - putback.buffer = NULL; - putback.buffer_size = 0; - putback.index = -1; -#endif - inp->next = input; - inp->input = save_pending_input (); - input = inp; - lineno = line; - input_filename = file; -} - -extern int end_of_file; - -static inline void -end_input () -{ - struct input_source *inp = input; - -#if USE_CPPLIB - cpp_pop_buffer (&parse_in); -#else - putback = inp->putback; - input_filename = inp->filename; - lineno = inp->lineno; -#endif - - end_of_file = 0; - input = inp->next; - /* Get interface/implementation back in sync. */ - extract_interface_info (); - restore_pending_input (inp->input); - free_input (inp); -} - -inline int -getch () -{ -#if USE_CPPLIB - return (yy_cur < yy_lim ? *yy_cur++ : yy_get_token ()); -#else - if (putback.index != -1) - { - int ch = putback.buffer[putback.index]; - --putback.index; - return ch; - } - if (input) - { - if (input->offset >= input->length) - { - my_friendly_assert (putback.index == -1, 223); - ++(input->offset); - if (input->offset - input->length < 64) - return EOF; - - /* We must be stuck in an error-handling rule; give up. */ - end_input (); - return getch (); - } - return (unsigned char)input->str[input->offset++]; - } - return getc (finput); -#endif -} - -inline -void -put_back (ch) - int ch; -{ -#if USE_CPPLIB - if (ch == EOF) - ; - else if (yy_cur[-1] != ch) - my_friendly_abort (990709); - else - yy_cur--; -#else - if (ch != EOF) - { - if (putback.index == putback.buffer_size - 1) - { - putback.buffer_size += 16; - putback.buffer = xrealloc (putback.buffer, putback.buffer_size); - } - my_friendly_assert (putback.buffer != NULL, 224); - putback.buffer[++putback.index] = ch; - } -#endif -} - -inline -int -input_redirected () -{ -#ifdef USE_CPPLIB - return CPP_BUFFER(&parse_in)->manual_pop; -#else - return input != 0; -#endif -} |