1999-05-03 09:29:11 +02:00
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/* input_file.c - Deal with Input Files -
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2018-01-03 06:17:27 +01:00
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Copyright (C) 1987-2018 Free Software Foundation, Inc.
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1999-05-03 09:29:11 +02:00
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This file is part of GAS, the GNU Assembler.
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GAS is free software; you can redistribute it and/or modify
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it under the terms of the GNU General Public License as published by
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2007-07-03 13:01:12 +02:00
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the Free Software Foundation; either version 3, or (at your option)
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1999-05-03 09:29:11 +02:00
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any later version.
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GAS 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
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GNU General Public License for more details.
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You should have received a copy of the GNU General Public License
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1999-06-03 02:24:14 +02:00
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along with GAS; see the file COPYING. If not, write to the Free
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2005-05-05 11:13:19 +02:00
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Software Foundation, 51 Franklin Street - Fifth Floor, Boston, MA
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02110-1301, USA. */
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1999-05-03 09:29:11 +02:00
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2001-07-10 11:45:50 +02:00
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/* Confines all details of reading source bytes to this module.
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All O/S specific crocks should live here.
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What we lose in "efficiency" we gain in modularity.
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Note we don't need to #include the "as.h" file. No common coupling! */
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1999-05-03 09:29:11 +02:00
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#include "as.h"
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#include "input-file.h"
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2001-10-11 09:17:47 +02:00
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#include "safe-ctype.h"
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1999-05-03 09:29:11 +02:00
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/* This variable is non-zero if the file currently being read should be
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2001-07-10 11:45:50 +02:00
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preprocessed by app. It is zero if the file can be read straight in. */
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1999-05-03 09:29:11 +02:00
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int preprocess = 0;
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2001-07-10 11:45:50 +02:00
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/* This code opens a file, then delivers BUFFER_SIZE character
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chunks of the file on demand.
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BUFFER_SIZE is supposed to be a number chosen for speed.
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The caller only asks once what BUFFER_SIZE is, and asks before
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the nature of the input files (if any) is known. */
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1999-05-03 09:29:11 +02:00
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#define BUFFER_SIZE (32 * 1024)
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2001-07-10 11:45:50 +02:00
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/* We use static data: the data area is not sharable. */
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1999-05-03 09:29:11 +02:00
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static FILE *f_in;
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2016-02-22 15:11:27 +01:00
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static const char *file_name;
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1999-05-03 09:29:11 +02:00
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/* Struct for saving the state of this module for file includes. */
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2001-07-10 11:45:50 +02:00
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struct saved_file
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{
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FILE * f_in;
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2016-02-22 15:11:27 +01:00
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const char * file_name;
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2001-07-10 11:45:50 +02:00
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int preprocess;
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char * app_save;
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};
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1999-05-03 09:29:11 +02:00
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2003-10-27 13:45:17 +01:00
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/* These hooks accommodate most operating systems. */
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1999-05-03 09:29:11 +02:00
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2000-09-09 22:23:15 +02:00
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void
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2003-11-24 04:37:58 +01:00
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input_file_begin (void)
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1999-05-03 09:29:11 +02:00
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{
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f_in = (FILE *) 0;
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}
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2000-09-09 22:23:15 +02:00
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void
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2003-11-24 04:37:58 +01:00
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input_file_end (void)
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1999-05-03 09:29:11 +02:00
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{
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}
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2000-09-09 22:23:15 +02:00
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/* Return BUFFER_SIZE. */
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PR gas/14201
* sb.h (sb_max_power_two): Delete.
(struct sb): Delete "item" and "pot". Make "len" a size_t. Add "max".
(sb_element): Delete.
(sb_add_char, sb_add_buffer, sb_skip_comma, sb_skip_write): Update
prototypes.
* sb.c (string_count, free_list): Delete.
(sb_build, sb_kill, sb_check): Rewrite.
(scrub_from_sb, sb_add_char, sb_add_string, sb_add_buffer,
sb_skip_white, sb_skip_comma): Replace assorted int params,
vars and return types with size_t.
* input-scrub.c: Likewise.
* macro.c: Likewise.
* macro.h: Likewise.
* as.c: Likewise.
* as.h: Likewise.
* input-file.h: Likewise.
* input-file.c: Likewise.
* read.c: Likewise.
* app.c: ..or ptrdiff_t.
* input-file.c (input_file_get): Use ferror.
(input_file_give_next_buffer): Use input_file_get.
2012-06-07 14:47:23 +02:00
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size_t
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2003-11-24 04:37:58 +01:00
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input_file_buffer_size (void)
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1999-05-03 09:29:11 +02:00
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{
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return (BUFFER_SIZE);
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}
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/* Push the state of our input, returning a pointer to saved info that
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can be restored with input_file_pop (). */
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2001-07-10 11:45:50 +02:00
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1999-05-03 09:29:11 +02:00
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char *
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2003-11-24 04:37:58 +01:00
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input_file_push (void)
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1999-05-03 09:29:11 +02:00
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{
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Don't use register keyword
* expr.c (expr_symbol_where): Don't use register keyword.
* app.c (app_push, app_pop, do_scrub_chars): Likewise.
* ecoff.c (add_string, add_ecoff_symbol, add_aux_sym_symint,
add_aux_sym_rndx, add_aux_sym_tir, add_procedure, add_file,
ecoff_build_lineno, ecoff_setup_ext, allocate_cluster.
allocate_scope, allocate_vlinks, allocate_shash,
allocate_thash, allocate_tag, allocate_forward, allocate_thead,
allocate_lineno_list): Likewise.
* frags.c (frag_more, frag_var, frag_variant, frag_wane): Likewise.
* input-file.c (input_file_push, input_file_pop): Likewise.
* input-scrub.c (input_scrub_push, input_scrub_next_buffer): Likewise.
* subsegs.c (subseg_change): Likewise.
* symbols.c (colon, symbol_table_insert, symbol_find_or_make)
(dollar_label_name, fb_label_name): Likewise.
* write.c (relax_align): Likewise.
* config/tc-alpha.c (s_alpha_pdesc): Likewise.
* config/tc-bfin.c (bfin_s_bss): Likewise.
* config/tc-i860.c (md_estimate_size_before_relax): Likewise.
* config/tc-m68hc11.c (md_convert_frag): Likewise.
* config/tc-m68k.c (m68k_ip, crack_operand): Likewise.
(md_convert_frag_1, s_even): Likewise.
* config/tc-mips.c (mips_clear_insn_labels): Likewise.
* config/tc-mn10200.c (md_begin): Likewise.
* config/tc-s390.c (s390_setup_opcodes, md_begin): Likewise.
* config/tc-sh.c (sh_elf_cons): Likewise.
* config/tc-tic4x.c (tic4x_cons, tic4x_stringer): Likewise.
* config/m68k-parse.y (m68k_reg_parse): Likewise. Convert from K&R.
(yylex, m68k_ip_op, yyerror): Convert from K&R.
2014-11-04 06:01:09 +01:00
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struct saved_file *saved;
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1999-05-03 09:29:11 +02:00
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2016-04-01 15:26:30 +02:00
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saved = XNEW (struct saved_file);
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1999-05-03 09:29:11 +02:00
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saved->f_in = f_in;
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saved->file_name = file_name;
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saved->preprocess = preprocess;
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if (preprocess)
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saved->app_save = app_push ();
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2001-07-10 11:45:50 +02:00
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/* Initialize for new file. */
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input_file_begin ();
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1999-05-03 09:29:11 +02:00
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return (char *) saved;
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}
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void
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2003-11-24 04:37:58 +01:00
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input_file_pop (char *arg)
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1999-05-03 09:29:11 +02:00
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{
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Don't use register keyword
* expr.c (expr_symbol_where): Don't use register keyword.
* app.c (app_push, app_pop, do_scrub_chars): Likewise.
* ecoff.c (add_string, add_ecoff_symbol, add_aux_sym_symint,
add_aux_sym_rndx, add_aux_sym_tir, add_procedure, add_file,
ecoff_build_lineno, ecoff_setup_ext, allocate_cluster.
allocate_scope, allocate_vlinks, allocate_shash,
allocate_thash, allocate_tag, allocate_forward, allocate_thead,
allocate_lineno_list): Likewise.
* frags.c (frag_more, frag_var, frag_variant, frag_wane): Likewise.
* input-file.c (input_file_push, input_file_pop): Likewise.
* input-scrub.c (input_scrub_push, input_scrub_next_buffer): Likewise.
* subsegs.c (subseg_change): Likewise.
* symbols.c (colon, symbol_table_insert, symbol_find_or_make)
(dollar_label_name, fb_label_name): Likewise.
* write.c (relax_align): Likewise.
* config/tc-alpha.c (s_alpha_pdesc): Likewise.
* config/tc-bfin.c (bfin_s_bss): Likewise.
* config/tc-i860.c (md_estimate_size_before_relax): Likewise.
* config/tc-m68hc11.c (md_convert_frag): Likewise.
* config/tc-m68k.c (m68k_ip, crack_operand): Likewise.
(md_convert_frag_1, s_even): Likewise.
* config/tc-mips.c (mips_clear_insn_labels): Likewise.
* config/tc-mn10200.c (md_begin): Likewise.
* config/tc-s390.c (s390_setup_opcodes, md_begin): Likewise.
* config/tc-sh.c (sh_elf_cons): Likewise.
* config/tc-tic4x.c (tic4x_cons, tic4x_stringer): Likewise.
* config/m68k-parse.y (m68k_reg_parse): Likewise. Convert from K&R.
(yylex, m68k_ip_op, yyerror): Convert from K&R.
2014-11-04 06:01:09 +01:00
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struct saved_file *saved = (struct saved_file *) arg;
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1999-05-03 09:29:11 +02:00
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2001-07-10 11:45:50 +02:00
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input_file_end (); /* Close out old file. */
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1999-05-03 09:29:11 +02:00
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f_in = saved->f_in;
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file_name = saved->file_name;
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preprocess = saved->preprocess;
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if (preprocess)
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app_pop (saved->app_save);
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free (arg);
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}
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2016-02-22 15:11:27 +01:00
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/* Open the specified file, "" means stdin. Filename must not be null. */
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1999-05-03 09:29:11 +02:00
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void
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2016-02-22 15:11:27 +01:00
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input_file_open (const char *filename,
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2003-11-24 04:37:58 +01:00
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int pre)
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1999-05-03 09:29:11 +02:00
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{
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int c;
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char buf[80];
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preprocess = pre;
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* gas/app, gas/as.c, gas/as.h, gas/atof-generic.c, gas/cgen.c,
gas/config/atof-ieee.c, gas/config/obj-aout.c,
gas/config/obj-coff.c, gas/config/obj-ecoff.c,
gas/config/obj-elf.c, gas/config/obj-som.c, gas/config/tc-alpha.c,
gas/config/tc-arc.c, gas/config/tc-arm.c, gas/config/tc-cr16.c,
gas/config/tc-cris.c, gas/config/tc-crx.c, gas/config/tc-d30v.c,
gas/config/tc-dlx.c, gas/config/tc-hppa.c, gas/config/tc-i370.c,
gas/config/tc-i386-intel.c, gas/config/tc-i386.c,
gas/config/tc-i860.c, gas/config/tc-i960.c, gas/config/tc-ia64.c,
gas/config/tc-iq2000.c, gas/config/tc-m32c.c,
gas/config/tc-m32r.c, gas/config/tc-m68hc11.c,
gas/config/tc-m68k.c, gas/config/tc-maxq.c, gas/config/tc-mcore.c,
gas/config/tc-mep.c, gas/config/tc-mips.c, gas/config/tc-mmix.c,
gas/config/tc-mn10300.c, gas/config/tc-moxie.c,
gas/config/tc-ns32k.c, gas/config/tc-pj.c, gas/config/tc-ppc.c,
gas/config/tc-s390.c, gas/config/tc-score.c,
gas/config/tc-score7.c, gas/config/tc-sh.c, gas/config/tc-sparc.c,
gas/config/tc-spu.c, gas/config/tc-tic30.c, gas/config/tc-vax.c,
gas/config/tc-xtensa.c, gas/config/xtensa-relax.c,
gas/dw2gencfi.c, gas/dwarf2dbg.c, gas/ehopt.c, gas/expr.c,
gas/frags.c, gas/input-file.c, gas/read.c, gas/sb.c,
gas/subsegs.c, gas/symbols.c, gas/write.c: Change the name of the
gas macro `assert' to `gas_assert'.
2009-06-22 19:56:02 +02:00
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gas_assert (filename != 0); /* Filename may not be NULL. */
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1999-05-03 09:29:11 +02:00
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if (filename[0])
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2003-11-07 13:19:34 +01:00
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{
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2001-07-10 11:45:50 +02:00
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f_in = fopen (filename, FOPEN_RT);
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1999-05-03 09:29:11 +02:00
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file_name = filename;
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}
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else
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2003-11-07 13:19:34 +01:00
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{
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/* Use stdin for the input file. */
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1999-05-03 09:29:11 +02:00
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f_in = stdin;
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2003-11-07 13:19:34 +01:00
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/* For error messages. */
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file_name = _("{standard input}");
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1999-05-03 09:29:11 +02:00
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}
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2003-11-07 13:19:34 +01:00
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2005-02-21 04:03:02 +01:00
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if (f_in == NULL)
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{
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2006-09-13 01:57:26 +02:00
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as_bad (_("can't open %s for reading: %s"),
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file_name, xstrerror (errno));
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2005-02-21 04:03:02 +01:00
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return;
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}
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2003-12-18 19:03:08 +01:00
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2005-02-21 04:03:02 +01:00
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c = getc (f_in);
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if (ferror (f_in))
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1999-05-03 09:29:11 +02:00
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{
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2006-09-13 01:57:26 +02:00
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as_bad (_("can't read from %s: %s"),
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file_name, xstrerror (errno));
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2003-12-18 19:03:08 +01:00
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2005-02-21 04:03:02 +01:00
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fclose (f_in);
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f_in = NULL;
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1999-05-03 09:29:11 +02:00
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return;
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}
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2010-11-17 12:15:21 +01:00
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/* Check for an empty input file. */
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if (feof (f_in))
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{
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fclose (f_in);
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f_in = NULL;
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return;
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}
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gas_assert (c != EOF);
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1999-05-03 09:29:11 +02:00
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if (c == '#')
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2001-07-10 11:45:50 +02:00
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{
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/* Begins with comment, may not want to preprocess. */
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1999-05-03 09:29:11 +02:00
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c = getc (f_in);
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if (c == 'N')
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2002-05-18 14:53:30 +02:00
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{
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2007-01-12 04:14:01 +01:00
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if (fgets (buf, sizeof (buf), f_in)
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&& !strncmp (buf, "O_APP", 5) && ISSPACE (buf[5]))
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2002-05-18 14:53:30 +02:00
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preprocess = 0;
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if (!strchr (buf, '\n'))
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ungetc ('#', f_in); /* It was longer. */
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else
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ungetc ('\n', f_in);
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}
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2001-09-26 22:32:17 +02:00
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else if (c == 'A')
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2002-05-18 14:53:30 +02:00
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{
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2007-01-12 04:14:01 +01:00
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if (fgets (buf, sizeof (buf), f_in)
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&& !strncmp (buf, "PP", 2) && ISSPACE (buf[2]))
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2002-05-18 14:53:30 +02:00
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preprocess = 1;
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if (!strchr (buf, '\n'))
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ungetc ('#', f_in);
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else
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ungetc ('\n', f_in);
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}
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1999-05-03 09:29:11 +02:00
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else if (c == '\n')
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2002-05-18 14:53:30 +02:00
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ungetc ('\n', f_in);
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1999-05-03 09:29:11 +02:00
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else
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2002-05-18 14:53:30 +02:00
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ungetc ('#', f_in);
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1999-05-03 09:29:11 +02:00
|
|
|
|
}
|
|
|
|
|
else
|
|
|
|
|
ungetc (c, f_in);
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Close input file. */
|
2001-07-10 11:45:50 +02:00
|
|
|
|
|
2000-09-09 22:23:15 +02:00
|
|
|
|
void
|
2003-11-24 04:37:58 +01:00
|
|
|
|
input_file_close (void)
|
1999-05-03 09:29:11 +02:00
|
|
|
|
{
|
2001-07-10 11:45:50 +02:00
|
|
|
|
/* Don't close a null file pointer. */
|
1999-05-03 09:29:11 +02:00
|
|
|
|
if (f_in != NULL)
|
2001-07-10 11:45:50 +02:00
|
|
|
|
fclose (f_in);
|
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
f_in = 0;
|
2000-11-06 22:55:46 +01:00
|
|
|
|
}
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
|
|
/* This function is passed to do_scrub_chars. */
|
|
|
|
|
|
PR gas/14201
* sb.h (sb_max_power_two): Delete.
(struct sb): Delete "item" and "pot". Make "len" a size_t. Add "max".
(sb_element): Delete.
(sb_add_char, sb_add_buffer, sb_skip_comma, sb_skip_write): Update
prototypes.
* sb.c (string_count, free_list): Delete.
(sb_build, sb_kill, sb_check): Rewrite.
(scrub_from_sb, sb_add_char, sb_add_string, sb_add_buffer,
sb_skip_white, sb_skip_comma): Replace assorted int params,
vars and return types with size_t.
* input-scrub.c: Likewise.
* macro.c: Likewise.
* macro.h: Likewise.
* as.c: Likewise.
* as.h: Likewise.
* input-file.h: Likewise.
* input-file.c: Likewise.
* read.c: Likewise.
* app.c: ..or ptrdiff_t.
* input-file.c (input_file_get): Use ferror.
(input_file_give_next_buffer): Use input_file_get.
2012-06-07 14:47:23 +02:00
|
|
|
|
static size_t
|
|
|
|
|
input_file_get (char *buf, size_t buflen)
|
1999-05-03 09:29:11 +02:00
|
|
|
|
{
|
PR gas/14201
* sb.h (sb_max_power_two): Delete.
(struct sb): Delete "item" and "pot". Make "len" a size_t. Add "max".
(sb_element): Delete.
(sb_add_char, sb_add_buffer, sb_skip_comma, sb_skip_write): Update
prototypes.
* sb.c (string_count, free_list): Delete.
(sb_build, sb_kill, sb_check): Rewrite.
(scrub_from_sb, sb_add_char, sb_add_string, sb_add_buffer,
sb_skip_white, sb_skip_comma): Replace assorted int params,
vars and return types with size_t.
* input-scrub.c: Likewise.
* macro.c: Likewise.
* macro.h: Likewise.
* as.c: Likewise.
* as.h: Likewise.
* input-file.h: Likewise.
* input-file.c: Likewise.
* read.c: Likewise.
* app.c: ..or ptrdiff_t.
* input-file.c (input_file_get): Use ferror.
(input_file_give_next_buffer): Use input_file_get.
2012-06-07 14:47:23 +02:00
|
|
|
|
size_t size;
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
2010-11-17 12:15:21 +01:00
|
|
|
|
if (feof (f_in))
|
|
|
|
|
return 0;
|
2013-01-10 20:51:55 +01:00
|
|
|
|
|
1999-06-03 02:24:14 +02:00
|
|
|
|
size = fread (buf, sizeof (char), buflen, f_in);
|
PR gas/14201
* sb.h (sb_max_power_two): Delete.
(struct sb): Delete "item" and "pot". Make "len" a size_t. Add "max".
(sb_element): Delete.
(sb_add_char, sb_add_buffer, sb_skip_comma, sb_skip_write): Update
prototypes.
* sb.c (string_count, free_list): Delete.
(sb_build, sb_kill, sb_check): Rewrite.
(scrub_from_sb, sb_add_char, sb_add_string, sb_add_buffer,
sb_skip_white, sb_skip_comma): Replace assorted int params,
vars and return types with size_t.
* input-scrub.c: Likewise.
* macro.c: Likewise.
* macro.h: Likewise.
* as.c: Likewise.
* as.h: Likewise.
* input-file.h: Likewise.
* input-file.c: Likewise.
* read.c: Likewise.
* app.c: ..or ptrdiff_t.
* input-file.c (input_file_get): Use ferror.
(input_file_give_next_buffer): Use input_file_get.
2012-06-07 14:47:23 +02:00
|
|
|
|
if (ferror (f_in))
|
|
|
|
|
as_bad (_("can't read from %s: %s"), file_name, xstrerror (errno));
|
1999-05-03 09:29:11 +02:00
|
|
|
|
return size;
|
|
|
|
|
}
|
|
|
|
|
|
|
|
|
|
/* Read a buffer from the input file. */
|
|
|
|
|
|
|
|
|
|
char *
|
2003-11-24 04:37:58 +01:00
|
|
|
|
input_file_give_next_buffer (char *where /* Where to place 1st character of new buffer. */)
|
1999-05-03 09:29:11 +02:00
|
|
|
|
{
|
2000-09-09 22:23:15 +02:00
|
|
|
|
char *return_value; /* -> Last char of what we read, + 1. */
|
PR gas/14201
* sb.h (sb_max_power_two): Delete.
(struct sb): Delete "item" and "pot". Make "len" a size_t. Add "max".
(sb_element): Delete.
(sb_add_char, sb_add_buffer, sb_skip_comma, sb_skip_write): Update
prototypes.
* sb.c (string_count, free_list): Delete.
(sb_build, sb_kill, sb_check): Rewrite.
(scrub_from_sb, sb_add_char, sb_add_string, sb_add_buffer,
sb_skip_white, sb_skip_comma): Replace assorted int params,
vars and return types with size_t.
* input-scrub.c: Likewise.
* macro.c: Likewise.
* macro.h: Likewise.
* as.c: Likewise.
* as.h: Likewise.
* input-file.h: Likewise.
* input-file.c: Likewise.
* read.c: Likewise.
* app.c: ..or ptrdiff_t.
* input-file.c (input_file_get): Use ferror.
(input_file_give_next_buffer): Use input_file_get.
2012-06-07 14:47:23 +02:00
|
|
|
|
size_t size;
|
1999-05-03 09:29:11 +02:00
|
|
|
|
|
|
|
|
|
if (f_in == (FILE *) 0)
|
|
|
|
|
return 0;
|
2001-07-10 11:45:50 +02:00
|
|
|
|
/* fflush (stdin); could be done here if you want to synchronise
|
|
|
|
|
stdin and stdout, for the case where our input file is stdin.
|
|
|
|
|
Since the assembler shouldn't do any output to stdout, we
|
|
|
|
|
don't bother to synch output and input. */
|
1999-05-03 09:29:11 +02:00
|
|
|
|
if (preprocess)
|
|
|
|
|
size = do_scrub_chars (input_file_get, where, BUFFER_SIZE);
|
|
|
|
|
else
|
PR gas/14201
* sb.h (sb_max_power_two): Delete.
(struct sb): Delete "item" and "pot". Make "len" a size_t. Add "max".
(sb_element): Delete.
(sb_add_char, sb_add_buffer, sb_skip_comma, sb_skip_write): Update
prototypes.
* sb.c (string_count, free_list): Delete.
(sb_build, sb_kill, sb_check): Rewrite.
(scrub_from_sb, sb_add_char, sb_add_string, sb_add_buffer,
sb_skip_white, sb_skip_comma): Replace assorted int params,
vars and return types with size_t.
* input-scrub.c: Likewise.
* macro.c: Likewise.
* macro.h: Likewise.
* as.c: Likewise.
* as.h: Likewise.
* input-file.h: Likewise.
* input-file.c: Likewise.
* read.c: Likewise.
* app.c: ..or ptrdiff_t.
* input-file.c (input_file_get): Use ferror.
(input_file_give_next_buffer): Use input_file_get.
2012-06-07 14:47:23 +02:00
|
|
|
|
size = input_file_get (where, BUFFER_SIZE);
|
2010-11-17 12:15:21 +01:00
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
if (size)
|
|
|
|
|
return_value = where + size;
|
|
|
|
|
else
|
|
|
|
|
{
|
|
|
|
|
if (fclose (f_in))
|
2006-09-13 12:15:59 +02:00
|
|
|
|
as_warn (_("can't close %s: %s"), file_name, xstrerror (errno));
|
2006-09-13 01:57:26 +02:00
|
|
|
|
|
1999-05-03 09:29:11 +02:00
|
|
|
|
f_in = (FILE *) 0;
|
|
|
|
|
return_value = 0;
|
|
|
|
|
}
|
2001-07-10 11:45:50 +02:00
|
|
|
|
|
|
|
|
|
return return_value;
|
1999-05-03 09:29:11 +02:00
|
|
|
|
}
|