2 Copyright (C) 2000-2019 Free Software Foundation, Inc.
3 Contributed by Andy Vaught
5 This file is part of GCC.
7 GCC is free software; you can redistribute it and/or modify it under
8 the terms of the GNU General Public License as published by the Free
9 Software Foundation; either version 3, or (at your option) any later
12 GCC is distributed in the hope that it will be useful, but WITHOUT ANY
13 WARRANTY; without even the implied warranty of MERCHANTABILITY or
14 FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public License
17 You should have received a copy of the GNU General Public License
18 along with GCC; see the file COPYING3. If not see
19 <http://www.gnu.org/licenses/>. */
21 /* Set of subroutines to (ultimately) return the next character to the
22 various matching subroutines. This file's job is to read files and
23 build up lines that are parsed by the parser. This means that we
24 handle continuation lines and "include" lines.
26 The first thing the scanner does is to load an entire file into
27 memory. We load the entire file into memory for a couple reasons.
28 The first is that we want to be able to deal with nonseekable input
29 (pipes, stdin) and there is a lot of backing up involved during
32 The second is that we want to be able to print the locus of errors,
33 and an error on line 999999 could conflict with something on line
34 one. Given nonseekable input, we've got to store the whole thing.
36 One thing that helps are the column truncation limits that give us
37 an upper bound on the size of individual lines. We don't store the
40 From the scanner's viewpoint, the higher level subroutines ask for
41 new characters and do a lot of jumping backwards. */
45 #include "coretypes.h"
47 #include "toplev.h" /* For set_src_pwd. */
53 /* List of include file search directories. */
54 gfc_directorylist
*include_dirs
, *intrinsic_modules_dirs
;
56 static gfc_file
*file_head
, *current_file
;
58 static int continue_flag
, end_flag
, gcc_attribute_flag
;
59 /* If !$omp/!$acc occurred in current comment line. */
60 static int openmp_flag
, openacc_flag
;
61 static int continue_count
, continue_line
;
62 static locus openmp_locus
;
63 static locus openacc_locus
;
64 static locus gcc_attribute_locus
;
66 gfc_source_form gfc_current_form
;
67 static gfc_linebuf
*line_head
, *line_tail
;
69 locus gfc_current_locus
;
70 const char *gfc_source_file
;
71 static FILE *gfc_src_file
;
72 static gfc_char_t
*gfc_src_preprocessor_lines
[2];
74 static struct gfc_file_change
80 size_t file_changes_cur
, file_changes_count
;
81 size_t file_changes_allocated
;
83 static gfc_char_t
*last_error_char
;
85 /* Functions dealing with our wide characters (gfc_char_t) and
86 sequences of such characters. */
89 gfc_wide_fits_in_byte (gfc_char_t c
)
91 return (c
<= UCHAR_MAX
);
95 wide_is_ascii (gfc_char_t c
)
97 return (gfc_wide_fits_in_byte (c
) && ((unsigned char) c
& ~0x7f) == 0);
101 gfc_wide_is_printable (gfc_char_t c
)
103 return (gfc_wide_fits_in_byte (c
) && ISPRINT ((unsigned char) c
));
107 gfc_wide_tolower (gfc_char_t c
)
109 return (wide_is_ascii (c
) ? (gfc_char_t
) TOLOWER((unsigned char) c
) : c
);
113 gfc_wide_toupper (gfc_char_t c
)
115 return (wide_is_ascii (c
) ? (gfc_char_t
) TOUPPER((unsigned char) c
) : c
);
119 gfc_wide_is_digit (gfc_char_t c
)
121 return (c
>= '0' && c
<= '9');
125 wide_atoi (gfc_char_t
*c
)
127 #define MAX_DIGITS 20
128 char buf
[MAX_DIGITS
+1];
131 while (gfc_wide_is_digit(*c
) && i
< MAX_DIGITS
)
138 gfc_wide_strlen (const gfc_char_t
*str
)
142 for (i
= 0; str
[i
]; i
++)
149 gfc_wide_memset (gfc_char_t
*b
, gfc_char_t c
, size_t len
)
153 for (i
= 0; i
< len
; i
++)
160 wide_strcpy (gfc_char_t
*dest
, const gfc_char_t
*src
)
164 for (d
= dest
; (*d
= *src
) != '\0'; ++src
, ++d
)
171 wide_strchr (const gfc_char_t
*s
, gfc_char_t c
)
176 return CONST_CAST(gfc_char_t
*, s
);
183 gfc_widechar_to_char (const gfc_char_t
*s
, int length
)
191 /* Passing a negative length is used to indicate that length should be
192 calculated using gfc_wide_strlen(). */
193 len
= (length
>= 0 ? (size_t) length
: gfc_wide_strlen (s
));
194 res
= XNEWVEC (char, len
+ 1);
196 for (i
= 0; i
< len
; i
++)
198 gcc_assert (gfc_wide_fits_in_byte (s
[i
]));
199 res
[i
] = (unsigned char) s
[i
];
207 gfc_char_to_widechar (const char *s
)
216 res
= gfc_get_wide_string (len
+ 1);
218 for (i
= 0; i
< len
; i
++)
219 res
[i
] = (unsigned char) s
[i
];
226 wide_strncmp (const gfc_char_t
*s1
, const char *s2
, size_t n
)
235 return (c1
> c2
? 1 : -1);
243 gfc_wide_strncasecmp (const gfc_char_t
*s1
, const char *s2
, size_t n
)
249 c1
= gfc_wide_tolower (*s1
++);
250 c2
= TOLOWER (*s2
++);
252 return (c1
> c2
? 1 : -1);
260 /* Main scanner initialization. */
263 gfc_scanner_init_1 (void)
273 last_error_char
= NULL
;
277 /* Main scanner destructor. */
280 gfc_scanner_done_1 (void)
285 while(line_head
!= NULL
)
287 lb
= line_head
->next
;
292 while(file_head
!= NULL
)
295 free (file_head
->filename
);
302 /* Adds path to the list pointed to by list. */
305 add_path_to_list (gfc_directorylist
**list
, const char *path
,
306 bool use_for_modules
, bool head
, bool warn
)
308 gfc_directorylist
*dir
;
316 while (*p
== ' ' || *p
== '\t') /* someone might do "-I include" */
320 /* Strip trailing directory separators from the path, as this
321 will confuse Windows systems. */
323 q
= (char *) alloca (len
+ 1);
324 memcpy (q
, p
, len
+ 1);
326 while (i
>=0 && IS_DIR_SEPARATOR (q
[i
]))
332 gfc_warning_now (0, "Include directory %qs: %s", path
,
335 gfc_warning_now (OPT_Wmissing_include_dirs
,
336 "Nonexistent include directory %qs", path
);
339 else if (!S_ISDIR (st
.st_mode
))
341 gfc_fatal_error ("%qs is not a directory", path
);
345 if (head
|| *list
== NULL
)
347 dir
= XCNEW (gfc_directorylist
);
357 dir
->next
= XCNEW (gfc_directorylist
);
361 dir
->next
= head
? *list
: NULL
;
364 dir
->use_for_modules
= use_for_modules
;
365 dir
->path
= XCNEWVEC (char, strlen (p
) + 2);
366 strcpy (dir
->path
, p
);
367 strcat (dir
->path
, "/"); /* make '/' last character */
372 gfc_add_include_path (const char *path
, bool use_for_modules
, bool file_dir
,
375 add_path_to_list (&include_dirs
, path
, use_for_modules
, file_dir
, warn
);
377 /* For '#include "..."' these directories are automatically searched. */
379 gfc_cpp_add_include_path (xstrdup(path
), true);
384 gfc_add_intrinsic_modules_path (const char *path
)
386 add_path_to_list (&intrinsic_modules_dirs
, path
, true, false, false);
390 /* Release resources allocated for options. */
393 gfc_release_include_path (void)
395 gfc_directorylist
*p
;
397 while (include_dirs
!= NULL
)
400 include_dirs
= include_dirs
->next
;
405 while (intrinsic_modules_dirs
!= NULL
)
407 p
= intrinsic_modules_dirs
;
408 intrinsic_modules_dirs
= intrinsic_modules_dirs
->next
;
413 free (gfc_option
.module_dir
);
418 open_included_file (const char *name
, gfc_directorylist
*list
,
419 bool module
, bool system
)
422 gfc_directorylist
*p
;
425 for (p
= list
; p
; p
= p
->next
)
427 if (module
&& !p
->use_for_modules
)
430 fullname
= (char *) alloca(strlen (p
->path
) + strlen (name
) + 1);
431 strcpy (fullname
, p
->path
);
432 strcat (fullname
, name
);
434 f
= gfc_open_file (fullname
);
437 if (gfc_cpp_makedep ())
438 gfc_cpp_add_dep (fullname
, system
);
448 /* Opens file for reading, searching through the include directories
449 given if necessary. If the include_cwd argument is true, we try
450 to open the file in the current directory first. */
453 gfc_open_included_file (const char *name
, bool include_cwd
, bool module
)
457 if (IS_ABSOLUTE_PATH (name
) || include_cwd
)
459 f
= gfc_open_file (name
);
460 if (f
&& gfc_cpp_makedep ())
461 gfc_cpp_add_dep (name
, false);
465 f
= open_included_file (name
, include_dirs
, module
, false);
471 /* Test to see if we're at the end of the main source file. */
480 /* Test to see if we're at the end of the current file. */
488 if (line_head
== NULL
)
489 return 1; /* Null file */
491 if (gfc_current_locus
.lb
== NULL
)
498 /* Test to see if we're at the beginning of a new line. */
506 return (gfc_current_locus
.nextc
== gfc_current_locus
.lb
->line
);
510 /* Test to see if we're at the end of a line. */
518 return (*gfc_current_locus
.nextc
== '\0');
522 add_file_change (const char *filename
, int line
)
524 if (file_changes_count
== file_changes_allocated
)
526 if (file_changes_allocated
)
527 file_changes_allocated
*= 2;
529 file_changes_allocated
= 16;
530 file_changes
= XRESIZEVEC (struct gfc_file_change
, file_changes
,
531 file_changes_allocated
);
533 file_changes
[file_changes_count
].filename
= filename
;
534 file_changes
[file_changes_count
].lb
= NULL
;
535 file_changes
[file_changes_count
++].line
= line
;
539 report_file_change (gfc_linebuf
*lb
)
541 size_t c
= file_changes_cur
;
542 while (c
< file_changes_count
543 && file_changes
[c
].lb
== lb
)
545 if (file_changes
[c
].filename
)
546 (*debug_hooks
->start_source_file
) (file_changes
[c
].line
,
547 file_changes
[c
].filename
);
549 (*debug_hooks
->end_source_file
) (file_changes
[c
].line
);
552 file_changes_cur
= c
;
556 gfc_start_source_files (void)
558 /* If the debugger wants the name of the main source file,
560 if (debug_hooks
->start_end_main_source_file
)
561 (*debug_hooks
->start_source_file
) (0, gfc_source_file
);
563 file_changes_cur
= 0;
564 report_file_change (gfc_current_locus
.lb
);
568 gfc_end_source_files (void)
570 report_file_change (NULL
);
572 if (debug_hooks
->start_end_main_source_file
)
573 (*debug_hooks
->end_source_file
) (0);
576 /* Advance the current line pointer to the next line. */
579 gfc_advance_line (void)
584 if (gfc_current_locus
.lb
== NULL
)
590 if (gfc_current_locus
.lb
->next
591 && !gfc_current_locus
.lb
->next
->dbg_emitted
)
593 report_file_change (gfc_current_locus
.lb
->next
);
594 gfc_current_locus
.lb
->next
->dbg_emitted
= true;
597 gfc_current_locus
.lb
= gfc_current_locus
.lb
->next
;
599 if (gfc_current_locus
.lb
!= NULL
)
600 gfc_current_locus
.nextc
= gfc_current_locus
.lb
->line
;
603 gfc_current_locus
.nextc
= NULL
;
609 /* Get the next character from the input, advancing gfc_current_file's
610 locus. When we hit the end of the line or the end of the file, we
611 start returning a '\n' in order to complete the current statement.
612 No Fortran line conventions are implemented here.
614 Requiring explicit advances to the next line prevents the parse
615 pointer from being on the wrong line if the current statement ends
623 if (gfc_current_locus
.nextc
== NULL
)
626 c
= *gfc_current_locus
.nextc
++;
629 gfc_current_locus
.nextc
--; /* Remain on this line. */
637 /* Skip a comment. When we come here the parse pointer is positioned
638 immediately after the comment character. If we ever implement
639 compiler directives within comments, here is where we parse the
643 skip_comment_line (void)
658 gfc_define_undef_line (void)
662 /* All lines beginning with '#' are either #define or #undef. */
663 if (debug_info_level
!= DINFO_LEVEL_VERBOSE
|| gfc_peek_ascii_char () != '#')
666 if (wide_strncmp (gfc_current_locus
.nextc
, "#define ", 8) == 0)
668 tmp
= gfc_widechar_to_char (&gfc_current_locus
.nextc
[8], -1);
669 (*debug_hooks
->define
) (gfc_linebuf_linenum (gfc_current_locus
.lb
),
674 if (wide_strncmp (gfc_current_locus
.nextc
, "#undef ", 7) == 0)
676 tmp
= gfc_widechar_to_char (&gfc_current_locus
.nextc
[7], -1);
677 (*debug_hooks
->undef
) (gfc_linebuf_linenum (gfc_current_locus
.lb
),
682 /* Skip the rest of the line. */
683 skip_comment_line ();
689 /* Return true if GCC$ was matched. */
691 skip_gcc_attribute (locus start
)
695 locus old_loc
= gfc_current_locus
;
697 if ((c
= next_char ()) == 'g' || c
== 'G')
698 if ((c
= next_char ()) == 'c' || c
== 'C')
699 if ((c
= next_char ()) == 'c' || c
== 'C')
700 if ((c
= next_char ()) == '$')
704 gfc_current_locus
= old_loc
;
707 gcc_attribute_flag
= 1;
708 gcc_attribute_locus
= old_loc
;
709 gfc_current_locus
= start
;
715 /* Return true if CC was matched. */
717 skip_free_oacc_sentinel (locus start
, locus old_loc
)
722 if ((c
= next_char ()) == 'c' || c
== 'C')
723 if ((c
= next_char ()) == 'c' || c
== 'C')
728 if ((c
= next_char ()) == ' ' || c
== '\t'
731 while (gfc_is_whitespace (c
))
733 if (c
!= '\n' && c
!= '!')
736 openacc_locus
= old_loc
;
737 gfc_current_locus
= start
;
744 gfc_warning_now (0, "!$ACC at %C starts a commented "
745 "line as it neither is followed "
746 "by a space nor is a "
747 "continuation line");
755 /* Return true if MP was matched. */
757 skip_free_omp_sentinel (locus start
, locus old_loc
)
762 if ((c
= next_char ()) == 'm' || c
== 'M')
763 if ((c
= next_char ()) == 'p' || c
== 'P')
768 if ((c
= next_char ()) == ' ' || c
== '\t'
771 while (gfc_is_whitespace (c
))
773 if (c
!= '\n' && c
!= '!')
776 openmp_locus
= old_loc
;
777 gfc_current_locus
= start
;
784 gfc_warning_now (0, "!$OMP at %C starts a commented "
785 "line as it neither is followed "
786 "by a space nor is a "
787 "continuation line");
795 /* Comment lines are null lines, lines containing only blanks or lines
796 on which the first nonblank line is a '!'.
797 Return true if !$ openmp or openacc conditional compilation sentinel was
801 skip_free_comments (void)
809 at_bol
= gfc_at_bol ();
810 start
= gfc_current_locus
;
816 while (gfc_is_whitespace (c
));
826 /* Keep the !GCC$ line. */
827 if (at_bol
&& skip_gcc_attribute (start
))
830 /* If -fopenmp/-fopenacc, we need to handle here 2 things:
831 1) don't treat !$omp/!$acc as comments, but directives
832 2) handle OpenMP/OpenACC conditional compilation, where
833 !$ should be treated as 2 spaces (for initial lines
834 only if followed by space). */
837 if ((flag_openmp
|| flag_openmp_simd
)
840 locus old_loc
= gfc_current_locus
;
841 if (next_char () == '$')
844 if (c
== 'o' || c
== 'O')
846 if (skip_free_omp_sentinel (start
, old_loc
))
848 gfc_current_locus
= old_loc
;
852 else if (c
== 'a' || c
== 'A')
854 if (skip_free_oacc_sentinel (start
, old_loc
))
856 gfc_current_locus
= old_loc
;
860 if (continue_flag
|| c
== ' ' || c
== '\t')
862 gfc_current_locus
= old_loc
;
864 openmp_flag
= openacc_flag
= 0;
868 gfc_current_locus
= old_loc
;
870 else if ((flag_openmp
|| flag_openmp_simd
)
873 locus old_loc
= gfc_current_locus
;
874 if (next_char () == '$')
877 if (c
== 'o' || c
== 'O')
879 if (skip_free_omp_sentinel (start
, old_loc
))
881 gfc_current_locus
= old_loc
;
885 if (continue_flag
|| c
== ' ' || c
== '\t')
887 gfc_current_locus
= old_loc
;
893 gfc_current_locus
= old_loc
;
895 else if (flag_openacc
896 && !(flag_openmp
|| flag_openmp_simd
))
898 locus old_loc
= gfc_current_locus
;
899 if (next_char () == '$')
902 if (c
== 'a' || c
== 'A')
904 if (skip_free_oacc_sentinel (start
, old_loc
))
906 gfc_current_locus
= old_loc
;
910 if (continue_flag
|| c
== ' ' || c
== '\t')
912 gfc_current_locus
= old_loc
;
918 gfc_current_locus
= old_loc
;
921 skip_comment_line ();
928 if (openmp_flag
&& at_bol
)
931 if (openacc_flag
&& at_bol
)
934 gcc_attribute_flag
= 0;
935 gfc_current_locus
= start
;
939 /* Return true if MP was matched in fixed form. */
941 skip_fixed_omp_sentinel (locus
*start
)
944 if (((c
= next_char ()) == 'm' || c
== 'M')
945 && ((c
= next_char ()) == 'p' || c
== 'P'))
950 || c
== ' ' || c
== '\t' || c
== '0'))
954 while (gfc_is_whitespace (c
));
955 if (c
!= '\n' && c
!= '!')
957 /* Canonicalize to *$omp. */
960 gfc_current_locus
= *start
;
968 /* Return true if CC was matched in fixed form. */
970 skip_fixed_oacc_sentinel (locus
*start
)
973 if (((c
= next_char ()) == 'c' || c
== 'C')
974 && ((c
= next_char ()) == 'c' || c
== 'C'))
979 || c
== ' ' || c
== '\t' || c
== '0'))
983 while (gfc_is_whitespace (c
));
984 if (c
!= '\n' && c
!= '!')
986 /* Canonicalize to *$acc. */
989 gfc_current_locus
= *start
;
997 /* Skip comment lines in fixed source mode. We have the same rules as
998 in skip_free_comment(), except that we can have a 'c', 'C' or '*'
999 in column 1, and a '!' cannot be in column 6. Also, we deal with
1000 lines with 'd' or 'D' in column 1, if the user requested this. */
1003 skip_fixed_comments (void)
1009 if (! gfc_at_bol ())
1011 start
= gfc_current_locus
;
1012 if (! gfc_at_eof ())
1016 while (gfc_is_whitespace (c
));
1019 gfc_advance_line ();
1021 skip_comment_line ();
1024 if (! gfc_at_bol ())
1026 gfc_current_locus
= start
;
1033 start
= gfc_current_locus
;
1040 gfc_advance_line ();
1044 if (c
== '!' || c
== 'c' || c
== 'C' || c
== '*')
1046 if (skip_gcc_attribute (start
))
1048 /* Canonicalize to *$omp. */
1053 /* If -fopenmp/-fopenacc, we need to handle here 2 things:
1054 1) don't treat !$omp/!$acc|c$omp/c$acc|*$omp / *$acc as comments,
1056 2) handle OpenMP/OpenACC conditional compilation, where
1057 !$|c$|*$ should be treated as 2 spaces if the characters
1058 in columns 3 to 6 are valid fixed form label columns
1060 if (gfc_current_locus
.lb
!= NULL
1061 && continue_line
< gfc_linebuf_linenum (gfc_current_locus
.lb
))
1062 continue_line
= gfc_linebuf_linenum (gfc_current_locus
.lb
);
1064 if ((flag_openmp
|| flag_openmp_simd
) && !flag_openacc
)
1066 if (next_char () == '$')
1069 if (c
== 'o' || c
== 'O')
1071 if (skip_fixed_omp_sentinel (&start
))
1075 goto check_for_digits
;
1077 gfc_current_locus
= start
;
1080 if (flag_openacc
&& !(flag_openmp
|| flag_openmp_simd
))
1082 if (next_char () == '$')
1085 if (c
== 'a' || c
== 'A')
1087 if (skip_fixed_oacc_sentinel (&start
))
1091 goto check_for_digits
;
1093 gfc_current_locus
= start
;
1096 if (flag_openacc
|| flag_openmp
|| flag_openmp_simd
)
1098 if (next_char () == '$')
1101 if (c
== 'a' || c
== 'A')
1103 if (skip_fixed_oacc_sentinel (&start
))
1106 else if (c
== 'o' || c
== 'O')
1108 if (skip_fixed_omp_sentinel (&start
))
1112 goto check_for_digits
;
1114 gfc_current_locus
= start
;
1117 skip_comment_line ();
1125 for (col
= 3; col
< 6; col
++, c
= next_char ())
1133 else if (c
< '0' || c
> '9')
1138 if (col
== 6 && c
!= '\n'
1139 && ((continue_flag
&& !digit_seen
)
1140 || c
== ' ' || c
== '\t' || c
== '0'))
1142 gfc_current_locus
= start
;
1143 start
.nextc
[0] = ' ';
1144 start
.nextc
[1] = ' ';
1148 skip_comment_line ();
1152 if (gfc_option
.flag_d_lines
!= -1 && (c
== 'd' || c
== 'D'))
1154 if (gfc_option
.flag_d_lines
== 0)
1156 skip_comment_line ();
1160 *start
.nextc
= c
= ' ';
1165 while (gfc_is_whitespace (c
))
1173 gfc_advance_line ();
1177 if (col
!= 6 && c
== '!')
1179 if (gfc_current_locus
.lb
!= NULL
1180 && continue_line
< gfc_linebuf_linenum (gfc_current_locus
.lb
))
1181 continue_line
= gfc_linebuf_linenum (gfc_current_locus
.lb
);
1182 skip_comment_line ();
1191 gcc_attribute_flag
= 0;
1192 gfc_current_locus
= start
;
1196 /* Skips the current line if it is a comment. */
1199 gfc_skip_comments (void)
1201 if (gfc_current_form
== FORM_FREE
)
1202 skip_free_comments ();
1204 skip_fixed_comments ();
1208 /* Get the next character from the input, taking continuation lines
1209 and end-of-line comments into account. This implies that comment
1210 lines between continued lines must be eaten here. For higher-level
1211 subroutines, this flattens continued lines into a single logical
1212 line. The in_string flag denotes whether we're inside a character
1216 gfc_next_char_literal (gfc_instring in_string
)
1219 int i
, prev_openmp_flag
, prev_openacc_flag
;
1223 prev_openacc_flag
= prev_openmp_flag
= 0;
1233 if (gfc_current_form
== FORM_FREE
)
1235 bool openmp_cond_flag
;
1237 if (!in_string
&& c
== '!')
1239 if (gcc_attribute_flag
1240 && memcmp (&gfc_current_locus
, &gcc_attribute_locus
,
1241 sizeof (gfc_current_locus
)) == 0)
1245 && memcmp (&gfc_current_locus
, &openmp_locus
,
1246 sizeof (gfc_current_locus
)) == 0)
1250 && memcmp (&gfc_current_locus
, &openacc_locus
,
1251 sizeof (gfc_current_locus
)) == 0)
1254 /* This line can't be continued */
1261 /* Avoid truncation warnings for comment ending lines. */
1262 gfc_current_locus
.lb
->truncated
= 0;
1267 /* Check to see if the continuation line was truncated. */
1268 if (warn_line_truncation
&& gfc_current_locus
.lb
!= NULL
1269 && gfc_current_locus
.lb
->truncated
)
1271 int maxlen
= flag_free_line_length
;
1272 gfc_char_t
*current_nextc
= gfc_current_locus
.nextc
;
1274 gfc_current_locus
.lb
->truncated
= 0;
1275 gfc_current_locus
.nextc
= gfc_current_locus
.lb
->line
+ maxlen
;
1276 gfc_warning_now (OPT_Wline_truncation
,
1277 "Line truncated at %L", &gfc_current_locus
);
1278 gfc_current_locus
.nextc
= current_nextc
;
1284 /* If the next nonblank character is a ! or \n, we've got a
1285 continuation line. */
1286 old_loc
= gfc_current_locus
;
1289 while (gfc_is_whitespace (c
))
1292 /* Character constants to be continued cannot have commentary
1293 after the '&'. However, there are cases where we may think we
1294 are still in a string and we are looking for a possible
1295 doubled quote and we end up here. See PR64506. */
1297 if (in_string
&& c
!= '\n')
1299 gfc_current_locus
= old_loc
;
1304 if (c
!= '!' && c
!= '\n')
1306 gfc_current_locus
= old_loc
;
1312 prev_openmp_flag
= openmp_flag
;
1314 prev_openacc_flag
= openacc_flag
;
1318 skip_comment_line ();
1320 gfc_advance_line ();
1323 goto not_continuation
;
1325 /* We've got a continuation line. If we are on the very next line after
1326 the last continuation, increment the continuation line count and
1327 check whether the limit has been exceeded. */
1328 if (gfc_linebuf_linenum (gfc_current_locus
.lb
) == continue_line
+ 1)
1330 if (++continue_count
== gfc_option
.max_continue_free
)
1332 if (gfc_notification_std (GFC_STD_GNU
) || pedantic
)
1333 gfc_warning (0, "Limit of %d continuations exceeded in "
1334 "statement at %C", gfc_option
.max_continue_free
);
1338 /* Now find where it continues. First eat any comment lines. */
1339 openmp_cond_flag
= skip_free_comments ();
1341 if (gfc_current_locus
.lb
!= NULL
1342 && continue_line
< gfc_linebuf_linenum (gfc_current_locus
.lb
))
1343 continue_line
= gfc_linebuf_linenum (gfc_current_locus
.lb
);
1346 if (prev_openmp_flag
!= openmp_flag
&& !openacc_flag
)
1348 gfc_current_locus
= old_loc
;
1349 openmp_flag
= prev_openmp_flag
;
1355 if (prev_openacc_flag
!= openacc_flag
&& !openmp_flag
)
1357 gfc_current_locus
= old_loc
;
1358 openacc_flag
= prev_openacc_flag
;
1363 /* Now that we have a non-comment line, probe ahead for the
1364 first non-whitespace character. If it is another '&', then
1365 reading starts at the next character, otherwise we must back
1366 up to where the whitespace started and resume from there. */
1368 old_loc
= gfc_current_locus
;
1371 while (gfc_is_whitespace (c
))
1374 if (openmp_flag
&& !openacc_flag
)
1376 for (i
= 0; i
< 5; i
++, c
= next_char ())
1378 gcc_assert (gfc_wide_tolower (c
) == (unsigned char) "!$omp"[i
]);
1380 old_loc
= gfc_current_locus
;
1382 while (gfc_is_whitespace (c
))
1385 if (openacc_flag
&& !openmp_flag
)
1387 for (i
= 0; i
< 5; i
++, c
= next_char ())
1389 gcc_assert (gfc_wide_tolower (c
) == (unsigned char) "!$acc"[i
]);
1391 old_loc
= gfc_current_locus
;
1393 while (gfc_is_whitespace (c
))
1397 /* In case we have an OpenMP directive continued by OpenACC
1398 sentinel, or vice versa, we get both openmp_flag and
1401 if (openacc_flag
&& openmp_flag
)
1404 for (i
= 0; i
< 5; i
++, c
= next_char ())
1406 if (gfc_wide_tolower (c
) != (unsigned char) "!$acc"[i
])
1409 old_loc
= gfc_current_locus
;
1411 gfc_error (is_openmp
1412 ? G_("Wrong OpenACC continuation at %C: "
1413 "expected !$ACC, got !$OMP")
1414 : G_("Wrong OpenMP continuation at %C: "
1415 "expected !$OMP, got !$ACC"));
1420 if (in_string
&& gfc_current_locus
.nextc
)
1422 gfc_current_locus
.nextc
--;
1423 if (warn_ampersand
&& in_string
== INSTRING_WARN
)
1424 gfc_warning (OPT_Wampersand
,
1425 "Missing %<&%> in continued character "
1428 else if (!in_string
&& (c
== '\'' || c
== '"'))
1430 /* Both !$omp and !$ -fopenmp continuation lines have & on the
1431 continuation line only optionally. */
1432 else if (openmp_flag
|| openacc_flag
|| openmp_cond_flag
)
1434 if (gfc_current_locus
.nextc
)
1435 gfc_current_locus
.nextc
--;
1440 gfc_current_locus
= old_loc
;
1445 else /* Fixed form. */
1447 /* Fixed form continuation. */
1448 if (in_string
!= INSTRING_WARN
&& c
== '!')
1450 /* Skip comment at end of line. */
1457 /* Avoid truncation warnings for comment ending lines. */
1458 gfc_current_locus
.lb
->truncated
= 0;
1464 /* Check to see if the continuation line was truncated. */
1465 if (warn_line_truncation
&& gfc_current_locus
.lb
!= NULL
1466 && gfc_current_locus
.lb
->truncated
)
1468 gfc_current_locus
.lb
->truncated
= 0;
1469 gfc_warning_now (OPT_Wline_truncation
,
1470 "Line truncated at %L", &gfc_current_locus
);
1474 prev_openmp_flag
= openmp_flag
;
1476 prev_openacc_flag
= openacc_flag
;
1479 old_loc
= gfc_current_locus
;
1481 gfc_advance_line ();
1482 skip_fixed_comments ();
1484 /* See if this line is a continuation line. */
1485 if (flag_openmp
&& openmp_flag
!= prev_openmp_flag
&& !openacc_flag
)
1487 openmp_flag
= prev_openmp_flag
;
1488 goto not_continuation
;
1490 if (flag_openacc
&& openacc_flag
!= prev_openacc_flag
&& !openmp_flag
)
1492 openacc_flag
= prev_openacc_flag
;
1493 goto not_continuation
;
1496 /* In case we have an OpenMP directive continued by OpenACC
1497 sentinel, or vice versa, we get both openmp_flag and
1499 if (openacc_flag
&& openmp_flag
)
1502 for (i
= 0; i
< 5; i
++)
1505 if (gfc_wide_tolower (c
) != (unsigned char) "*$acc"[i
])
1508 gfc_error (is_openmp
1509 ? G_("Wrong OpenACC continuation at %C: "
1510 "expected !$ACC, got !$OMP")
1511 : G_("Wrong OpenMP continuation at %C: "
1512 "expected !$OMP, got !$ACC"));
1514 else if (!openmp_flag
&& !openacc_flag
)
1515 for (i
= 0; i
< 5; i
++)
1519 goto not_continuation
;
1521 else if (openmp_flag
)
1522 for (i
= 0; i
< 5; i
++)
1525 if (gfc_wide_tolower (c
) != (unsigned char) "*$omp"[i
])
1526 goto not_continuation
;
1528 else if (openacc_flag
)
1529 for (i
= 0; i
< 5; i
++)
1532 if (gfc_wide_tolower (c
) != (unsigned char) "*$acc"[i
])
1533 goto not_continuation
;
1537 if (c
== '0' || c
== ' ' || c
== '\n')
1538 goto not_continuation
;
1540 /* We've got a continuation line. If we are on the very next line after
1541 the last continuation, increment the continuation line count and
1542 check whether the limit has been exceeded. */
1543 if (gfc_linebuf_linenum (gfc_current_locus
.lb
) == continue_line
+ 1)
1545 if (++continue_count
== gfc_option
.max_continue_fixed
)
1547 if (gfc_notification_std (GFC_STD_GNU
) || pedantic
)
1548 gfc_warning (0, "Limit of %d continuations exceeded in "
1550 gfc_option
.max_continue_fixed
);
1554 if (gfc_current_locus
.lb
!= NULL
1555 && continue_line
< gfc_linebuf_linenum (gfc_current_locus
.lb
))
1556 continue_line
= gfc_linebuf_linenum (gfc_current_locus
.lb
);
1559 /* Ready to read first character of continuation line, which might
1560 be another continuation line! */
1565 gfc_current_locus
= old_loc
;
1576 /* Get the next character of input, folded to lowercase. In fixed
1577 form mode, we also ignore spaces. When matcher subroutines are
1578 parsing character literals, they have to call
1579 gfc_next_char_literal(). */
1582 gfc_next_char (void)
1588 c
= gfc_next_char_literal (NONSTRING
);
1590 while (gfc_current_form
== FORM_FIXED
&& gfc_is_whitespace (c
));
1592 return gfc_wide_tolower (c
);
1596 gfc_next_ascii_char (void)
1598 gfc_char_t c
= gfc_next_char ();
1600 return (gfc_wide_fits_in_byte (c
) ? (unsigned char) c
1601 : (unsigned char) UCHAR_MAX
);
1606 gfc_peek_char (void)
1611 old_loc
= gfc_current_locus
;
1612 c
= gfc_next_char ();
1613 gfc_current_locus
= old_loc
;
1620 gfc_peek_ascii_char (void)
1622 gfc_char_t c
= gfc_peek_char ();
1624 return (gfc_wide_fits_in_byte (c
) ? (unsigned char) c
1625 : (unsigned char) UCHAR_MAX
);
1629 /* Recover from an error. We try to get past the current statement
1630 and get lined up for the next. The next statement follows a '\n'
1631 or a ';'. We also assume that we are not within a character
1632 constant, and deal with finding a '\'' or '"'. */
1635 gfc_error_recovery (void)
1637 gfc_char_t c
, delim
;
1644 c
= gfc_next_char ();
1645 if (c
== '\n' || c
== ';')
1648 if (c
!= '\'' && c
!= '"')
1677 /* Read ahead until the next character to be read is not whitespace. */
1680 gfc_gobble_whitespace (void)
1682 static int linenum
= 0;
1688 old_loc
= gfc_current_locus
;
1689 c
= gfc_next_char_literal (NONSTRING
);
1690 /* Issue a warning for nonconforming tabs. We keep track of the line
1691 number because the Fortran matchers will often back up and the same
1692 line will be scanned multiple times. */
1693 if (warn_tabs
&& c
== '\t')
1695 int cur_linenum
= LOCATION_LINE (gfc_current_locus
.lb
->location
);
1696 if (cur_linenum
!= linenum
)
1698 linenum
= cur_linenum
;
1699 gfc_warning_now (OPT_Wtabs
, "Nonconforming tab character at %C");
1703 while (gfc_is_whitespace (c
));
1705 if (!ISPRINT(c
) && c
!= '\n' && last_error_char
!= gfc_current_locus
.nextc
)
1708 last_error_char
= gfc_current_locus
.nextc
;
1709 snprintf (buf
, 20, "%2.2X", c
);
1710 gfc_error_now ("Invalid character 0x%s at %C", buf
);
1713 gfc_current_locus
= old_loc
;
1717 /* Load a single line into pbuf.
1719 If pbuf points to a NULL pointer, it is allocated.
1720 We truncate lines that are too long, unless we're dealing with
1721 preprocessor lines or if the option -ffixed-line-length-none is set,
1722 in which case we reallocate the buffer to fit the entire line, if
1724 In fixed mode, we expand a tab that occurs within the statement
1725 label region to expand to spaces that leave the next character in
1728 If first_char is not NULL, it's a pointer to a single char value holding
1729 the first character of the line, which has already been read by the
1730 caller. This avoids the use of ungetc().
1732 load_line returns whether the line was truncated.
1734 NOTE: The error machinery isn't available at this point, so we can't
1735 easily report line and column numbers consistent with other
1736 parts of gfortran. */
1739 load_line (FILE *input
, gfc_char_t
**pbuf
, int *pbuflen
, const int *first_char
)
1741 int c
, maxlen
, i
, preprocessor_flag
, buflen
= *pbuflen
;
1742 int trunc_flag
= 0, seen_comment
= 0;
1743 int seen_printable
= 0, seen_ampersand
= 0, quoted
= ' ';
1745 bool found_tab
= false;
1746 bool warned_tabs
= false;
1748 /* Determine the maximum allowed line length. */
1749 if (gfc_current_form
== FORM_FREE
)
1750 maxlen
= flag_free_line_length
;
1751 else if (gfc_current_form
== FORM_FIXED
)
1752 maxlen
= flag_fixed_line_length
;
1758 /* Allocate the line buffer, storing its length into buflen.
1759 Note that if maxlen==0, indicating that arbitrary-length lines
1760 are allowed, the buffer will be reallocated if this length is
1761 insufficient; since 132 characters is the length of a standard
1762 free-form line, we use that as a starting guess. */
1768 *pbuf
= gfc_get_wide_string (buflen
+ 1);
1779 /* In order to not truncate preprocessor lines, we have to
1780 remember that this is one. */
1781 preprocessor_flag
= (c
== '#' ? 1 : 0);
1790 /* Check for illegal use of ampersand. See F95 Standard 3.3.1.3. */
1791 if (gfc_current_form
== FORM_FREE
1792 && !seen_printable
&& seen_ampersand
)
1795 gfc_error_now ("%<&%> not allowed by itself in line %d",
1796 current_file
->line
);
1798 gfc_warning_now (0, "%<&%> not allowed by itself in line %d",
1799 current_file
->line
);
1804 if (c
== '\r' || c
== '\0')
1805 goto next_char
; /* Gobble characters. */
1818 if ((c
!= '&' && c
!= '!' && c
!= ' ') || (c
== '!' && !seen_ampersand
))
1821 /* Is this a fixed-form comment? */
1822 if (gfc_current_form
== FORM_FIXED
&& i
== 0
1823 && (c
== '*' || c
== 'c' || c
== 'd'))
1828 if (c
== '\'' || c
== '"')
1831 else if (c
== quoted
)
1834 /* Is this a free-form comment? */
1835 if (c
== '!' && quoted
== ' ')
1838 /* Vendor extension: "<tab>1" marks a continuation line. */
1842 if (c
>= '1' && c
<= '9')
1849 if (gfc_current_form
== FORM_FIXED
&& c
== '\t' && i
< 6)
1853 if (warn_tabs
&& seen_comment
== 0 && !warned_tabs
)
1856 gfc_warning_now (OPT_Wtabs
,
1857 "Nonconforming tab character in column %d "
1858 "of line %d", i
+ 1, current_file
->line
);
1873 if (maxlen
== 0 || preprocessor_flag
)
1877 /* Reallocate line buffer to double size to hold the
1879 buflen
= buflen
* 2;
1880 *pbuf
= XRESIZEVEC (gfc_char_t
, *pbuf
, (buflen
+ 1));
1881 buffer
= (*pbuf
) + i
;
1884 else if (i
>= maxlen
)
1886 bool trunc_warn
= true;
1888 /* Enhancement, if the very next non-space character is an ampersand
1889 or comment that we would otherwise warn about, don't mark as
1892 /* Truncate the rest of the line. */
1896 if (c
== '\r' || c
== ' ')
1899 if (c
== '\n' || c
== EOF
)
1902 if (!trunc_warn
&& c
!= '!')
1905 if (trunc_warn
&& ((gfc_current_form
== FORM_FIXED
&& c
== '&')
1912 if (trunc_warn
&& !seen_comment
)
1924 /* Pad lines to the selected line length in fixed form. */
1925 if (gfc_current_form
== FORM_FIXED
1926 && flag_fixed_line_length
!= 0
1928 && !preprocessor_flag
1931 while (i
++ < maxlen
)
1942 /* Get a gfc_file structure, initialize it and add it to
1946 get_file (const char *name
, enum lc_reason reason ATTRIBUTE_UNUSED
)
1950 f
= XCNEW (gfc_file
);
1952 f
->filename
= xstrdup (name
);
1954 f
->next
= file_head
;
1957 f
->up
= current_file
;
1958 if (current_file
!= NULL
)
1959 f
->inclusion_line
= current_file
->line
;
1961 linemap_add (line_table
, reason
, false, f
->filename
, 1);
1967 /* Deal with a line from the C preprocessor. The
1968 initial octothorp has already been seen. */
1971 preprocessor_line (gfc_char_t
*c
)
1975 gfc_char_t
*wide_filename
;
1977 int escaped
, unescape
;
1981 while (*c
== ' ' || *c
== '\t')
1984 if (*c
< '0' || *c
> '9')
1987 line
= wide_atoi (c
);
1989 c
= wide_strchr (c
, ' ');
1992 /* No file name given. Set new line number. */
1993 current_file
->line
= line
;
1998 while (*c
== ' ' || *c
== '\t')
2008 /* Make filename end at quote. */
2011 while (*c
&& ! (!escaped
&& *c
== '"'))
2015 else if (*c
== '\\')
2024 /* Preprocessor line has no closing quote. */
2029 /* Undo effects of cpp_quote_string. */
2032 gfc_char_t
*s
= wide_filename
;
2033 gfc_char_t
*d
= gfc_get_wide_string (c
- wide_filename
- unescape
);
2049 flag
[1] = flag
[2] = flag
[3] = flag
[4] = false;
2053 c
= wide_strchr (c
, ' ');
2060 if (i
>= 1 && i
<= 4)
2064 /* Convert the filename in wide characters into a filename in narrow
2066 filename
= gfc_widechar_to_char (wide_filename
, -1);
2068 /* Interpret flags. */
2070 if (flag
[1]) /* Starting new file. */
2072 f
= get_file (filename
, LC_RENAME
);
2073 add_file_change (f
->filename
, f
->inclusion_line
);
2077 if (flag
[2]) /* Ending current file. */
2079 if (!current_file
->up
2080 || filename_cmp (current_file
->up
->filename
, filename
) != 0)
2082 linemap_line_start (line_table
, current_file
->line
, 80);
2083 /* ??? One could compute the exact column where the filename
2084 starts and compute the exact location here. */
2085 gfc_warning_now_at (linemap_position_for_column (line_table
, 1),
2086 0, "file %qs left but not entered",
2088 current_file
->line
++;
2090 free (wide_filename
);
2095 add_file_change (NULL
, line
);
2096 current_file
= current_file
->up
;
2097 linemap_add (line_table
, LC_RENAME
, false, current_file
->filename
,
2098 current_file
->line
);
2101 /* The name of the file can be a temporary file produced by
2102 cpp. Replace the name if it is different. */
2104 if (filename_cmp (current_file
->filename
, filename
) != 0)
2106 /* FIXME: we leak the old filename because a pointer to it may be stored
2107 in the linemap. Alternative could be using GC or updating linemap to
2108 point to the new name, but there is no API for that currently. */
2109 current_file
->filename
= xstrdup (filename
);
2111 /* We need to tell the linemap API that the filename changed. Just
2112 changing current_file is insufficient. */
2113 linemap_add (line_table
, LC_RENAME
, false, current_file
->filename
, line
);
2116 /* Set new line number. */
2117 current_file
->line
= line
;
2119 free (wide_filename
);
2124 linemap_line_start (line_table
, current_file
->line
, 80);
2125 /* ??? One could compute the exact column where the directive
2126 starts and compute the exact location here. */
2127 gfc_warning_now_at (linemap_position_for_column (line_table
, 2), 0,
2128 "Illegal preprocessor directive");
2129 current_file
->line
++;
2133 static bool load_file (const char *, const char *, bool);
2135 /* include_line()-- Checks a line buffer to see if it is an include
2136 line. If so, we call load_file() recursively to load the included
2137 file. We never return a syntax error because a statement like
2138 "include = 5" is perfectly legal. We return 0 if no include was
2139 processed, 1 if we matched an include or -1 if include was
2140 partially processed, but will need continuation lines. */
2143 include_line (gfc_char_t
*line
)
2145 gfc_char_t quote
, *c
, *begin
, *stop
;
2147 const char *include
= "include";
2148 bool allow_continuation
= flag_dec_include
;
2153 if (flag_openmp
|| flag_openmp_simd
)
2155 if (gfc_current_form
== FORM_FREE
)
2157 while (*c
== ' ' || *c
== '\t')
2159 if (*c
== '!' && c
[1] == '$' && (c
[2] == ' ' || c
[2] == '\t'))
2164 if ((*c
== '!' || *c
== 'c' || *c
== 'C' || *c
== '*')
2165 && c
[1] == '$' && c
[2] == ' ')
2170 if (gfc_current_form
== FORM_FREE
)
2172 while (*c
== ' ' || *c
== '\t')
2174 if (gfc_wide_strncasecmp (c
, "include", 7))
2176 if (!allow_continuation
)
2178 for (i
= 0; i
< 7; ++i
)
2180 gfc_char_t c1
= gfc_wide_tolower (*c
);
2181 if (c1
!= (unsigned char) include
[i
])
2185 if (i
== 0 || *c
!= '&')
2188 while (*c
== ' ' || *c
== '\t')
2190 if (*c
== '\0' || *c
== '!')
2199 while (*c
== ' ' || *c
== '\t')
2201 if (flag_dec_include
&& *c
== '0' && c
- line
== 5)
2204 while (*c
== ' ' || *c
== '\t')
2208 allow_continuation
= false;
2209 for (i
= 0; i
< 7; ++i
)
2211 gfc_char_t c1
= gfc_wide_tolower (*c
);
2212 if (c1
!= (unsigned char) include
[i
])
2215 while (*c
== ' ' || *c
== '\t')
2218 if (!allow_continuation
)
2228 /* At the end of line or comment this might be continued. */
2229 if (*c
== '\0' || *c
== '!')
2236 while (*c
== ' ' || *c
== '\t')
2239 /* Find filename between quotes. */
2242 if (quote
!= '"' && quote
!= '\'')
2244 if (allow_continuation
)
2246 if (gfc_current_form
== FORM_FREE
)
2250 while (*c
== ' ' || *c
== '\t')
2252 if (*c
== '\0' || *c
== '!')
2256 else if (quote
== '\0' || quote
== '!')
2265 while (*c
!= quote
&& *c
!= '\0')
2267 if (allow_continuation
&& gfc_current_form
== FORM_FREE
)
2271 else if (*c
!= ' ' && *c
!= '\t')
2279 if (allow_continuation
2280 && (cont
|| gfc_current_form
!= FORM_FREE
))
2287 while (*c
== ' ' || *c
== '\t')
2290 if (*c
!= '\0' && *c
!= '!')
2293 /* We have an include line at this point. */
2295 *stop
= '\0'; /* It's ok to trash the buffer, as this line won't be
2296 read by anything else. */
2298 filename
= gfc_widechar_to_char (begin
, -1);
2299 if (!load_file (filename
, NULL
, false))
2300 exit (FATAL_EXIT_CODE
);
2306 /* Similarly, but try to parse an INCLUDE statement, using gfc_next_char etc.
2307 APIs. Return 1 if recognized as valid INCLUDE statement and load_file has
2308 been called, 0 if it is not a valid INCLUDE statement and -1 if eof has
2309 been encountered while parsing it. */
2311 include_stmt (gfc_linebuf
*b
)
2313 int ret
= 0, i
, length
;
2314 const char *include
= "include";
2315 gfc_char_t c
, quote
= 0;
2321 gcc_attribute_flag
= 0;
2326 gfc_current_locus
.lb
= b
;
2327 gfc_current_locus
.nextc
= b
->line
;
2329 gfc_skip_comments ();
2330 gfc_gobble_whitespace ();
2332 for (i
= 0; i
< 7; i
++)
2334 c
= gfc_next_char ();
2335 if (c
!= (unsigned char) include
[i
])
2337 if (gfc_current_form
== FORM_FIXED
2340 && gfc_current_locus
.nextc
== b
->line
+ 6)
2342 gfc_gobble_whitespace ();
2346 gcc_assert (i
!= 0);
2349 gfc_advance_line ();
2350 gfc_skip_comments ();
2357 gfc_gobble_whitespace ();
2359 c
= gfc_next_char ();
2360 if (c
== '\'' || c
== '"')
2366 gfc_advance_line ();
2367 gfc_skip_comments ();
2374 str_locus
= gfc_current_locus
;
2378 c
= gfc_next_char_literal (INSTRING_NOWARN
);
2383 gfc_advance_line ();
2384 gfc_skip_comments ();
2393 gfc_gobble_whitespace ();
2394 c
= gfc_next_char ();
2398 gfc_current_locus
= str_locus
;
2400 filename
= XNEWVEC (char, length
+ 1);
2401 for (i
= 0; i
< length
; i
++)
2403 c
= gfc_next_char_literal (INSTRING_WARN
);
2404 gcc_assert (gfc_wide_fits_in_byte (c
));
2405 filename
[i
] = (unsigned char) c
;
2407 filename
[length
] = '\0';
2408 if (!load_file (filename
, NULL
, false))
2409 exit (FATAL_EXIT_CODE
);
2416 gcc_attribute_flag
= 0;
2421 memset (&gfc_current_locus
, '\0', sizeof (locus
));
2422 memset (&openmp_locus
, '\0', sizeof (locus
));
2423 memset (&openacc_locus
, '\0', sizeof (locus
));
2424 memset (&gcc_attribute_locus
, '\0', sizeof (locus
));
2428 /* Load a file into memory by calling load_line until the file ends. */
2431 load_file (const char *realfilename
, const char *displayedname
, bool initial
)
2434 gfc_linebuf
*b
, *include_b
= NULL
;
2441 const char *filename
;
2442 /* If realfilename and displayedname are different and non-null then
2443 surely realfilename is the preprocessed form of
2445 bool preprocessed_p
= (realfilename
&& displayedname
2446 && strcmp (realfilename
, displayedname
));
2448 filename
= displayedname
? displayedname
: realfilename
;
2450 for (f
= current_file
; f
; f
= f
->up
)
2451 if (filename_cmp (filename
, f
->filename
) == 0)
2453 fprintf (stderr
, "%s:%d: Error: File '%s' is being included "
2454 "recursively\n", current_file
->filename
, current_file
->line
,
2463 input
= gfc_src_file
;
2464 gfc_src_file
= NULL
;
2467 input
= gfc_open_file (realfilename
);
2471 gfc_error_now ("Cannot open file %qs", filename
);
2477 input
= gfc_open_included_file (realfilename
, false, false);
2480 /* For -fpre-include file, current_file is NULL. */
2482 fprintf (stderr
, "%s:%d: Error: Can't open included file '%s'\n",
2483 current_file
->filename
, current_file
->line
, filename
);
2485 fprintf (stderr
, "Error: Can't open pre-included file '%s'\n",
2490 stat_result
= stat (realfilename
, &st
);
2491 if (stat_result
== 0 && !S_ISREG(st
.st_mode
))
2493 fprintf (stderr
, "%s:%d: Error: Included path '%s'"
2494 " is not a regular file\n",
2495 current_file
->filename
, current_file
->line
, filename
);
2503 A "non-initial" file means a file that is being included. In
2504 that case we are creating an LC_ENTER map.
2506 An "initial" file means a main file; one that is not included.
2507 That file has already got at least one (surely more) line map(s)
2508 created by gfc_init. So the subsequent map created in that case
2509 must have LC_RENAME reason.
2511 This latter case is not true for a preprocessed file. In that
2512 case, although the file is "initial", the line maps created by
2513 gfc_init was used during the preprocessing of the file. Now that
2514 the preprocessing is over and we are being fed the result of that
2515 preprocessing, we need to create a brand new line map for the
2516 preprocessed file, so the reason is going to be LC_ENTER. */
2518 f
= get_file (filename
, (initial
&& !preprocessed_p
) ? LC_RENAME
: LC_ENTER
);
2520 add_file_change (f
->filename
, f
->inclusion_line
);
2522 current_file
->line
= 1;
2527 if (initial
&& gfc_src_preprocessor_lines
[0])
2529 preprocessor_line (gfc_src_preprocessor_lines
[0]);
2530 free (gfc_src_preprocessor_lines
[0]);
2531 gfc_src_preprocessor_lines
[0] = NULL
;
2532 if (gfc_src_preprocessor_lines
[1])
2534 preprocessor_line (gfc_src_preprocessor_lines
[1]);
2535 free (gfc_src_preprocessor_lines
[1]);
2536 gfc_src_preprocessor_lines
[1] = NULL
;
2542 int trunc
= load_line (input
, &line
, &line_len
, NULL
);
2545 len
= gfc_wide_strlen (line
);
2546 if (feof (input
) && len
== 0)
2549 /* If this is the first line of the file, it can contain a byte
2550 order mark (BOM), which we will ignore:
2551 FF FE is UTF-16 little endian,
2552 FE FF is UTF-16 big endian,
2553 EF BB BF is UTF-8. */
2555 && ((line_len
>= 2 && line
[0] == (unsigned char) '\xFF'
2556 && line
[1] == (unsigned char) '\xFE')
2557 || (line_len
>= 2 && line
[0] == (unsigned char) '\xFE'
2558 && line
[1] == (unsigned char) '\xFF')
2559 || (line_len
>= 3 && line
[0] == (unsigned char) '\xEF'
2560 && line
[1] == (unsigned char) '\xBB'
2561 && line
[2] == (unsigned char) '\xBF')))
2563 int n
= line
[1] == (unsigned char) '\xBB' ? 3 : 2;
2564 gfc_char_t
*new_char
= gfc_get_wide_string (line_len
);
2566 wide_strcpy (new_char
, &line
[n
]);
2572 /* There are three things this line can be: a line of Fortran
2573 source, an include line or a C preprocessor directive. */
2577 /* When -g3 is specified, it's possible that we emit #define
2578 and #undef lines, which we need to pass to the middle-end
2579 so that it can emit correct debug info. */
2580 if (debug_info_level
== DINFO_LEVEL_VERBOSE
2581 && (wide_strncmp (line
, "#define ", 8) == 0
2582 || wide_strncmp (line
, "#undef ", 7) == 0))
2586 preprocessor_line (line
);
2591 /* Preprocessed files have preprocessor lines added before the byte
2592 order mark, so first_line is not about the first line of the file
2593 but the first line that's not a preprocessor line. */
2596 inc_line
= include_line (line
);
2599 current_file
->line
++;
2605 b
= XCNEWVAR (gfc_linebuf
, gfc_linebuf_header_size
2606 + (len
+ 1) * sizeof (gfc_char_t
));
2610 = linemap_line_start (line_table
, current_file
->line
++, len
);
2611 /* ??? We add the location for the maximum column possible here,
2612 because otherwise if the next call creates a new line-map, it
2613 will not reserve space for any offset. */
2615 linemap_position_for_column (line_table
, len
);
2617 b
->file
= current_file
;
2618 b
->truncated
= trunc
;
2619 wide_strcpy (b
->line
, line
);
2621 if (line_head
== NULL
)
2624 line_tail
->next
= b
;
2628 while (file_changes_cur
< file_changes_count
)
2629 file_changes
[file_changes_cur
++].lb
= b
;
2631 if (flag_dec_include
)
2633 if (include_b
&& b
!= include_b
)
2635 int inc_line2
= include_stmt (include_b
);
2638 else if (inc_line2
> 0)
2642 if (gfc_current_form
== FORM_FIXED
)
2644 for (gfc_char_t
*p
= include_b
->line
; *p
; p
++)
2648 include_b
->line
[0] = '\0';
2651 include_b
= include_b
->next
;
2657 if (inc_line
== -1 && !include_b
)
2662 /* Release the line buffer allocated in load_line. */
2668 add_file_change (NULL
, current_file
->inclusion_line
+ 1);
2669 current_file
= current_file
->up
;
2670 linemap_add (line_table
, LC_LEAVE
, 0, NULL
, 0);
2675 /* Open a new file and start scanning from that file. Returns true
2676 if everything went OK, false otherwise. If form == FORM_UNKNOWN
2677 it tries to determine the source form from the filename, defaulting
2685 if (flag_pre_include
!= NULL
2686 && !load_file (flag_pre_include
, NULL
, false))
2687 exit (FATAL_EXIT_CODE
);
2689 if (gfc_cpp_enabled ())
2691 result
= gfc_cpp_preprocess (gfc_source_file
);
2692 if (!gfc_cpp_preprocess_only ())
2693 result
= load_file (gfc_cpp_temporary_file (), gfc_source_file
, true);
2696 result
= load_file (gfc_source_file
, NULL
, true);
2698 gfc_current_locus
.lb
= line_head
;
2699 gfc_current_locus
.nextc
= (line_head
== NULL
) ? NULL
: line_head
->line
;
2701 #if 0 /* Debugging aid. */
2702 for (; line_head
; line_head
= line_head
->next
)
2703 printf ("%s:%3d %s\n", LOCATION_FILE (line_head
->location
),
2704 LOCATION_LINE (line_head
->location
), line_head
->line
);
2706 exit (SUCCESS_EXIT_CODE
);
2713 unescape_filename (const char *ptr
)
2715 const char *p
= ptr
, *s
;
2717 int escaped
, unescape
= 0;
2719 /* Make filename end at quote. */
2721 while (*p
&& ! (! escaped
&& *p
== '"'))
2725 else if (*p
== '\\')
2736 /* Undo effects of cpp_quote_string. */
2738 d
= XCNEWVEC (char, p
+ 1 - ptr
- unescape
);
2753 /* For preprocessed files, if the first tokens are of the form # NUM.
2754 handle the directives so we know the original file name. */
2757 gfc_read_orig_filename (const char *filename
, const char **canon_source_file
)
2760 char *dirname
, *tmp
;
2762 gfc_src_file
= gfc_open_file (filename
);
2763 if (gfc_src_file
== NULL
)
2766 c
= getc (gfc_src_file
);
2772 load_line (gfc_src_file
, &gfc_src_preprocessor_lines
[0], &len
, &c
);
2774 if (wide_strncmp (gfc_src_preprocessor_lines
[0], "# 1 \"", 5) != 0)
2777 tmp
= gfc_widechar_to_char (&gfc_src_preprocessor_lines
[0][5], -1);
2778 filename
= unescape_filename (tmp
);
2780 if (filename
== NULL
)
2783 c
= getc (gfc_src_file
);
2789 load_line (gfc_src_file
, &gfc_src_preprocessor_lines
[1], &len
, &c
);
2791 if (wide_strncmp (gfc_src_preprocessor_lines
[1], "# 1 \"", 5) != 0)
2794 tmp
= gfc_widechar_to_char (&gfc_src_preprocessor_lines
[1][5], -1);
2795 dirname
= unescape_filename (tmp
);
2797 if (dirname
== NULL
)
2800 len
= strlen (dirname
);
2801 if (len
< 3 || dirname
[len
- 1] != '/' || dirname
[len
- 2] != '/')
2806 dirname
[len
- 2] = '\0';
2807 set_src_pwd (dirname
);
2809 if (! IS_ABSOLUTE_PATH (filename
))
2811 char *p
= XCNEWVEC (char, len
+ strlen (filename
));
2813 memcpy (p
, dirname
, len
- 2);
2815 strcpy (p
+ len
- 1, filename
);
2816 *canon_source_file
= p
;