/* Character scanner.
- Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005
- Free Software Foundation, Inc.
+ Copyright (C) 2000, 2001, 2002, 2003, 2004, 2005, 2006, 2007, 2008, 2009,
+ 2010 Free Software Foundation, Inc.
Contributed by Andy Vaught
This file is part of GCC.
GCC 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
+Software Foundation; either version 3, or (at your option) any later
version.
GCC is distributed in the hope that it will be useful, but WITHOUT ANY
for more details.
You should have received a copy of the GNU General Public License
-along with GCC; see the file COPYING. If not, write to the Free
-Software Foundation, 51 Franklin Street, Fifth Floor, Boston, MA
-02110-1301, USA. */
+along with GCC; see the file COPYING3. If not see
+<http://www.gnu.org/licenses/>. */
/* Set of subroutines to (ultimately) return the next character to the
various matching subroutines. This file's job is to read files and
#include "config.h"
#include "system.h"
#include "gfortran.h"
+#include "toplev.h" /* For set_src_pwd. */
+#include "debug.h"
+#include "flags.h"
+#include "cpp.h"
/* Structure for holding module and include file search path. */
typedef struct gfc_directorylist
{
char *path;
+ bool use_for_modules;
struct gfc_directorylist *next;
}
gfc_directorylist;
/* List of include file search directories. */
-static gfc_directorylist *include_dirs;
+static gfc_directorylist *include_dirs, *intrinsic_modules_dirs;
static gfc_file *file_head, *current_file;
-static int continue_flag, end_flag;
+static int continue_flag, end_flag, openmp_flag, gcc_attribute_flag;
+static int continue_count, continue_line;
+static locus openmp_locus;
+static locus gcc_attribute_locus;
gfc_source_form gfc_current_form;
static gfc_linebuf *line_head, *line_tail;
locus gfc_current_locus;
const char *gfc_source_file;
-
+static FILE *gfc_src_file;
+static gfc_char_t *gfc_src_preprocessor_lines[2];
+
+static struct gfc_file_change
+{
+ const char *filename;
+ gfc_linebuf *lb;
+ int line;
+} *file_changes;
+size_t file_changes_cur, file_changes_count;
+size_t file_changes_allocated;
+
+
+/* Functions dealing with our wide characters (gfc_char_t) and
+ sequences of such characters. */
+
+int
+gfc_wide_fits_in_byte (gfc_char_t c)
+{
+ return (c <= UCHAR_MAX);
+}
+
+static inline int
+wide_is_ascii (gfc_char_t c)
+{
+ return (gfc_wide_fits_in_byte (c) && ((unsigned char) c & ~0x7f) == 0);
+}
+
+int
+gfc_wide_is_printable (gfc_char_t c)
+{
+ return (gfc_wide_fits_in_byte (c) && ISPRINT ((unsigned char) c));
+}
+
+gfc_char_t
+gfc_wide_tolower (gfc_char_t c)
+{
+ return (wide_is_ascii (c) ? (gfc_char_t) TOLOWER((unsigned char) c) : c);
+}
+
+gfc_char_t
+gfc_wide_toupper (gfc_char_t c)
+{
+ return (wide_is_ascii (c) ? (gfc_char_t) TOUPPER((unsigned char) c) : c);
+}
+
+int
+gfc_wide_is_digit (gfc_char_t c)
+{
+ return (c >= '0' && c <= '9');
+}
+
+static inline int
+wide_atoi (gfc_char_t *c)
+{
+#define MAX_DIGITS 20
+ char buf[MAX_DIGITS+1];
+ int i = 0;
+
+ while (gfc_wide_is_digit(*c) && i < MAX_DIGITS)
+ buf[i++] = *c++;
+ buf[i] = '\0';
+ return atoi (buf);
+}
+
+size_t
+gfc_wide_strlen (const gfc_char_t *str)
+{
+ size_t i;
+
+ for (i = 0; str[i]; i++)
+ ;
+
+ return i;
+}
+
+gfc_char_t *
+gfc_wide_memset (gfc_char_t *b, gfc_char_t c, size_t len)
+{
+ size_t i;
+
+ for (i = 0; i < len; i++)
+ b[i] = c;
+
+ return b;
+}
+
+static gfc_char_t *
+wide_strcpy (gfc_char_t *dest, const gfc_char_t *src)
+{
+ gfc_char_t *d;
+
+ for (d = dest; (*d = *src) != '\0'; ++src, ++d)
+ ;
+
+ return dest;
+}
+
+static gfc_char_t *
+wide_strchr (const gfc_char_t *s, gfc_char_t c)
+{
+ do {
+ if (*s == c)
+ {
+ return CONST_CAST(gfc_char_t *, s);
+ }
+ } while (*s++);
+ return 0;
+}
+
+char *
+gfc_widechar_to_char (const gfc_char_t *s, int length)
+{
+ size_t len, i;
+ char *res;
+
+ if (s == NULL)
+ return NULL;
+
+ /* Passing a negative length is used to indicate that length should be
+ calculated using gfc_wide_strlen(). */
+ len = (length >= 0 ? (size_t) length : gfc_wide_strlen (s));
+ res = XNEWVEC (char, len + 1);
+
+ for (i = 0; i < len; i++)
+ {
+ gcc_assert (gfc_wide_fits_in_byte (s[i]));
+ res[i] = (unsigned char) s[i];
+ }
+
+ res[len] = '\0';
+ return res;
+}
+
+gfc_char_t *
+gfc_char_to_widechar (const char *s)
+{
+ size_t len, i;
+ gfc_char_t *res;
+
+ if (s == NULL)
+ return NULL;
+
+ len = strlen (s);
+ res = gfc_get_wide_string (len + 1);
+
+ for (i = 0; i < len; i++)
+ res[i] = (unsigned char) s[i];
+
+ res[len] = '\0';
+ return res;
+}
+
+static int
+wide_strncmp (const gfc_char_t *s1, const char *s2, size_t n)
+{
+ gfc_char_t c1, c2;
+
+ while (n-- > 0)
+ {
+ c1 = *s1++;
+ c2 = *s2++;
+ if (c1 != c2)
+ return (c1 > c2 ? 1 : -1);
+ if (c1 == '\0')
+ return 0;
+ }
+ return 0;
+}
+
+int
+gfc_wide_strncasecmp (const gfc_char_t *s1, const char *s2, size_t n)
+{
+ gfc_char_t c1, c2;
+
+ while (n-- > 0)
+ {
+ c1 = gfc_wide_tolower (*s1++);
+ c2 = TOLOWER (*s2++);
+ if (c1 != c2)
+ return (c1 > c2 ? 1 : -1);
+ if (c1 == '\0')
+ return 0;
+ }
+ return 0;
+}
+
/* Main scanner initialization. */
line_head = NULL;
line_tail = NULL;
+ continue_count = 0;
+ continue_line = 0;
+
end_flag = 0;
}
gfc_free(file_head);
file_head = f;
}
-
}
/* Adds path to the list pointed to by list. */
-void
-gfc_add_include_path (const char *path)
+static void
+add_path_to_list (gfc_directorylist **list, const char *path,
+ bool use_for_modules, bool head)
{
gfc_directorylist *dir;
const char *p;
p = path;
- while (*p == ' ' || *p == '\t') /* someone might do 'gfortran "-I include"' */
+ while (*p == ' ' || *p == '\t') /* someone might do "-I include" */
if (*p++ == '\0')
return;
- dir = include_dirs;
- if (!dir)
+ if (head || *list == NULL)
{
- dir = include_dirs = gfc_getmem (sizeof (gfc_directorylist));
+ dir = XCNEW (gfc_directorylist);
+ if (!head)
+ *list = dir;
}
else
{
+ dir = *list;
while (dir->next)
dir = dir->next;
- dir->next = gfc_getmem (sizeof (gfc_directorylist));
+ dir->next = XCNEW (gfc_directorylist);
dir = dir->next;
}
- dir->next = NULL;
- dir->path = gfc_getmem (strlen (p) + 2);
+ dir->next = head ? *list : NULL;
+ if (head)
+ *list = dir;
+ dir->use_for_modules = use_for_modules;
+ dir->path = XCNEWVEC (char, strlen (p) + 2);
strcpy (dir->path, p);
strcat (dir->path, "/"); /* make '/' last character */
}
+void
+gfc_add_include_path (const char *path, bool use_for_modules, bool file_dir)
+{
+ add_path_to_list (&include_dirs, path, use_for_modules, file_dir);
+
+ /* For '#include "..."' these directories are automatically searched. */
+ if (!file_dir)
+ gfc_cpp_add_include_path (xstrdup(path), true);
+}
+
+
+void
+gfc_add_intrinsic_modules_path (const char *path)
+{
+ add_path_to_list (&intrinsic_modules_dirs, path, true, false);
+}
+
+
/* Release resources allocated for options. */
void
{
gfc_directorylist *p;
- gfc_free (gfc_option.module_dir);
while (include_dirs != NULL)
{
p = include_dirs;
gfc_free (p->path);
gfc_free (p);
}
+
+ while (intrinsic_modules_dirs != NULL)
+ {
+ p = intrinsic_modules_dirs;
+ intrinsic_modules_dirs = intrinsic_modules_dirs->next;
+ gfc_free (p->path);
+ gfc_free (p);
+ }
+
+ gfc_free (gfc_option.module_dir);
}
-/* Opens file for reading, searching through the include directories
- given if necessary. If the include_cwd argument is true, we try
- to open the file in the current directory first. */
-FILE *
-gfc_open_included_file (const char *name, const bool include_cwd)
+static FILE *
+open_included_file (const char *name, gfc_directorylist *list,
+ bool module, bool system)
{
char *fullname;
gfc_directorylist *p;
FILE *f;
- if (include_cwd)
+ for (p = list; p; p = p->next)
{
- f = gfc_open_file (name);
- if (f != NULL)
- return f;
- }
+ if (module && !p->use_for_modules)
+ continue;
- for (p = include_dirs; p; p = p->next)
- {
fullname = (char *) alloca(strlen (p->path) + strlen (name) + 1);
strcpy (fullname, p->path);
strcat (fullname, name);
f = gfc_open_file (fullname);
if (f != NULL)
- return f;
+ {
+ if (gfc_cpp_makedep ())
+ gfc_cpp_add_dep (fullname, system);
+
+ return f;
+ }
}
return NULL;
}
+
+/* Opens file for reading, searching through the include directories
+ given if necessary. If the include_cwd argument is true, we try
+ to open the file in the current directory first. */
+
+FILE *
+gfc_open_included_file (const char *name, bool include_cwd, bool module)
+{
+ FILE *f = NULL;
+
+ if (IS_ABSOLUTE_PATH (name) || include_cwd)
+ {
+ f = gfc_open_file (name);
+ if (f && gfc_cpp_makedep ())
+ gfc_cpp_add_dep (name, false);
+ }
+
+ if (!f)
+ f = open_included_file (name, include_dirs, module, false);
+
+ return f;
+}
+
+FILE *
+gfc_open_intrinsic_module (const char *name)
+{
+ FILE *f = NULL;
+
+ if (IS_ABSOLUTE_PATH (name))
+ {
+ f = gfc_open_file (name);
+ if (f && gfc_cpp_makedep ())
+ gfc_cpp_add_dep (name, true);
+ }
+
+ if (!f)
+ f = open_included_file (name, intrinsic_modules_dirs, true, true);
+
+ return f;
+}
+
+
/* Test to see if we're at the end of the main source file. */
int
gfc_at_end (void)
{
-
return end_flag;
}
int
gfc_at_eof (void)
{
-
if (gfc_at_end ())
return 1;
int
gfc_at_eol (void)
{
-
if (gfc_at_eof ())
return 1;
return (*gfc_current_locus.nextc == '\0');
}
+static void
+add_file_change (const char *filename, int line)
+{
+ if (file_changes_count == file_changes_allocated)
+ {
+ if (file_changes_allocated)
+ file_changes_allocated *= 2;
+ else
+ file_changes_allocated = 16;
+ file_changes = XRESIZEVEC (struct gfc_file_change, file_changes,
+ file_changes_allocated);
+ }
+ file_changes[file_changes_count].filename = filename;
+ file_changes[file_changes_count].lb = NULL;
+ file_changes[file_changes_count++].line = line;
+}
+
+static void
+report_file_change (gfc_linebuf *lb)
+{
+ size_t c = file_changes_cur;
+ while (c < file_changes_count
+ && file_changes[c].lb == lb)
+ {
+ if (file_changes[c].filename)
+ (*debug_hooks->start_source_file) (file_changes[c].line,
+ file_changes[c].filename);
+ else
+ (*debug_hooks->end_source_file) (file_changes[c].line);
+ ++c;
+ }
+ file_changes_cur = c;
+}
+
+void
+gfc_start_source_files (void)
+{
+ /* If the debugger wants the name of the main source file,
+ we give it. */
+ if (debug_hooks->start_end_main_source_file)
+ (*debug_hooks->start_source_file) (0, gfc_source_file);
+
+ file_changes_cur = 0;
+ report_file_change (gfc_current_locus.lb);
+}
+
+void
+gfc_end_source_files (void)
+{
+ report_file_change (NULL);
+
+ if (debug_hooks->start_end_main_source_file)
+ (*debug_hooks->end_source_file) (0);
+}
/* Advance the current line pointer to the next line. */
return;
}
+ if (gfc_current_locus.lb->next
+ && !gfc_current_locus.lb->next->dbg_emitted)
+ {
+ report_file_change (gfc_current_locus.lb->next);
+ gfc_current_locus.lb->next->dbg_emitted = true;
+ }
+
gfc_current_locus.lb = gfc_current_locus.lb->next;
- if (gfc_current_locus.lb != NULL)
+ if (gfc_current_locus.lb != NULL)
gfc_current_locus.nextc = gfc_current_locus.lb->line;
else
{
pointer from being on the wrong line if the current statement ends
prematurely. */
-static int
+static gfc_char_t
next_char (void)
{
- int c;
+ gfc_char_t c;
if (gfc_current_locus.nextc == NULL)
return '\n';
return c;
}
+
/* Skip a comment. When we come here the parse pointer is positioned
immediately after the comment character. If we ever implement
- compiler directives withing comments, here is where we parse the
+ compiler directives within comments, here is where we parse the
directive. */
static void
skip_comment_line (void)
{
- char c;
+ gfc_char_t c;
do
{
}
+int
+gfc_define_undef_line (void)
+{
+ char *tmp;
+
+ /* All lines beginning with '#' are either #define or #undef. */
+ if (debug_info_level != DINFO_LEVEL_VERBOSE || gfc_peek_ascii_char () != '#')
+ return 0;
+
+ if (wide_strncmp (gfc_current_locus.nextc, "#define ", 8) == 0)
+ {
+ tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[8], -1);
+ (*debug_hooks->define) (gfc_linebuf_linenum (gfc_current_locus.lb),
+ tmp);
+ gfc_free (tmp);
+ }
+
+ if (wide_strncmp (gfc_current_locus.nextc, "#undef ", 7) == 0)
+ {
+ tmp = gfc_widechar_to_char (&gfc_current_locus.nextc[7], -1);
+ (*debug_hooks->undef) (gfc_linebuf_linenum (gfc_current_locus.lb),
+ tmp);
+ gfc_free (tmp);
+ }
+
+ /* Skip the rest of the line. */
+ skip_comment_line ();
+
+ return 1;
+}
+
+
+/* Return true if GCC$ was matched. */
+static bool
+skip_gcc_attribute (locus start)
+{
+ bool r = false;
+ char c;
+ locus old_loc = gfc_current_locus;
+
+ if ((c = next_char ()) == 'g' || c == 'G')
+ if ((c = next_char ()) == 'c' || c == 'C')
+ if ((c = next_char ()) == 'c' || c == 'C')
+ if ((c = next_char ()) == '$')
+ r = true;
+
+ if (r == false)
+ gfc_current_locus = old_loc;
+ else
+ {
+ gcc_attribute_flag = 1;
+ gcc_attribute_locus = old_loc;
+ gfc_current_locus = start;
+ }
+
+ return r;
+}
+
+
+
/* Comment lines are null lines, lines containing only blanks or lines
- on which the first nonblank line is a '!'. */
+ on which the first nonblank line is a '!'.
+ Return true if !$ openmp conditional compilation sentinel was
+ seen. */
-static void
+static bool
skip_free_comments (void)
{
locus start;
- char c;
+ gfc_char_t c;
+ int at_bol;
for (;;)
{
+ at_bol = gfc_at_bol ();
start = gfc_current_locus;
if (gfc_at_eof ())
break;
do
- {
- c = next_char ();
- }
+ c = next_char ();
while (gfc_is_whitespace (c));
if (c == '\n')
if (c == '!')
{
+ /* Keep the !GCC$ line. */
+ if (at_bol && skip_gcc_attribute (start))
+ return false;
+
+ /* If -fopenmp, we need to handle here 2 things:
+ 1) don't treat !$omp as comments, but directives
+ 2) handle OpenMP conditional compilation, where
+ !$ should be treated as 2 spaces (for initial lines
+ only if followed by space). */
+ if (gfc_option.gfc_flag_openmp && at_bol)
+ {
+ locus old_loc = gfc_current_locus;
+ if (next_char () == '$')
+ {
+ c = next_char ();
+ if (c == 'o' || c == 'O')
+ {
+ if (((c = next_char ()) == 'm' || c == 'M')
+ && ((c = next_char ()) == 'p' || c == 'P'))
+ {
+ if ((c = next_char ()) == ' ' || c == '\t'
+ || continue_flag)
+ {
+ while (gfc_is_whitespace (c))
+ c = next_char ();
+ if (c != '\n' && c != '!')
+ {
+ openmp_flag = 1;
+ openmp_locus = old_loc;
+ gfc_current_locus = start;
+ return false;
+ }
+ }
+ else
+ gfc_warning_now ("!$OMP at %C starts a commented "
+ "line as it neither is followed "
+ "by a space nor is a "
+ "continuation line");
+ }
+ gfc_current_locus = old_loc;
+ next_char ();
+ c = next_char ();
+ }
+ if (continue_flag || c == ' ' || c == '\t')
+ {
+ gfc_current_locus = old_loc;
+ next_char ();
+ openmp_flag = 0;
+ return true;
+ }
+ }
+ gfc_current_locus = old_loc;
+ }
skip_comment_line ();
continue;
}
break;
}
+ if (openmp_flag && at_bol)
+ openmp_flag = 0;
+
+ gcc_attribute_flag = 0;
gfc_current_locus = start;
+ return false;
}
{
locus start;
int col;
- char c;
+ gfc_char_t c;
+
+ if (! gfc_at_bol ())
+ {
+ start = gfc_current_locus;
+ if (! gfc_at_eof ())
+ {
+ do
+ c = next_char ();
+ while (gfc_is_whitespace (c));
+
+ if (c == '\n')
+ gfc_advance_line ();
+ else if (c == '!')
+ skip_comment_line ();
+ }
+
+ if (! gfc_at_bol ())
+ {
+ gfc_current_locus = start;
+ return;
+ }
+ }
for (;;)
{
if (c == '!' || c == 'c' || c == 'C' || c == '*')
{
+ if (skip_gcc_attribute (start))
+ {
+ /* Canonicalize to *$omp. */
+ *start.nextc = '*';
+ return;
+ }
+
+ /* If -fopenmp, we need to handle here 2 things:
+ 1) don't treat !$omp|c$omp|*$omp as comments, but directives
+ 2) handle OpenMP conditional compilation, where
+ !$|c$|*$ should be treated as 2 spaces if the characters
+ in columns 3 to 6 are valid fixed form label columns
+ characters. */
+ if (gfc_current_locus.lb != NULL
+ && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb))
+ continue_line = gfc_linebuf_linenum (gfc_current_locus.lb);
+
+ if (gfc_option.gfc_flag_openmp)
+ {
+ if (next_char () == '$')
+ {
+ c = next_char ();
+ if (c == 'o' || c == 'O')
+ {
+ if (((c = next_char ()) == 'm' || c == 'M')
+ && ((c = next_char ()) == 'p' || c == 'P'))
+ {
+ c = next_char ();
+ if (c != '\n'
+ && ((openmp_flag && continue_flag)
+ || c == ' ' || c == '\t' || c == '0'))
+ {
+ do
+ c = next_char ();
+ while (gfc_is_whitespace (c));
+ if (c != '\n' && c != '!')
+ {
+ /* Canonicalize to *$omp. */
+ *start.nextc = '*';
+ openmp_flag = 1;
+ gfc_current_locus = start;
+ return;
+ }
+ }
+ }
+ }
+ else
+ {
+ int digit_seen = 0;
+
+ for (col = 3; col < 6; col++, c = next_char ())
+ if (c == ' ')
+ continue;
+ else if (c == '\t')
+ {
+ col = 6;
+ break;
+ }
+ else if (c < '0' || c > '9')
+ break;
+ else
+ digit_seen = 1;
+
+ if (col == 6 && c != '\n'
+ && ((continue_flag && !digit_seen)
+ || c == ' ' || c == '\t' || c == '0'))
+ {
+ gfc_current_locus = start;
+ start.nextc[0] = ' ';
+ start.nextc[1] = ' ';
+ continue;
+ }
+ }
+ }
+ gfc_current_locus = start;
+ }
skip_comment_line ();
continue;
}
if (col != 6 && c == '!')
{
+ if (gfc_current_locus.lb != NULL
+ && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb))
+ continue_line = gfc_linebuf_linenum (gfc_current_locus.lb);
skip_comment_line ();
continue;
}
break;
}
+ openmp_flag = 0;
+ gcc_attribute_flag = 0;
gfc_current_locus = start;
}
-/* Skips the current line if it is a comment. Assumes that we are at
- the start of the current line. */
+/* Skips the current line if it is a comment. */
void
gfc_skip_comments (void)
{
-
- if (!gfc_at_bol () || gfc_current_form == FORM_FREE)
+ if (gfc_current_form == FORM_FREE)
skip_free_comments ();
else
skip_fixed_comments ();
line. The in_string flag denotes whether we're inside a character
context or not. */
-int
-gfc_next_char_literal (int in_string)
+gfc_char_t
+gfc_next_char_literal (gfc_instring in_string)
{
locus old_loc;
- int i, c;
+ int i, prev_openmp_flag;
+ gfc_char_t c;
continue_flag = 0;
restart:
c = next_char ();
if (gfc_at_end ())
- return c;
+ {
+ continue_count = 0;
+ return c;
+ }
if (gfc_current_form == FORM_FREE)
{
+ bool openmp_cond_flag;
if (!in_string && c == '!')
{
+ if (gcc_attribute_flag
+ && memcmp (&gfc_current_locus, &gcc_attribute_locus,
+ sizeof (gfc_current_locus)) == 0)
+ goto done;
+
+ if (openmp_flag
+ && memcmp (&gfc_current_locus, &openmp_locus,
+ sizeof (gfc_current_locus)) == 0)
+ goto done;
+
/* This line can't be continued */
do
{
goto done;
}
+ /* Check to see if the continuation line was truncated. */
+ if (gfc_option.warn_line_truncation && gfc_current_locus.lb != NULL
+ && gfc_current_locus.lb->truncated)
+ {
+ int maxlen = gfc_option.free_line_length;
+ gfc_current_locus.lb->truncated = 0;
+ gfc_current_locus.nextc += maxlen;
+ gfc_warning_now ("Line truncated at %L", &gfc_current_locus);
+ gfc_current_locus.nextc -= maxlen;
+ }
+
if (c != '&')
goto done;
/* If the next nonblank character is a ! or \n, we've got a
- continuation line. */
+ continuation line. */
old_loc = gfc_current_locus;
c = next_char ();
c = next_char ();
/* Character constants to be continued cannot have commentary
- after the '&'. */
+ after the '&'. */
if (in_string && c != '\n')
{
goto done;
}
+ prev_openmp_flag = openmp_flag;
continue_flag = 1;
if (c == '!')
skip_comment_line ();
else
gfc_advance_line ();
+
+ if (gfc_at_eof())
+ goto not_continuation;
+
+ /* We've got a continuation line. If we are on the very next line after
+ the last continuation, increment the continuation line count and
+ check whether the limit has been exceeded. */
+ if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1)
+ {
+ if (++continue_count == gfc_option.max_continue_free)
+ {
+ if (gfc_notification_std (GFC_STD_GNU) || pedantic)
+ gfc_warning ("Limit of %d continuations exceeded in "
+ "statement at %C", gfc_option.max_continue_free);
+ }
+ }
- /* We've got a continuation line and need to find where it continues.
- First eat any comment lines. */
- gfc_skip_comments ();
+ /* Now find where it continues. First eat any comment lines. */
+ openmp_cond_flag = skip_free_comments ();
+
+ if (gfc_current_locus.lb != NULL
+ && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb))
+ continue_line = gfc_linebuf_linenum (gfc_current_locus.lb);
+
+ if (prev_openmp_flag != openmp_flag)
+ {
+ gfc_current_locus = old_loc;
+ openmp_flag = prev_openmp_flag;
+ c = '&';
+ goto done;
+ }
/* Now that we have a non-comment line, probe ahead for the
- first non-whitespace character. If it is another '&', then
- reading starts at the next character, otherwise we must back
- up to where the whitespace started and resume from there. */
+ first non-whitespace character. If it is another '&', then
+ reading starts at the next character, otherwise we must back
+ up to where the whitespace started and resume from there. */
old_loc = gfc_current_locus;
while (gfc_is_whitespace (c))
c = next_char ();
- if (c != '&')
- gfc_current_locus = old_loc;
+ if (openmp_flag)
+ {
+ for (i = 0; i < 5; i++, c = next_char ())
+ {
+ gcc_assert (gfc_wide_tolower (c) == (unsigned char) "!$omp"[i]);
+ if (i == 4)
+ old_loc = gfc_current_locus;
+ }
+ while (gfc_is_whitespace (c))
+ c = next_char ();
+ }
+ if (c != '&')
+ {
+ if (in_string)
+ {
+ gfc_current_locus.nextc--;
+ if (gfc_option.warn_ampersand && in_string == INSTRING_WARN)
+ gfc_warning ("Missing '&' in continued character "
+ "constant at %C");
+ }
+ /* Both !$omp and !$ -fopenmp continuation lines have & on the
+ continuation line only optionally. */
+ else if (openmp_flag || openmp_cond_flag)
+ gfc_current_locus.nextc--;
+ else
+ {
+ c = ' ';
+ gfc_current_locus = old_loc;
+ goto done;
+ }
+ }
}
- else
+ else /* Fixed form. */
{
/* Fixed form continuation. */
if (!in_string && c == '!')
if (c != '\n')
goto done;
+ /* Check to see if the continuation line was truncated. */
+ if (gfc_option.warn_line_truncation && gfc_current_locus.lb != NULL
+ && gfc_current_locus.lb->truncated)
+ {
+ gfc_current_locus.lb->truncated = 0;
+ gfc_warning_now ("Line truncated at %L", &gfc_current_locus);
+ }
+
+ prev_openmp_flag = openmp_flag;
continue_flag = 1;
old_loc = gfc_current_locus;
gfc_advance_line ();
- gfc_skip_comments ();
+ skip_fixed_comments ();
/* See if this line is a continuation line. */
- for (i = 0; i < 5; i++)
+ if (openmp_flag != prev_openmp_flag)
{
- c = next_char ();
- if (c != ' ')
- goto not_continuation;
+ openmp_flag = prev_openmp_flag;
+ goto not_continuation;
}
+ if (!openmp_flag)
+ for (i = 0; i < 5; i++)
+ {
+ c = next_char ();
+ if (c != ' ')
+ goto not_continuation;
+ }
+ else
+ for (i = 0; i < 5; i++)
+ {
+ c = next_char ();
+ if (gfc_wide_tolower (c) != (unsigned char) "*$omp"[i])
+ goto not_continuation;
+ }
+
c = next_char ();
- if (c == '0' || c == ' ')
+ if (c == '0' || c == ' ' || c == '\n')
goto not_continuation;
+
+ /* We've got a continuation line. If we are on the very next line after
+ the last continuation, increment the continuation line count and
+ check whether the limit has been exceeded. */
+ if (gfc_linebuf_linenum (gfc_current_locus.lb) == continue_line + 1)
+ {
+ if (++continue_count == gfc_option.max_continue_fixed)
+ {
+ if (gfc_notification_std (GFC_STD_GNU) || pedantic)
+ gfc_warning ("Limit of %d continuations exceeded in "
+ "statement at %C",
+ gfc_option.max_continue_fixed);
+ }
+ }
+
+ if (gfc_current_locus.lb != NULL
+ && continue_line < gfc_linebuf_linenum (gfc_current_locus.lb))
+ continue_line = gfc_linebuf_linenum (gfc_current_locus.lb);
}
/* Ready to read first character of continuation line, which might
gfc_current_locus = old_loc;
done:
+ if (c == '\n')
+ continue_count = 0;
continue_flag = 0;
return c;
}
parsing character literals, they have to call
gfc_next_char_literal(). */
-int
+gfc_char_t
gfc_next_char (void)
{
- int c;
+ gfc_char_t c;
do
{
- c = gfc_next_char_literal (0);
+ c = gfc_next_char_literal (NONSTRING);
}
while (gfc_current_form == FORM_FIXED && gfc_is_whitespace (c));
- return TOLOWER (c);
+ return gfc_wide_tolower (c);
}
+char
+gfc_next_ascii_char (void)
+{
+ gfc_char_t c = gfc_next_char ();
-int
+ return (gfc_wide_fits_in_byte (c) ? (unsigned char) c
+ : (unsigned char) UCHAR_MAX);
+}
+
+
+gfc_char_t
gfc_peek_char (void)
{
locus old_loc;
- int c;
+ gfc_char_t c;
old_loc = gfc_current_locus;
c = gfc_next_char ();
}
+char
+gfc_peek_ascii_char (void)
+{
+ gfc_char_t c = gfc_peek_char ();
+
+ return (gfc_wide_fits_in_byte (c) ? (unsigned char) c
+ : (unsigned char) UCHAR_MAX);
+}
+
+
/* Recover from an error. We try to get past the current statement
and get lined up for the next. The next statement follows a '\n'
or a ';'. We also assume that we are not within a character
void
gfc_error_recovery (void)
{
- char c, delim;
+ gfc_char_t c, delim;
if (gfc_at_eof ())
return;
void
gfc_gobble_whitespace (void)
{
+ static int linenum = 0;
locus old_loc;
- int c;
+ gfc_char_t c;
do
{
old_loc = gfc_current_locus;
- c = gfc_next_char_literal (0);
+ c = gfc_next_char_literal (NONSTRING);
+ /* Issue a warning for nonconforming tabs. We keep track of the line
+ number because the Fortran matchers will often back up and the same
+ line will be scanned multiple times. */
+ if (!gfc_option.warn_tabs && c == '\t')
+ {
+ int cur_linenum = LOCATION_LINE (gfc_current_locus.lb->location);
+ if (cur_linenum != linenum)
+ {
+ linenum = cur_linenum;
+ gfc_warning_now ("Nonconforming tab character at %C");
+ }
+ }
}
while (gfc_is_whitespace (c));
In fixed mode, we expand a tab that occurs within the statement
label region to expand to spaces that leave the next character in
the source region.
- load_line returns wether the line was truncated. */
+
+ If first_char is not NULL, it's a pointer to a single char value holding
+ the first character of the line, which has already been read by the
+ caller. This avoids the use of ungetc().
+
+ load_line returns whether the line was truncated.
+
+ NOTE: The error machinery isn't available at this point, so we can't
+ easily report line and column numbers consistent with other
+ parts of gfortran. */
static int
-load_line (FILE * input, char **pbuf, int *pbuflen)
+load_line (FILE *input, gfc_char_t **pbuf, int *pbuflen, const int *first_char)
{
+ static int linenum = 0, current_line = 1;
int c, maxlen, i, preprocessor_flag, buflen = *pbuflen;
- int trunc_flag = 0;
- char *buffer;
+ int trunc_flag = 0, seen_comment = 0;
+ int seen_printable = 0, seen_ampersand = 0, quoted = ' ';
+ gfc_char_t *buffer;
+ bool found_tab = false;
/* Determine the maximum allowed line length. */
if (gfc_current_form == FORM_FREE)
- maxlen = GFC_MAX_LINE;
- else
+ maxlen = gfc_option.free_line_length;
+ else if (gfc_current_form == FORM_FIXED)
maxlen = gfc_option.fixed_line_length;
+ else
+ maxlen = 72;
if (*pbuf == NULL)
{
- /* Allocate the line buffer, storing its length into buflen. */
+ /* Allocate the line buffer, storing its length into buflen.
+ Note that if maxlen==0, indicating that arbitrary-length lines
+ are allowed, the buffer will be reallocated if this length is
+ insufficient; since 132 characters is the length of a standard
+ free-form line, we use that as a starting guess. */
if (maxlen > 0)
buflen = maxlen;
else
- buflen = GFC_MAX_LINE;
+ buflen = 132;
- *pbuf = gfc_getmem (buflen + 1);
+ *pbuf = gfc_get_wide_string (buflen + 1);
}
i = 0;
buffer = *pbuf;
- preprocessor_flag = 0;
- c = fgetc (input);
- if (c == '#')
- /* In order to not truncate preprocessor lines, we have to
- remember that this is one. */
- preprocessor_flag = 1;
- ungetc (c, input);
+ if (first_char)
+ c = *first_char;
+ else
+ c = getc (input);
+
+ /* In order to not truncate preprocessor lines, we have to
+ remember that this is one. */
+ preprocessor_flag = (c == '#' ? 1 : 0);
for (;;)
{
- c = fgetc (input);
-
if (c == EOF)
break;
+
if (c == '\n')
- break;
+ {
+ /* Check for illegal use of ampersand. See F95 Standard 3.3.1.3. */
+ if (gfc_current_form == FORM_FREE
+ && !seen_printable && seen_ampersand)
+ {
+ if (pedantic)
+ gfc_error_now ("'&' not allowed by itself in line %d",
+ current_line);
+ else
+ gfc_warning_now ("'&' not allowed by itself in line %d",
+ current_line);
+ }
+ break;
+ }
- if (c == '\r')
- continue; /* Gobble characters. */
- if (c == '\0')
- continue;
+ if (c == '\r' || c == '\0')
+ goto next_char; /* Gobble characters. */
- if (c == '\032')
+ if (c == '&')
{
- /* Ctrl-Z ends the file. */
- while (fgetc (input) != EOF);
- break;
+ if (seen_ampersand)
+ {
+ seen_ampersand = 0;
+ seen_printable = 1;
+ }
+ else
+ seen_ampersand = 1;
+ }
+
+ if ((c != '&' && c != '!' && c != ' ') || (c == '!' && !seen_ampersand))
+ seen_printable = 1;
+
+ /* Is this a fixed-form comment? */
+ if (gfc_current_form == FORM_FIXED && i == 0
+ && (c == '*' || c == 'c' || c == 'd'))
+ seen_comment = 1;
+
+ if (quoted == ' ')
+ {
+ if (c == '\'' || c == '"')
+ quoted = c;
+ }
+ else if (c == quoted)
+ quoted = ' ';
+
+ /* Is this a free-form comment? */
+ if (c == '!' && quoted == ' ')
+ seen_comment = 1;
+
+ /* Vendor extension: "<tab>1" marks a continuation line. */
+ if (found_tab)
+ {
+ found_tab = false;
+ if (c >= '1' && c <= '9')
+ {
+ *(buffer-1) = c;
+ goto next_char;
+ }
}
- if (gfc_current_form == FORM_FIXED && c == '\t' && i <= 6)
- { /* Tab expansion. */
- while (i <= 6)
+ if (gfc_current_form == FORM_FIXED && c == '\t' && i < 6)
+ {
+ found_tab = true;
+
+ if (!gfc_option.warn_tabs && seen_comment == 0
+ && current_line != linenum)
+ {
+ linenum = current_line;
+ gfc_warning_now ("Nonconforming tab character in column %d "
+ "of line %d", i+1, linenum);
+ }
+
+ while (i < 6)
{
*buffer++ = ' ';
i++;
}
- continue;
+ goto next_char;
}
*buffer++ = c;
if (i >= buflen)
{
/* Reallocate line buffer to double size to hold the
- overlong line. */
+ overlong line. */
buflen = buflen * 2;
- *pbuf = xrealloc (*pbuf, buflen + 1);
- buffer = (*pbuf)+i;
+ *pbuf = XRESIZEVEC (gfc_char_t, *pbuf, (buflen + 1));
+ buffer = (*pbuf) + i;
}
}
else if (i >= maxlen)
- {
+ {
+ bool trunc_warn = true;
+
+ /* Enhancement, if the very next non-space character is an ampersand
+ or comment that we would otherwise warn about, don't mark as
+ truncated. */
+
/* Truncate the rest of the line. */
for (;;)
{
- c = fgetc (input);
+ c = getc (input);
+ if (c == '\r' || c == ' ')
+ continue;
+
if (c == '\n' || c == EOF)
break;
- trunc_flag = 1;
+ if (!trunc_warn && c != '!')
+ trunc_warn = true;
+
+ if (trunc_warn && ((gfc_current_form == FORM_FIXED && c == '&')
+ || c == '!'))
+ trunc_warn = false;
+
+ if (c == '!')
+ seen_comment = 1;
+
+ if (trunc_warn && !seen_comment)
+ trunc_flag = 1;
}
- ungetc ('\n', input);
+ c = '\n';
+ continue;
}
+
+next_char:
+ c = getc (input);
}
/* Pad lines to the selected line length in fixed form. */
if (gfc_current_form == FORM_FIXED
- && gfc_option.fixed_line_length > 0
+ && gfc_option.fixed_line_length != 0
&& !preprocessor_flag
&& c != EOF)
- while (i++ < gfc_option.fixed_line_length)
- *buffer++ = ' ';
+ {
+ while (i++ < maxlen)
+ *buffer++ = ' ';
+ }
*buffer = '\0';
*pbuflen = buflen;
+ current_line++;
return trunc_flag;
}
{
gfc_file *f;
- f = gfc_getmem (sizeof (gfc_file));
+ f = XCNEW (gfc_file);
- f->filename = gfc_getmem (strlen (name) + 1);
- strcpy (f->filename, name);
+ f->filename = xstrdup (name);
f->next = file_head;
file_head = f;
- f->included_by = current_file;
+ f->up = current_file;
if (current_file != NULL)
f->inclusion_line = current_file->line;
-#ifdef USE_MAPPED_LOCATION
- linemap_add (&line_table, reason, false, f->filename, 1);
-#endif
+ linemap_add (line_table, reason, false, f->filename, 1);
return f;
}
+
/* Deal with a line from the C preprocessor. The
initial octothorp has already been seen. */
static void
-preprocessor_line (char *c)
+preprocessor_line (gfc_char_t *c)
{
bool flag[5];
int i, line;
- char *filename;
+ gfc_char_t *wide_filename;
gfc_file *f;
- int escaped;
+ int escaped, unescape;
+ char *filename;
c++;
while (*c == ' ' || *c == '\t')
if (*c < '0' || *c > '9')
goto bad_cpp_line;
- line = atoi (c);
+ line = wide_atoi (c);
- c = strchr (c, ' ');
+ c = wide_strchr (c, ' ');
if (c == NULL)
{
/* No file name given. Set new line number. */
goto bad_cpp_line;
++c;
- filename = c;
+ wide_filename = c;
/* Make filename end at quote. */
+ unescape = 0;
escaped = false;
- while (*c && ! (! escaped && *c == '"'))
+ while (*c && ! (!escaped && *c == '"'))
{
if (escaped)
- escaped = false;
- else
- escaped = *c == '\\';
+ escaped = false;
+ else if (*c == '\\')
+ {
+ escaped = true;
+ unescape++;
+ }
++c;
}
*c++ = '\0';
+ /* Undo effects of cpp_quote_string. */
+ if (unescape)
+ {
+ gfc_char_t *s = wide_filename;
+ gfc_char_t *d = gfc_get_wide_string (c - wide_filename - unescape);
+ wide_filename = d;
+ while (*s)
+ {
+ if (*s == '\\')
+ *d++ = *++s;
+ else
+ *d++ = *s;
+ s++;
+ }
+ *d = '\0';
+ }
/* Get flags. */
for (;;)
{
- c = strchr (c, ' ');
+ c = wide_strchr (c, ' ');
if (c == NULL)
break;
c++;
- i = atoi (c);
+ i = wide_atoi (c);
if (1 <= i && i <= 4)
flag[i] = true;
}
+ /* Convert the filename in wide characters into a filename in narrow
+ characters. */
+ filename = gfc_widechar_to_char (wide_filename, -1);
+
/* Interpret flags. */
if (flag[1]) /* Starting new file. */
{
f = get_file (filename, LC_RENAME);
- f->up = current_file;
+ add_file_change (f->filename, f->inclusion_line);
current_file = f;
}
gfc_warning_now ("%s:%d: file %s left but not entered",
current_file->filename, current_file->line,
filename);
+ if (unescape)
+ gfc_free (wide_filename);
+ gfc_free (filename);
return;
}
+
+ add_file_change (NULL, line);
current_file = current_file->up;
+ linemap_add (line_table, LC_RENAME, false, current_file->filename,
+ current_file->line);
}
/* The name of the file can be a temporary file produced by
if (strcmp (current_file->filename, filename) != 0)
{
- gfc_free (current_file->filename);
- current_file->filename = gfc_getmem (strlen (filename) + 1);
- strcpy (current_file->filename, filename);
+ /* FIXME: we leak the old filename because a pointer to it may be stored
+ in the linemap. Alternative could be using GC or updating linemap to
+ point to the new name, but there is no API for that currently. */
+ current_file->filename = xstrdup (filename);
}
/* Set new line number. */
current_file->line = line;
+ if (unescape)
+ gfc_free (wide_filename);
+ gfc_free (filename);
return;
bad_cpp_line:
}
-static try load_file (const char *, bool);
+static gfc_try load_file (const char *, const char *, bool);
/* include_line()-- Checks a line buffer to see if it is an include
line. If so, we call load_file() recursively to load the included
processed or true if we matched an include. */
static bool
-include_line (char *line)
+include_line (gfc_char_t *line)
{
- char quote, *c, *begin, *stop;
-
+ gfc_char_t quote, *c, *begin, *stop;
+ char *filename;
+
c = line;
+
+ if (gfc_option.gfc_flag_openmp)
+ {
+ if (gfc_current_form == FORM_FREE)
+ {
+ while (*c == ' ' || *c == '\t')
+ c++;
+ if (*c == '!' && c[1] == '$' && (c[2] == ' ' || c[2] == '\t'))
+ c += 3;
+ }
+ else
+ {
+ if ((*c == '!' || *c == 'c' || *c == 'C' || *c == '*')
+ && c[1] == '$' && (c[2] == ' ' || c[2] == '\t'))
+ c += 3;
+ }
+ }
+
while (*c == ' ' || *c == '\t')
c++;
- if (strncasecmp (c, "include", 7))
- return false;
+ if (gfc_wide_strncasecmp (c, "include", 7))
+ return false;
c += 7;
while (*c == ' ' || *c == '\t')
*stop = '\0'; /* It's ok to trash the buffer, as this line won't be
read by anything else. */
- load_file (begin, false);
+ filename = gfc_widechar_to_char (begin, -1);
+ if (load_file (filename, NULL, false) == FAILURE)
+ exit (1);
+
+ gfc_free (filename);
return true;
}
+
/* Load a file into memory by calling load_line until the file ends. */
-static try
-load_file (const char *filename, bool initial)
+static gfc_try
+load_file (const char *realfilename, const char *displayedname, bool initial)
{
- char *line;
+ gfc_char_t *line;
gfc_linebuf *b;
gfc_file *f;
FILE *input;
int len, line_len;
+ bool first_line;
+ const char *filename;
+
+ filename = displayedname ? displayedname : realfilename;
for (f = current_file; f; f = f->up)
if (strcmp (filename, f->filename) == 0)
{
- gfc_error_now ("File '%s' is being included recursively", filename);
+ fprintf (stderr, "%s:%d: Error: File '%s' is being included "
+ "recursively\n", current_file->filename, current_file->line,
+ filename);
return FAILURE;
}
if (initial)
{
- input = gfc_open_file (filename);
+ if (gfc_src_file)
+ {
+ input = gfc_src_file;
+ gfc_src_file = NULL;
+ }
+ else
+ input = gfc_open_file (realfilename);
if (input == NULL)
{
gfc_error_now ("Can't open file '%s'", filename);
}
else
{
- input = gfc_open_included_file (filename, false);
+ input = gfc_open_included_file (realfilename, false, false);
if (input == NULL)
{
- gfc_error_now ("Can't open included file '%s'", filename);
+ fprintf (stderr, "%s:%d: Error: Can't open included file '%s'\n",
+ current_file->filename, current_file->line, filename);
return FAILURE;
}
}
/* Load the file. */
f = get_file (filename, initial ? LC_RENAME : LC_ENTER);
- f->up = current_file;
+ if (!initial)
+ add_file_change (f->filename, f->inclusion_line);
current_file = f;
current_file->line = 1;
line = NULL;
line_len = 0;
+ first_line = true;
+
+ if (initial && gfc_src_preprocessor_lines[0])
+ {
+ preprocessor_line (gfc_src_preprocessor_lines[0]);
+ gfc_free (gfc_src_preprocessor_lines[0]);
+ gfc_src_preprocessor_lines[0] = NULL;
+ if (gfc_src_preprocessor_lines[1])
+ {
+ preprocessor_line (gfc_src_preprocessor_lines[1]);
+ gfc_free (gfc_src_preprocessor_lines[1]);
+ gfc_src_preprocessor_lines[1] = NULL;
+ }
+ }
- for (;;)
+ for (;;)
{
- int trunc = load_line (input, &line, &line_len);
+ int trunc = load_line (input, &line, &line_len, NULL);
- len = strlen (line);
+ len = gfc_wide_strlen (line);
if (feof (input) && len == 0)
break;
+ /* If this is the first line of the file, it can contain a byte
+ order mark (BOM), which we will ignore:
+ FF FE is UTF-16 little endian,
+ FE FF is UTF-16 big endian,
+ EF BB BF is UTF-8. */
+ if (first_line
+ && ((line_len >= 2 && line[0] == (unsigned char) '\xFF'
+ && line[1] == (unsigned char) '\xFE')
+ || (line_len >= 2 && line[0] == (unsigned char) '\xFE'
+ && line[1] == (unsigned char) '\xFF')
+ || (line_len >= 3 && line[0] == (unsigned char) '\xEF'
+ && line[1] == (unsigned char) '\xBB'
+ && line[2] == (unsigned char) '\xBF')))
+ {
+ int n = line[1] == (unsigned char) '\xBB' ? 3 : 2;
+ gfc_char_t *new_char = gfc_get_wide_string (line_len);
+
+ wide_strcpy (new_char, &line[n]);
+ gfc_free (line);
+ line = new_char;
+ len -= n;
+ }
+
/* There are three things this line can be: a line of Fortran
source, an include line or a C preprocessor directive. */
if (line[0] == '#')
{
- preprocessor_line (line);
- continue;
+ /* When -g3 is specified, it's possible that we emit #define
+ and #undef lines, which we need to pass to the middle-end
+ so that it can emit correct debug info. */
+ if (debug_info_level == DINFO_LEVEL_VERBOSE
+ && (wide_strncmp (line, "#define ", 8) == 0
+ || wide_strncmp (line, "#undef ", 7) == 0))
+ ;
+ else
+ {
+ preprocessor_line (line);
+ continue;
+ }
}
+ /* Preprocessed files have preprocessor lines added before the byte
+ order mark, so first_line is not about the first line of the file
+ but the first line that's not a preprocessor line. */
+ first_line = false;
+
if (include_line (line))
{
current_file->line++;
/* Add line. */
- b = gfc_getmem (gfc_linebuf_header_size + len + 1);
+ b = (gfc_linebuf *) gfc_getmem (gfc_linebuf_header_size
+ + (len + 1) * sizeof (gfc_char_t));
-#ifdef USE_MAPPED_LOCATION
b->location
- = linemap_line_start (&line_table, current_file->line++, 120);
-#else
- b->linenum = current_file->line++;
-#endif
+ = linemap_line_start (line_table, current_file->line++, 120);
b->file = current_file;
b->truncated = trunc;
- strcpy (b->line, line);
+ wide_strcpy (b->line, line);
if (line_head == NULL)
line_head = b;
line_tail->next = b;
line_tail = b;
+
+ while (file_changes_cur < file_changes_count)
+ file_changes[file_changes_cur++].lb = b;
}
/* Release the line buffer allocated in load_line. */
fclose (input);
+ if (!initial)
+ add_file_change (NULL, current_file->inclusion_line + 1);
current_file = current_file->up;
-#ifdef USE_MAPPED_LOCATION
- linemap_add (&line_table, LC_LEAVE, 0, NULL, 0);
-#endif
+ linemap_add (line_table, LC_LEAVE, 0, NULL, 0);
return SUCCESS;
}
/* Open a new file and start scanning from that file. Returns SUCCESS
- if everything went OK, FAILURE otherwise. If form == FORM_UKNOWN
+ if everything went OK, FAILURE otherwise. If form == FORM_UNKNOWN
it tries to determine the source form from the filename, defaulting
to free form. */
-try
+gfc_try
gfc_new_file (void)
{
- try result;
+ gfc_try result;
- result = load_file (gfc_source_file, true);
+ if (gfc_cpp_enabled ())
+ {
+ result = gfc_cpp_preprocess (gfc_source_file);
+ if (!gfc_cpp_preprocess_only ())
+ result = load_file (gfc_cpp_temporary_file (), gfc_source_file, true);
+ }
+ else
+ result = load_file (gfc_source_file, NULL, true);
gfc_current_locus.lb = line_head;
gfc_current_locus.nextc = (line_head == NULL) ? NULL : line_head->line;
#if 0 /* Debugging aid. */
for (; line_head; line_head = line_head->next)
- gfc_status ("%s:%3d %s\n", line_head->file->filename,
-#ifdef USE_MAPPED_LOCATION
- LOCATION_LINE (line_head->location),
-#else
- line_head->linenum,
-#endif
- line_head->line);
+ printf ("%s:%3d %s\n", LOCATION_FILE (line_head->location),
+ LOCATION_LINE (line_head->location), line_head->line);
exit (0);
#endif
return result;
}
+
+static char *
+unescape_filename (const char *ptr)
+{
+ const char *p = ptr, *s;
+ char *d, *ret;
+ int escaped, unescape = 0;
+
+ /* Make filename end at quote. */
+ escaped = false;
+ while (*p && ! (! escaped && *p == '"'))
+ {
+ if (escaped)
+ escaped = false;
+ else if (*p == '\\')
+ {
+ escaped = true;
+ unescape++;
+ }
+ ++p;
+ }
+
+ if (!*p || p[1])
+ return NULL;
+
+ /* Undo effects of cpp_quote_string. */
+ s = ptr;
+ d = XCNEWVEC (char, p + 1 - ptr - unescape);
+ ret = d;
+
+ while (s != p)
+ {
+ if (*s == '\\')
+ *d++ = *++s;
+ else
+ *d++ = *s;
+ s++;
+ }
+ *d = '\0';
+ return ret;
+}
+
+/* For preprocessed files, if the first tokens are of the form # NUM.
+ handle the directives so we know the original file name. */
+
+const char *
+gfc_read_orig_filename (const char *filename, const char **canon_source_file)
+{
+ int c, len;
+ char *dirname, *tmp;
+
+ gfc_src_file = gfc_open_file (filename);
+ if (gfc_src_file == NULL)
+ return NULL;
+
+ c = getc (gfc_src_file);
+
+ if (c != '#')
+ return NULL;
+
+ len = 0;
+ load_line (gfc_src_file, &gfc_src_preprocessor_lines[0], &len, &c);
+
+ if (wide_strncmp (gfc_src_preprocessor_lines[0], "# 1 \"", 5) != 0)
+ return NULL;
+
+ tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[0][5], -1);
+ filename = unescape_filename (tmp);
+ gfc_free (tmp);
+ if (filename == NULL)
+ return NULL;
+
+ c = getc (gfc_src_file);
+
+ if (c != '#')
+ return filename;
+
+ len = 0;
+ load_line (gfc_src_file, &gfc_src_preprocessor_lines[1], &len, &c);
+
+ if (wide_strncmp (gfc_src_preprocessor_lines[1], "# 1 \"", 5) != 0)
+ return filename;
+
+ tmp = gfc_widechar_to_char (&gfc_src_preprocessor_lines[1][5], -1);
+ dirname = unescape_filename (tmp);
+ gfc_free (tmp);
+ if (dirname == NULL)
+ return filename;
+
+ len = strlen (dirname);
+ if (len < 3 || dirname[len - 1] != '/' || dirname[len - 2] != '/')
+ {
+ gfc_free (dirname);
+ return filename;
+ }
+ dirname[len - 2] = '\0';
+ set_src_pwd (dirname);
+
+ if (! IS_ABSOLUTE_PATH (filename))
+ {
+ char *p = XCNEWVEC (char, len + strlen (filename));
+
+ memcpy (p, dirname, len - 2);
+ p[len - 2] = '/';
+ strcpy (p + len - 1, filename);
+ *canon_source_file = p;
+ }
+
+ gfc_free (dirname);
+ return filename;
+}
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