const unsigned char *buffer; /* pointer to cached file contents */
struct stat st; /* copy of stat(2) data for file */
int fd; /* fd open on file (short term storage only) */
+ int err_no; /* errno obtained if opening a file failed */
unsigned short include_count; /* number of times file has been read */
unsigned short refcnt; /* number of stacked buffers using this file */
unsigned char mapped; /* file buffer is mmapped */
};
+/* Variable length record files on VMS will have a stat size that includes
+ record control characters that won't be included in the read size. */
+#ifdef VMS
+# define FAB_C_VAR 2 /* variable length records (see Starlet fabdef.h) */
+# define STAT_SIZE_TOO_BIG(ST) ((ST).st_fab_rfm == FAB_C_VAR)
+#else
+# define STAT_SIZE_TOO_BIG(ST) 0
+#endif
+
/* The cmacro works like this: If it's NULL, the file is to be
included again. If it's NEVER_REREAD, the file is never to be
included again. Otherwise it is a macro hashnode, and the file is
enum include_type));
static struct include_file *open_file PARAMS ((cpp_reader *, const char *));
static int read_include_file PARAMS ((cpp_reader *, struct include_file *));
-static void stack_include_file PARAMS ((cpp_reader *, struct include_file *));
+static bool stack_include_file PARAMS ((cpp_reader *, struct include_file *));
static void purge_cache PARAMS ((struct include_file *));
static void destroy_node PARAMS ((splay_tree_value));
static int report_missing_guard PARAMS ((splay_tree_node, void *));
{
file = xcnew (struct include_file);
file->name = name;
+ file->err_no = errno;
node = splay_tree_insert (pfile->all_include_files,
(splay_tree_key) file->name,
(splay_tree_value) file);
splay_tree_node nd = find_or_create_entry (pfile, filename);
struct include_file *file = (struct include_file *) nd->value;
- if (errno)
- file->fd = -2;
-
- /* Don't retry opening if we failed previously. */
- if (file->fd == -2)
- return 0;
+ if (file->err_no)
+ {
+ /* Ugh. handle_missing_header () needs errno to be set. */
+ errno = file->err_no;
+ return 0;
+ }
- /* Don't reopen an idempotent file. */
+ /* Don't reopen an idempotent file. */
if (DO_NOT_REREAD (file))
return file;
- /* Don't reopen one which is already loaded. */
+ /* Don't reopen one which is already loaded. */
if (file->buffer != NULL)
return file;
if (file->fd != -1 && fstat (file->fd, &file->st) == 0)
{
+ if (!S_ISDIR (file->st.st_mode))
+ return file;
+
/* If it's a directory, we return null and continue the search
as the file we're looking for may appear elsewhere in the
search path. */
- if (S_ISDIR (file->st.st_mode))
- errno = ENOENT;
- else
- {
- /* Mark a regular, zero-length file never-reread now. */
- if (S_ISREG (file->st.st_mode) && file->st.st_size == 0)
- {
- _cpp_never_reread (file);
- close (file->fd);
- file->fd = -1;
- }
-
- return file;
- }
+ errno = ENOENT;
+ close (file->fd);
+ file->fd = -1;
}
- /* Don't issue an error message if the file doesn't exist. */
- if (errno != ENOENT && errno != ENOTDIR)
- cpp_error_from_errno (pfile, file->name);
-
- /* Create a negative node for this path, and return null. */
- file->fd = -2;
-
+ file->err_no = errno;
return 0;
}
-/* Place the file referenced by INC into a new buffer on PFILE's
- stack. If there are errors, or the file should not be re-included,
- a null (zero-length) buffer is pushed. */
+/* Place the file referenced by INC into a new buffer on the buffer
+ stack, unless there are errors, or the file is not re-included
+ because of e.g. multiple-include guards. Returns true if a buffer
+ is stacked. */
-static void
+static bool
stack_include_file (pfile, inc)
cpp_reader *pfile;
struct include_file *inc;
{
- size_t len = 0;
cpp_buffer *fp;
- int sysp, deps_sysp;
+ int sysp;
+ const char *filename;
+
+ if (DO_NOT_REREAD (inc))
+ return false;
- /* We'll try removing deps_sysp after the release of 3.0. */
- deps_sysp = pfile->system_include_depth != 0;
- sysp = MAX ((pfile->buffer ? pfile->buffer->sysp : 0),
+ sysp = MAX ((pfile->map ? pfile->map->sysp : 0),
(inc->foundhere ? inc->foundhere->sysp : 0));
/* For -M, add the file to the dependencies on its first inclusion. */
- if (CPP_OPTION (pfile, print_deps) > deps_sysp && !inc->include_count)
+ if (CPP_OPTION (pfile, print_deps) > sysp && !inc->include_count)
deps_add_dep (pfile->deps, inc->name);
/* Not in cache? */
- if (! DO_NOT_REREAD (inc) && ! inc->buffer)
+ if (! inc->buffer)
{
- /* If an error occurs, do not try to read this file again. */
if (read_include_file (pfile, inc))
+ {
+ /* If an error occurs, do not try to read this file again. */
+ _cpp_never_reread (inc);
+ return false;
+ }
+ /* Mark a regular, zero-length file never-reread. We read it,
+ NUL-terminate it, and stack it once, so preprocessing a main
+ file of zero length does not raise an error. */
+ if (S_ISREG (inc->st.st_mode) && inc->st.st_size == 0)
_cpp_never_reread (inc);
close (inc->fd);
inc->fd = -1;
}
- if (! DO_NOT_REREAD (inc))
- {
- len = inc->st.st_size;
- if (pfile->buffer)
- {
- /* We don't want MI guard advice for the main file. */
- inc->include_count++;
-
- /* Handle -H option. */
- if (CPP_OPTION (pfile, print_include_names))
- {
- for (fp = pfile->buffer; fp; fp = fp->prev)
- putc ('.', stderr);
- fprintf (stderr, " %s\n", inc->name);
- }
- }
- }
+ if (pfile->buffer)
+ /* We don't want MI guard advice for the main file. */
+ inc->include_count++;
/* Push a buffer. */
- fp = cpp_push_buffer (pfile, inc->buffer, len, BUF_FILE, inc->name);
+ fp = cpp_push_buffer (pfile, inc->buffer, inc->st.st_size,
+ /* from_stage3 */ CPP_OPTION (pfile, preprocessed), 0);
fp->inc = inc;
fp->inc->refcnt++;
- fp->sysp = sysp;
/* Initialise controlling macro state. */
- pfile->mi_state = MI_OUTSIDE;
+ pfile->mi_valid = true;
pfile->mi_cmacro = 0;
- pfile->include_depth++;
/* Generate the call back. */
- fp->lineno = 0;
- _cpp_do_file_change (pfile, FC_ENTER, 0, 0);
- fp->lineno = 1;
+ filename = inc->name;
+ if (*filename == '\0')
+ filename = _("<stdin>");
+ _cpp_do_file_change (pfile, LC_ENTER, filename, 1, sysp);
+
+ return true;
}
/* Read the file referenced by INC into the file cache.
if (pagesize == -1)
pagesize = getpagesize ();
- if (size / pagesize >= MMAP_THRESHOLD)
+ /* Use mmap if the file is big enough to be worth it (controlled
+ by MMAP_THRESHOLD) and if we can safely count on there being
+ at least one readable NUL byte after the end of the file's
+ contents. This is true for all tested operating systems when
+ the file size is not an exact multiple of the page size. */
+ if (size / pagesize >= MMAP_THRESHOLD
+ && (size % pagesize) != 0)
{
buf = (U_CHAR *) mmap (0, size, PROT_READ, MAP_PRIVATE, inc->fd, 0);
if (buf == (U_CHAR *)-1)
else
#endif
{
- buf = (U_CHAR *) xmalloc (size);
+ buf = (U_CHAR *) xmalloc (size + 1);
offset = 0;
while (offset < size)
{
goto perror_fail;
if (count == 0)
{
- cpp_warning (pfile, "%s is shorter than expected", inc->name);
+ if (!STAT_SIZE_TOO_BIG (inc->st))
+ cpp_warning
+ (pfile, "%s is shorter than expected", inc->name);
+ buf = xrealloc (buf, offset);
+ inc->st.st_size = offset;
break;
}
offset += count;
}
+ /* The lexer requires that the buffer be NUL-terminated. */
+ buf[size] = '\0';
}
}
else if (S_ISBLK (inc->st.st_mode))
bigger than the majority of C source files. */
size = 8 * 1024;
- buf = (U_CHAR *) xmalloc (size);
+ buf = (U_CHAR *) xmalloc (size + 1);
offset = 0;
while ((count = read (inc->fd, buf + offset, size - offset)) > 0)
{
offset += count;
if (offset == size)
- buf = xrealloc (buf, (size *= 2));
+ {
+ size *= 2;
+ buf = xrealloc (buf, size + 1);
+ }
}
if (count < 0)
goto perror_fail;
- if (offset < size)
- buf = xrealloc (buf, offset);
+ if (offset + 1 < size)
+ buf = xrealloc (buf, offset + 1);
+
+ /* The lexer requires that the buffer be NUL-terminated. */
+ buf[offset] = '\0';
inc->st.st_size = offset;
}
if (path == NULL)
{
- cpp_error (pfile, "No include path in which to find %s", fname);
+ cpp_error (pfile, "no include path in which to find %s", fname);
return NO_INCLUDE_PATH;
}
name = (char *) alloca (strlen (fname) + pfile->max_include_len + 2);
for (; path; path = path->next)
{
- memcpy (name, path->name, path->len);
- name[path->len] = '/';
- strcpy (&name[path->len + 1], fname);
+ int len = path->len;
+ memcpy (name, path->name, len);
+ /* Don't turn / into // or // into ///; // may be a namespace
+ escape. */
+ if (name[len-1] == '/')
+ len--;
+ name[len] = '/';
+ strcpy (&name[len + 1], fname);
if (CPP_OPTION (pfile, remap))
n = remap_filename (pfile, name, path);
else
/* 1 = system header, 2 = system header to be treated as C. */
if (syshdr)
flags = 1 + (externc != 0);
- pfile->buffer->sysp = flags;
- _cpp_do_file_change (pfile, FC_RENAME, pfile->buffer->nominal_fname,
- pfile->buffer->lineno);
+ _cpp_do_file_change (pfile, LC_RENAME, pfile->map->to_file,
+ SOURCE_LINE (pfile->map, pfile->line), flags);
}
/* Report on all files that might benefit from a multiple include guard.
return 0;
}
-/* Create a dependency, or issue an error message as appropriate. */
+/* Create a dependency, or issue an error message as appropriate. */
static void
handle_missing_header (pfile, fname, angle_brackets)
cpp_reader *pfile;
const char *fname;
int angle_brackets;
{
- /* We will try making the RHS pfile->buffer->sysp after 3.0. */
- int print_dep = CPP_PRINT_DEPS(pfile) > (angle_brackets
- || pfile->system_include_depth);
+ int print_dep = CPP_PRINT_DEPS(pfile) > (angle_brackets || pfile->map->sysp);
if (CPP_OPTION (pfile, print_deps_missing_files) && print_dep)
{
we can still produce correct output. Otherwise, we can't produce
correct output, because there may be dependencies we need inside
the missing file, and we don't know what directory this missing
- file exists in. FIXME: Use a future cpp_diagnotic_with_errno ()
+ file exists in. FIXME: Use a future cpp_diagnostic_with_errno ()
for both of these cases. */
else if (CPP_PRINT_DEPS (pfile) && ! print_dep)
cpp_warning (pfile, "%s: %s", fname, xstrerror (errno));
cpp_error_from_errno (pfile, fname);
}
-/* Returns non-zero if a buffer was stacked. */
-int
+/* Handles #include-family directives, and the command line -imacros
+ and -include. Returns true if a buffer was stacked. */
+bool
_cpp_execute_include (pfile, header, type)
cpp_reader *pfile;
const cpp_token *header;
enum include_type type;
{
+ bool stacked = false;
struct include_file *inc = find_include_file (pfile, header, type);
if (inc == 0)
header->type == CPP_HEADER_NAME);
else if (inc != NO_INCLUDE_PATH)
{
- if (header->type == CPP_HEADER_NAME)
- pfile->system_include_depth++;
-
- stack_include_file (pfile, inc);
+ stacked = stack_include_file (pfile, inc);
if (type == IT_IMPORT)
_cpp_never_reread (inc);
-
- return 1;
}
- return 0;
+ return stacked;
}
/* Locate HEADER, and determine whether it is newer than the current
}
-/* Push an input buffer and load it up with the contents of FNAME.
- If FNAME is "", read standard input. */
-int
+/* Push an input buffer and load it up with the contents of FNAME. If
+ FNAME is "", read standard input. Return true if a buffer was
+ stacked. */
+bool
_cpp_read_file (pfile, fname)
cpp_reader *pfile;
const char *fname;
if (f == NULL)
{
cpp_error_from_errno (pfile, fname);
- return 0;
+ return false;
}
- stack_include_file (pfile, f);
- return 1;
+ return stack_include_file (pfile, f);
}
/* Do appropriate cleanup when a file buffer is popped off the input
- stack. */
+ stack. Push the next -include file, if any remain. */
void
-_cpp_pop_file_buffer (pfile, buf)
+_cpp_pop_file_buffer (pfile, inc)
cpp_reader *pfile;
- cpp_buffer *buf;
+ struct include_file *inc;
{
- struct include_file *inc = buf->inc;
-
- if (pfile->system_include_depth)
- pfile->system_include_depth--;
- if (pfile->include_depth)
- pfile->include_depth--;
-
/* Record the inclusion-preventing macro, which could be NULL
- meaning no controlling macro, if we haven't got it already. */
- if (pfile->mi_state == MI_OUTSIDE && inc->cmacro == NULL)
+ meaning no controlling macro. */
+ if (pfile->mi_valid && inc->cmacro == NULL)
inc->cmacro = pfile->mi_cmacro;
/* Invalidate control macros in the #including file. */
- pfile->mi_state = MI_FAILED;
+ pfile->mi_valid = false;
inc->refcnt--;
if (inc->refcnt == 0 && DO_NOT_REREAD (inc))
purge_cache (inc);
+
+ /* Don't generate a callback for popping the main file. */
+ if (pfile->buffer)
+ {
+ _cpp_do_file_change (pfile, LC_LEAVE, 0, 0, 0);
+
+ /* Finally, push the next -included file, if any. */
+ if (!pfile->buffer->prev)
+ _cpp_push_next_buffer (pfile);
+ }
}
/* Returns the first place in the include chain to start searching for
if (dlen)
{
/* We don't guarantee NAME is null-terminated. This saves
- allocating and freeing memory, and duplicating it when faking
- buffers in cpp_push_buffer. Drop a trailing '/'. */
+ allocating and freeing memory. Drop a trailing '/'. */
buffer->dir.name = buffer->inc->name;
if (dlen > 1)
dlen--;
buffer->dir.len = dlen;
buffer->dir.next = CPP_OPTION (pfile, quote_include);
- buffer->dir.sysp = buffer->sysp;
+ buffer->dir.sysp = pfile->map->sysp;
}
return &buffer->dir;
cpp_reader *pfile;
const char *dirname;
{
- register struct file_name_map_list *map_list_ptr;
+ struct file_name_map_list *map_list_ptr;
char *name;
FILE *f;
result = stat (path, &s);
#endif
+ /* There's no guarantee that errno will be unchanged, even on
+ success. Cygwin's lstat(), for example, will often set errno to
+ ENOSYS. In case of success, reset errno to zero. */
+ if (result == 0)
+ errno = 0;
+
return result == 0 && S_ISDIR (s.st_mode);
}
return path;
#if defined (HAVE_DOS_BASED_FILE_SYSTEM)
- /* Convert all backslashes to slashes. */
+ /* Convert all backslashes to slashes. */
for (from = path; *from; from++)
if (*from == '\\') *from = '/';
- /* Skip over leading drive letter if present. */
+ /* Skip over leading drive letter if present. */
if (ISALPHA (path[0]) && path[1] == ':')
from = to = &path[2];
else
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