cppfiles.c: Update comments.
* cppfiles.c: Update comments. (destroy_include_file_node): Rename destroy_node. (find_or_create_entry): New function. (open_file, _cpp_fake_include): Use it. (handle_missing_header): New function, broken out of _cpp_execute include. Don't segfault if there is no system or quoted path. (_cpp_execute_include): Use handle_missing_header. From-SVN: r40423
This commit is contained in:
Neil Booth
Neil Booth
parent
e6ff97b1c4
commit
a36c54faba
@ -1,3 +1,14 @@
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2001-03-12 Neil Booth <neil@daikokuya.demon.co.uk>
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* cppfiles.c: Update comments.
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(destroy_include_file_node): Rename destroy_node.
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(find_or_create_entry): New function.
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(open_file, _cpp_fake_include): Use it.
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(handle_missing_header): New function, broken out of
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_cpp_execute include. Don't segfault if there is no
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system or quoted path.
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(_cpp_execute_include): Use handle_missing_header.
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2001-03-12 Jeffrey Oldham <oldham@codesourcery.com>
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* jump.c (reversed_comparison_code_parts): Reverse Jan Hubricka's
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219
gcc/cppfiles.c
219
gcc/cppfiles.c
@ -97,27 +97,24 @@ static struct include_file *open_file PARAMS ((cpp_reader *, const char *));
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static void read_include_file PARAMS ((cpp_reader *, struct include_file *));
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static void stack_include_file PARAMS ((cpp_reader *, struct include_file *));
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static void purge_cache PARAMS ((struct include_file *));
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static void destroy_include_file_node PARAMS ((splay_tree_value));
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static void destroy_node PARAMS ((splay_tree_value));
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static int report_missing_guard PARAMS ((splay_tree_node, void *));
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static splay_tree_node find_or_create_entry PARAMS ((cpp_reader *,
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const char *));
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static void handle_missing_header PARAMS ((cpp_reader *, const char *, int));
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/* We use a splay tree to store information about all the include
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files seen in this compilation. The key of each tree node is the
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physical path to the file. The value is 0 if the file does not
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exist, or a struct include_file pointer. */
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/* Set up the splay tree we use to store information about all the
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file names seen in this compilation. We also have entries for each
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file we tried to open but failed; this saves system calls since we
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don't try to open it again in future.
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static void
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destroy_include_file_node (v)
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splay_tree_value v;
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{
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struct include_file *f = (struct include_file *)v;
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if (f)
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{
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purge_cache (f);
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free (f); /* The tree is registered with free to free f->name. */
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}
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}
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The key of each node is the file name, after processing by
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_cpp_simplify_pathname. The path name may or may not be absolute.
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The path string has been malloced, as is automatically freed by
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registering free () as the splay tree key deletion function.
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A node's value is a pointer to a struct include_file, and is never
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NULL. */
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void
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_cpp_init_includes (pfile)
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cpp_reader *pfile;
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@ -125,9 +122,10 @@ _cpp_init_includes (pfile)
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pfile->all_include_files
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= splay_tree_new ((splay_tree_compare_fn) strcmp,
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(splay_tree_delete_key_fn) free,
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destroy_include_file_node);
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destroy_node);
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}
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/* Tear down the splay tree. */
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void
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_cpp_cleanup_includes (pfile)
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cpp_reader *pfile;
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@ -135,6 +133,20 @@ _cpp_cleanup_includes (pfile)
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splay_tree_delete (pfile->all_include_files);
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}
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/* Free a node. The path string is automatically freed. */
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static void
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destroy_node (v)
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splay_tree_value v;
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{
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struct include_file *f = (struct include_file *)v;
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if (f)
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{
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purge_cache (f);
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free (f);
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}
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}
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/* Mark a file to not be reread (e.g. #import, read failure). */
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void
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_cpp_never_reread (file)
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@ -143,24 +155,36 @@ _cpp_never_reread (file)
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file->cmacro = NEVER_REREAD;
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}
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/* Put a file name in the splay tree, for the sake of cpp_included ().
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Assume that FNAME has already had its path simplified. */
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/* Lookup a simplified filename, and create an entry if none exists. */
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static splay_tree_node
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find_or_create_entry (pfile, fname)
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cpp_reader *pfile;
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const char *fname;
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{
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splay_tree_node node;
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struct include_file *file;
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node = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) fname);
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if (! node)
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{
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file = xcnew (struct include_file);
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file->name = xstrdup (fname);
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node = splay_tree_insert (pfile->all_include_files,
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(splay_tree_key) file->name,
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(splay_tree_value) file);
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}
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return node;
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}
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/* Enter a simplified file name in the splay tree, for the sake of
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cpp_included (). */
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void
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_cpp_fake_include (pfile, fname)
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cpp_reader *pfile;
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const char *fname;
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{
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splay_tree_node nd;
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nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) fname);
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if (! nd)
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{
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struct include_file *file = xcnew (struct include_file);
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file->name = xstrdup (fname);
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splay_tree_insert (pfile->all_include_files,
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(splay_tree_key) file->name,
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(splay_tree_value) file);
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}
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find_or_create_entry (pfile, fname);
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}
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/* Given a file name, look it up in the cache; if there is no entry,
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@ -178,36 +202,20 @@ open_file (pfile, filename)
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cpp_reader *pfile;
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const char *filename;
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{
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splay_tree_node nd;
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struct include_file *file;
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splay_tree_node nd = find_or_create_entry (pfile, filename);
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struct include_file *file = (struct include_file *) nd->value;
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nd = splay_tree_lookup (pfile->all_include_files, (splay_tree_key) filename);
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/* Don't retry opening if we failed previously. */
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if (file->fd == -2)
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return 0;
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if (nd)
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{
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file = (struct include_file *) nd->value;
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/* Don't reopen an idempotent file. */
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if (DO_NOT_REREAD (file))
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return file;
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/* Don't retry opening if we failed previously. */
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if (file->fd == -2)
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return 0;
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/* Don't reopen an idempotent file. */
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if (DO_NOT_REREAD (file))
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return file;
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/* Don't reopen one which is already loaded. */
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if (file->buffer != NULL)
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return file;
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}
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else
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{
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/* In particular, this clears foundhere. */
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file = xcnew (struct include_file);
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file->name = xstrdup (filename);
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splay_tree_insert (pfile->all_include_files,
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(splay_tree_key) file->name,
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(splay_tree_value) file);
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}
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/* Don't reopen one which is already loaded. */
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if (file->buffer != NULL)
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return file;
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/* We used to open files in nonblocking mode, but that caused more
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problems than it solved. Do take care not to acquire a
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@ -568,6 +576,54 @@ report_missing_guard (n, b)
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return 0;
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}
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/* Create a dependency, or issue an error message as appropriate. */
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static void
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handle_missing_header (pfile, fname, angle_brackets)
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cpp_reader *pfile;
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const char *fname;
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int angle_brackets;
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{
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/* We will try making the RHS pfile->buffer->sysp after 3.0. */
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int print_dep = CPP_PRINT_DEPS(pfile) > (angle_brackets
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|| pfile->system_include_depth);
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if (CPP_OPTION (pfile, print_deps_missing_files) && print_dep)
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{
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if (!angle_brackets || IS_ABSOLUTE_PATHNAME (fname))
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deps_add_dep (pfile->deps, fname);
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else
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{
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/* If requested as a system header, assume it belongs in
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the first system header directory. */
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struct search_path *ptr = CPP_OPTION (pfile, bracket_include);
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char *p;
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int len = 0, fname_len = strlen (fname);
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if (ptr)
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len = ptr->len;
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p = (char *) alloca (len + fname_len + 2);
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if (len)
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{
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memcpy (p, ptr->name, len);
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p[len++] = '/';
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}
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memcpy (p + len, fname, fname_len + 1);
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_cpp_simplify_pathname (p);
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deps_add_dep (pfile->deps, p);
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}
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}
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/* If -M was specified, and this header file won't be added to
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the dependency list, then don't count this as an error,
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because we can still produce correct output. Otherwise, we
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can't produce correct output, because there may be
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dependencies we need inside the missing file, and we don't
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know what directory this missing file exists in. */
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else if (CPP_PRINT_DEPS (pfile) && ! print_dep)
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cpp_warning (pfile, "No include path in which to find %s", fname);
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else
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cpp_error_from_errno (pfile, fname);
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}
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void
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_cpp_execute_include (pfile, header, no_reinclude, include_next)
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cpp_reader *pfile;
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@ -579,7 +635,6 @@ _cpp_execute_include (pfile, header, no_reinclude, include_next)
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unsigned int angle_brackets = header->type == CPP_HEADER_NAME;
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const char *fname = (const char *) header->val.str.text;
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struct include_file *inc;
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int print_dep;
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/* Help protect #include or similar from recursion. */
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if (pfile->buffer_stack_depth >= CPP_STACK_MAX)
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@ -652,53 +707,9 @@ _cpp_execute_include (pfile, header, no_reinclude, include_next)
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fprintf (stderr, " %s\n", inc->name);
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}
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}
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return;
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}
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/* We will try making the RHS pfile->buffer->sysp after 3.0. */
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print_dep = CPP_PRINT_DEPS(pfile) > (angle_brackets
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|| pfile->system_include_depth);
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if (CPP_OPTION (pfile, print_deps_missing_files) && print_dep)
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{
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if (!angle_brackets || IS_ABSOLUTE_PATHNAME (fname))
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deps_add_dep (pfile->deps, fname);
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else
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{
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char *p;
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struct search_path *ptr;
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int len;
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/* If requested as a system header, assume it belongs in
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the first system header directory. */
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if (CPP_OPTION (pfile, bracket_include))
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ptr = CPP_OPTION (pfile, bracket_include);
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else
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ptr = CPP_OPTION (pfile, quote_include);
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/* FIXME: ptr can be null, no? */
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len = ptr->len;
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p = (char *) alloca (len + header->val.str.len + 2);
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if (len)
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{
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memcpy (p, ptr->name, len);
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p[len++] = '/';
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}
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memcpy (p + len, fname, header->val.str.len + 1);
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_cpp_simplify_pathname (p);
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deps_add_dep (pfile->deps, p);
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}
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}
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/* If -M was specified, and this header file won't be added to
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the dependency list, then don't count this as an error,
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because we can still produce correct output. Otherwise, we
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can't produce correct output, because there may be
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dependencies we need inside the missing file, and we don't
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know what directory this missing file exists in. */
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else if (CPP_PRINT_DEPS (pfile) && ! print_dep)
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cpp_warning (pfile, "No include path in which to find %s", fname);
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else
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cpp_error_from_errno (pfile, fname);
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handle_missing_header (pfile, fname, angle_brackets);
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}
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/* Locate file F, and determine whether it is newer than PFILE. Return -1,
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