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* load.c (scm_internal_parse_path): Renamed from scm_parse_path.
(scm_parse_path, scm_search_path): New Scheme level procedures.
This commit is contained in:
Mikael Djurfeldt
parent
f9bb0fe1a3
commit
04e8fb0adf
1 changed files with 72 additions and 30 deletions
102
libguile/load.c
102
libguile/load.c
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@ -148,7 +148,7 @@ static SCM *scm_loc_load_extensions;
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environment variable (i.e. a colon-separated list of strings), and
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prepend the elements to TAIL. */
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SCM
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scm_parse_path (char *path, SCM tail)
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scm_internal_parse_path (char *path, SCM tail)
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{
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if (path && path[0] != '\0')
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{
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@ -171,6 +171,23 @@ scm_parse_path (char *path, SCM tail)
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}
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SCM_PROC (s_parse_path, "parse-path", 1, 1, 0, scm_parse_path);
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SCM
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scm_parse_path (SCM path, SCM tail)
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{
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SCM_ASSERT (SCM_FALSEP (path) || (SCM_NIMP (path) && SCM_ROSTRINGP (path)),
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path,
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SCM_ARG1,
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s_parse_path);
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if (SCM_UNBNDP (tail))
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tail = SCM_EOL;
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return (SCM_FALSEP (path)
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? tail
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: scm_internal_parse_path (SCM_ROCHARS (path), tail));
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}
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/* Initialize the global variable %load-path, given the value of the
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SCM_SITE_DIR and SCM_LIBRARY_DIR preprocessor symbols and the
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GUILE_LOAD_PATH environment variable. */
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@ -194,39 +211,41 @@ scm_init_load_path ()
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fprintf (stderr, "guile: warning: SCHEME_LOAD_PATH variable will be"
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" removed by Guile 1.4;\n"
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" use GUILE_LOAD_PATH instead\n");
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path = scm_parse_path (p, path);
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path = scm_internal_parse_path (p, path);
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}
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}
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path = scm_parse_path (getenv ("GUILE_LOAD_PATH"), path);
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path = scm_internal_parse_path (getenv ("GUILE_LOAD_PATH"), path);
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*scm_loc_load_path = path;
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}
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SCM scm_listofnullstr;
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/* Search %load-path for a directory containing a file named FILENAME.
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/* Search PATH for a directory containing a file named FILENAME.
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The file must be readable, and not a directory.
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If we find one, return its full filename; otherwise, return #f.
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If FILENAME is absolute, return it unchanged. */
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SCM_PROC(s_sys_search_load_path, "%search-load-path", 1, 0, 0, scm_sys_search_load_path);
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SCM_PROC(s_search_path, "search-path", 2, 1, 0, scm_search_path);
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SCM
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scm_sys_search_load_path (filename)
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scm_search_path (path, filename, extensions)
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SCM path;
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SCM filename;
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SCM extensions;
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{
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SCM path = *scm_loc_load_path;
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SCM exts = *scm_loc_load_extensions;
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char *buf;
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int filename_len;
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int max_path_len;
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int max_ext_len;
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SCM_ASSERT (scm_ilength (path) >= 0, path, SCM_ARG1, s_search_path);
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SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
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SCM_ARG1, s_sys_search_load_path);
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SCM_ASSERT (scm_ilength (path) >= 0, path, "load path is not a proper list",
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s_sys_search_load_path);
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SCM_ASSERT (scm_ilength (exts) >= 0, exts,
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"load extension list is not a proper list",
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s_sys_search_load_path);
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SCM_ARG2, s_search_path);
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if (SCM_UNBNDP (extensions))
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extensions = scm_listofnullstr;
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else
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SCM_ASSERT (scm_ilength (extensions) >= 0, extensions,
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SCM_ARG3, s_search_path);
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filename_len = SCM_ROLENGTH (filename);
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/* If FILENAME is absolute, return it unchanged. */
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@ -243,8 +262,8 @@ scm_sys_search_load_path (filename)
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{
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SCM elt = SCM_CAR (walk);
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SCM_ASSERT (SCM_NIMP (elt) && SCM_ROSTRINGP (elt), elt,
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"load path is not a list of strings",
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s_sys_search_load_path);
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"path is not a list of strings",
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s_search_path);
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if (SCM_LENGTH (elt) > max_path_len)
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max_path_len = SCM_LENGTH (elt);
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}
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@ -256,12 +275,12 @@ scm_sys_search_load_path (filename)
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SCM walk;
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max_ext_len = 0;
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for (walk = exts; SCM_NIMP (walk); walk = SCM_CDR (walk))
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for (walk = extensions; SCM_NIMP (walk); walk = SCM_CDR (walk))
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{
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SCM elt = SCM_CAR (walk);
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SCM_ASSERT (SCM_NIMP (elt) && SCM_ROSTRINGP (elt), elt,
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"load extension list is not a list of strings",
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s_sys_search_load_path);
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"extension list is not a list of strings",
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s_search_path);
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if (SCM_LENGTH (elt) > max_ext_len)
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max_ext_len = SCM_LENGTH (elt);
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}
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@ -270,19 +289,17 @@ scm_sys_search_load_path (filename)
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SCM_DEFER_INTS;
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buf = scm_must_malloc (max_path_len + 1 + filename_len + max_ext_len + 1,
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s_sys_search_load_path);
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s_search_path);
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/* Try every path element. At this point, we know it's a proper
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list of strings. */
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for (; SCM_NIMP (path); path = SCM_CDR (path))
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{
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SCM path_elt = SCM_CAR (path);
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SCM path_elt = SCM_CAR (path), exts;
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/* Try every extension. At this point, we know it's a proper
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list of strings. */
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for (exts = *scm_loc_load_extensions;
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SCM_NIMP (exts);
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exts = SCM_CDR (exts))
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for (exts = extensions; SCM_NIMP (exts); exts = SCM_CDR (exts))
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{
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SCM ext_elt = SCM_CAR (exts);
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int i;
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@ -320,6 +337,30 @@ scm_sys_search_load_path (filename)
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}
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/* Search %load-path for a directory containing a file named FILENAME.
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The file must be readable, and not a directory.
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If we find one, return its full filename; otherwise, return #f.
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If FILENAME is absolute, return it unchanged. */
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SCM_PROC(s_sys_search_load_path, "%search-load-path", 1, 0, 0, scm_sys_search_load_path);
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SCM
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scm_sys_search_load_path (filename)
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SCM filename;
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{
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SCM path = *scm_loc_load_path;
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SCM exts = *scm_loc_load_extensions;
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SCM_ASSERT (SCM_NIMP (filename) && SCM_ROSTRINGP (filename), filename,
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SCM_ARG1, s_sys_search_load_path);
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SCM_ASSERT (scm_ilength (path) >= 0, path, "load path is not a proper list",
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s_sys_search_load_path);
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SCM_ASSERT (scm_ilength (exts) >= 0, exts,
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"load extension list is not a proper list",
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s_sys_search_load_path);
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return scm_search_path (path,
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filename,
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exts);
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}
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SCM_PROC(s_primitive_load_path, "primitive-load-path", 1, 0, 0, scm_primitive_load_path);
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SCM
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scm_primitive_load_path (filename)
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@ -388,13 +429,14 @@ init_build_info ()
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void
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scm_init_load ()
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{
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scm_loc_load_path = SCM_CDRLOC(scm_sysintern("%load-path", SCM_EOL));
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scm_listofnullstr = scm_permanent_object (SCM_LIST1 (scm_nullstr));
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scm_loc_load_path = SCM_CDRLOC (scm_sysintern ("%load-path", SCM_EOL));
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scm_loc_load_extensions
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= SCM_CDRLOC(scm_sysintern("%load-extensions",
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scm_listify (scm_makfrom0str (""),
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scm_makfrom0str (".scm"),
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SCM_UNDEFINED)));
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scm_loc_load_hook = SCM_CDRLOC(scm_sysintern("%load-hook", SCM_BOOL_F));
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= SCM_CDRLOC (scm_sysintern ("%load-extensions",
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scm_listify (scm_makfrom0str (""),
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scm_makfrom0str (".scm"),
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SCM_UNDEFINED)));
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scm_loc_load_hook = SCM_CDRLOC (scm_sysintern ("%load-hook", SCM_BOOL_F));
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init_build_info ();
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