/* Copyright (C) 1995, 1996, 1998, 1999, 2000, 2001, 2004, 2006, 2008, * 2009, 2010, 2011, 2012, 2013, 2014 Free Software Foundation, Inc. * * This library is free software; you can redistribute it and/or * modify it under the terms of the GNU Lesser General Public License * as published by the Free Software Foundation; either version 3 of * the License, or (at your option) any later version. * * This library is distributed in the hope that it will be useful, but * WITHOUT ANY WARRANTY; without even the implied warranty of * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU * Lesser General Public License for more details. * * You should have received a copy of the GNU Lesser General Public * License along with this library; if not, write to the Free Software * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA * 02110-1301 USA */ #ifdef HAVE_CONFIG_H # include #endif #include #include #include "libguile/_scm.h" #include "libguile/alist.h" #include "libguile/chars.h" #include "libguile/dynwind.h" #include "libguile/eval.h" #include "libguile/fports.h" #include "libguile/libpath.h" #include "libguile/loader.h" #include "libguile/modules.h" #include "libguile/read.h" #include "libguile/srfi-13.h" #include "libguile/strings.h" #include "libguile/throw.h" #include "libguile/validate.h" #include "libguile/load.h" #include "libguile/fluids.h" #include "libguile/vm.h" /* for load-compiled/vm */ #include #include #include #ifdef HAVE_PWD_H #include #endif /* HAVE_PWD_H */ #ifndef R_OK #define R_OK 4 #endif #include /* Loading a file, given an absolute filename. */ /* Hook to run when we load a file, perhaps to announce the fact somewhere. Applied to the full name of the file. */ static SCM *scm_loc_load_hook; /* The current reader (a fluid). */ static SCM the_reader = SCM_BOOL_F; SCM_DEFINE (scm_primitive_load, "primitive-load", 1, 0, 0, (SCM filename), "Load the file named @var{filename} and evaluate its contents in\n" "the top-level environment. The load paths are not searched;\n" "@var{filename} must either be a full pathname or be a pathname\n" "relative to the current directory. If the variable\n" "@code{%load-hook} is defined, it should be bound to a procedure\n" "that will be called before any code is loaded. See the\n" "documentation for @code{%load-hook} later in this section.") #define FUNC_NAME s_scm_primitive_load { SCM hook = *scm_loc_load_hook; SCM ret = SCM_UNSPECIFIED; SCM_VALIDATE_STRING (1, filename); if (scm_is_true (hook) && scm_is_false (scm_procedure_p (hook))) SCM_MISC_ERROR ("value of %load-hook is neither a procedure nor #f", SCM_EOL); if (!scm_is_false (hook)) scm_call_1 (hook, filename); { SCM port; port = scm_open_file_with_encoding (filename, scm_from_latin1_string ("r"), SCM_BOOL_T, /* guess_encoding */ scm_from_latin1_string ("UTF-8")); scm_dynwind_begin (SCM_F_DYNWIND_REWINDABLE); scm_i_dynwind_current_load_port (port); while (1) { SCM reader, form; /* Lookup and use the current reader to read the next expression. */ reader = scm_fluid_ref (the_reader); if (scm_is_false (reader)) form = scm_read (port); else form = scm_call_1 (reader, port); if (SCM_EOF_OBJECT_P (form)) break; ret = scm_primitive_eval_x (form); } scm_dynwind_end (); scm_close_port (port); } return ret; } #undef FUNC_NAME SCM scm_c_primitive_load (const char *filename) { return scm_primitive_load (scm_from_locale_string (filename)); } /* Builtin path to scheme library files. */ #ifdef SCM_PKGDATA_DIR SCM_DEFINE (scm_sys_package_data_dir, "%package-data-dir", 0, 0, 0, (), "Return the name of the directory where Scheme packages, modules and\n" "libraries are kept. On most Unix systems, this will be\n" "@samp{/usr/local/share/guile}.") #define FUNC_NAME s_scm_sys_package_data_dir { return scm_from_locale_string (SCM_PKGDATA_DIR); } #undef FUNC_NAME #endif /* SCM_PKGDATA_DIR */ #ifdef SCM_LIBRARY_DIR SCM_DEFINE (scm_sys_library_dir, "%library-dir", 0,0,0, (), "Return the directory where the Guile Scheme library files are installed.\n" "E.g., may return \"/usr/share/guile/1.3.5\".") #define FUNC_NAME s_scm_sys_library_dir { return scm_from_locale_string (SCM_LIBRARY_DIR); } #undef FUNC_NAME #endif /* SCM_LIBRARY_DIR */ #ifdef SCM_SITE_DIR SCM_DEFINE (scm_sys_site_dir, "%site-dir", 0,0,0, (), "Return the directory where users should install Scheme code for use\n" "with this version of Guile.\n\n" "E.g., may return \"/usr/share/guile/site/" SCM_EFFECTIVE_VERSION "\".") #define FUNC_NAME s_scm_sys_site_dir { return scm_from_locale_string (SCM_SITE_DIR); } #undef FUNC_NAME #endif /* SCM_SITE_DIR */ #ifdef SCM_GLOBAL_SITE_DIR SCM_DEFINE (scm_sys_global_site_dir, "%global-site-dir", 0,0,0, (), "Return the directory where users should install Scheme code for use\n" "with all versions of Guile.\n\n" "E.g., may return \"/usr/share/guile/site\".") #define FUNC_NAME s_scm_sys_global_site_dir { return scm_from_locale_string (SCM_GLOBAL_SITE_DIR); } #undef FUNC_NAME #endif /* SCM_GLOBAL_SITE_DIR */ #ifdef SCM_SITE_CCACHE_DIR SCM_DEFINE (scm_sys_site_ccache_dir, "%site-ccache-dir", 0,0,0, (), "Return the directory where users should install compiled\n" "@code{.go} files for use with this version of Guile.\n\n" "E.g., may return \"/usr/lib/guile/" SCM_EFFECTIVE_VERSION "/site-ccache\".") #define FUNC_NAME s_scm_sys_site_ccache_dir { return scm_from_locale_string (SCM_SITE_CCACHE_DIR); } #undef FUNC_NAME #endif /* SCM_SITE_CCACHE_DIR */ /* Initializing the load path, and searching it. */ /* List of names of directories we search for files to load. */ static SCM *scm_loc_load_path; /* List of extensions we try adding to the filenames. */ static SCM *scm_loc_load_extensions; /* Like %load-path and %load-extensions, but for compiled files. */ static SCM *scm_loc_load_compiled_path; static SCM *scm_loc_load_compiled_extensions; /* Whether we should try to auto-compile. */ static SCM *scm_loc_load_should_auto_compile; /* Whether to treat all auto-compiled files as stale. */ static SCM *scm_loc_fresh_auto_compile; /* The fallback path for auto-compilation */ static SCM *scm_loc_compile_fallback_path; /* Ellipsis: "..." */ static SCM scm_ellipsis; SCM_DEFINE (scm_parse_path, "parse-path", 1, 1, 0, (SCM path, SCM tail), "Parse @var{path}, which is expected to be a colon-separated\n" "string, into a list and return the resulting list with\n" "@var{tail} appended. If @var{path} is @code{#f}, @var{tail}\n" "is returned.") #define FUNC_NAME s_scm_parse_path { #ifdef __MINGW32__ SCM sep = SCM_MAKE_CHAR (';'); #else SCM sep = SCM_MAKE_CHAR (':'); #endif if (SCM_UNBNDP (tail)) tail = SCM_EOL; return (scm_is_false (path) ? tail : scm_append_x (scm_list_2 (scm_string_split (path, sep), tail))); } #undef FUNC_NAME SCM_DEFINE (scm_parse_path_with_ellipsis, "parse-path-with-ellipsis", 2, 0, 0, (SCM path, SCM base), "Parse @var{path}, which is expected to be a colon-separated\n" "string, into a list and return the resulting list with\n" "@var{base} (a list) spliced in place of the @code{...} path\n" "component, if present, or else @var{base} is added to the end.\n" "If @var{path} is @code{#f}, @var{base} is returned.") #define FUNC_NAME s_scm_parse_path_with_ellipsis { SCM lst = scm_parse_path (path, SCM_EOL); SCM walk = lst; SCM *prev = &lst; while (!scm_is_null (walk) && scm_is_false (scm_equal_p (scm_car (walk), scm_ellipsis))) { prev = SCM_CDRLOC (walk); walk = *prev; } *prev = scm_is_null (walk) ? base : scm_append (scm_list_2 (base, scm_cdr (walk))); return lst; } #undef FUNC_NAME /* On Posix hosts, just return PATH unaltered. On Windows, destructively replace all backslashes in PATH with Unix-style forward slashes, so that Scheme code always gets d:/foo/bar style file names. This avoids multiple subtle problems with comparing file names as strings, and with redirections in /bin/sh command lines. Note that, if PATH is result of a call to 'getenv', this destructively modifies the environment variables, so both scm_getenv and subprocesses will afterwards see the values with forward slashes. That is OK as long as applied to Guile-specific environment variables, since having scm_getenv return the same value as used by the callers of this function is good for consistency and file-name comparison. Avoid using this function on values returned by 'getenv' for general-purpose environment variables; instead, make a copy of the value and work on that. */ SCM_INTERNAL char * scm_i_mirror_backslashes (char *path) { #ifdef __MINGW32__ if (path) { char *p = path; while (*p) { if (*p == '\\') *p = '/'; p++; } } #endif return path; } /* Initialize the global variable %load-path, given the value of the SCM_SITE_DIR and SCM_LIBRARY_DIR preprocessor symbols and the GUILE_LOAD_PATH environment variable. */ void scm_init_load_path () { char *env; SCM path = SCM_EOL; SCM cpath = SCM_EOL; #ifdef SCM_LIBRARY_DIR env = scm_i_mirror_backslashes (getenv ("GUILE_SYSTEM_PATH")); if (env && strcmp (env, "") == 0) /* special-case interpret system-path=="" as meaning no system path instead of '("") */ ; else if (env) path = scm_parse_path (scm_from_locale_string (env), path); else path = scm_list_4 (scm_from_locale_string (SCM_LIBRARY_DIR), scm_from_locale_string (SCM_SITE_DIR), scm_from_locale_string (SCM_GLOBAL_SITE_DIR), scm_from_locale_string (SCM_PKGDATA_DIR)); env = scm_i_mirror_backslashes (getenv ("GUILE_SYSTEM_COMPILED_PATH")); if (env && strcmp (env, "") == 0) /* like above */ ; else if (env) cpath = scm_parse_path (scm_from_locale_string (env), cpath); else { cpath = scm_list_2 (scm_from_locale_string (SCM_CCACHE_DIR), scm_from_locale_string (SCM_SITE_CCACHE_DIR)); } #endif /* SCM_LIBRARY_DIR */ { char cachedir[1024]; char *e; #ifdef HAVE_GETPWENT struct passwd *pwd; #endif #define FALLBACK_DIR \ "guile/ccache/" SCM_EFFECTIVE_VERSION "-" SCM_OBJCODE_MACHINE_VERSION_STRING if ((e = getenv ("XDG_CACHE_HOME"))) snprintf (cachedir, sizeof(cachedir), "%s/" FALLBACK_DIR, e); else if ((e = getenv ("HOME"))) snprintf (cachedir, sizeof(cachedir), "%s/.cache/" FALLBACK_DIR, e); #ifdef HAVE_GETPWENT else if ((pwd = getpwuid (getuid ())) && pwd->pw_dir) snprintf (cachedir, sizeof(cachedir), "%s/.cache/" FALLBACK_DIR, pwd->pw_dir); #endif /* HAVE_GETPWENT */ #ifdef __MINGW32__ else if ((e = getenv ("LOCALAPPDATA"))) snprintf (cachedir, sizeof (cachedir), "%s/.cache/" FALLBACK_DIR, e); else if ((e = getenv ("APPDATA"))) snprintf (cachedir, sizeof (cachedir), "%s/.cache/" FALLBACK_DIR, e); #endif /* __MINGW32__ */ else cachedir[0] = 0; if (cachedir[0]) { scm_i_mirror_backslashes (cachedir); *scm_loc_compile_fallback_path = scm_from_locale_string (cachedir); } } env = scm_i_mirror_backslashes (getenv ("GUILE_LOAD_PATH")); if (env) path = scm_parse_path_with_ellipsis (scm_from_locale_string (env), path); env = scm_i_mirror_backslashes (getenv ("GUILE_LOAD_COMPILED_PATH")); if (env) cpath = scm_parse_path_with_ellipsis (scm_from_locale_string (env), cpath); *scm_loc_load_path = path; *scm_loc_load_compiled_path = cpath; } SCM scm_listofnullstr; /* Utility functions for assembling C strings in a buffer. */ struct stringbuf { char *buf, *ptr; size_t buf_len; }; static void stringbuf_grow (struct stringbuf *buf) { size_t ptroff, prev_len; void *prev_buf = buf->buf; prev_len = buf->buf_len; ptroff = buf->ptr - buf->buf; buf->buf_len *= 2; buf->buf = scm_gc_malloc_pointerless (buf->buf_len, "search-path"); memcpy (buf->buf, prev_buf, prev_len); buf->ptr = buf->buf + ptroff; } static void stringbuf_cat_locale_string (struct stringbuf *buf, SCM str) { size_t max_len = buf->buf_len - (buf->ptr - buf->buf) - 1; size_t len = scm_to_locale_stringbuf (str, buf->ptr, max_len); if (len > max_len) { /* buffer is too small, double its size and try again. */ stringbuf_grow (buf); stringbuf_cat_locale_string (buf, str); } else { /* string fits, terminate it and check for embedded '\0'. */ buf->ptr[len] = '\0'; if (strlen (buf->ptr) != len) scm_misc_error (NULL, "string contains #\\nul character: ~S", scm_list_1 (str)); buf->ptr += len; } } static void stringbuf_cat (struct stringbuf *buf, char *str) { size_t max_len = buf->buf_len - (buf->ptr - buf->buf) - 1; size_t len = strlen (str); if (len > max_len) { /* buffer is too small, double its size and try again. */ stringbuf_grow (buf); stringbuf_cat (buf, str); } else { /* string fits, copy it into buffer. */ strcpy (buf->ptr, str); buf->ptr += len; } } /* Return non-zero if STR is suffixed by a dot followed by one of EXTENSIONS. */ static int string_has_an_ext (SCM str, SCM extensions) { for (; !scm_is_null (extensions); extensions = SCM_CDR (extensions)) { SCM extension; extension = SCM_CAR (extensions); if (scm_is_true (scm_string_suffix_p (extension, str, SCM_UNDEFINED, SCM_UNDEFINED, SCM_UNDEFINED, SCM_UNDEFINED))) return 1; } return 0; } /* Defined as "/" for Unix and Windows alike, so that file names constructed by the functions in this module wind up with Unix-style forward slashes as directory separators. */ #define FILE_NAME_SEPARATOR_STRING "/" static int is_file_name_separator (SCM c) { if (scm_is_eq (c, SCM_MAKE_CHAR ('/'))) return 1; #ifdef __MINGW32__ if (scm_is_eq (c, SCM_MAKE_CHAR ('\\'))) return 1; #endif return 0; } static int is_drive_letter (SCM c) { #ifdef __MINGW32__ if (SCM_CHAR (c) >= 'a' && SCM_CHAR (c) <= 'z') return 1; else if (SCM_CHAR (c) >= 'A' && SCM_CHAR (c) <= 'Z') return 1; #endif return 0; } static int is_absolute_file_name (SCM filename) { size_t filename_len = scm_c_string_length (filename); if (filename_len >= 1 && is_file_name_separator (scm_c_string_ref (filename, 0)) #ifdef __MINGW32__ /* On Windows, one initial separator indicates a drive-relative path. Two separators indicate a Universal Naming Convention (UNC) path. UNC paths are always absolute. */ && filename_len >= 2 && is_file_name_separator (scm_c_string_ref (filename, 1)) #endif ) return 1; if (filename_len >= 3 && is_drive_letter (scm_c_string_ref (filename, 0)) && scm_is_eq (scm_c_string_ref (filename, 1), SCM_MAKE_CHAR (':')) && is_file_name_separator (scm_c_string_ref (filename, 2))) return 1; return 0; } /* Return true if COMPILED_FILENAME is newer than source file FULL_FILENAME, false otherwise. */ static int compiled_is_fresh (SCM full_filename, SCM compiled_filename, struct stat *stat_source, struct stat *stat_compiled) { int compiled_is_newer; struct timespec source_mtime, compiled_mtime; source_mtime = get_stat_mtime (stat_source); compiled_mtime = get_stat_mtime (stat_compiled); if (source_mtime.tv_sec < compiled_mtime.tv_sec || (source_mtime.tv_sec == compiled_mtime.tv_sec && source_mtime.tv_nsec <= compiled_mtime.tv_nsec)) compiled_is_newer = 1; else { compiled_is_newer = 0; scm_puts (";;; note: source file ", scm_current_warning_port ()); scm_display (full_filename, scm_current_warning_port ()); scm_puts ("\n;;; newer than compiled ", scm_current_warning_port ()); scm_display (compiled_filename, scm_current_warning_port ()); scm_puts ("\n", scm_current_warning_port ()); } return compiled_is_newer; } static SCM do_load_thunk_from_file (void *data) { return scm_load_thunk_from_file (SCM_PACK_POINTER (data)); } static SCM load_thunk_from_file_catch_handler (void *data, SCM tag, SCM throw_args) { SCM filename = SCM_PACK_POINTER (data); SCM oport, lines; oport = scm_open_output_string (); scm_print_exception (oport, SCM_BOOL_F, tag, throw_args); scm_puts (";;; WARNING: loading compiled file ", scm_current_warning_port ()); scm_display (filename, scm_current_warning_port ()); scm_puts (" failed:\n", scm_current_warning_port ()); lines = scm_string_split (scm_get_output_string (oport), SCM_MAKE_CHAR ('\n')); for (; scm_is_pair (lines); lines = scm_cdr (lines)) if (scm_c_string_length (scm_car (lines))) { scm_puts (";;; ", scm_current_warning_port ()); scm_display (scm_car (lines), scm_current_warning_port ()); scm_newline (scm_current_warning_port ()); } scm_close_port (oport); return SCM_BOOL_F; } static SCM try_load_thunk_from_file (SCM filename) { return scm_c_catch (SCM_BOOL_T, do_load_thunk_from_file, SCM_UNPACK_POINTER (filename), load_thunk_from_file_catch_handler, SCM_UNPACK_POINTER (filename), NULL, NULL); } /* Search the %load-compiled-path for a directory containing a file named FILENAME. The file must be readable, and not a directory. If we don't find one, return #f. If we do fine one, treat it as a compiled file and try to load it as a thunk. If that fails, continue looking in the path. If given, EXTENSIONS is a list of strings; for each directory in PATH, we search for FILENAME concatenated with each EXTENSION. If SOURCE_FILE_NAME is true, then only try to load compiled files that are newer than SOURCE_STAT_BUF. If they are older, otherwise issuing a warning if we see a stale file earlier in the path, setting *FOUND_STALE_FILE to 1. */ static SCM load_thunk_from_path (SCM filename, SCM source_file_name, struct stat *source_stat_buf, int *found_stale_file) { struct stringbuf buf; struct stat stat_buf; char *filename_chars; size_t filename_len; SCM path, extensions; SCM result = SCM_BOOL_F; char initial_buffer[256]; path = *scm_loc_load_compiled_path; if (scm_ilength (path) < 0) scm_misc_error ("%search-path", "path is not a proper list: ~a", scm_list_1 (path)); extensions = *scm_loc_load_compiled_extensions; if (scm_ilength (extensions) < 0) scm_misc_error ("%search-path", "bad extensions list: ~a", scm_list_1 (extensions)); scm_dynwind_begin (0); filename_chars = scm_to_locale_string (filename); filename_len = strlen (filename_chars); scm_dynwind_free (filename_chars); /* If FILENAME is absolute and is still valid, return it unchanged. */ if (is_absolute_file_name (filename)) { if (string_has_an_ext (filename, extensions) && stat (filename_chars, &stat_buf) == 0 && !(stat_buf.st_mode & S_IFDIR)) result = scm_load_thunk_from_file (filename); goto end; } /* If FILENAME has an extension, don't try to add EXTENSIONS to it. */ { char *endp; for (endp = filename_chars + filename_len - 1; endp >= filename_chars; endp--) { if (*endp == '.') { if (!string_has_an_ext (filename, extensions)) { /* This filename has an extension, but not one of the right ones... */ goto end; } /* This filename already has an extension, so cancel the list of extensions. */ extensions = SCM_EOL; break; } else if (is_file_name_separator (SCM_MAKE_CHAR (*endp))) /* This filename has no extension, so keep the current list of extensions. */ break; } } /* This simplifies the loop below a bit. */ if (scm_is_null (extensions)) extensions = scm_listofnullstr; buf.buf_len = sizeof initial_buffer; buf.buf = initial_buffer; /* Try every path element. */ for (; scm_is_pair (path); path = SCM_CDR (path)) { SCM dir = SCM_CAR (path); SCM exts; size_t sans_ext_len; buf.ptr = buf.buf; stringbuf_cat_locale_string (&buf, dir); /* Concatenate the path name and the filename. */ if (buf.ptr > buf.buf && !is_file_name_separator (SCM_MAKE_CHAR (buf.ptr[-1]))) stringbuf_cat (&buf, FILE_NAME_SEPARATOR_STRING); stringbuf_cat (&buf, filename_chars); sans_ext_len = buf.ptr - buf.buf; /* Try every extension. */ for (exts = extensions; scm_is_pair (exts); exts = SCM_CDR (exts)) { SCM ext = SCM_CAR (exts); buf.ptr = buf.buf + sans_ext_len; stringbuf_cat_locale_string (&buf, ext); /* If the file exists at all, we should return it. If the file is inaccessible, then that's an error. */ if (stat (buf.buf, &stat_buf) == 0 && ! (stat_buf.st_mode & S_IFDIR)) { SCM found = scm_from_locale_string (scm_i_mirror_backslashes (buf.buf)); if (scm_is_true (source_file_name) && !compiled_is_fresh (source_file_name, found, source_stat_buf, &stat_buf)) { if (found_stale_file) *found_stale_file = 1; continue; } result = try_load_thunk_from_file (found); if (scm_is_false (result)) /* Already warned. */ continue; if (found_stale_file && *found_stale_file) { scm_puts (";;; found fresh compiled file at ", scm_current_warning_port ()); scm_display (found, scm_current_warning_port ()); scm_newline (scm_current_warning_port ()); } goto end; } } if (!SCM_NULL_OR_NIL_P (exts)) scm_wrong_type_arg_msg (NULL, 0, extensions, "proper list"); } if (!SCM_NULL_OR_NIL_P (path)) scm_wrong_type_arg_msg (NULL, 0, path, "proper list"); end: scm_dynwind_end (); return result; } /* Search PATH for a directory containing a file named FILENAME. The file must be readable, and not a directory. If we find one, return its full pathname; otherwise, return #f. If FILENAME is absolute, return it unchanged. We also fill *stat_buf corresponding to the returned pathname. If given, EXTENSIONS is a list of strings; for each directory in PATH, we search for FILENAME concatenated with each EXTENSION. */ static SCM search_path (SCM path, SCM filename, SCM extensions, SCM require_exts, struct stat *stat_buf) { struct stringbuf buf; char *filename_chars; size_t filename_len; SCM result = SCM_BOOL_F; char initial_buffer[256]; if (scm_ilength (path) < 0) scm_misc_error ("%search-path", "path is not a proper list: ~a", scm_list_1 (path)); if (scm_ilength (extensions) < 0) scm_misc_error ("%search-path", "bad extensions list: ~a", scm_list_1 (extensions)); scm_dynwind_begin (0); filename_chars = scm_to_locale_string (filename); filename_len = strlen (filename_chars); scm_dynwind_free (filename_chars); /* If FILENAME is absolute and is still valid, return it unchanged. */ if (is_absolute_file_name (filename)) { if ((scm_is_false (require_exts) || string_has_an_ext (filename, extensions)) && stat (filename_chars, stat_buf) == 0 && !(stat_buf->st_mode & S_IFDIR)) result = filename; goto end; } /* If FILENAME has an extension, don't try to add EXTENSIONS to it. */ { char *endp; for (endp = filename_chars + filename_len - 1; endp >= filename_chars; endp--) { if (*endp == '.') { if (scm_is_true (require_exts) && !string_has_an_ext (filename, extensions)) { /* This filename has an extension, but not one of the right ones... */ goto end; } /* This filename already has an extension, so cancel the list of extensions. */ extensions = SCM_EOL; break; } else if (is_file_name_separator (SCM_MAKE_CHAR (*endp))) /* This filename has no extension, so keep the current list of extensions. */ break; } } /* This simplifies the loop below a bit. */ if (scm_is_null (extensions)) extensions = scm_listofnullstr; buf.buf_len = sizeof initial_buffer; buf.buf = initial_buffer; /* Try every path element. */ for (; scm_is_pair (path); path = SCM_CDR (path)) { SCM dir = SCM_CAR (path); SCM exts; size_t sans_ext_len; buf.ptr = buf.buf; stringbuf_cat_locale_string (&buf, dir); /* Concatenate the path name and the filename. */ if (buf.ptr > buf.buf && !is_file_name_separator (SCM_MAKE_CHAR (buf.ptr[-1]))) stringbuf_cat (&buf, FILE_NAME_SEPARATOR_STRING); stringbuf_cat (&buf, filename_chars); sans_ext_len = buf.ptr - buf.buf; /* Try every extension. */ for (exts = extensions; scm_is_pair (exts); exts = SCM_CDR (exts)) { SCM ext = SCM_CAR (exts); buf.ptr = buf.buf + sans_ext_len; stringbuf_cat_locale_string (&buf, ext); /* If the file exists at all, we should return it. If the file is inaccessible, then that's an error. */ if (stat (buf.buf, stat_buf) == 0 && ! (stat_buf->st_mode & S_IFDIR)) { result = scm_from_locale_string (scm_i_mirror_backslashes (buf.buf)); goto end; } } if (!SCM_NULL_OR_NIL_P (exts)) scm_wrong_type_arg_msg (NULL, 0, extensions, "proper list"); } if (!SCM_NULL_OR_NIL_P (path)) scm_wrong_type_arg_msg (NULL, 0, path, "proper list"); end: scm_dynwind_end (); return result; } SCM_DEFINE (scm_search_path, "search-path", 2, 0, 1, (SCM path, SCM filename, SCM rest), "Search @var{path} for a directory containing a file named\n" "@var{filename}. The file must be readable, and not a directory.\n" "If we find one, return its full filename; otherwise, return\n" "@code{#f}. If @var{filename} is absolute, return it unchanged.\n" "If given, @var{rest} is a list of extension strings; for each\n" "directory in @var{path}, we search for @var{filename}\n" "concatenated with each extension.") #define FUNC_NAME s_scm_search_path { SCM extensions, require_exts; struct stat stat_buf; if (SCM_UNBNDP (rest) || scm_is_null (rest)) { /* Called either by Scheme code that didn't provide the optional arguments, or C code that used the Guile 1.8 signature (2 required, 1 optional arg) and passed '() or nothing as the EXTENSIONS argument. */ extensions = SCM_EOL; require_exts = SCM_UNDEFINED; } else { if (scm_is_null (SCM_CAR (rest)) || scm_is_pair (SCM_CAR (rest))) { /* Called by Scheme code written for 1.9. */ extensions = SCM_CAR (rest); if (scm_is_null (SCM_CDR (rest))) require_exts = SCM_UNDEFINED; else { require_exts = SCM_CADR (rest); if (SCM_UNLIKELY (!scm_is_null (SCM_CDDR (rest)))) scm_wrong_num_args (scm_from_locale_string (FUNC_NAME)); } } else { /* Called by C code that uses the 1.8 signature, i.e., which expects the 3rd argument to be EXTENSIONS. */ extensions = rest; require_exts = SCM_UNDEFINED; } } if (SCM_UNBNDP (extensions)) extensions = SCM_EOL; if (SCM_UNBNDP (require_exts)) require_exts = SCM_BOOL_F; return search_path (path, filename, extensions, require_exts, &stat_buf); } #undef FUNC_NAME /* Search %load-path for a directory containing a file named FILENAME. The file must be readable, and not a directory. If we find one, return its full filename; otherwise, return #f. If FILENAME is absolute, return it unchanged. */ SCM_DEFINE (scm_sys_search_load_path, "%search-load-path", 1, 0, 0, (SCM filename), "Search @var{%load-path} for the file named @var{filename},\n" "which must be readable by the current user. If @var{filename}\n" "is found in the list of paths to search or is an absolute\n" "pathname, return its full pathname. Otherwise, return\n" "@code{#f}. Filenames may have any of the optional extensions\n" "in the @code{%load-extensions} list; @code{%search-load-path}\n" "will try each extension automatically.") #define FUNC_NAME s_scm_sys_search_load_path { struct stat stat_buf; SCM_VALIDATE_STRING (1, filename); return search_path (*scm_loc_load_path, filename, *scm_loc_load_extensions, SCM_BOOL_F, &stat_buf); } #undef FUNC_NAME SCM_KEYWORD (kw_env, "env"); SCM_KEYWORD (kw_opts, "opts"); SCM_SYMBOL (sym_compile_file, "compile-file"); SCM_SYMBOL (sym_auto_compilation_options, "%auto-compilation-options"); static SCM do_try_auto_compile (void *data) { SCM source = SCM_PACK_POINTER (data); SCM comp_mod, compile_file; scm_puts (";;; compiling ", scm_current_warning_port ()); scm_display (source, scm_current_warning_port ()); scm_newline (scm_current_warning_port ()); comp_mod = scm_c_resolve_module ("system base compile"); compile_file = scm_module_variable (comp_mod, sym_compile_file); if (scm_is_true (compile_file)) { /* Auto-compile in the context of the current module. */ SCM res, opts; SCM args[5]; opts = scm_module_variable (scm_the_root_module (), sym_auto_compilation_options); if (SCM_VARIABLEP (opts)) opts = SCM_VARIABLE_REF (opts); else opts = SCM_EOL; args[0] = source; args[1] = kw_opts; args[2] = opts; args[3] = kw_env; args[4] = scm_current_module (); /* Assume `*current-warning-prefix*' has an appropriate value. */ res = scm_call_n (scm_variable_ref (compile_file), args, 5); scm_puts (";;; compiled ", scm_current_warning_port ()); scm_display (res, scm_current_warning_port ()); scm_newline (scm_current_warning_port ()); return res; } else { scm_puts (";;; it seems ", scm_current_warning_port ()); scm_display (source, scm_current_warning_port ()); scm_puts ("\n;;; is part of the compiler; skipping auto-compilation\n", scm_current_warning_port ()); return SCM_BOOL_F; } } static SCM auto_compile_catch_handler (void *data, SCM tag, SCM throw_args) { SCM source = SCM_PACK_POINTER (data); SCM oport, lines; oport = scm_open_output_string (); scm_print_exception (oport, SCM_BOOL_F, tag, throw_args); scm_puts (";;; WARNING: compilation of ", scm_current_warning_port ()); scm_display (source, scm_current_warning_port ()); scm_puts (" failed:\n", scm_current_warning_port ()); lines = scm_string_split (scm_get_output_string (oport), SCM_MAKE_CHAR ('\n')); for (; scm_is_pair (lines); lines = scm_cdr (lines)) if (scm_c_string_length (scm_car (lines))) { scm_puts (";;; ", scm_current_warning_port ()); scm_display (scm_car (lines), scm_current_warning_port ()); scm_newline (scm_current_warning_port ()); } scm_close_port (oport); return SCM_BOOL_F; } SCM_DEFINE (scm_sys_warn_auto_compilation_enabled, "%warn-auto-compilation-enabled", 0, 0, 0, (void), "") #define FUNC_NAME s_scm_sys_warn_auto_compilation_enabled { static int message_shown = 0; if (!message_shown) { scm_puts (";;; note: auto-compilation is enabled, set GUILE_AUTO_COMPILE=0\n" ";;; or pass the --no-auto-compile argument to disable.\n", scm_current_warning_port ()); message_shown = 1; } return SCM_UNSPECIFIED; } #undef FUNC_NAME static SCM scm_try_auto_compile (SCM source) { if (scm_is_false (*scm_loc_load_should_auto_compile)) return SCM_BOOL_F; scm_sys_warn_auto_compilation_enabled (); return scm_c_catch (SCM_BOOL_T, do_try_auto_compile, SCM_UNPACK_POINTER (source), auto_compile_catch_handler, SCM_UNPACK_POINTER (source), NULL, NULL); } /* The auto-compilation code will residualize a .go file in the cache dir: by default, $HOME/.cache/guile/2.0/ccache/PATH.go. This function determines the PATH to use as a key into the compilation cache. See also (system base compile):compiled-file-name. */ static SCM canonical_suffix (SCM fname) { SCM canon; /* CANON should be absolute. */ canon = scm_canonicalize_path (fname); #ifdef __MINGW32__ { size_t len = scm_c_string_length (canon); /* On Windows, an absolute file name that doesn't start with a separator starts with a drive component. Transform the drive component to a file name element: c:\foo -> \c\foo. */ if (len >= 2 && is_absolute_file_name (canon) && !is_file_name_separator (scm_c_string_ref (canon, 0))) return scm_string_append (scm_list_3 (scm_from_latin1_string (FILE_NAME_SEPARATOR_STRING), scm_c_substring (canon, 0, 1), scm_c_substring (canon, 2, len))); } #endif return canon; } SCM_DEFINE (scm_primitive_load_path, "primitive-load-path", 0, 0, 1, (SCM args), "Search @var{%load-path} for the file named @var{filename} and\n" "load it into the top-level environment.\n\n" "If @var{filename} is a relative pathname and is not found in\n" "the list of search paths, one of three things may happen,\n" "depending on the optional second argument,\n" "@var{exception_on_not_found}. If it is @code{#f}, @code{#f}\n" "will be returned. If it is a procedure, it will be called\n" "with no arguments. Otherwise an error is signalled.") #define FUNC_NAME s_scm_primitive_load_path { SCM filename, exception_on_not_found; SCM full_filename, compiled_thunk; SCM hook = *scm_loc_load_hook; struct stat stat_source, stat_compiled; int found_stale_compiled_file = 0; if (scm_is_true (hook) && scm_is_false (scm_procedure_p (hook))) SCM_MISC_ERROR ("value of %load-hook is neither a procedure nor #f", SCM_EOL); if (scm_is_string (args)) { /* C code written for 1.8 and earlier expects this function to take a single argument (the file name). */ filename = args; exception_on_not_found = SCM_UNDEFINED; } else { /* Starting from 1.9, this function takes 1 required and 1 optional argument. */ long len; SCM_VALIDATE_LIST_COPYLEN (SCM_ARG1, args, len); if (len < 1 || len > 2) scm_error_num_args_subr (FUNC_NAME); filename = SCM_CAR (args); SCM_VALIDATE_STRING (SCM_ARG1, filename); exception_on_not_found = len > 1 ? SCM_CADR (args) : SCM_UNDEFINED; } if (SCM_UNBNDP (exception_on_not_found)) exception_on_not_found = SCM_BOOL_T; full_filename = search_path (*scm_loc_load_path, filename, *scm_loc_load_extensions, SCM_BOOL_F, &stat_source); compiled_thunk = load_thunk_from_path (filename, full_filename, &stat_source, &found_stale_compiled_file); if (scm_is_false (compiled_thunk) && scm_is_true (full_filename) && scm_is_true (*scm_loc_compile_fallback_path) && scm_is_false (*scm_loc_fresh_auto_compile) && scm_is_pair (*scm_loc_load_compiled_extensions) && scm_is_string (scm_car (*scm_loc_load_compiled_extensions))) { SCM fallback; char *fallback_chars; fallback = scm_string_append (scm_list_3 (*scm_loc_compile_fallback_path, canonical_suffix (full_filename), scm_car (*scm_loc_load_compiled_extensions))); fallback_chars = scm_to_locale_string (fallback); if (stat (fallback_chars, &stat_compiled) == 0 && compiled_is_fresh (full_filename, fallback, &stat_source, &stat_compiled)) { if (found_stale_compiled_file) { scm_puts (";;; found fresh local cache at ", scm_current_warning_port ()); scm_display (fallback, scm_current_warning_port ()); scm_newline (scm_current_warning_port ()); } compiled_thunk = try_load_thunk_from_file (fallback); } free (fallback_chars); } if (scm_is_false (full_filename) && scm_is_false (compiled_thunk)) { if (scm_is_true (scm_procedure_p (exception_on_not_found))) return scm_call_0 (exception_on_not_found); else if (scm_is_false (exception_on_not_found)) return SCM_BOOL_F; else SCM_MISC_ERROR ("Unable to find file ~S in load path", scm_list_1 (filename)); } if (!scm_is_false (hook)) scm_call_1 (hook, full_filename); if (scm_is_true (compiled_thunk)) return scm_call_0 (compiled_thunk); else { SCM freshly_compiled = scm_try_auto_compile (full_filename); if (scm_is_true (freshly_compiled)) return scm_call_0 (scm_load_thunk_from_file (freshly_compiled)); else return scm_primitive_load (full_filename); } } #undef FUNC_NAME SCM scm_c_primitive_load_path (const char *filename) { return scm_primitive_load_path (scm_from_locale_string (filename)); } void scm_init_eval_in_scheme (void) { SCM eval_scm, eval_thunk; struct stat stat_source; int found_stale_eval_go = 0; eval_scm = search_path (*scm_loc_load_path, scm_from_locale_string ("ice-9/eval.scm"), SCM_EOL, SCM_BOOL_F, &stat_source); eval_thunk = load_thunk_from_path (scm_from_locale_string ("ice-9/eval.go"), eval_scm, &stat_source, &found_stale_eval_go); if (scm_is_true (eval_thunk)) scm_call_0 (eval_thunk); else /* If we have no eval.go, we shouldn't load any compiled code at all because we can't guarantee that tail calls will work. */ *scm_loc_load_compiled_path = SCM_EOL; } /* Information about the build environment. */ SCM_VARIABLE_INIT (sys_host_type, "%host-type", scm_from_locale_string (HOST_TYPE)); /* Initialize the scheme variable %guile-build-info, based on data provided by the Makefile, via libpath.h. */ static void init_build_info () { static struct { char *name; char *value; } info[] = SCM_BUILD_INFO; SCM *loc = SCM_VARIABLE_LOC (scm_c_define ("%guile-build-info", SCM_EOL)); unsigned long i; for (i = 0; i < (sizeof (info) / sizeof (info[0])); i++) { SCM key = scm_from_utf8_symbol (info[i].name); SCM val = scm_from_locale_string (info[i].value); *loc = scm_acons (key, val, *loc); } #ifdef PACKAGE_PACKAGER *loc = scm_acons (scm_from_latin1_symbol ("packager"), scm_from_latin1_string (PACKAGE_PACKAGER), *loc); #endif #ifdef PACKAGE_PACKAGER_VERSION *loc = scm_acons (scm_from_latin1_symbol ("packager-version"), scm_from_latin1_string (PACKAGE_PACKAGER_VERSION), *loc); #endif #ifdef PACKAGE_PACKAGER_BUG_REPORTS *loc = scm_acons (scm_from_latin1_symbol ("packager-bug-reports"), scm_from_latin1_string (PACKAGE_PACKAGER_BUG_REPORTS), *loc); #endif } void scm_init_load () { scm_listofnullstr = scm_list_1 (scm_nullstr); scm_loc_load_path = SCM_VARIABLE_LOC (scm_c_define ("%load-path", SCM_EOL)); scm_loc_load_extensions = SCM_VARIABLE_LOC (scm_c_define ("%load-extensions", scm_list_2 (scm_from_locale_string (".scm"), scm_nullstr))); scm_loc_load_compiled_path = SCM_VARIABLE_LOC (scm_c_define ("%load-compiled-path", SCM_EOL)); scm_loc_load_compiled_extensions = SCM_VARIABLE_LOC (scm_c_define ("%load-compiled-extensions", scm_list_1 (scm_from_locale_string (".go")))); scm_loc_load_hook = SCM_VARIABLE_LOC (scm_c_define ("%load-hook", SCM_BOOL_F)); scm_loc_compile_fallback_path = SCM_VARIABLE_LOC (scm_c_define ("%compile-fallback-path", SCM_BOOL_F)); scm_loc_load_should_auto_compile = SCM_VARIABLE_LOC (scm_c_define ("%load-should-auto-compile", SCM_BOOL_F)); scm_loc_fresh_auto_compile = SCM_VARIABLE_LOC (scm_c_define ("%fresh-auto-compile", SCM_BOOL_F)); scm_ellipsis = scm_from_latin1_string ("..."); the_reader = scm_make_fluid_with_default (SCM_BOOL_F); scm_c_define("current-reader", the_reader); scm_c_define ("load-compiled", scm_c_make_gsubr ("load-compiled/vm", 1, 0, 0, scm_load_compiled_with_vm)); init_build_info (); #include "libguile/load.x" } void scm_init_load_should_auto_compile () { char *auto_compile = getenv ("GUILE_AUTO_COMPILE"); if (auto_compile && strcmp (auto_compile, "0") == 0) { *scm_loc_load_should_auto_compile = SCM_BOOL_F; *scm_loc_fresh_auto_compile = SCM_BOOL_F; } /* Allow "freshen" also. */ else if (auto_compile && strncmp (auto_compile, "fresh", 5) == 0) { *scm_loc_load_should_auto_compile = SCM_BOOL_T; *scm_loc_fresh_auto_compile = SCM_BOOL_T; } else { *scm_loc_load_should_auto_compile = SCM_BOOL_T; *scm_loc_fresh_auto_compile = SCM_BOOL_F; } } /* Local Variables: c-file-style: "gnu" End: */