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library.c
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library.c
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/*
Copyright (C) 2004, The Perl Foundation.
$Id$
=head1 NAME
src/library.c - Interface to Parrot's bytecode library
=head1 DESCRIPTION
This file contains a C function to access parrot's bytecode library functions.
=head2 Functions
=over 4
=cut
*/
#include "parrot/parrot.h"
#include "parrot/dynext.h"
#include <assert.h>
#include "library.str"
/*
=item C<void parrot_init_library_paths(Interp *)>
Create an array of StringArrays with library searchpaths and shared
extension used for loading various files at runtime. The created
structures looks like this:
lib_paths = [
[ "runtime/parrot/include", ... ], # paths for .include 'file'
[ "runtime/parrot/library", ... ], # paths for load_bytecode
[ "runtime/parrot/dynext", ... ], # paths for loadlib
[ ".so", ... ] # list of shared extensions
]
If the platform defines
#define PARROT_PLATFORM_LIB_PATH_INIT_HOOK the_init_hook
if will be called as a function with this prototype:
void the_init_hook(Interp*, PMC *lib_paths);
Platform code may add, delete, or replace search path entries as needed. See
also F<include/parrot/library.h> for C<enum_lib_paths>.
=cut
*/
void
parrot_init_library_paths(Interp *interpreter)
{
PMC *iglobals, *lib_paths, *paths;
STRING *entry;
iglobals = interpreter->iglobals;
/* create the lib_paths array */
lib_paths = pmc_new(interpreter, enum_class_FixedPMCArray);
VTABLE_set_integer_native(interpreter, lib_paths, PARROT_LIB_PATH_SIZE);
VTABLE_set_pmc_keyed_int(interpreter, iglobals,
IGLOBALS_LIB_PATHS, lib_paths);
/* each is an array of strings */
/* define include paths */
paths = pmc_new(interpreter, enum_class_ResizableStringArray);
VTABLE_set_pmc_keyed_int(interpreter, lib_paths,
PARROT_LIB_PATH_INCLUDE, paths);
entry = CONST_STRING(interpreter, "runtime/parrot/include/");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "runtime/parrot/");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "./");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "lib/parrot/include/");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "lib/parrot/");
VTABLE_push_string(interpreter, paths, entry);
/* define library paths */
paths = pmc_new(interpreter, enum_class_ResizableStringArray);
VTABLE_set_pmc_keyed_int(interpreter, lib_paths,
PARROT_LIB_PATH_LIBRARY, paths);
entry = CONST_STRING(interpreter, "runtime/parrot/library/");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "runtime/parrot/");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "./");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "lib/parrot/library/");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "lib/parrot/");
VTABLE_push_string(interpreter, paths, entry);
/* define dynext paths */
paths = pmc_new(interpreter, enum_class_ResizableStringArray);
VTABLE_set_pmc_keyed_int(interpreter, lib_paths,
PARROT_LIB_PATH_DYNEXT, paths);
entry = CONST_STRING(interpreter, "runtime/parrot/dynext/");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "");
VTABLE_push_string(interpreter, paths, entry);
entry = CONST_STRING(interpreter, "lib/parrot/dynext/");
VTABLE_push_string(interpreter, paths, entry);
/* shared exts */
paths = pmc_new(interpreter, enum_class_ResizableStringArray);
VTABLE_set_pmc_keyed_int(interpreter, lib_paths,
PARROT_LIB_DYN_EXTS, paths);
/* no CONST_STRING here - the c2str.pl preprocessor needs "real strs" */
entry = const_string(interpreter, PARROT_LOAD_EXT);
VTABLE_push_string(interpreter, paths, entry);
/* OS/X has .dylib and .bundle */
if (strcmp(PARROT_LOAD_EXT, PARROT_SHARE_EXT)) {
entry = const_string(interpreter, PARROT_SHARE_EXT);
VTABLE_push_string(interpreter, paths, entry);
}
#ifdef PARROT_PLATFORM_LIB_PATH_INIT_HOOK
PARROT_PLATFORM_LIB_PATH_INIT_HOOK(interpreter, lib_paths);
#endif
}
static PMC*
get_search_paths(Interp *interpreter, enum_lib_paths which)
{
PMC *iglobals, *lib_paths;
iglobals = interpreter->iglobals;
lib_paths = VTABLE_get_pmc_keyed_int(interpreter, iglobals,
IGLOBALS_LIB_PATHS);
return VTABLE_get_pmc_keyed_int(interpreter, lib_paths, which);
}
static int
is_abs_path(Interp* interpreter, STRING *file)
{
char *file_name;
file_name = file->strstart;
if (file->strlen <= 1)
return 0;
assert(file->encoding == Parrot_fixed_8_encoding_ptr ||
file->encoding == Parrot_utf8_encoding_ptr);
#ifdef WIN32
if (file_name[0] == '\\' || file_name[0] == '/' ||
(isalpha(file_name[0]) && file->strlen > 2 &&
(strncmp(file_name+1, ":\\", 2) == 0 ||
strncmp(file_name+1, ":/", 2) == 0)))
#else
if (file_name[0] == '/') /* XXX ../foo, ./bar */
#endif
{
return 1;
}
return 0;
}
/*
=item C<char* Parrot_locate_runtime_file(Interp *, const char *file_name,
enum_runtime_ft type)>
Locate the full path for C<file_name> and the given file type(s). If
successful, returns a C-string allocated with C<string_to_cstring> or
NULL otherwise.
=item C<STRING* Parrot_locate_runtime_file_str(Interp *, STRING *file_name,
enum_runtime_ft type)>
Like above but use and return STRINGs. If successful, the returned STRING
is 0-terminated so that C<result-E<gt>strstart> is usable as B<const char*>
c-string for C library functions like fopen(3).
This is the prefered API function.
The C<enum_runtime_ft type> is one or more of the types defined in
F<include/parrot/library.h>.
=cut
*/
STRING*
Parrot_locate_runtime_file_str(Interp *interpreter, STRING *file,
enum_runtime_ft type)
{
STRING *prefix, *path, *full_name, *slash, *nul;
INTVAL i, n;
PMC *paths;
/* if this is an absolute path return it as is */
if (is_abs_path(interpreter, file))
return file;
if (type & PARROT_RUNTIME_FT_DYNEXT)
paths = get_search_paths(interpreter, PARROT_LIB_PATH_DYNEXT);
else if (type & (PARROT_RUNTIME_FT_PBC | PARROT_RUNTIME_FT_SOURCE))
paths = get_search_paths(interpreter, PARROT_LIB_PATH_LIBRARY);
else
paths = get_search_paths(interpreter, PARROT_LIB_PATH_INCLUDE);
#ifdef WIN32
slash = CONST_STRING(interpreter, "\\");
#else
slash = CONST_STRING(interpreter, "/");
#endif
nul = string_from_const_cstring(interpreter, "\0", 1);
Parrot_get_runtime_prefix(interpreter, &prefix);
n = VTABLE_elements(interpreter, paths);
for (i = 0; i < n; ++i) {
path = VTABLE_get_string_keyed_int(interpreter, paths, i);
if (string_length(interpreter, prefix) &&
!is_abs_path(interpreter,path)) {
full_name = string_concat(interpreter, prefix, slash, 0);
full_name = string_append(interpreter, full_name, path, 0);
}
else
full_name = string_copy(interpreter, path);
/* make sure this path has a trailing slash before appending the file */
if ( string_index(interpreter, full_name, full_name->strlen - 1)
!= string_index(interpreter, slash, 0))
full_name = string_append(interpreter, full_name, slash, 0);
full_name = string_append(interpreter, full_name, file, 0);
/* TODO create a string API that just does that
* a lot of ICU lib functions also need 0-terminated strings
* the goal is just to have for sure an invisible 0 at end
*/
full_name = string_append(interpreter, full_name, nul, 0);
full_name->bufused--;
full_name->strlen--;
#ifdef WIN32
{
char *p;
assert(full_name->encoding == Parrot_fixed_8_encoding_ptr ||
full_name->encoding == Parrot_utf8_encoding_ptr);
while ( (p = strchr(full_name->strstart, '/')) )
*p = '\\';
}
#endif
if (Parrot_stat_info_intval(interpreter, full_name, STAT_EXISTS)) {
return full_name;
}
}
/* finally try as is */
full_name = string_append(interpreter, file, nul, 0);
full_name->bufused--;
full_name->strlen--;
#ifdef WIN32
{
char *p;
assert(full_name->encoding == Parrot_fixed_8_encoding_ptr ||
full_name->encoding == Parrot_utf8_encoding_ptr);
while ( (p = strchr(full_name->strstart, '/')) )
*p = '\\';
}
#endif
if (Parrot_stat_info_intval(interpreter, full_name, STAT_EXISTS)) {
return full_name;
}
return NULL;
}
char*
Parrot_locate_runtime_file(Interp *interpreter, const char *file_name,
enum_runtime_ft type)
{
STRING *file = string_from_cstring(interpreter, file_name, 0);
STRING *result = Parrot_locate_runtime_file_str(interpreter,
file, type);
/*
* XXX valgrind shows e.g.
* invalid read of size 8 inside a string of length 69
* at position 64
* it seems that dlopen accesses words beyond the string end
*
* see also the log at #37814
*/
return string_to_cstring(interpreter, result);
}
/*
=item C<const char* Parrot_get_runtime_prefix(Interp *, STRING **prefix_str)>
If C<prefix_str> is not NULL, set it to the prefix, else
return a malloced c-string for the runtime prefix.
=cut
*/
const char*
Parrot_get_runtime_prefix(Interp *interpreter, STRING **prefix_str)
{
STRING *s, *key;
PMC *config_hash;
int free_it;
char *env;
env = Parrot_getenv("PARROT_RUNTIME", &free_it);
if (env) {
if (prefix_str) {
*prefix_str = string_from_cstring(interpreter, env, 0);
if (free_it)
free(env);
return NULL;
}
if (!free_it)
env = strdup(env);
return env;
}
config_hash = VTABLE_get_pmc_keyed_int(interpreter, interpreter->iglobals,
(INTVAL) IGLOBALS_CONFIG_HASH);
key = CONST_STRING(interpreter, "prefix");
if (!VTABLE_elements(interpreter, config_hash)) {
const char *pwd = ".";
char *ret;
if (prefix_str) {
*prefix_str = const_string(interpreter, pwd);
return NULL;
}
ret = mem_sys_allocate(3);
strcpy(ret, pwd);
return ret;
}
s = VTABLE_get_string_keyed_str(interpreter, config_hash, key);
if (prefix_str) {
*prefix_str = s;
return NULL;
}
return string_to_cstring(interpreter, s);
}
/*
=item C<void Parrot_autoload_class(Interp *, STRING *class)>
Try to load a library that holds the PMC class.
XXX Check if this is still needed with HLL type mappings.
=cut
*/
void
Parrot_autoload_class(Interp *interpreter, STRING *class)
{
static const struct {
const char *prefix;
const char *lib;
} mappings[] = {
{ "Py", "python_group" },
{ "Tcl", "tcl_group" }
};
size_t i;
char *cclass;
cclass = string_to_cstring(interpreter, class);
for (i = 0; i < sizeof(mappings)/sizeof(mappings[0]); ++i) {
if (!memcmp(mappings[i].prefix, cclass, strlen(mappings[i].prefix))) {
STRING *slib = const_string(interpreter, mappings[i].lib);
Parrot_load_lib(interpreter, slib, NULL);
break;
}
}
string_cstring_free(cclass);
}
/*
=item C<STRING *
parrot_split_path_ext(Interp*, STRING *in, STRING **wo_ext, STRING **ext)>
Split the pathstring C<in> into <path><filestem><ext>. Return the
C<filestem> of the pathstring. Set C<wo_ext> to the part without
extension and C<ext> to the extension or NULL.
=cut
*/
STRING *
parrot_split_path_ext(Interp* interpreter, STRING *in,
STRING **wo_ext, STRING **ext)
{
STRING *slash1, *slash2, *dot, *stem;
INTVAL pos_sl, pos_dot, len;
slash1 = CONST_STRING(interpreter, "/");
slash2 = CONST_STRING(interpreter, "\\");
dot = CONST_STRING(interpreter, ".");
len = string_length(interpreter, in);
pos_sl = CHARSET_RINDEX(interpreter, in, slash1, len);
if (pos_sl == -1)
pos_sl = CHARSET_RINDEX(interpreter, in, slash2, len);
pos_dot = CHARSET_RINDEX(interpreter, in, dot, len);
/* XXX directory parrot-0.4.1 or such */
if (pos_dot != -1 && isdigit( ((char*)in->strstart)[pos_dot+1]))
pos_dot = -1;
++pos_dot;
++pos_sl;
if (pos_sl && pos_dot ) {
stem = string_substr(interpreter, in, pos_sl, pos_dot - pos_sl - 1,
NULL, 0);
*wo_ext = string_substr(interpreter, in, 0, pos_dot - 1, NULL, 0);
*ext = string_substr(interpreter, in, pos_dot, len - pos_dot, NULL, 0);
}
else if (pos_dot) {
stem = string_substr(interpreter, in, 0, pos_dot - 1, NULL, 0);
*wo_ext = stem;
*ext = string_substr(interpreter, in, pos_dot, len - pos_dot, NULL, 0);
}
else if (pos_sl) {
stem = string_substr(interpreter, in, pos_sl, len - pos_sl, NULL, 0);
*wo_ext = string_copy(interpreter, in);
*ext = 0;
}
else {
stem = string_copy(interpreter, in);
*wo_ext = stem;
*ext = NULL;
}
return stem;
}
/*
=back
=head1 SEE ALSO
F<include/parrot/library.h>
=cut
*/
/*
* Local variables:
* c-file-style: "parrot"
* End:
* vim: expandtab shiftwidth=4:
*/