зеркало из https://github.com/github/ruby.git
669 строки
15 KiB
C
669 строки
15 KiB
C
/*
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* load methods from eval.c
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*/
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#include "eval_intern.h"
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VALUE ruby_dln_librefs;
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#define IS_RBEXT(e) (strcmp(e, ".rb") == 0)
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#define IS_SOEXT(e) (strcmp(e, ".so") == 0 || strcmp(e, ".o") == 0)
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#ifdef DLEXT2
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#define IS_DLEXT(e) (strcmp(e, DLEXT) == 0 || strcmp(e, DLEXT2) == 0)
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#else
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#define IS_DLEXT(e) (strcmp(e, DLEXT) == 0)
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#endif
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static const char *const loadable_ext[] = {
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".rb", DLEXT,
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#ifdef DLEXT2
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DLEXT2,
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#endif
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0
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};
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VALUE rb_load_path; /* to be moved to VM */
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static VALUE
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get_load_path(void)
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{
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VALUE load_path = rb_load_path;
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VALUE ary = rb_ary_new2(RARRAY_LEN(load_path));
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long i;
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for (i = 0; i < RARRAY_LEN(load_path); ++i) {
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rb_ary_push(ary, rb_file_expand_path(RARRAY_PTR(load_path)[i], Qnil));
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}
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return ary;
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}
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static VALUE
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get_loaded_features(void)
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{
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return GET_VM()->loaded_features;
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}
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static st_table *
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get_loading_table(void)
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{
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return GET_VM()->loading_table;
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}
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static VALUE
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loaded_feature_path(const char *name, long vlen, const char *feature, long len,
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int type, VALUE load_path)
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{
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long i;
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for (i = 0; i < RARRAY_LEN(load_path); ++i) {
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VALUE p = RARRAY_PTR(load_path)[i];
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const char *s = StringValuePtr(p);
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long n = RSTRING_LEN(p);
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if (vlen < n + len + 1) continue;
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if (n && (strncmp(name, s, n) || name[n] != '/')) continue;
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if (strncmp(name + n + 1, feature, len)) continue;
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if (name[n+len+1] && name[n+len+1] != '.') continue;
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switch (type) {
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case 's':
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if (IS_DLEXT(&name[n+len+1])) return p;
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break;
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case 'r':
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if (IS_RBEXT(&name[n+len+1])) return p;
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break;
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default:
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return p;
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}
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}
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return 0;
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}
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struct loaded_feature_searching {
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const char *name;
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long len;
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int type;
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VALUE load_path;
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const char *result;
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};
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static int
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loaded_feature_path_i(st_data_t v, st_data_t b, st_data_t f)
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{
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const char *s = (const char *)v;
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struct loaded_feature_searching *fp = (struct loaded_feature_searching *)f;
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VALUE p = loaded_feature_path(s, strlen(s), fp->name, fp->len,
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fp->type, fp->load_path);
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if (!p) return ST_CONTINUE;
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fp->result = s;
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return ST_STOP;
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}
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static int
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rb_feature_p(const char *feature, const char *ext, int rb, int expanded)
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{
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VALUE v, features, p, load_path = 0;
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const char *f, *e;
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long i, len, elen, n;
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st_table *loading_tbl;
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int type;
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if (ext) {
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len = ext - feature;
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elen = strlen(ext);
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type = rb ? 'r' : 's';
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}
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else {
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len = strlen(feature);
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elen = 0;
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type = 0;
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}
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features = get_loaded_features();
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for (i = 0; i < RARRAY_LEN(features); ++i) {
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v = RARRAY_PTR(features)[i];
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f = StringValuePtr(v);
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if ((n = RSTRING_LEN(v)) < len) continue;
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if (strncmp(f, feature, len) != 0) {
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if (expanded) continue;
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if (!load_path) load_path = get_load_path();
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if (!(p = loaded_feature_path(f, n, feature, len, type, load_path)))
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continue;
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f += RSTRING_LEN(p) + 1;
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}
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if (!*(e = f + len)) {
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if (ext) continue;
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return 'u';
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}
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if (*e != '.') continue;
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if ((!rb || !ext) && (IS_SOEXT(e) || IS_DLEXT(e))) {
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return 's';
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}
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if ((rb || !ext) && (IS_RBEXT(e))) {
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return 'r';
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}
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}
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loading_tbl = get_loading_table();
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if (loading_tbl) {
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if (!expanded) {
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struct loaded_feature_searching fs;
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fs.name = feature;
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fs.len = len;
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fs.type = type;
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fs.load_path = load_path ? load_path : get_load_path();
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fs.result = 0;
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st_foreach(loading_tbl, loaded_feature_path_i, (st_data_t)&fs);
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if (fs.result) goto loading;
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}
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if (st_lookup(loading_tbl, (st_data_t)feature, 0)) {
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loading:
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if (!ext) return 'u';
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return !IS_RBEXT(ext) ? 's' : 'r';
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}
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else {
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char *buf;
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if (ext && *ext) return 0;
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buf = ALLOCA_N(char, len + DLEXT_MAXLEN + 1);
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MEMCPY(buf, feature, char, len);
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for (i = 0; (e = loadable_ext[i]) != 0; i++) {
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strncpy(buf + len, e, DLEXT_MAXLEN + 1);
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if (st_lookup(loading_tbl, (st_data_t)buf, 0)) {
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return i ? 's' : 'r';
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}
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}
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}
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}
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return 0;
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}
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int
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rb_provided(const char *feature)
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{
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const char *ext = strrchr(feature, '.');
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if (ext && !strchr(ext, '/')) {
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if (IS_RBEXT(ext)) {
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if (rb_feature_p(feature, ext, Qtrue, Qfalse)) return Qtrue;
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return Qfalse;
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}
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else if (IS_SOEXT(ext) || IS_DLEXT(ext)) {
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if (rb_feature_p(feature, ext, Qfalse, Qfalse)) return Qtrue;
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return Qfalse;
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}
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}
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if (rb_feature_p(feature, feature + strlen(feature), Qtrue, Qfalse))
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return Qtrue;
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return Qfalse;
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}
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static void
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rb_provide_feature(VALUE feature)
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{
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rb_ary_push(get_loaded_features(), feature);
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}
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void
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rb_provide(const char *feature)
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{
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rb_provide_feature(rb_str_new2(feature));
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}
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NORETURN(static void load_failed _((VALUE)));
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void
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rb_load(VALUE fname, int wrap)
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{
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VALUE tmp;
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int state;
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rb_thread_t *th = GET_THREAD();
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volatile VALUE wrapper = th->top_wrapper;
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volatile VALUE self = th->top_self;
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volatile int parse_in_eval;
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volatile int loaded = Qfalse;
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#ifndef __GNUC__
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rb_thread_t *volatile th0 = th;
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#endif
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FilePathValue(fname);
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fname = rb_str_new4(fname);
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tmp = rb_find_file(fname);
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if (!tmp) {
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load_failed(fname);
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}
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RB_GC_GUARD(fname) = rb_str_new4(tmp);
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th->errinfo = Qnil; /* ensure */
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if (!wrap) {
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rb_secure(4); /* should alter global state */
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th->top_wrapper = 0;
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}
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else {
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/* load in anonymous module as toplevel */
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th->top_self = rb_obj_clone(rb_vm_top_self());
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th->top_wrapper = rb_module_new();
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rb_extend_object(th->top_self, th->top_wrapper);
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}
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parse_in_eval = th->parse_in_eval;
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PUSH_TAG();
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state = EXEC_TAG();
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if (state == 0) {
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NODE *node;
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VALUE iseq;
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th->parse_in_eval++;
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node = (NODE *)rb_load_file(RSTRING_PTR(fname));
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th->parse_in_eval--;
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loaded = Qtrue;
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iseq = rb_iseq_new(node, rb_str_new2("<top (required)>"),
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fname, Qfalse, ISEQ_TYPE_TOP);
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rb_iseq_eval(iseq);
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}
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POP_TAG();
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#ifndef __GNUC__
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th = th0;
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fname = RB_GC_GUARD(fname);
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#endif
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th->parse_in_eval = parse_in_eval;
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th->top_self = self;
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th->top_wrapper = wrapper;
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if (!loaded) {
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rb_exc_raise(GET_THREAD()->errinfo);
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}
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if (state) {
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vm_jump_tag_but_local_jump(state, Qundef);
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}
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if (!NIL_P(GET_THREAD()->errinfo)) {
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/* exception during load */
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rb_exc_raise(th->errinfo);
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}
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}
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void
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rb_load_protect(VALUE fname, int wrap, int *state)
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{
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int status;
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PUSH_TAG();
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if ((status = EXEC_TAG()) == 0) {
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rb_load(fname, wrap);
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}
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POP_TAG();
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if (state)
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*state = status;
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}
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/*
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* call-seq:
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* load(filename, wrap=false) => true
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*
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* Loads and executes the Ruby
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* program in the file _filename_. If the filename does not
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* resolve to an absolute path, the file is searched for in the library
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* directories listed in <code>$:</code>. If the optional _wrap_
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* parameter is +true+, the loaded script will be executed
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* under an anonymous module, protecting the calling program's global
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* namespace. In no circumstance will any local variables in the loaded
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* file be propagated to the loading environment.
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*/
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static VALUE
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rb_f_load(argc, argv)
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int argc;
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VALUE *argv;
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{
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VALUE fname, wrap;
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rb_scan_args(argc, argv, "11", &fname, &wrap);
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rb_load(fname, RTEST(wrap));
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return Qtrue;
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}
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static char *
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load_lock(const char *ftptr)
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{
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st_data_t data;
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st_table *loading_tbl = get_loading_table();
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if (!loading_tbl || !st_lookup(loading_tbl, (st_data_t)ftptr, &data)) {
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/* loading ruby library should be serialized. */
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if (!loading_tbl) {
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GET_VM()->loading_table = loading_tbl = st_init_strtable();
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}
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/* partial state */
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ftptr = ruby_strdup(ftptr);
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data = (st_data_t)rb_barrier_new();
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st_insert(loading_tbl, (st_data_t)ftptr, data);
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return (char *)ftptr;
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}
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return RTEST(rb_barrier_wait((VALUE)data)) ? (char *)ftptr : 0;
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}
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static void
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load_unlock(const char *ftptr)
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{
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if (ftptr) {
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st_data_t key = (st_data_t)ftptr;
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st_data_t data;
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st_table *loading_tbl = get_loading_table();
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if (st_delete(loading_tbl, &key, &data)) {
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free((char *)key);
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rb_barrier_release((VALUE)data);
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}
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}
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}
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/*
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* call-seq:
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* require(string) => true or false
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*
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* Ruby tries to load the library named _string_, returning
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* +true+ if successful. If the filename does not resolve to
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* an absolute path, it will be searched for in the directories listed
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* in <code>$:</code>. If the file has the extension ``.rb'', it is
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* loaded as a source file; if the extension is ``.so'', ``.o'', or
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* ``.dll'', or whatever the default shared library extension is on
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* the current platform, Ruby loads the shared library as a Ruby
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* extension. Otherwise, Ruby tries adding ``.rb'', ``.so'', and so on
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* to the name. The name of the loaded feature is added to the array in
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* <code>$"</code>. A feature will not be loaded if it's name already
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* appears in <code>$"</code>. However, the file name is not converted
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* to an absolute path, so that ``<code>require 'a';require
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* './a'</code>'' will load <code>a.rb</code> twice.
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*
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* require "my-library.rb"
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* require "db-driver"
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*/
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VALUE
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rb_f_require(VALUE obj, VALUE fname)
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{
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return rb_require_safe(fname, rb_safe_level());
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}
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static int
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search_required(VALUE fname, volatile VALUE *path)
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{
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VALUE tmp;
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char *ext, *ftptr;
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int type, ft = 0;
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*path = 0;
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ext = strrchr(ftptr = RSTRING_PTR(fname), '.');
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if (ext && !strchr(ext, '/')) {
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if (IS_RBEXT(ext)) {
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if (rb_feature_p(ftptr, ext, Qtrue, Qfalse))
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return 'r';
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if ((tmp = rb_find_file(fname)) != 0) {
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tmp = rb_file_expand_path(tmp, Qnil);
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ext = strrchr(ftptr = RSTRING_PTR(tmp), '.');
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if (!rb_feature_p(ftptr, ext, Qtrue, Qtrue))
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*path = tmp;
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return 'r';
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}
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return 0;
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}
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else if (IS_SOEXT(ext)) {
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if (rb_feature_p(ftptr, ext, Qfalse, Qfalse))
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return 's';
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tmp = rb_str_new(RSTRING_PTR(fname), ext - RSTRING_PTR(fname));
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#ifdef DLEXT2
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OBJ_FREEZE(tmp);
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if (rb_find_file_ext(&tmp, loadable_ext + 1)) {
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tmp = rb_file_expand_path(tmp, Qnil);
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ext = strrchr(ftptr = RSTRING_PTR(tmp), '.');
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if (!rb_feature_p(ftptr, ext, Qfalse, Qtrue))
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*path = tmp;
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return 's';
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}
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#else
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rb_str_cat2(tmp, DLEXT);
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OBJ_FREEZE(tmp);
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if ((tmp = rb_find_file(tmp)) != 0) {
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tmp = rb_file_expand_path(tmp, Qnil);
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ext = strrchr(ftptr = RSTRING_PTR(tmp), '.');
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if (!rb_feature_p(ftptr, ext, Qfalse, Qtrue))
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*path = tmp;
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return 's';
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}
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#endif
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}
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else if (IS_DLEXT(ext)) {
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if (rb_feature_p(ftptr, ext, Qfalse, Qfalse))
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return 's';
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if ((tmp = rb_find_file(fname)) != 0) {
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tmp = rb_file_expand_path(tmp, Qnil);
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ext = strrchr(ftptr = RSTRING_PTR(tmp), '.');
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if (!rb_feature_p(ftptr, ext, Qfalse, Qtrue))
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*path = tmp;
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return 's';
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}
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}
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}
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else if ((ft = rb_feature_p(ftptr, 0, Qfalse, Qfalse)) == 'r') {
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return 'r';
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}
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tmp = fname;
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type = rb_find_file_ext(&tmp, loadable_ext);
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tmp = rb_file_expand_path(tmp, Qnil);
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switch (type) {
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case 0:
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ftptr = RSTRING_PTR(tmp);
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if (ft)
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break;
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return rb_feature_p(ftptr, 0, Qfalse, Qtrue);
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default:
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if (ft)
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break;
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case 1:
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ext = strrchr(ftptr = RSTRING_PTR(tmp), '.');
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if (rb_feature_p(ftptr, ext, !--type, Qtrue))
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break;
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*path = tmp;
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}
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return type ? 's' : 'r';
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}
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static void
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load_failed(VALUE fname)
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{
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rb_raise(rb_eLoadError, "no such file to load -- %s",
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RSTRING_PTR(fname));
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}
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static VALUE
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load_ext(VALUE path)
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{
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SCOPE_SET(NOEX_PUBLIC);
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return (VALUE)dln_load(RSTRING_PTR(path));
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}
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VALUE
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rb_require_safe(VALUE fname, int safe)
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{
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VALUE result = Qnil;
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rb_thread_t *th = GET_THREAD();
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volatile VALUE errinfo = th->errinfo;
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int state;
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struct {
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int safe;
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} volatile saved;
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char *volatile ftptr = 0;
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|
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PUSH_TAG();
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saved.safe = rb_safe_level();
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if ((state = EXEC_TAG()) == 0) {
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VALUE path;
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long handle;
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int found;
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|
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rb_set_safe_level_force(safe);
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FilePathValue(fname);
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RB_GC_GUARD(fname) = rb_str_new4(fname);
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found = search_required(fname, &path);
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if (found) {
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if (!path || !(ftptr = load_lock(RSTRING_PTR(path)))) {
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result = Qfalse;
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}
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else {
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rb_set_safe_level_force(0);
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switch (found) {
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case 'r':
|
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rb_load(path, 0);
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break;
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|
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case 's':
|
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handle = (long)rb_vm_call_cfunc(rb_vm_top_self(), load_ext,
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path, 0, path);
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rb_ary_push(ruby_dln_librefs, LONG2NUM(handle));
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break;
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}
|
|
rb_provide_feature(path);
|
|
result = Qtrue;
|
|
}
|
|
}
|
|
}
|
|
POP_TAG();
|
|
load_unlock(ftptr);
|
|
|
|
rb_set_safe_level_force(saved.safe);
|
|
if (state) {
|
|
JUMP_TAG(state);
|
|
}
|
|
|
|
if (NIL_P(result)) {
|
|
load_failed(fname);
|
|
}
|
|
|
|
th->errinfo = errinfo;
|
|
|
|
return result;
|
|
}
|
|
|
|
VALUE
|
|
rb_require(const char *fname)
|
|
{
|
|
VALUE fn = rb_str_new2(fname);
|
|
OBJ_FREEZE(fn);
|
|
return rb_require_safe(fn, rb_safe_level());
|
|
}
|
|
|
|
static VALUE
|
|
init_ext_call(VALUE arg)
|
|
{
|
|
SCOPE_SET(NOEX_PUBLIC);
|
|
(*(void (*)(void))arg)();
|
|
return Qnil;
|
|
}
|
|
|
|
void
|
|
ruby_init_ext(const char *name, void (*init)(void))
|
|
{
|
|
if (load_lock(name)) {
|
|
rb_vm_call_cfunc(rb_vm_top_self(), init_ext_call, (VALUE)init,
|
|
0, rb_str_new2(name));
|
|
rb_provide(name);
|
|
load_unlock(name);
|
|
}
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* mod.autoload(name, filename) => nil
|
|
*
|
|
* Registers _filename_ to be loaded (using <code>Kernel::require</code>)
|
|
* the first time that _module_ (which may be a <code>String</code> or
|
|
* a symbol) is accessed in the namespace of _mod_.
|
|
*
|
|
* module A
|
|
* end
|
|
* A.autoload(:B, "b")
|
|
* A::B.doit # autoloads "b"
|
|
*/
|
|
|
|
static VALUE
|
|
rb_mod_autoload(VALUE mod, VALUE sym, VALUE file)
|
|
{
|
|
ID id = rb_to_id(sym);
|
|
|
|
Check_SafeStr(file);
|
|
rb_autoload(mod, id, RSTRING_PTR(file));
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* MISSING: documentation
|
|
*/
|
|
|
|
static VALUE
|
|
rb_mod_autoload_p(VALUE mod, VALUE sym)
|
|
{
|
|
return rb_autoload_p(mod, rb_to_id(sym));
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* autoload(module, filename) => nil
|
|
*
|
|
* Registers _filename_ to be loaded (using <code>Kernel::require</code>)
|
|
* the first time that _module_ (which may be a <code>String</code> or
|
|
* a symbol) is accessed.
|
|
*
|
|
* autoload(:MyModule, "/usr/local/lib/modules/my_module.rb")
|
|
*/
|
|
|
|
static VALUE
|
|
rb_f_autoload(VALUE obj, VALUE sym, VALUE file)
|
|
{
|
|
VALUE klass = ruby_cbase();
|
|
if (NIL_P(klass)) {
|
|
rb_raise(rb_eTypeError, "Can not set autoload on singleton class");
|
|
}
|
|
return rb_mod_autoload(klass, sym, file);
|
|
}
|
|
|
|
/*
|
|
* MISSING: documentation
|
|
*/
|
|
|
|
static VALUE
|
|
rb_f_autoload_p(VALUE obj, VALUE sym)
|
|
{
|
|
/* use ruby_cbase() as same as rb_f_autoload. */
|
|
VALUE klass = ruby_cbase();
|
|
if (NIL_P(klass)) {
|
|
return Qnil;
|
|
}
|
|
return rb_mod_autoload_p(klass, sym);
|
|
}
|
|
|
|
void
|
|
Init_load()
|
|
{
|
|
rb_define_readonly_variable("$:", &rb_load_path);
|
|
rb_define_readonly_variable("$-I", &rb_load_path);
|
|
rb_define_readonly_variable("$LOAD_PATH", &rb_load_path);
|
|
rb_load_path = rb_ary_new();
|
|
|
|
rb_define_virtual_variable("$\"", get_loaded_features, 0);
|
|
rb_define_virtual_variable("$LOADED_FEATURES", get_loaded_features, 0);
|
|
GET_VM()->loaded_features = rb_ary_new();
|
|
|
|
rb_define_global_function("load", rb_f_load, -1);
|
|
rb_define_global_function("require", rb_f_require, 1);
|
|
rb_define_method(rb_cModule, "autoload", rb_mod_autoload, 2);
|
|
rb_define_method(rb_cModule, "autoload?", rb_mod_autoload_p, 1);
|
|
rb_define_global_function("autoload", rb_f_autoload, 2);
|
|
rb_define_global_function("autoload?", rb_f_autoload_p, 1);
|
|
|
|
ruby_dln_librefs = rb_ary_new();
|
|
rb_register_mark_object(ruby_dln_librefs);
|
|
}
|