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-rw-r--r--ext/sdbm/init.c584
1 files changed, 584 insertions, 0 deletions
diff --git a/ext/sdbm/init.c b/ext/sdbm/init.c
new file mode 100644
index 0000000..5ebffcb
--- /dev/null
+++ b/ext/sdbm/init.c
@@ -0,0 +1,584 @@
+/************************************************
+
+ sdbminit.c -
+
+ $Author$
+ $Date$
+ created at: Fri May 7 08:34:24 JST 1999
+
+ Copyright (C) 1995-1998 Yukihiro Matsumoto
+
+************************************************/
+
+#include "ruby.h"
+
+#include "sdbm.h"
+#include <fcntl.h>
+#include <errno.h>
+#ifdef USE_CWGUSI
+# include <sys/errno.h>
+#endif
+
+VALUE cSDBM;
+
+struct dbmdata {
+ int di_size;
+ DBM *di_dbm;
+};
+
+static void
+closed_sdbm()
+{
+ rb_raise(rb_eRuntimeError, "closed SDBM file");
+}
+
+#define GetDBM(obj, dbmp) {\
+ Data_Get_Struct(obj, struct dbmdata, dbmp);\
+ if (dbmp->di_dbm == 0) closed_sdbm();\
+}
+
+static void
+free_sdbm(dbmp)
+ struct dbmdata *dbmp;
+{
+
+ if (dbmp->di_dbm) sdbm_close(dbmp->di_dbm);
+ free(dbmp);
+}
+
+static VALUE
+fsdbm_s_open(argc, argv, klass)
+ int argc;
+ VALUE *argv;
+ VALUE klass;
+{
+ VALUE file, vmode;
+ DBM *dbm;
+ struct dbmdata *dbmp;
+ int mode;
+ VALUE obj;
+
+ if (rb_scan_args(argc, argv, "11", &file, &vmode) == 1) {
+ mode = 0666; /* default value */
+ }
+ else if (NIL_P(vmode)) {
+ mode = -1; /* return nil if DB not exist */
+ }
+ else {
+ mode = NUM2INT(vmode);
+ }
+ Check_SafeStr(file);
+
+ dbm = 0;
+ if (mode >= 0)
+ dbm = sdbm_open(RSTRING(file)->ptr, O_RDWR|O_CREAT, mode);
+ if (!dbm)
+ dbm = sdbm_open(RSTRING(file)->ptr, O_RDWR, mode);
+ if (!dbm)
+ dbm = sdbm_open(RSTRING(file)->ptr, O_RDONLY, mode);
+
+ if (!dbm) {
+ if (mode == -1) return Qnil;
+ rb_sys_fail(RSTRING(file)->ptr);
+ }
+
+ obj = Data_Make_Struct(klass,struct dbmdata,0,free_sdbm,dbmp);
+ dbmp->di_dbm = dbm;
+ dbmp->di_size = -1;
+
+ return obj;
+}
+
+static VALUE
+fsdbm_close(obj)
+ VALUE obj;
+{
+ struct dbmdata *dbmp;
+
+ Data_Get_Struct(obj, struct dbmdata, dbmp);
+ if (dbmp->di_dbm == 0) closed_sdbm();
+ sdbm_close(dbmp->di_dbm);
+ dbmp->di_dbm = 0;
+
+ return Qnil;
+}
+
+static VALUE
+fsdbm_fetch(obj, keystr)
+ VALUE obj, keystr;
+{
+ datum key, value;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+
+ Check_Type(keystr, T_STRING);
+ key.dptr = RSTRING(keystr)->ptr;
+ key.dsize = RSTRING(keystr)->len;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+ value = sdbm_fetch(dbm, key);
+ if (value.dptr == 0) {
+ return Qnil;
+ }
+ return rb_tainted_str_new(value.dptr, value.dsize);
+}
+
+static VALUE
+fsdbm_indexes(argc, argv, obj)
+ int argc;
+ VALUE *argv;
+ VALUE obj;
+{
+ VALUE new;
+ int i;
+
+ new = rb_ary_new2(argc);
+ for (i=0; i<argc; i++) {
+ rb_ary_push(new, fsdbm_fetch(obj, argv[i]));
+ }
+
+ return new;
+}
+
+static VALUE
+fsdbm_delete(obj, keystr)
+ VALUE obj, keystr;
+{
+ datum key, value;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+
+ rb_secure(4);
+ Check_Type(keystr, T_STRING);
+ key.dptr = RSTRING(keystr)->ptr;
+ key.dsize = RSTRING(keystr)->len;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+
+ value = sdbm_fetch(dbm, key);
+ if (value.dptr == 0) {
+ if (rb_iterator_p()) rb_yield(keystr);
+ return Qnil;
+ }
+
+ if (sdbm_delete(dbm, key)) {
+ dbmp->di_size = -1;
+ rb_raise(rb_eRuntimeError, "dbm_delete failed");
+ }
+ else if (dbmp->di_size >= 0) {
+ dbmp->di_size--;
+ }
+ return obj;
+}
+
+static VALUE
+fsdbm_shift(obj)
+ VALUE obj;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+ VALUE keystr, valstr;
+
+ rb_secure(4);
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+
+ key = sdbm_firstkey(dbm);
+ if (!key.dptr) return Qnil;
+ val = sdbm_fetch(dbm, key);
+ sdbm_delete(dbm, key);
+
+ keystr = rb_tainted_str_new(key.dptr, key.dsize);
+ valstr = rb_tainted_str_new(val.dptr, val.dsize);
+ return rb_assoc_new(keystr, valstr);
+}
+
+static VALUE
+fsdbm_delete_if(obj)
+ VALUE obj;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+ VALUE keystr, valstr;
+
+ rb_secure(4);
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ val = sdbm_fetch(dbm, key);
+ keystr = rb_tainted_str_new(key.dptr, key.dsize);
+ valstr = rb_tainted_str_new(val.dptr, val.dsize);
+ if (RTEST(rb_yield(rb_assoc_new(keystr, valstr)))) {
+ if (sdbm_delete(dbm, key)) {
+ rb_raise(rb_eRuntimeError, "sdbm_delete failed");
+ }
+ }
+ }
+ return obj;
+}
+
+static VALUE
+fsdbm_clear(obj)
+ VALUE obj;
+{
+ datum key;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+
+ rb_secure(4);
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+ dbmp->di_size = -1;
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ if (sdbm_delete(dbm, key)) {
+ rb_raise(rb_eRuntimeError, "sdbm_delete failed");
+ }
+ }
+ return obj;
+}
+
+static VALUE
+fsdbm_invert(obj)
+ VALUE obj;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+ VALUE keystr, valstr;
+ VALUE hash = rb_hash_new();
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ val = sdbm_fetch(dbm, key);
+ keystr = rb_tainted_str_new(key.dptr, key.dsize);
+ valstr = rb_tainted_str_new(val.dptr, val.dsize);
+ rb_hash_aset(hash, valstr, keystr);
+ }
+ return obj;
+}
+
+static VALUE
+each_pair(obj)
+ VALUE obj;
+{
+ return rb_funcall(obj, rb_intern("each_pair"), 0, 0);
+}
+
+static VALUE fsdbm_store _((VALUE,VALUE,VALUE));
+
+static VALUE
+update_i(pair, dbm)
+ VALUE pair, dbm;
+{
+ Check_Type(pair, T_ARRAY);
+ if (RARRAY(pair)->len < 2) {
+ rb_raise(rb_eArgError, "pair must be [key, value]");
+ }
+ fsdbm_store(dbm, RARRAY(pair)->ptr[0], RARRAY(pair)->ptr[1]);
+ return Qnil;
+}
+
+static VALUE
+fsdbm_update(obj, other)
+ VALUE obj, other;
+{
+ rb_iterate(each_pair, other, update_i, obj);
+ return obj;
+}
+
+static VALUE
+fsdbm_replace(obj, other)
+ VALUE obj, other;
+{
+ fsdbm_clear(obj);
+ rb_iterate(each_pair, other, update_i, obj);
+ return obj;
+}
+
+static VALUE
+fsdbm_store(obj, keystr, valstr)
+ VALUE obj, keystr, valstr;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+
+ if (valstr == Qnil) {
+ fsdbm_delete(obj, keystr);
+ return Qnil;
+ }
+
+ rb_secure(4);
+ keystr = rb_obj_as_string(keystr);
+
+ key.dptr = RSTRING(keystr)->ptr;
+ key.dsize = RSTRING(keystr)->len;
+
+ if (NIL_P(valstr)) return fsdbm_delete(obj, keystr);
+
+ valstr = rb_obj_as_string(valstr);
+ val.dptr = RSTRING(valstr)->ptr;
+ val.dsize = RSTRING(valstr)->len;
+
+ Data_Get_Struct(obj, struct dbmdata, dbmp);
+ dbmp->di_size = -1;
+ dbm = dbmp->di_dbm;
+ if (sdbm_store(dbm, key, val, DBM_REPLACE)) {
+#ifdef HAVE_DBM_CLAERERR
+ sdbm_clearerr(dbm);
+#endif
+ if (errno == EPERM) rb_sys_fail(0);
+ rb_raise(rb_eRuntimeError, "sdbm_store failed");
+ }
+
+ return valstr;
+}
+
+static VALUE
+fsdbm_length(obj)
+ VALUE obj;
+{
+ datum key;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+ int i = 0;
+
+ Data_Get_Struct(obj, struct dbmdata, dbmp);
+ if (dbmp->di_size > 0) return INT2FIX(dbmp->di_size);
+ dbm = dbmp->di_dbm;
+
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ i++;
+ }
+ dbmp->di_size = i;
+
+ return INT2FIX(i);
+}
+
+static VALUE
+fsdbm_empty_p(obj)
+ VALUE obj;
+{
+ datum key;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+ int i = 0;
+
+ Data_Get_Struct(obj, struct dbmdata, dbmp);
+ if (dbmp->di_size < 0) {
+ dbm = dbmp->di_dbm;
+
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ i++;
+ }
+ }
+ else {
+ i = dbmp->di_size;
+ }
+ if (i == 0) return Qtrue;
+ return Qfalse;
+}
+
+static VALUE
+fsdbm_each_value(obj)
+ VALUE obj;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ val = sdbm_fetch(dbm, key);
+ rb_yield(rb_tainted_str_new(val.dptr, val.dsize));
+ }
+ return obj;
+}
+
+static VALUE
+fsdbm_each_key(obj)
+ VALUE obj;
+{
+ datum key;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ rb_yield(rb_tainted_str_new(key.dptr, key.dsize));
+ }
+ return obj;
+}
+
+static VALUE
+fsdbm_each_pair(obj)
+ VALUE obj;
+{
+ datum key, val;
+ DBM *dbm;
+ struct dbmdata *dbmp;
+ VALUE keystr, valstr;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ val = sdbm_fetch(dbm, key);
+ keystr = rb_tainted_str_new(key.dptr, key.dsize);
+ valstr = rb_tainted_str_new(val.dptr, val.dsize);
+ rb_yield(rb_assoc_new(keystr, valstr));
+ }
+
+ return obj;
+}
+
+static VALUE
+fsdbm_keys(obj)
+ VALUE obj;
+{
+ datum key;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+ VALUE ary;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+
+ ary = rb_ary_new();
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ rb_ary_push(ary, rb_tainted_str_new(key.dptr, key.dsize));
+ }
+
+ return ary;
+}
+
+static VALUE
+fsdbm_values(obj)
+ VALUE obj;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+ VALUE ary;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+
+ ary = rb_ary_new();
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ val = sdbm_fetch(dbm, key);
+ rb_ary_push(ary, rb_tainted_str_new(val.dptr, val.dsize));
+ }
+
+ return ary;
+}
+
+static VALUE
+fsdbm_has_key(obj, keystr)
+ VALUE obj, keystr;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+
+ Check_Type(keystr, T_STRING);
+ key.dptr = RSTRING(keystr)->ptr;
+ key.dsize = RSTRING(keystr)->len;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+ val = sdbm_fetch(dbm, key);
+ if (val.dptr) return Qtrue;
+ return Qfalse;
+}
+
+static VALUE
+fsdbm_has_value(obj, valstr)
+ VALUE obj, valstr;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+
+ Check_Type(valstr, T_STRING);
+ val.dptr = RSTRING(valstr)->ptr;
+ val.dsize = RSTRING(valstr)->len;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ val = sdbm_fetch(dbm, key);
+ if (val.dsize == RSTRING(valstr)->len &&
+ memcmp(val.dptr, RSTRING(valstr)->ptr, val.dsize) == 0)
+ return Qtrue;
+ }
+ return Qfalse;
+}
+
+static VALUE
+fsdbm_to_a(obj)
+ VALUE obj;
+{
+ datum key, val;
+ struct dbmdata *dbmp;
+ DBM *dbm;
+ VALUE ary;
+
+ GetDBM(obj, dbmp);
+ dbm = dbmp->di_dbm;
+
+ ary = rb_ary_new();
+ for (key = sdbm_firstkey(dbm); key.dptr; key = sdbm_nextkey(dbm)) {
+ val = sdbm_fetch(dbm, key);
+ rb_ary_push(ary, rb_assoc_new(rb_tainted_str_new(key.dptr, key.dsize),
+ rb_tainted_str_new(val.dptr, val.dsize)));
+ }
+
+ return ary;
+}
+
+void
+Init_sdbm()
+{
+ cSDBM = rb_define_class("SDBM", rb_cObject);
+ rb_include_module(cSDBM, rb_mEnumerable);
+
+ rb_define_singleton_method(cSDBM, "open", fsdbm_s_open, -1);
+ rb_define_singleton_method(cSDBM, "new", fsdbm_s_open, -1);
+ rb_define_method(cSDBM, "close", fsdbm_close, 0);
+ rb_define_method(cSDBM, "[]", fsdbm_fetch, 1);
+ rb_define_method(cSDBM, "[]=", fsdbm_store, 2);
+ rb_define_method(cSDBM, "indexes", fsdbm_indexes, -1);
+ rb_define_method(cSDBM, "indices", fsdbm_indexes, -1);
+ rb_define_method(cSDBM, "length", fsdbm_length, 0);
+ rb_define_alias(cSDBM, "size", "length");
+ rb_define_method(cSDBM, "empty?", fsdbm_empty_p, 0);
+ rb_define_method(cSDBM, "each", fsdbm_each_pair, 0);
+ rb_define_method(cSDBM, "each_value", fsdbm_each_value, 0);
+ rb_define_method(cSDBM, "each_key", fsdbm_each_key, 0);
+ rb_define_method(cSDBM, "each_pair", fsdbm_each_pair, 0);
+ rb_define_method(cSDBM, "keys", fsdbm_keys, 0);
+ rb_define_method(cSDBM, "values", fsdbm_values, 0);
+ rb_define_method(cSDBM, "shift", fsdbm_shift, 1);
+ rb_define_method(cSDBM, "delete", fsdbm_delete, 1);
+ rb_define_method(cSDBM, "delete_if", fsdbm_delete_if, 0);
+ rb_define_method(cSDBM, "clear", fsdbm_clear, 0);
+ rb_define_method(cSDBM,"invert", fsdbm_invert, 0);
+ rb_define_method(cSDBM,"update", fsdbm_update, 1);
+ rb_define_method(cSDBM,"replace", fsdbm_replace, 1);
+
+ rb_define_method(cSDBM, "include?", fsdbm_has_key, 1);
+ rb_define_method(cSDBM, "has_key?", fsdbm_has_key, 1);
+ rb_define_method(cSDBM, "has_value?", fsdbm_has_value, 1);
+ rb_define_method(cSDBM, "key?", fsdbm_has_key, 1);
+ rb_define_method(cSDBM, "value?", fsdbm_has_value, 1);
+
+ rb_define_method(cSDBM, "to_a", fsdbm_to_a, 0);
+}