From 3db12e8b236ac8f88db8eb4690d10e4a3b8dbcd4 Mon Sep 17 00:00:00 2001 From: matz Date: Fri, 16 Jan 1998 12:13:05 +0000 Subject: Initial revision git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/trunk@2 b2dd03c8-39d4-4d8f-98ff-823fe69b080e --- ext/dbm/dbm.c | 515 ++++++++++++++++++++++++++++++++++++++++++++++++++++++++++ 1 file changed, 515 insertions(+) create mode 100644 ext/dbm/dbm.c (limited to 'ext/dbm/dbm.c') diff --git a/ext/dbm/dbm.c b/ext/dbm/dbm.c new file mode 100644 index 0000000000..ea0ac1930f --- /dev/null +++ b/ext/dbm/dbm.c @@ -0,0 +1,515 @@ +/************************************************ + + dbm.c - + + $Author$ + $Date$ + created at: Mon Jan 24 15:59:52 JST 1994 + + Copyright (C) 1995 Yukihiro Matsumoto + +************************************************/ + +#include "ruby.h" + +#include +#include +#include + +VALUE cDBM; + +extern VALUE mEnumerable; + +struct dbmdata { + int di_size; + DBM *di_dbm; +}; + +static void +closed_dbm() +{ + Fail("closed DBM file"); +} + +#define GetDBM(obj, dbmp) {\ + Data_Get_Struct(obj, struct dbmdata, dbmp);\ + if (dbmp->di_dbm == 0) closed_dbm();\ +} + +static void +free_dbm(dbmp) + struct dbmdata *dbmp; +{ + if (dbmp->di_dbm) dbm_close(dbmp->di_dbm); +} + +static VALUE +fdbm_s_open(argc, argv, class) + int argc; + VALUE *argv; + VALUE class; +{ + 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 = dbm_open(RSTRING(file)->ptr, O_RDWR|O_CREAT, mode); + if (!dbm) + dbm = dbm_open(RSTRING(file)->ptr, O_RDWR, mode); + if (!dbm) + dbm = dbm_open(RSTRING(file)->ptr, O_RDONLY, mode); + + if (!dbm) { + if (mode == -1) return Qnil; + rb_sys_fail(RSTRING(file)->ptr); + } + + obj = Data_Make_Struct(class,struct dbmdata,0,free_dbm,dbmp); + dbmp->di_dbm = dbm; + dbmp->di_size = -1; + + return obj; +} + +static VALUE +fdbm_close(obj) + VALUE obj; +{ + struct dbmdata *dbmp; + + Data_Get_Struct(obj, struct dbmdata, dbmp); + if (dbmp->di_dbm == 0) closed_dbm(); + dbm_close(dbmp->di_dbm); + dbmp->di_dbm = 0; + + return Qnil; +} + +static VALUE +fdbm_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 = dbm_fetch(dbm, key); + if (value.dptr == 0) { + return Qnil; + } + return str_taint(str_new(value.dptr, value.dsize)); +} + +static VALUE +fdbm_indexes(obj, args) + VALUE obj; + struct RArray *args; +{ + VALUE *p, *pend; + VALUE new; + int i = 0; + + args = (struct RArray*)rb_to_a(args); + new = ary_new2(args->len); + + p = args->ptr; pend = p + args->len; + while (p < pend) { + ary_push(new, fdbm_fetch(obj, *p++)); + } + return new; +} + +static VALUE +fdbm_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 = dbm_fetch(dbm, key); + if (value.dptr == 0) { + if (iterator_p()) rb_yield(keystr); + return Qnil; + } + + if (dbm_delete(dbm, key)) { + dbmp->di_size = -1; + Fail("dbm_delete failed"); + } + else if (dbmp->di_size >= 0) { + dbmp->di_size--; + } + return obj; +} + +static VALUE +fdbm_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 = dbm_firstkey(dbm); + if (!key.dptr) return Qnil; + val = dbm_fetch(dbm, key); + dbm_delete(dbm, key); + + keystr = str_taint(str_new(key.dptr, key.dsize)); + valstr = str_taint(str_new(val.dptr, val.dsize)); + return assoc_new(keystr, valstr); +} + +static VALUE +fdbm_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 = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + val = dbm_fetch(dbm, key); + keystr = str_taint(str_new(key.dptr, key.dsize)); + valstr = str_taint(str_new(val.dptr, val.dsize)); + if (RTEST(rb_yield(assoc_new(keystr, valstr)))) { + if (dbm_delete(dbm, key)) { + Fail("dbm_delete failed"); + } + } + } + return obj; +} + +static VALUE +fdbm_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 = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + if (dbm_delete(dbm, key)) { + Fail("dbm_delete failed"); + } + } + return obj; +} + +static VALUE +fdbm_store(obj, keystr, valstr) + VALUE obj, keystr, valstr; +{ + datum key, val; + struct dbmdata *dbmp; + DBM *dbm; + + if (valstr == Qnil) { + fdbm_delete(obj, keystr); + return Qnil; + } + + rb_secure(4); + keystr = obj_as_string(keystr); + + key.dptr = RSTRING(keystr)->ptr; + key.dsize = RSTRING(keystr)->len; + + if (NIL_P(valstr)) return fdbm_delete(obj, keystr); + + valstr = 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 (dbm_store(dbm, key, val, DBM_REPLACE)) { + dbm_clearerr(dbm); + if (errno == EPERM) rb_sys_fail(Qnil); + Fail("dbm_store failed"); + } + + return valstr; +} + +static VALUE +fdbm_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 = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + i++; + } + dbmp->di_size = i; + + return INT2FIX(i); +} + +static VALUE +fdbm_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 = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + i++; + } + } + else { + i = dbmp->di_size; + } + if (i == 0) return TRUE; + return FALSE; +} + +static VALUE +fdbm_each_value(obj) + VALUE obj; +{ + datum key, val; + struct dbmdata *dbmp; + DBM *dbm; + + GetDBM(obj, dbmp); + dbm = dbmp->di_dbm; + for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + val = dbm_fetch(dbm, key); + rb_yield(str_taint(str_new(val.dptr, val.dsize))); + } + return obj; +} + +static VALUE +fdbm_each_key(obj) + VALUE obj; +{ + datum key; + struct dbmdata *dbmp; + DBM *dbm; + + GetDBM(obj, dbmp); + dbm = dbmp->di_dbm; + for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + rb_yield(str_taint(str_new(key.dptr, key.dsize))); + } + return obj; +} + +static VALUE +fdbm_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 = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + val = dbm_fetch(dbm, key); + keystr = str_taint(str_new(key.dptr, key.dsize)); + valstr = str_taint(str_new(val.dptr, val.dsize)); + rb_yield(assoc_new(keystr, valstr)); + } + + return obj; +} + +static VALUE +fdbm_keys(obj) + VALUE obj; +{ + datum key; + struct dbmdata *dbmp; + DBM *dbm; + VALUE ary; + + GetDBM(obj, dbmp); + dbm = dbmp->di_dbm; + + ary = ary_new(); + for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + ary_push(ary, str_taint(str_new(key.dptr, key.dsize))); + } + + return ary; +} + +static VALUE +fdbm_values(obj) + VALUE obj; +{ + datum key, val; + struct dbmdata *dbmp; + DBM *dbm; + VALUE ary; + + GetDBM(obj, dbmp); + dbm = dbmp->di_dbm; + + ary = ary_new(); + for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + val = dbm_fetch(dbm, key); + ary_push(ary, str_taint(str_new(val.dptr, val.dsize))); + } + + return ary; +} + +static VALUE +fdbm_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 = dbm_fetch(dbm, key); + if (val.dptr) return TRUE; + return FALSE; +} + +static VALUE +fdbm_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 = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + val = dbm_fetch(dbm, key); + if (val.dsize == RSTRING(valstr)->len && + memcmp(val.dptr, RSTRING(valstr)->ptr, val.dsize) == 0) + return TRUE; + } + return FALSE; +} + +static VALUE +fdbm_to_a(obj) + VALUE obj; +{ + datum key, val; + struct dbmdata *dbmp; + DBM *dbm; + VALUE ary; + + GetDBM(obj, dbmp); + dbm = dbmp->di_dbm; + + ary = ary_new(); + for (key = dbm_firstkey(dbm); key.dptr; key = dbm_nextkey(dbm)) { + val = dbm_fetch(dbm, key); + ary_push(ary, assoc_new(str_taint(str_new(key.dptr, key.dsize)), + str_taint(str_new(val.dptr, val.dsize)))); + } + + return ary; +} + +Init_dbm() +{ + cDBM = rb_define_class("DBM", cObject); + rb_include_module(cDBM, mEnumerable); + + rb_define_singleton_method(cDBM, "open", fdbm_s_open, -1); + rb_define_method(cDBM, "close", fdbm_close, 0); + rb_define_method(cDBM, "[]", fdbm_fetch, 1); + rb_define_method(cDBM, "[]=", fdbm_store, 2); + rb_define_method(cDBM, "indexes", fdbm_indexes, -2); + rb_define_method(cDBM, "length", fdbm_length, 0); + rb_define_alias(cDBM, "size", "length"); + rb_define_method(cDBM, "empty?", fdbm_empty_p, 0); + rb_define_method(cDBM, "each", fdbm_each_pair, 0); + rb_define_method(cDBM, "each_value", fdbm_each_value, 0); + rb_define_method(cDBM, "each_key", fdbm_each_key, 0); + rb_define_method(cDBM, "each_pair", fdbm_each_pair, 0); + rb_define_method(cDBM, "keys", fdbm_keys, 0); + rb_define_method(cDBM, "values", fdbm_values, 0); + rb_define_method(cDBM, "shift", fdbm_shift, 1); + rb_define_method(cDBM, "delete", fdbm_delete, 1); + rb_define_method(cDBM, "delete_if", fdbm_delete_if, 0); + rb_define_method(cDBM, "clear", fdbm_clear, 0); + rb_define_method(cDBM, "include?", fdbm_has_key, 1); + rb_define_method(cDBM, "has_key?", fdbm_has_key, 1); + rb_define_method(cDBM, "has_value?", fdbm_has_value, 1); + rb_define_method(cDBM, "key?", fdbm_has_key, 1); + rb_define_method(cDBM, "value?", fdbm_has_value, 1); + + rb_define_method(cDBM, "to_a", fdbm_to_a, 0); +} -- cgit v1.2.3