зеркало из https://github.com/github/ruby.git
1307 строки
32 KiB
C
1307 строки
32 KiB
C
/************************************************
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gdbm.c -
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$Author$
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modified at: Mon Jan 24 15:59:52 JST 1994
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Documentation by Peter Adolphs < futzilogik at users dot sourceforge dot net >
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************************************************/
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#include "ruby.h"
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#include <gdbm.h>
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#include <fcntl.h>
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#include <errno.h>
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/*
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* Document-class: GDBM
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*
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* == Summary
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*
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* Ruby extension for GNU dbm (gdbm) -- a simple database engine for storing
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* key-value pairs on disk.
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*
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* == Description
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*
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* GNU dbm is a library for simple databases. A database is a file that stores
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* key-value pairs. Gdbm allows the user to store, retrieve, and delete data by
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* key. It furthermore allows a non-sorted traversal of all key-value pairs.
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* A gdbm database thus provides the same functionality as a hash. As
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* with objects of the Hash class, elements can be accessed with <tt>[]</tt>.
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* Furthermore, GDBM mixes in the Enumerable module, thus providing convenient
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* methods such as #find, #collect, #map, etc.
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*
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* A process is allowed to open several different databases at the same time.
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* A process can open a database as a "reader" or a "writer". Whereas a reader
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* has only read-access to the database, a writer has read- and write-access.
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* A database can be accessed either by any number of readers or by exactly one
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* writer at the same time.
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*
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* == Examples
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*
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* 1. Opening/creating a database, and filling it with some entries:
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*
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* require 'gdbm'
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*
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* gdbm = GDBM.new("fruitstore.db")
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* gdbm["ananas"] = "3"
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* gdbm["banana"] = "8"
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* gdbm["cranberry"] = "4909"
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* gdbm.close
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*
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* 2. Reading out a database:
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*
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* require 'gdbm'
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*
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* gdbm = GDBM.new("fruitstore.db")
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* gdbm.each_pair do |key, value|
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* print "#{key}: #{value}\n"
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* end
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* gdbm.close
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*
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* produces
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*
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* banana: 8
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* ananas: 3
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* cranberry: 4909
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*
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* == Links
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*
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* * http://www.gnu.org/software/gdbm/
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*/
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static VALUE rb_cGDBM, rb_eGDBMError, rb_eGDBMFatalError;
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#if SIZEOF_LONG > SIZEOF_INT
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#define TOO_LONG(n) ((long)(+(int)(n)) != (long)(n))
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#else
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#define TOO_LONG(n) 0
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#endif
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#define RUBY_GDBM_RW_BIT 0x20000000
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#define MY_BLOCK_SIZE (2048)
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#define MY_FATAL_FUNC rb_gdbm_fatal
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static void
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rb_gdbm_fatal(const char *msg)
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{
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rb_raise(rb_eGDBMFatalError, "%s", msg);
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}
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struct dbmdata {
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int di_size;
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GDBM_FILE di_dbm;
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};
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static void
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closed_dbm(void)
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{
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rb_raise(rb_eRuntimeError, "closed GDBM file");
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}
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#define GetDBM(obj, dbmp) do {\
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TypedData_Get_Struct((obj), struct dbmdata, &dbm_type, (dbmp));\
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if ((dbmp) == 0) closed_dbm();\
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if ((dbmp)->di_dbm == 0) closed_dbm();\
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} while (0)
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#define GetDBM2(obj, dbmp, dbm) do {\
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GetDBM((obj), (dbmp));\
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(dbm) = (dbmp)->di_dbm;\
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} while (0)
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static void
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free_dbm(void *ptr)
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{
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struct dbmdata *dbmp = ptr;
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if (dbmp) {
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if (dbmp->di_dbm) gdbm_close(dbmp->di_dbm);
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xfree(dbmp);
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}
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}
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static size_t
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memsize_dbm(const void *ptr)
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{
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size_t size = 0;
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const struct dbmdata *dbmp = ptr;
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if (dbmp) {
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size += sizeof(*dbmp);
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if (dbmp->di_dbm) size += DBM_SIZEOF_DBM;
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}
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return size;
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}
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static const rb_data_type_t dbm_type = {
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"gdbm",
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{0, free_dbm, memsize_dbm,},
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0, 0,
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RUBY_TYPED_FREE_IMMEDIATELY,
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};
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/*
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* call-seq:
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* gdbm.close -> nil
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*
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* Closes the associated database file.
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*/
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static VALUE
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fgdbm_close(VALUE obj)
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{
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struct dbmdata *dbmp;
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GetDBM(obj, dbmp);
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gdbm_close(dbmp->di_dbm);
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dbmp->di_dbm = 0;
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return Qnil;
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}
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/*
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* call-seq:
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* gdbm.closed? -> true or false
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*
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* Returns true if the associated database file has been closed.
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*/
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static VALUE
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fgdbm_closed(VALUE obj)
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{
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struct dbmdata *dbmp;
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TypedData_Get_Struct(obj, struct dbmdata, &dbm_type, dbmp);
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if (dbmp == 0)
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return Qtrue;
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if (dbmp->di_dbm == 0)
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return Qtrue;
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return Qfalse;
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}
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static VALUE
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fgdbm_s_alloc(VALUE klass)
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{
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return TypedData_Wrap_Struct(klass, &dbm_type, 0);
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}
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/*
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* call-seq:
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* GDBM.new(filename, mode = 0666, flags = nil)
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*
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* Creates a new GDBM instance by opening a gdbm file named _filename_.
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* If the file does not exist, a new file with file mode _mode_ will be
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* created. _flags_ may be one of the following:
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* * *READER* - open as a reader
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* * *WRITER* - open as a writer
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* * *WRCREAT* - open as a writer; if the database does not exist, create a new one
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* * *NEWDB* - open as a writer; overwrite any existing databases
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*
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* The values *WRITER*, *WRCREAT* and *NEWDB* may be combined with the following
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* values by bitwise or:
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* * *SYNC* - cause all database operations to be synchronized to the disk
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* * *NOLOCK* - do not lock the database file
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*
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* If no _flags_ are specified, the GDBM object will try to open the database
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* file as a writer and will create it if it does not already exist
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* (cf. flag <tt>WRCREAT</tt>). If this fails (for instance, if another process
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* has already opened the database as a reader), it will try to open the
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* database file as a reader (cf. flag <tt>READER</tt>).
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*/
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static VALUE
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fgdbm_initialize(int argc, VALUE *argv, VALUE obj)
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{
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VALUE file, vmode, vflags;
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GDBM_FILE dbm;
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struct dbmdata *dbmp;
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int mode, flags = 0;
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if (rb_scan_args(argc, argv, "12", &file, &vmode, &vflags) == 1) {
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mode = 0666; /* default value */
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}
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else if (NIL_P(vmode)) {
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mode = -1; /* return nil if DB does not exist */
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}
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else {
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mode = NUM2INT(vmode);
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}
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if (!NIL_P(vflags))
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flags = NUM2INT(vflags);
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SafeStringValue(file);
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#ifdef GDBM_CLOEXEC
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/* GDBM_CLOEXEC is available since gdbm 1.10. */
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flags |= GDBM_CLOEXEC;
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#endif
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if (flags & RUBY_GDBM_RW_BIT) {
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flags &= ~RUBY_GDBM_RW_BIT;
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dbm = gdbm_open(RSTRING_PTR(file), MY_BLOCK_SIZE,
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flags, mode, MY_FATAL_FUNC);
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}
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else {
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dbm = 0;
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if (mode >= 0)
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dbm = gdbm_open(RSTRING_PTR(file), MY_BLOCK_SIZE,
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GDBM_WRCREAT|flags, mode, MY_FATAL_FUNC);
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if (!dbm)
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dbm = gdbm_open(RSTRING_PTR(file), MY_BLOCK_SIZE,
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GDBM_WRITER|flags, 0, MY_FATAL_FUNC);
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if (!dbm)
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dbm = gdbm_open(RSTRING_PTR(file), MY_BLOCK_SIZE,
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GDBM_READER|flags, 0, MY_FATAL_FUNC);
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}
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if (dbm) {
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rb_fd_fix_cloexec(gdbm_fdesc(dbm));
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}
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if (!dbm) {
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if (mode == -1) return Qnil;
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if (gdbm_errno == GDBM_FILE_OPEN_ERROR ||
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gdbm_errno == GDBM_CANT_BE_READER ||
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gdbm_errno == GDBM_CANT_BE_WRITER)
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rb_sys_fail_str(file);
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else
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rb_raise(rb_eGDBMError, "%s", gdbm_strerror(gdbm_errno));
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}
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dbmp = ALLOC(struct dbmdata);
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free_dbm(DATA_PTR(obj));
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DATA_PTR(obj) = dbmp;
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dbmp->di_dbm = dbm;
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dbmp->di_size = -1;
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return obj;
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}
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/*
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* call-seq:
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* GDBM.open(filename, mode = 0666, flags = nil)
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* GDBM.open(filename, mode = 0666, flags = nil) { |gdbm| ... }
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*
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* If called without a block, this is synonymous to GDBM::new.
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* If a block is given, the new GDBM instance will be passed to the block
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* as a parameter, and the corresponding database file will be closed
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* after the execution of the block code has been finished.
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*
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* Example for an open call with a block:
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*
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* require 'gdbm'
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* GDBM.open("fruitstore.db") do |gdbm|
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* gdbm.each_pair do |key, value|
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* print "#{key}: #{value}\n"
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* end
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* end
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*/
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static VALUE
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fgdbm_s_open(int argc, VALUE *argv, VALUE klass)
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{
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VALUE obj = fgdbm_s_alloc(klass);
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if (NIL_P(fgdbm_initialize(argc, argv, obj))) {
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return Qnil;
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}
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if (rb_block_given_p()) {
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return rb_ensure(rb_yield, obj, fgdbm_close, obj);
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}
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return obj;
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}
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static VALUE
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rb_gdbm_fetch(GDBM_FILE dbm, datum key)
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{
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datum val;
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VALUE str;
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val = gdbm_fetch(dbm, key);
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if (val.dptr == 0)
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return Qnil;
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str = rb_str_new(val.dptr, val.dsize);
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free(val.dptr);
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OBJ_TAINT(str);
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return str;
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}
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static VALUE
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rb_gdbm_fetch2(GDBM_FILE dbm, VALUE keystr)
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{
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datum key;
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long len;
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StringValue(keystr);
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len = RSTRING_LEN(keystr);
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if (TOO_LONG(len)) return Qnil;
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key.dptr = RSTRING_PTR(keystr);
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key.dsize = (int)len;
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return rb_gdbm_fetch(dbm, key);
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}
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static VALUE
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rb_gdbm_fetch3(VALUE obj, VALUE keystr)
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{
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struct dbmdata *dbmp;
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GDBM_FILE dbm;
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GetDBM2(obj, dbmp, dbm);
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return rb_gdbm_fetch2(dbm, keystr);
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}
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static VALUE
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rb_gdbm_firstkey(GDBM_FILE dbm)
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{
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datum key;
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VALUE str;
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key = gdbm_firstkey(dbm);
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if (key.dptr == 0)
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return Qnil;
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str = rb_str_new(key.dptr, key.dsize);
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free(key.dptr);
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OBJ_TAINT(str);
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return str;
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}
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static VALUE
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rb_gdbm_nextkey(GDBM_FILE dbm, VALUE keystr)
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{
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datum key, key2;
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VALUE str;
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long len;
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len = RSTRING_LEN(keystr);
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if (TOO_LONG(len)) return Qnil;
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key.dptr = RSTRING_PTR(keystr);
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key.dsize = (int)len;
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key2 = gdbm_nextkey(dbm, key);
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if (key2.dptr == 0)
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return Qnil;
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str = rb_str_new(key2.dptr, key2.dsize);
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free(key2.dptr);
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OBJ_TAINT(str);
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return str;
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}
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static VALUE
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fgdbm_fetch(VALUE obj, VALUE keystr, VALUE ifnone)
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{
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VALUE valstr;
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valstr = rb_gdbm_fetch3(obj, keystr);
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if (NIL_P(valstr)) {
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if (ifnone == Qnil && rb_block_given_p())
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return rb_yield(keystr);
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return ifnone;
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}
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return valstr;
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}
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/*
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* call-seq:
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* gdbm[key] -> value
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*
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* Retrieves the _value_ corresponding to _key_.
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*/
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static VALUE
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fgdbm_aref(VALUE obj, VALUE keystr)
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{
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return rb_gdbm_fetch3(obj, keystr);
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}
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/*
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* call-seq:
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* gdbm.fetch(key [, default]) -> value
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*
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* Retrieves the _value_ corresponding to _key_. If there is no value
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* associated with _key_, _default_ will be returned instead.
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*/
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static VALUE
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fgdbm_fetch_m(int argc, VALUE *argv, VALUE obj)
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{
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VALUE keystr, valstr, ifnone;
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rb_scan_args(argc, argv, "11", &keystr, &ifnone);
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valstr = fgdbm_fetch(obj, keystr, ifnone);
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if (argc == 1 && !rb_block_given_p() && NIL_P(valstr))
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rb_raise(rb_eIndexError, "key not found");
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return valstr;
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}
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/*
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* call-seq:
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* gdbm.key(value) -> key
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*
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* Returns the _key_ for a given _value_. If several keys may map to the
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* same value, the key that is found first will be returned.
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*/
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static VALUE
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fgdbm_key(VALUE obj, VALUE valstr)
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{
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struct dbmdata *dbmp;
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GDBM_FILE dbm;
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VALUE keystr, valstr2;
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StringValue(valstr);
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GetDBM2(obj, dbmp, dbm);
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for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
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keystr = rb_gdbm_nextkey(dbm, keystr)) {
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valstr2 = rb_gdbm_fetch2(dbm, keystr);
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if (!NIL_P(valstr2) &&
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(int)RSTRING_LEN(valstr) == (int)RSTRING_LEN(valstr2) &&
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memcmp(RSTRING_PTR(valstr), RSTRING_PTR(valstr2),
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(int)RSTRING_LEN(valstr)) == 0) {
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return keystr;
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}
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}
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return Qnil;
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}
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/* :nodoc: */
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static VALUE
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fgdbm_index(VALUE obj, VALUE value)
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{
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rb_warn("GDBM#index is deprecated; use GDBM#key");
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return fgdbm_key(obj, value);
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}
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/*
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* call-seq:
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* gdbm.select { |key, value| block } -> array
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*
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* Returns a new array of all key-value pairs of the database for which _block_
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* evaluates to true.
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*/
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static VALUE
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fgdbm_select(VALUE obj)
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{
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VALUE new = rb_ary_new();
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GDBM_FILE dbm;
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struct dbmdata *dbmp;
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VALUE keystr;
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GetDBM2(obj, dbmp, dbm);
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for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
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keystr = rb_gdbm_nextkey(dbm, keystr)) {
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VALUE assoc = rb_assoc_new(keystr, rb_gdbm_fetch2(dbm, keystr));
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VALUE v = rb_yield(assoc);
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if (RTEST(v)) {
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rb_ary_push(new, assoc);
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}
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GetDBM2(obj, dbmp, dbm);
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}
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return new;
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}
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/*
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* call-seq:
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* gdbm.values_at(key, ...) -> array
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*
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* Returns an array of the values associated with each specified _key_.
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*/
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static VALUE
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fgdbm_values_at(int argc, VALUE *argv, VALUE obj)
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{
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VALUE new = rb_ary_new2(argc);
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int i;
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for (i=0; i<argc; i++) {
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rb_ary_push(new, rb_gdbm_fetch3(obj, argv[i]));
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}
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return new;
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}
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static void
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rb_gdbm_modify(VALUE obj)
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{
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if (OBJ_FROZEN(obj)) rb_error_frozen("GDBM");
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}
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static VALUE
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rb_gdbm_delete(VALUE obj, VALUE keystr)
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{
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datum key;
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struct dbmdata *dbmp;
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GDBM_FILE dbm;
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long len;
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|
|
|
rb_gdbm_modify(obj);
|
|
StringValue(keystr);
|
|
len = RSTRING_LEN(keystr);
|
|
if (TOO_LONG(len)) return Qnil;
|
|
key.dptr = RSTRING_PTR(keystr);
|
|
key.dsize = (int)len;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
if (!gdbm_exists(dbm, key)) {
|
|
return Qnil;
|
|
}
|
|
|
|
if (gdbm_delete(dbm, key)) {
|
|
dbmp->di_size = -1;
|
|
rb_raise(rb_eGDBMError, "%s", gdbm_strerror(gdbm_errno));
|
|
}
|
|
else if (dbmp->di_size >= 0) {
|
|
dbmp->di_size--;
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.delete(key) -> value or nil
|
|
*
|
|
* Removes the key-value-pair with the specified _key_ from this database and
|
|
* returns the corresponding _value_. Returns nil if the database is empty.
|
|
*/
|
|
static VALUE
|
|
fgdbm_delete(VALUE obj, VALUE keystr)
|
|
{
|
|
VALUE valstr;
|
|
|
|
valstr = fgdbm_fetch(obj, keystr, Qnil);
|
|
rb_gdbm_delete(obj, keystr);
|
|
return valstr;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.shift -> (key, value) or nil
|
|
*
|
|
* Removes a key-value-pair from this database and returns it as a
|
|
* two-item array [ _key_, _value_ ]. Returns nil if the database is empty.
|
|
*/
|
|
static VALUE
|
|
fgdbm_shift(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr, valstr;
|
|
|
|
rb_gdbm_modify(obj);
|
|
GetDBM2(obj, dbmp, dbm);
|
|
keystr = rb_gdbm_firstkey(dbm);
|
|
if (NIL_P(keystr)) return Qnil;
|
|
valstr = rb_gdbm_fetch2(dbm, keystr);
|
|
rb_gdbm_delete(obj, keystr);
|
|
|
|
return rb_assoc_new(keystr, valstr);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.delete_if { |key, value| block } -> gdbm
|
|
* gdbm.reject! { |key, value| block } -> gdbm
|
|
*
|
|
* Deletes every key-value pair from _gdbm_ for which _block_ evaluates to true.
|
|
*/
|
|
static VALUE
|
|
fgdbm_delete_if(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr, valstr;
|
|
VALUE ret, ary = rb_ary_tmp_new(0);
|
|
int i, status = 0, n;
|
|
|
|
rb_gdbm_modify(obj);
|
|
GetDBM2(obj, dbmp, dbm);
|
|
n = dbmp->di_size;
|
|
dbmp->di_size = -1;
|
|
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
|
|
OBJ_FREEZE(keystr);
|
|
valstr = rb_gdbm_fetch2(dbm, keystr);
|
|
ret = rb_protect(rb_yield, rb_assoc_new(rb_str_dup(keystr), valstr), &status);
|
|
if (status != 0) break;
|
|
if (RTEST(ret)) rb_ary_push(ary, keystr);
|
|
GetDBM2(obj, dbmp, dbm);
|
|
}
|
|
|
|
for (i = 0; i < RARRAY_LEN(ary); i++)
|
|
rb_gdbm_delete(obj, RARRAY_PTR(ary)[i]);
|
|
if (status) rb_jump_tag(status);
|
|
if (n > 0) dbmp->di_size = n - (int)RARRAY_LEN(ary);
|
|
rb_ary_clear(ary);
|
|
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.clear -> gdbm
|
|
*
|
|
* Removes all the key-value pairs within _gdbm_.
|
|
*/
|
|
static VALUE
|
|
fgdbm_clear(VALUE obj)
|
|
{
|
|
datum key, nextkey;
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
|
|
rb_gdbm_modify(obj);
|
|
GetDBM2(obj, dbmp, dbm);
|
|
dbmp->di_size = -1;
|
|
|
|
#if 0
|
|
while (key = gdbm_firstkey(dbm), key.dptr) {
|
|
if (gdbm_delete(dbm, key)) {
|
|
free(key.dptr);
|
|
rb_raise(rb_eGDBMError, "%s", gdbm_strerror(gdbm_errno));
|
|
}
|
|
free(key.dptr);
|
|
}
|
|
#else
|
|
while (key = gdbm_firstkey(dbm), key.dptr) {
|
|
for (; key.dptr; key = nextkey) {
|
|
nextkey = gdbm_nextkey(dbm, key);
|
|
if (gdbm_delete(dbm, key)) {
|
|
free(key.dptr);
|
|
if (nextkey.dptr) free(nextkey.dptr);
|
|
rb_raise(rb_eGDBMError, "%s", gdbm_strerror(gdbm_errno));
|
|
}
|
|
free(key.dptr);
|
|
}
|
|
}
|
|
#endif
|
|
dbmp->di_size = 0;
|
|
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.invert -> hash
|
|
*
|
|
* Returns a hash created by using _gdbm_'s values as keys, and the keys
|
|
* as values.
|
|
*/
|
|
static VALUE
|
|
fgdbm_invert(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr, valstr;
|
|
VALUE hash = rb_hash_new();
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
valstr = rb_gdbm_fetch2(dbm, keystr);
|
|
|
|
rb_hash_aset(hash, valstr, keystr);
|
|
}
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm[key]= value -> value
|
|
* gdbm.store(key, value) -> value
|
|
*
|
|
* Associates the value _value_ with the specified _key_.
|
|
*/
|
|
static VALUE
|
|
fgdbm_store(VALUE obj, VALUE keystr, VALUE valstr)
|
|
{
|
|
datum key, val;
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
|
|
rb_gdbm_modify(obj);
|
|
StringValue(keystr);
|
|
StringValue(valstr);
|
|
|
|
key.dptr = RSTRING_PTR(keystr);
|
|
key.dsize = RSTRING_LENINT(keystr);
|
|
|
|
val.dptr = RSTRING_PTR(valstr);
|
|
val.dsize = RSTRING_LENINT(valstr);
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
dbmp->di_size = -1;
|
|
if (gdbm_store(dbm, key, val, GDBM_REPLACE)) {
|
|
if (errno == EPERM) rb_sys_fail(0);
|
|
rb_raise(rb_eGDBMError, "%s", gdbm_strerror(gdbm_errno));
|
|
}
|
|
|
|
return valstr;
|
|
}
|
|
|
|
static VALUE
|
|
update_i(RB_BLOCK_CALL_FUNC_ARGLIST(pair, dbm))
|
|
{
|
|
Check_Type(pair, T_ARRAY);
|
|
if (RARRAY_LEN(pair) < 2) {
|
|
rb_raise(rb_eArgError, "pair must be [key, value]");
|
|
}
|
|
fgdbm_store(dbm, RARRAY_PTR(pair)[0], RARRAY_PTR(pair)[1]);
|
|
return Qnil;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.update(other) -> gdbm
|
|
*
|
|
* Adds the key-value pairs of _other_ to _gdbm_, overwriting entries with
|
|
* duplicate keys with those from _other_. _other_ must have an each_pair
|
|
* method.
|
|
*/
|
|
static VALUE
|
|
fgdbm_update(VALUE obj, VALUE other)
|
|
{
|
|
rb_block_call(other, rb_intern("each_pair"), 0, 0, update_i, obj);
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.replace(other) -> gdbm
|
|
*
|
|
* Replaces the content of _gdbm_ with the key-value pairs of _other_.
|
|
* _other_ must have an each_pair method.
|
|
*/
|
|
static VALUE
|
|
fgdbm_replace(VALUE obj, VALUE other)
|
|
{
|
|
fgdbm_clear(obj);
|
|
rb_block_call(other, rb_intern("each_pair"), 0, 0, update_i, obj);
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.length -> fixnum
|
|
* gdbm.size -> fixnum
|
|
*
|
|
* Returns the number of key-value pairs in this database.
|
|
*/
|
|
static VALUE
|
|
fgdbm_length(VALUE obj)
|
|
{
|
|
datum key, nextkey;
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
int i = 0;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
if (dbmp->di_size > 0) return INT2FIX(dbmp->di_size);
|
|
|
|
for (key = gdbm_firstkey(dbm); key.dptr; key = nextkey) {
|
|
nextkey = gdbm_nextkey(dbm, key);
|
|
free(key.dptr);
|
|
i++;
|
|
}
|
|
dbmp->di_size = i;
|
|
|
|
return INT2FIX(i);
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.empty? -> true or false
|
|
*
|
|
* Returns true if the database is empty.
|
|
*/
|
|
static VALUE
|
|
fgdbm_empty_p(VALUE obj)
|
|
{
|
|
datum key;
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
|
|
GetDBM(obj, dbmp);
|
|
if (dbmp->di_size < 0) {
|
|
dbm = dbmp->di_dbm;
|
|
|
|
key = gdbm_firstkey(dbm);
|
|
if (key.dptr) {
|
|
free(key.dptr);
|
|
return Qfalse;
|
|
}
|
|
return Qtrue;
|
|
}
|
|
|
|
if (dbmp->di_size == 0) return Qtrue;
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.each_value { |value| block } -> gdbm
|
|
*
|
|
* Executes _block_ for each key in the database, passing the corresponding
|
|
* _value_ as a parameter.
|
|
*/
|
|
static VALUE
|
|
fgdbm_each_value(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr;
|
|
|
|
RETURN_ENUMERATOR(obj, 0, 0);
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
|
|
rb_yield(rb_gdbm_fetch2(dbm, keystr));
|
|
GetDBM2(obj, dbmp, dbm);
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.each_key { |key| block } -> gdbm
|
|
*
|
|
* Executes _block_ for each key in the database, passing the
|
|
* _key_ as a parameter.
|
|
*/
|
|
static VALUE
|
|
fgdbm_each_key(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr;
|
|
|
|
RETURN_ENUMERATOR(obj, 0, 0);
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
|
|
rb_yield(keystr);
|
|
GetDBM2(obj, dbmp, dbm);
|
|
}
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.each_pair { |key, value| block } -> gdbm
|
|
*
|
|
* Executes _block_ for each key in the database, passing the _key_ and the
|
|
* corresponding _value_ as a parameter.
|
|
*/
|
|
static VALUE
|
|
fgdbm_each_pair(VALUE obj)
|
|
{
|
|
GDBM_FILE dbm;
|
|
struct dbmdata *dbmp;
|
|
VALUE keystr;
|
|
|
|
RETURN_ENUMERATOR(obj, 0, 0);
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
|
|
rb_yield(rb_assoc_new(keystr, rb_gdbm_fetch2(dbm, keystr)));
|
|
GetDBM2(obj, dbmp, dbm);
|
|
}
|
|
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.keys -> array
|
|
*
|
|
* Returns an array of all keys of this database.
|
|
*/
|
|
static VALUE
|
|
fgdbm_keys(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr, ary;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
ary = rb_ary_new();
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
|
|
rb_ary_push(ary, keystr);
|
|
}
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.values -> array
|
|
*
|
|
* Returns an array of all values of this database.
|
|
*/
|
|
static VALUE
|
|
fgdbm_values(VALUE obj)
|
|
{
|
|
datum key, nextkey;
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE valstr, ary;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
ary = rb_ary_new();
|
|
for (key = gdbm_firstkey(dbm); key.dptr; key = nextkey) {
|
|
nextkey = gdbm_nextkey(dbm, key);
|
|
valstr = rb_gdbm_fetch(dbm, key);
|
|
free(key.dptr);
|
|
rb_ary_push(ary, valstr);
|
|
}
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.include?(k) -> true or false
|
|
* gdbm.has_key?(k) -> true or false
|
|
* gdbm.member?(k) -> true or false
|
|
* gdbm.key?(k) -> true or false
|
|
*
|
|
* Returns true if the given key _k_ exists within the database.
|
|
* Returns false otherwise.
|
|
*/
|
|
static VALUE
|
|
fgdbm_has_key(VALUE obj, VALUE keystr)
|
|
{
|
|
datum key;
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
long len;
|
|
|
|
StringValue(keystr);
|
|
len = RSTRING_LENINT(keystr);
|
|
if (TOO_LONG(len)) return Qfalse;
|
|
key.dptr = RSTRING_PTR(keystr);
|
|
key.dsize = (int)len;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
if (gdbm_exists(dbm, key))
|
|
return Qtrue;
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.has_value?(v) -> true or false
|
|
* gdbm.value?(v) -> true or false
|
|
*
|
|
* Returns true if the given value _v_ exists within the database.
|
|
* Returns false otherwise.
|
|
*/
|
|
static VALUE
|
|
fgdbm_has_value(VALUE obj, VALUE valstr)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr, valstr2;
|
|
|
|
StringValue(valstr);
|
|
GetDBM2(obj, dbmp, dbm);
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
|
|
valstr2 = rb_gdbm_fetch2(dbm, keystr);
|
|
|
|
if (!NIL_P(valstr2) &&
|
|
(int)RSTRING_LEN(valstr) == (int)RSTRING_LEN(valstr2) &&
|
|
memcmp(RSTRING_PTR(valstr), RSTRING_PTR(valstr2),
|
|
(int)RSTRING_LEN(valstr)) == 0) {
|
|
return Qtrue;
|
|
}
|
|
}
|
|
return Qfalse;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.to_a -> array
|
|
*
|
|
* Returns an array of all key-value pairs contained in the database.
|
|
*/
|
|
static VALUE
|
|
fgdbm_to_a(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr, ary;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
ary = rb_ary_new();
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
|
|
rb_ary_push(ary, rb_assoc_new(keystr, rb_gdbm_fetch2(dbm, keystr)));
|
|
}
|
|
|
|
return ary;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.reorganize -> gdbm
|
|
*
|
|
* Reorganizes the database file. This operation removes reserved space of
|
|
* elements that have already been deleted. It is only useful after a lot of
|
|
* deletions in the database.
|
|
*/
|
|
static VALUE
|
|
fgdbm_reorganize(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
|
|
rb_gdbm_modify(obj);
|
|
GetDBM2(obj, dbmp, dbm);
|
|
gdbm_reorganize(dbm);
|
|
rb_fd_fix_cloexec(gdbm_fdesc(dbm));
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.sync -> gdbm
|
|
*
|
|
* Unless the _gdbm_ object has been opened with the *SYNC* flag, it is not
|
|
* guaranteed that database modification operations are immediately applied to
|
|
* the database file. This method ensures that all recent modifications
|
|
* to the database are written to the file. Blocks until all writing operations
|
|
* to the disk have been finished.
|
|
*/
|
|
static VALUE
|
|
fgdbm_sync(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
|
|
rb_gdbm_modify(obj);
|
|
GetDBM2(obj, dbmp, dbm);
|
|
gdbm_sync(dbm);
|
|
return obj;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.cachesize = size -> size
|
|
*
|
|
* Sets the size of the internal bucket cache to _size_.
|
|
*/
|
|
static VALUE
|
|
fgdbm_set_cachesize(VALUE obj, VALUE val)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
int optval;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
optval = FIX2INT(val);
|
|
if (gdbm_setopt(dbm, GDBM_CACHESIZE, &optval, sizeof(optval)) == -1) {
|
|
rb_raise(rb_eGDBMError, "%s", gdbm_strerror(gdbm_errno));
|
|
}
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.fastmode = boolean -> boolean
|
|
*
|
|
* Turns the database's fast mode on or off. If fast mode is turned on, gdbm
|
|
* does not wait for writes to be flushed to the disk before continuing.
|
|
*
|
|
* This option is obsolete for gdbm >= 1.8 since fast mode is turned on by
|
|
* default. See also: #syncmode=
|
|
*/
|
|
static VALUE
|
|
fgdbm_set_fastmode(VALUE obj, VALUE val)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
int optval;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
optval = 0;
|
|
if (RTEST(val))
|
|
optval = 1;
|
|
|
|
if (gdbm_setopt(dbm, GDBM_FASTMODE, &optval, sizeof(optval)) == -1) {
|
|
rb_raise(rb_eGDBMError, "%s", gdbm_strerror(gdbm_errno));
|
|
}
|
|
return val;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.syncmode = boolean -> boolean
|
|
*
|
|
* Turns the database's synchronization mode on or off. If the synchronization
|
|
* mode is turned on, the database's in-memory state will be synchronized to
|
|
* disk after every database modification operation. If the synchronization
|
|
* mode is turned off, GDBM does not wait for writes to be flushed to the disk
|
|
* before continuing.
|
|
*
|
|
* This option is only available for gdbm >= 1.8 where syncmode is turned off
|
|
* by default. See also: #fastmode=
|
|
*/
|
|
static VALUE
|
|
fgdbm_set_syncmode(VALUE obj, VALUE val)
|
|
{
|
|
#if !defined(GDBM_SYNCMODE)
|
|
fgdbm_set_fastmode(obj, RTEST(val) ? Qfalse : Qtrue);
|
|
return val;
|
|
#else
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
int optval;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
optval = 0;
|
|
if (RTEST(val))
|
|
optval = 1;
|
|
|
|
if (gdbm_setopt(dbm, GDBM_FASTMODE, &optval, sizeof(optval)) == -1) {
|
|
rb_raise(rb_eGDBMError, "%s", gdbm_strerror(gdbm_errno));
|
|
}
|
|
return val;
|
|
#endif
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.to_hash -> hash
|
|
*
|
|
* Returns a hash of all key-value pairs contained in the database.
|
|
*/
|
|
static VALUE
|
|
fgdbm_to_hash(VALUE obj)
|
|
{
|
|
struct dbmdata *dbmp;
|
|
GDBM_FILE dbm;
|
|
VALUE keystr, hash;
|
|
|
|
GetDBM2(obj, dbmp, dbm);
|
|
hash = rb_hash_new();
|
|
for (keystr = rb_gdbm_firstkey(dbm); RTEST(keystr);
|
|
keystr = rb_gdbm_nextkey(dbm, keystr)) {
|
|
|
|
rb_hash_aset(hash, keystr, rb_gdbm_fetch2(dbm, keystr));
|
|
}
|
|
|
|
return hash;
|
|
}
|
|
|
|
/*
|
|
* call-seq:
|
|
* gdbm.reject { |key, value| block } -> hash
|
|
*
|
|
* Returns a hash copy of _gdbm_ where all key-value pairs from _gdbm_ for
|
|
* which _block_ evaluates to true are removed. See also: #delete_if
|
|
*/
|
|
static VALUE
|
|
fgdbm_reject(VALUE obj)
|
|
{
|
|
return rb_hash_delete_if(fgdbm_to_hash(obj));
|
|
}
|
|
|
|
void
|
|
Init_gdbm(void)
|
|
{
|
|
rb_cGDBM = rb_define_class("GDBM", rb_cObject);
|
|
rb_eGDBMError = rb_define_class("GDBMError", rb_eStandardError);
|
|
rb_eGDBMFatalError = rb_define_class("GDBMFatalError", rb_eException);
|
|
rb_include_module(rb_cGDBM, rb_mEnumerable);
|
|
|
|
rb_define_alloc_func(rb_cGDBM, fgdbm_s_alloc);
|
|
rb_define_singleton_method(rb_cGDBM, "open", fgdbm_s_open, -1);
|
|
|
|
rb_define_method(rb_cGDBM, "initialize", fgdbm_initialize, -1);
|
|
rb_define_method(rb_cGDBM, "close", fgdbm_close, 0);
|
|
rb_define_method(rb_cGDBM, "closed?", fgdbm_closed, 0);
|
|
rb_define_method(rb_cGDBM, "[]", fgdbm_aref, 1);
|
|
rb_define_method(rb_cGDBM, "fetch", fgdbm_fetch_m, -1);
|
|
rb_define_method(rb_cGDBM, "[]=", fgdbm_store, 2);
|
|
rb_define_method(rb_cGDBM, "store", fgdbm_store, 2);
|
|
rb_define_method(rb_cGDBM, "index", fgdbm_index, 1);
|
|
rb_define_method(rb_cGDBM, "key", fgdbm_key, 1);
|
|
rb_define_method(rb_cGDBM, "select", fgdbm_select, 0);
|
|
rb_define_method(rb_cGDBM, "values_at", fgdbm_values_at, -1);
|
|
rb_define_method(rb_cGDBM, "length", fgdbm_length, 0);
|
|
rb_define_method(rb_cGDBM, "size", fgdbm_length, 0);
|
|
rb_define_method(rb_cGDBM, "empty?", fgdbm_empty_p, 0);
|
|
rb_define_method(rb_cGDBM, "each", fgdbm_each_pair, 0);
|
|
rb_define_method(rb_cGDBM, "each_value", fgdbm_each_value, 0);
|
|
rb_define_method(rb_cGDBM, "each_key", fgdbm_each_key, 0);
|
|
rb_define_method(rb_cGDBM, "each_pair", fgdbm_each_pair, 0);
|
|
rb_define_method(rb_cGDBM, "keys", fgdbm_keys, 0);
|
|
rb_define_method(rb_cGDBM, "values", fgdbm_values, 0);
|
|
rb_define_method(rb_cGDBM, "shift", fgdbm_shift, 0);
|
|
rb_define_method(rb_cGDBM, "delete", fgdbm_delete, 1);
|
|
rb_define_method(rb_cGDBM, "delete_if", fgdbm_delete_if, 0);
|
|
rb_define_method(rb_cGDBM, "reject!", fgdbm_delete_if, 0);
|
|
rb_define_method(rb_cGDBM, "reject", fgdbm_reject, 0);
|
|
rb_define_method(rb_cGDBM, "clear", fgdbm_clear, 0);
|
|
rb_define_method(rb_cGDBM, "invert", fgdbm_invert, 0);
|
|
rb_define_method(rb_cGDBM, "update", fgdbm_update, 1);
|
|
rb_define_method(rb_cGDBM, "replace", fgdbm_replace, 1);
|
|
rb_define_method(rb_cGDBM, "reorganize", fgdbm_reorganize, 0);
|
|
rb_define_method(rb_cGDBM, "sync", fgdbm_sync, 0);
|
|
/* rb_define_method(rb_cGDBM, "setopt", fgdbm_setopt, 2); */
|
|
rb_define_method(rb_cGDBM, "cachesize=", fgdbm_set_cachesize, 1);
|
|
rb_define_method(rb_cGDBM, "fastmode=", fgdbm_set_fastmode, 1);
|
|
rb_define_method(rb_cGDBM, "syncmode=", fgdbm_set_syncmode, 1);
|
|
|
|
rb_define_method(rb_cGDBM, "include?", fgdbm_has_key, 1);
|
|
rb_define_method(rb_cGDBM, "has_key?", fgdbm_has_key, 1);
|
|
rb_define_method(rb_cGDBM, "member?", fgdbm_has_key, 1);
|
|
rb_define_method(rb_cGDBM, "has_value?", fgdbm_has_value, 1);
|
|
rb_define_method(rb_cGDBM, "key?", fgdbm_has_key, 1);
|
|
rb_define_method(rb_cGDBM, "value?", fgdbm_has_value, 1);
|
|
|
|
rb_define_method(rb_cGDBM, "to_a", fgdbm_to_a, 0);
|
|
rb_define_method(rb_cGDBM, "to_hash", fgdbm_to_hash, 0);
|
|
|
|
/* flag for #new and #open: open database as a reader */
|
|
rb_define_const(rb_cGDBM, "READER", INT2FIX(GDBM_READER|RUBY_GDBM_RW_BIT));
|
|
/* flag for #new and #open: open database as a writer */
|
|
rb_define_const(rb_cGDBM, "WRITER", INT2FIX(GDBM_WRITER|RUBY_GDBM_RW_BIT));
|
|
/* flag for #new and #open: open database as a writer; if the database does not exist, create a new one */
|
|
rb_define_const(rb_cGDBM, "WRCREAT", INT2FIX(GDBM_WRCREAT|RUBY_GDBM_RW_BIT));
|
|
/* flag for #new and #open: open database as a writer; overwrite any existing databases */
|
|
rb_define_const(rb_cGDBM, "NEWDB", INT2FIX(GDBM_NEWDB|RUBY_GDBM_RW_BIT));
|
|
|
|
/* flag for #new and #open. this flag is obsolete for gdbm >= 1.8 */
|
|
rb_define_const(rb_cGDBM, "FAST", INT2FIX(GDBM_FAST));
|
|
/* this flag is obsolete in gdbm 1.8.
|
|
On gdbm 1.8, fast mode is default behavior. */
|
|
|
|
/* gdbm version 1.8 specific */
|
|
#if defined(GDBM_SYNC)
|
|
/* flag for #new and #open. only for gdbm >= 1.8 */
|
|
rb_define_const(rb_cGDBM, "SYNC", INT2FIX(GDBM_SYNC));
|
|
#endif
|
|
#if defined(GDBM_NOLOCK)
|
|
/* flag for #new and #open */
|
|
rb_define_const(rb_cGDBM, "NOLOCK", INT2FIX(GDBM_NOLOCK));
|
|
#endif
|
|
/* version of the gdbm library*/
|
|
rb_define_const(rb_cGDBM, "VERSION", rb_str_new2(gdbm_version));
|
|
}
|