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Doc strings added by Mitch Chapman. 

Also got rid of some inconsistent change log comments near the top.
This commit is contained in:
Guido van Rossum 1998-03-03 22:02:24 +00:00
parent 6659c30b67
commit bfc49e8c75
1 changed files with 107 additions and 19 deletions
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126
Modules/gdbmmodule.c
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@ -1,7 +1,3 @@
/* GDBM module, hacked from the still-breathing corpse of the
DBM module by anthony.baxter@aaii.oz.au. Original copyright
follows:
*/
/***********************************************************
Copyright 1991-1995 by Stichting Mathematisch Centrum, Amsterdam,
The Netherlands.
@ -32,13 +28,10 @@ TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
PERFORMANCE OF THIS SOFTWARE.
******************************************************************/
/*****************************************************************
Modification History:
Added support for 'gdbm_sync' method. Roger E. Masse 3/25/97
*****************************************************************/
/* DBM module using dictionary interface */
/* Author: Anthony Baxter, after dbmmodule.c */
/* Doc strings: Mitch Chapman */
#include "Python.h"
@ -48,6 +41,18 @@ PERFORMANCE OF THIS SOFTWARE.
#include <fcntl.h>
#include "gdbm.h"
static char gdbmmodule__doc__[] = "\
This module provides an interface to the GNU DBM (GDBM) library.\n\
\n\
This module is quite similar to the dbm module, but uses GDBM instead to\n\
provide some additional functionality. Please note that the file formats\n\
created by GDBM and dbm are incompatible. \n\
\n\
GDBM objects behave like mappings (dictionaries), except that keys and\n\
values are always strings. Printing a GDBM object doesn't print the\n\
keys and values, and the items() and values() methods are not\n\
supported.";
typedef struct {
PyObject_HEAD
int di_size; /* -1 means recompute */
@ -65,6 +70,16 @@ staticforward PyTypeObject Dbmtype;
static PyObject *DbmError;
static char gdbm_object__doc__[] = "\
This object represents a GDBM database.\n\
GDBM objects behave like mappings (dictionaries), except that keys and\n\
values are always strings. Printing a GDBM object doesn't print the\n\
keys and values, and the items() and values() methods are not\n\
supported.\n\
\n\
GDBM objects also support additional operations such as firstkey,\n\
nextkey, reorganize, and sync.";
static PyObject *
newdbmobject(file, flags, mode)
char *file;
@ -196,6 +211,11 @@ static PyMappingMethods dbm_as_mapping = {
(objobjargproc)dbm_ass_sub, /*mp_ass_subscript*/
};
static char dbm_close__doc__[] = "\
close() -> None\n\
Closes the database.
";
static PyObject *
dbm_close(dp, args)
register dbmobject *dp;
@ -210,6 +230,10 @@ PyObject *args;
return Py_None;
}
static char dbm_keys__doc__[] = "\
keys() -> list_of_keys\n\
Get a list of all keys in the database.";
static PyObject *
dbm_keys(dp, args)
register dbmobject *dp;
@ -256,6 +280,10 @@ PyObject *args;
return v;
}
static char dbm_has_key__doc__[] = "\
has_key(key) -> boolean\n\
Find out whether or not the database contains a given key.";
static PyObject *
dbm_has_key(dp, args)
register dbmobject *dp;
@ -269,6 +297,13 @@ PyObject *args;
return PyInt_FromLong((long) gdbm_exists(dp->di_dbm, key));
}
static char dbm_firstkey__doc__[] = "\
firstkey() -> key\n\
It's possible to loop over every key in the database using this method\n\
and the nextkey() method. The traversal is ordered by GDBM's internal\n\
hash values, and won't be sorted by the key values. This method\n\
returns the starting key.";
static PyObject *
dbm_firstkey(dp, args)
register dbmobject *dp;
@ -291,6 +326,17 @@ PyObject *args;
}
}
static char dbm_nextkey__doc__[] = "\
nextkey(key) -> next_key\n\
Returns the key that follows key in the traversal.\n\
The following code prints every key in the database db, without having\n\
to create a list in memory that contains them all:\n\
\n\
k = db.firstkey()\n\
while k != None:\n\
print k\n\
k = db.nextkey(k)";
static PyObject *
dbm_nextkey(dp, args)
register dbmobject *dp;
@ -313,6 +359,14 @@ PyObject *args;
}
}
static char dbm_reorganize__doc__[] = "\
reorganize() -> None\n\
If you have carried out a lot of deletions and would like to shrink\n\
the space used by the GDBM file, this routine will reorganize the\n\
database. GDBM will not shorten the length of a database file except\n\
by using this reorganization; otherwise, deleted file space will be\n\
kept and reused as new (key,value) pairs are added.";
static PyObject *
dbm_reorganize(dp, args)
register dbmobject *dp;
@ -334,6 +388,11 @@ PyObject *args;
return Py_None;
}
static char dbm_sync__doc__[] = "\
sync() -> None\n\
When the database has been opened in fast mode, this method forces\n\
any unwritten data to be written to the disk.";
static PyObject *
dbm_sync(dp, args)
register dbmobject *dp;
@ -348,13 +407,13 @@ dbm_sync(dp, args)
}
static PyMethodDef dbm_methods[] = {
{"close", (PyCFunction)dbm_close},
{"keys", (PyCFunction)dbm_keys},
{"has_key", (PyCFunction)dbm_has_key},
{"firstkey", (PyCFunction)dbm_firstkey},
{"nextkey", (PyCFunction)dbm_nextkey},
{"reorganize", (PyCFunction)dbm_reorganize},
{"sync", (PyCFunction)dbm_sync},
{"close", (PyCFunction)dbm_close, 0, dbm_close__doc__},
{"keys", (PyCFunction)dbm_keys, 0, dbm_keys__doc__},
{"has_key", (PyCFunction)dbm_has_key, 0, dbm_has_key__doc__},
{"firstkey", (PyCFunction)dbm_firstkey, 0, dbm_firstkey__doc__},
{"nextkey", (PyCFunction)dbm_nextkey, 0, dbm_nextkey__doc__},
{"reorganize", (PyCFunction)dbm_reorganize, 0, dbm_reorganize__doc__},
{"sync", (PyCFunction)dbm_sync, 0, dbm_sync__doc__},
{NULL, NULL} /* sentinel */
};
@ -381,10 +440,38 @@ static PyTypeObject Dbmtype = {
0, /*tp_as_number*/
0, /*tp_as_sequence*/
&dbm_as_mapping, /*tp_as_mapping*/
0, /*tp_hash*/
0, /*tp_call*/
0, /*tp_str*/
0, /*tp_getattro*/
0, /*tp_setattro*/
0, /*tp_as_buffer*/
0, /*tp_xxx4*/
gdbm_object__doc__, /*tp_doc*/
};
/* ----------------------------------------------------------------- */
static char dbmopen__doc__[] = "\
open(filename, [flag, [mode]]) -> dbm_object\n\
Open a dbm database and return a dbm object. The filename argument is\n\
the name of the database file.\n\
\n\
The optional flag argument can be 'r' (to open an existing database\n\
for reading only -- default), 'w' (to open an existing database for\n\
reading and writing), 'c' (which creates the database if it doesn't\n\
exist), or 'n' (which always creates a new empty database).\n\
\n\
Appending f to the flag opens the database in fast mode; altered\n\
data will not automatically be written to the disk after every\n\
change. This results in faster writes to the database, but may\n\
result in an inconsistent database if the program crashes while the\n\
database is still open. Use the sync() method to force any\n\
unwritten data to be written to the disk.\n\
\n\
The optional mode argument is the Unix mode of the file, used only\n\
when the database has to be created. It defaults to octal 0666. ";
static PyObject *
dbmopen(self, args)
PyObject *self;
@ -395,7 +482,6 @@ PyObject *args;
int iflags;
int mode = 0666;
/* XXXX add other flags. 2nd character can be "f" meaning open in fast mode. */
if ( !PyArg_ParseTuple(args, "s|si", &name, &flags, &mode) )
return NULL;
switch (flags[0]) {
@ -422,7 +508,7 @@ PyObject *args;
}
static PyMethodDef dbmmodule_methods[] = {
{ "open", (PyCFunction)dbmopen, 1 },
{ "open", (PyCFunction)dbmopen, 1, dbmopen__doc__},
{ 0, 0 },
};
@ -430,7 +516,9 @@ void
initgdbm() {
PyObject *m, *d;
m = Py_InitModule("gdbm", dbmmodule_methods);
m = Py_InitModule4("gdbm", dbmmodule_methods,
gdbmmodule__doc__, (PyObject *)NULL,
PYTHON_API_VERSION);
d = PyModule_GetDict(m);
DbmError = PyErr_NewException("gdbm.error", NULL, NULL);
if (DbmError != NULL)