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/*
guile database glue
by C. Ray C.
*/
#include <string.h>
#include <libguile.h>
#include <db.h>
#define SCM_DB_P(x) SCM_SMOB_PREDICATE(db_tag, x)
#define SCM_BYTE_ARRAY_P(x) (SCM_TYP7(x) == scm_tc7_byvect)
static long db_tag;
static SCM scm_db_open(SCM filename);
void *db_malloc(size_t size);
static SCM scm_db_put_binary(SCM handle, SCM key, SCM data);
static SCM scm_db_get_binary(SCM handle, SCM key);
static SCM scm_db_del_binary(SCM handle, SCM key);
static SCM scm_db_put_text(SCM handle, SCM key, SCM data);
static SCM scm_db_get_text(SCM handle, SCM key);
static SCM scm_db_del_text(SCM handle, SCM key);
static SCM scm_db_close(SCM handle);
static scm_sizet free_db(SCM db_smob);
void scm_init_db(void);
static SCM
scm_db_open(SCM filename)
{
DB *db;
SCM_ASSERT_TYPE(SCM_STRINGP(filename), filename, 1,
"db-open", "filename");
if (db_create(&db, NULL, 0))
{
scm_misc_error("db-open", "db_create() failed =^P", SCM_EOL);
return SCM_BOOL_F;
}
SCM_STRING_COERCE_0TERMINATION_X(filename);
if (db->open(db, NULL, SCM_STRING_CHARS(filename), NULL,
DB_BTREE, DB_CREATE | DB_THREAD, 0))
{
scm_misc_error("db-open", "db->open() failed =^|", SCM_EOL);
return SCM_BOOL_F;
}
SCM_RETURN_NEWSMOB(db_tag, db);
}
void *
db_malloc(size_t size)
{
return scm_must_malloc(size, "libdb4.3");
}
static SCM
scm_db_put_binary(SCM handle, SCM key, SCM data)
{
DB *db;
DBT keyt;
DBT datat;
SCM_ASSERT_TYPE(SCM_DB_P(handle), handle, 1,
"db-put-binary", "handle");
SCM_ASSERT_TYPE(SCM_BYTE_ARRAY_P(key), key, 2,
"db-put-binary", "key");
SCM_ASSERT_TYPE(SCM_BYTE_ARRAY_P(data), data, 3,
"db-put-binary", "data");
db = (DB *)SCM_SMOB_DATA(handle);
if (db == NULL)
{
scm_misc_error("db-put-binary",
"given handle has been closed", SCM_EOL);
return SCM_BOOL_F;
}
memset(&keyt, 0, sizeof(DBT));
keyt.data = SCM_UVECTOR_BASE(key);
keyt.size = SCM_UVECTOR_LENGTH(key);
memset(&datat, 0, sizeof(DBT));
datat.data = SCM_UVECTOR_BASE(data);
datat.size = SCM_UVECTOR_LENGTH(data);
if (db->put(db, NULL, &keyt, &datat, 0))
{
scm_misc_error("db-put-binary", "db->put() failed =^|",
SCM_EOL);
return SCM_BOOL_F;
}
return SCM_BOOL_T;
}
static SCM
scm_db_get_binary(SCM handle, SCM key)
{
DB *db;
DBT keyt;
DBT datat;
SCM v;
SCM_ASSERT_TYPE(SCM_DB_P(handle), handle, 1,
"db-get-binary", "handle");
SCM_ASSERT_TYPE(SCM_BYTE_ARRAY_P(key), key, 2,
"db-get-binary", "key");
db = (DB *)SCM_SMOB_DATA(handle);
if (db == NULL)
{
scm_misc_error("db-get-binary",
"given handle has been closed", SCM_EOL);
return SCM_BOOL_F;
}
memset(&keyt, 0, sizeof(DBT));
keyt.data = SCM_UVECTOR_BASE(key);
keyt.size = SCM_UVECTOR_LENGTH(key);
memset(&datat, 0, sizeof(DBT));
datat.flags = DB_DBT_MALLOC;
if (db->get(db, NULL, &keyt, &datat, 0))
{
scm_misc_error("db-get-binary", "db->get() failed =^|",
SCM_EOL);
return SCM_BOOL_F;
}
SCM_NEWCELL(v);
SCM_DEFER_INTS;
SCM_SET_UVECTOR_BASE(v, datat.data);
SCM_SET_UVECTOR_LENGTH(v, datat.size, scm_tc7_byvect);
SCM_ALLOW_INTS;
return v;
}
static SCM
scm_db_del_binary(SCM handle, SCM key)
{
DB *db;
DBT keyt;
SCM v;
SCM_ASSERT_TYPE(SCM_DB_P(handle), handle, 1,
"db-del-binary", "handle");
SCM_ASSERT_TYPE(SCM_BYTE_ARRAY_P(key), key, 2,
"db-del-binary", "key");
db = (DB *)SCM_SMOB_DATA(handle);
if (db == NULL)
{
scm_misc_error("db-del-binary",
"given handle has been closed", SCM_EOL);
return SCM_BOOL_F;
}
memset(&keyt, 0, sizeof(DBT));
keyt.data = SCM_UVECTOR_BASE(key);
keyt.size = SCM_UVECTOR_LENGTH(key);
if (db->del(db, NULL, &keyt, 0))
{
scm_misc_error("db-del-binary", "db->del() failed =^|",
SCM_EOL);
return SCM_BOOL_F;
}
return SCM_BOOL_T;
}
static SCM
scm_db_put_text(SCM handle, SCM key, SCM data)
{
DB *db;
DBT keyt;
DBT datat;
SCM_ASSERT_TYPE(SCM_DB_P(handle), handle, 1,
"db-put-text", "handle");
SCM_ASSERT_TYPE(SCM_STRINGP(key), key, 2,
"db-put-text", "key");
SCM_ASSERT_TYPE(SCM_STRINGP(data), data, 3,
"db-put-text", "data");
db = (DB *)SCM_SMOB_DATA(handle);
if (db == NULL)
{
scm_misc_error("db-put-text", "given handle has been closed",
SCM_EOL);
return SCM_BOOL_F;
}
memset(&keyt, 0, sizeof(DBT));
keyt.data = SCM_STRING_CHARS(key);
keyt.size = SCM_STRING_LENGTH(key);
memset(&datat, 0, sizeof(DBT));
datat.data = SCM_STRING_CHARS(data);
datat.size = SCM_STRING_LENGTH(data);
if (db->put(db, NULL, &keyt, &datat, 0))
{
scm_misc_error("db-put-text", "db->put() failed =^|",
SCM_EOL);
return SCM_BOOL_F;
}
return SCM_BOOL_T;
}
static SCM
scm_db_get_text(SCM handle, SCM key)
{
DB *db;
DBT keyt;
DBT datat;
SCM s;
SCM_ASSERT_TYPE(SCM_DB_P(handle), handle, 1,
"db-get-text", "handle");
SCM_ASSERT_TYPE(SCM_STRINGP(key), key, 2,
"db-get-text", "key");
db = (DB *)SCM_SMOB_DATA(handle);
if (db == NULL)
{
scm_misc_error("db-get-text", "given handle has been closed",
SCM_EOL);
return SCM_BOOL_F;
}
memset(&keyt, 0, sizeof(DBT));
keyt.data = SCM_STRING_CHARS(key);
keyt.size = SCM_STRING_LENGTH(key);
memset(&datat, 0, sizeof(DBT));
datat.flags = DB_DBT_MALLOC;
if (db->get(db, NULL, &keyt, &datat, 0))
{
scm_misc_error("db-get-text", "db->get() failed =^|",
SCM_EOL);
return SCM_BOOL_F;
}
SCM_NEWCELL(s);
SCM_DEFER_INTS;
SCM_SET_STRING_CHARS(s, datat.data);
SCM_SET_STRING_LENGTH(s, datat.size);
SCM_ALLOW_INTS;
return s;
}
static SCM
scm_db_del_text(SCM handle, SCM key)
{
DB *db;
DBT keyt;
SCM s;
SCM_ASSERT_TYPE(SCM_DB_P(handle), handle, 1,
"db-del-text", "handle");
SCM_ASSERT_TYPE(SCM_STRINGP(key), key, 2,
"db-del-text", "key");
db = (DB *)SCM_SMOB_DATA(handle);
if (db == NULL)
{
scm_misc_error("db-del-text", "given handle has been closed",
SCM_EOL);
return SCM_BOOL_F;
}
memset(&keyt, 0, sizeof(DBT));
keyt.data = SCM_STRING_CHARS(key);
keyt.size = SCM_STRING_LENGTH(key);
if (db->del(db, NULL, &keyt, 0))
{
scm_misc_error("db-del-text", "db->del() failed =^|",
SCM_EOL);
return SCM_BOOL_F;
}
return SCM_BOOL_T;
}
static SCM
scm_db_close(SCM handle)
{
DB *db;
db = (DB *)SCM_SMOB_DATA(handle);
if (db == NULL)
{
scm_misc_error("db-close",
"given handle has already been closed", SCM_EOL);
return SCM_BOOL_F;
}
db->close(db, 0);
SCM_SET_SMOB_DATA(handle, NULL);
return SCM_BOOL_T;
}
static scm_sizet
free_db(SCM db_smob)
{
DB *db;
db = (DB *)SCM_SMOB_DATA(db_smob);
if (db)
db->close(db, 0);
return 0;
}
void
scm_init_db4_3(void)
{
struct function_s {
char *name;
int req;
int opt;
int rest;
SCM (*func)();
};
struct function_s functions[] = {
{ "db-open", 1, 0, 0, scm_db_open },
{ "db-put-binary", 3, 0, 0, scm_db_put_binary },
{ "db-get-binary", 2, 0, 0, scm_db_get_binary },
{ "db-del-binary", 2, 0, 0, scm_db_del_binary },
{ "db-put-text", 3, 0, 0, scm_db_put_text },
{ "db-get-text", 2, 0, 0, scm_db_get_text },
{ "db-del-text", 2, 0, 0, scm_db_del_text },
{ "db-close", 1, 0, 0, scm_db_close },
{ NULL, 0, 0, 0, NULL }
};
struct function_s *p;
for (p = functions; p->name != NULL; p++)
scm_c_define_gsubr(p->name, p->req, p->opt, p->rest, p->func);
db_tag = scm_make_smob_type("db4.3 handle", 0);
scm_set_smob_free(db_tag, free_db);
}
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