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mongoose/build/lsqlite3.c

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/************************************************************************
* lsqlite3 *
* Copyright (C) 2002-2007 Tiago Dionizio, Doug Currie *
* All rights reserved. *
* Author : Tiago Dionizio <tiago.dionizio@ist.utl.pt> *
* Author : Doug Currie <doug.currie@alum.mit.edu> *
* Library : lsqlite3 - a SQLite 3 database binding for Lua 5 *
* *
* Permission is hereby granted, free of charge, to any person obtaining *
* a copy of this software and associated documentation files (the *
* "Software"), to deal in the Software without restriction, including *
* without limitation the rights to use, copy, modify, merge, publish, *
* distribute, sublicense, and/or sell copies of the Software, and to *
* permit persons to whom the Software is furnished to do so, subject to *
* the following conditions: *
* *
* The above copyright notice and this permission notice shall be *
* included in all copies or substantial portions of the Software. *
* *
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, *
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF *
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT.*
* IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS BE LIABLE FOR ANY *
* CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN ACTION OF CONTRACT, *
* TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN CONNECTION WITH THE *
* SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE. *
************************************************************************/
#include <stdlib.h>
#include <string.h>
#include <assert.h>
#define LUA_LIB
#include "lua.h"
#include "lauxlib.h"
#include "sqlite3.h"
/* compile time features */
#if !defined(SQLITE_OMIT_PROGRESS_CALLBACK)
#define SQLITE_OMIT_PROGRESS_CALLBACK 0
#endif
typedef struct sdb sdb;
typedef struct sdb_vm sdb_vm;
typedef struct sdb_func sdb_func;
/* to use as C user data so i know what function sqlite is calling */
struct sdb_func {
/* references to associated lua values */
int fn_step;
int fn_finalize;
int udata;
sdb *db;
char aggregate;
sdb_func *next;
};
/* information about database */
struct sdb {
/* associated lua state */
lua_State *L;
/* sqlite database handle */
sqlite3 *db;
/* sql functions stack usage */
sdb_func *func; /* top SQL function being called */
/* references */
int busy_cb; /* busy callback */
int busy_udata;
int progress_cb; /* progress handler */
int progress_udata;
int trace_cb; /* trace callback */
int trace_udata;
};
static const char *sqlite_meta = ":sqlite3";
static const char *sqlite_vm_meta = ":sqlite3:vm";
static const char *sqlite_ctx_meta = ":sqlite3:ctx";
static int sqlite_ctx_meta_ref;
/*
** =======================================================
** Database Virtual Machine Operations
** =======================================================
*/
static void vm_push_column(lua_State *L, sqlite3_stmt *vm, int idx) {
switch (sqlite3_column_type(vm, idx)) {
case SQLITE_INTEGER:
{
sqlite_int64 i64 = sqlite3_column_int64(vm, idx);
lua_Number n = (lua_Number)i64;
if (n == i64)
lua_pushnumber(L, n);
else
lua_pushlstring(L, (const char*)sqlite3_column_text(vm, idx), sqlite3_column_bytes(vm, idx));
}
break;
case SQLITE_FLOAT:
lua_pushnumber(L, sqlite3_column_double(vm, idx));
break;
case SQLITE_TEXT:
lua_pushlstring(L, (const char*)sqlite3_column_text(vm, idx), sqlite3_column_bytes(vm, idx));
break;
case SQLITE_BLOB:
lua_pushlstring(L, sqlite3_column_blob(vm, idx), sqlite3_column_bytes(vm, idx));
break;
case SQLITE_NULL:
lua_pushnil(L);
break;
default:
lua_pushnil(L);
break;
}
}
/* virtual machine information */
struct sdb_vm {
sdb *db; /* associated database handle */
sqlite3_stmt *vm; /* virtual machine */
/* sqlite3_step info */
int columns; /* number of columns in result */
char has_values; /* true when step succeeds */
char temp; /* temporary vm used in db:rows */
};
/* called with sql text on the lua stack */
static sdb_vm *newvm(lua_State *L, sdb *db) {
sdb_vm *svm = (sdb_vm*)lua_newuserdata(L, sizeof(sdb_vm));
luaL_getmetatable(L, sqlite_vm_meta);
lua_setmetatable(L, -2); /* set metatable */
svm->db = db;
svm->columns = 0;
svm->has_values = 0;
svm->vm = NULL;
svm->temp = 0;
/* add an entry on the database table: svm -> sql text */
lua_pushlightuserdata(L, db);
lua_rawget(L, LUA_REGISTRYINDEX);
lua_pushlightuserdata(L, svm);
lua_pushvalue(L, -4); /* the sql text */
lua_rawset(L, -3);
lua_pop(L, 1);
return svm;
}
static int cleanupvm(lua_State *L, sdb_vm *svm) {
/* remove entry in database table - no harm if not present in the table */
lua_pushlightuserdata(L, svm->db);
lua_rawget(L, LUA_REGISTRYINDEX);
lua_pushlightuserdata(L, svm);
lua_pushnil(L);
lua_rawset(L, -3);
lua_pop(L, 1);
svm->columns = 0;
svm->has_values = 0;
if (!svm->vm) return 0;
lua_pushnumber(L, sqlite3_finalize(svm->vm));
svm->vm = NULL;
return 1;
}
static int stepvm(lua_State *L, sdb_vm *svm) {
int result;
int loop_limit = 3;
while ( loop_limit-- ) {
result = sqlite3_step(svm->vm);
if ( result==SQLITE_ERROR ) {
result = sqlite3_reset (svm->vm);
}
if ( result==SQLITE_SCHEMA ) {
sqlite3_stmt *vn;
const char *sql;
/* recover sql text */
lua_pushlightuserdata(L, svm->db);
lua_rawget(L, LUA_REGISTRYINDEX);
lua_pushlightuserdata(L, svm);
lua_rawget(L, -2); /* sql text */
sql = luaL_checkstring(L, -1);
/* re-prepare */
result = sqlite3_prepare(svm->db->db, sql, -1, &vn, NULL);
if (result != SQLITE_OK) break;
sqlite3_transfer_bindings(svm->vm, vn);
sqlite3_finalize(svm->vm);
svm->vm = vn;
lua_pop(L,2);
} else {
break;
}
}
return result;
}
static sdb_vm *lsqlite_getvm(lua_State *L, int index) {
sdb_vm *svm = (sdb_vm*)luaL_checkudata(L, index, sqlite_vm_meta);
if (svm == NULL) luaL_argerror(L, index, "bad sqlite virtual machine");
return svm;
}
static sdb_vm *lsqlite_checkvm(lua_State *L, int index) {
sdb_vm *svm = lsqlite_getvm(L, index);
if (svm->vm == NULL) luaL_argerror(L, index, "attempt to use closed sqlite virtual machine");
return svm;
}
static int dbvm_isopen(lua_State *L) {
sdb_vm *svm = lsqlite_getvm(L, 1);
lua_pushboolean(L, svm->vm != NULL ? 1 : 0);
return 1;
}
static int dbvm_tostring(lua_State *L) {
char buff[39];
sdb_vm *svm = lsqlite_getvm(L, 1);
if (svm->vm == NULL)
strcpy(buff, "closed");
else
sprintf(buff, "%p", svm);
lua_pushfstring(L, "sqlite virtual machine (%s)", buff);
return 1;
}
static int dbvm_gc(lua_State *L) {
sdb_vm *svm = lsqlite_getvm(L, 1);
if (svm->vm != NULL) /* ignore closed vms */
cleanupvm(L, svm);
return 0;
}
static int dbvm_step(lua_State *L) {
int result;
sdb_vm *svm = lsqlite_checkvm(L, 1);
result = stepvm(L, svm);
svm->has_values = result == SQLITE_ROW ? 1 : 0;
svm->columns = sqlite3_data_count(svm->vm);
lua_pushnumber(L, result);
return 1;
}
static int dbvm_finalize(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
return cleanupvm(L, svm);
}
static int dbvm_reset(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_reset(svm->vm);
lua_pushnumber(L, sqlite3_errcode(svm->db->db));
return 1;
}
static void dbvm_check_contents(lua_State *L, sdb_vm *svm) {
if (!svm->has_values) {
luaL_error(L, "misuse of function");
}
}
static void dbvm_check_index(lua_State *L, sdb_vm *svm, int index) {
if (index < 0 || index >= svm->columns) {
luaL_error(L, "index out of range [0..%d]", svm->columns - 1);
}
}
static void dbvm_check_bind_index(lua_State *L, sdb_vm *svm, int index) {
if (index < 1 || index > sqlite3_bind_parameter_count(svm->vm)) {
luaL_error(L, "bind index out of range [1..%d]", sqlite3_bind_parameter_count(svm->vm));
}
}
/*
** =======================================================
** Virtual Machine - generic info
** =======================================================
*/
static int dbvm_columns(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
lua_pushnumber(L, sqlite3_column_count(svm->vm));
return 1;
}
/*
** =======================================================
** Virtual Machine - getters
** =======================================================
*/
static int dbvm_get_value(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
int index = luaL_checkint(L, 2);
dbvm_check_contents(L, svm);
dbvm_check_index(L, svm, index);
vm_push_column(L, svm->vm, index);
return 1;
}
static int dbvm_get_name(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
int index = luaL_checknumber(L, 2);
dbvm_check_index(L, svm, index);
lua_pushstring(L, sqlite3_column_name(svm->vm, index));
return 1;
}
static int dbvm_get_type(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
int index = luaL_checknumber(L, 2);
dbvm_check_index(L, svm, index);
lua_pushstring(L, sqlite3_column_decltype(svm->vm, index));
return 1;
}
static int dbvm_get_values(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int columns = svm->columns;
int n;
dbvm_check_contents(L, svm);
lua_newtable(L);
for (n = 0; n < columns;) {
vm_push_column(L, vm, n++);
lua_rawseti(L, -2, n);
}
return 1;
}
static int dbvm_get_names(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int columns = sqlite3_column_count(vm); /* valid as soon as statement prepared */
int n;
lua_newtable(L);
for (n = 0; n < columns;) {
lua_pushstring(L, sqlite3_column_name(vm, n++));
lua_rawseti(L, -2, n);
}
return 1;
}
static int dbvm_get_types(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int columns = sqlite3_column_count(vm); /* valid as soon as statement prepared */
int n;
lua_newtable(L);
for (n = 0; n < columns;) {
lua_pushstring(L, sqlite3_column_decltype(vm, n++));
lua_rawseti(L, -2, n);
}
return 1;
}
static int dbvm_get_uvalues(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int columns = svm->columns;
int n;
dbvm_check_contents(L, svm);
lua_checkstack(L, columns);
for (n = 0; n < columns; ++n)
vm_push_column(L, vm, n);
return columns;
}
static int dbvm_get_unames(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int columns = sqlite3_column_count(vm); /* valid as soon as statement prepared */
int n;
lua_checkstack(L, columns);
for (n = 0; n < columns; ++n)
lua_pushstring(L, sqlite3_column_name(vm, n));
return columns;
}
static int dbvm_get_utypes(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int columns = sqlite3_column_count(vm); /* valid as soon as statement prepared */
int n;
lua_checkstack(L, columns);
for (n = 0; n < columns; ++n)
lua_pushstring(L, sqlite3_column_decltype(vm, n));
return columns;
}
static int dbvm_get_named_values(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int columns = svm->columns;
int n;
dbvm_check_contents(L, svm);
lua_newtable(L);
for (n = 0; n < columns; ++n) {
lua_pushstring(L, sqlite3_column_name(vm, n));
vm_push_column(L, vm, n);
lua_rawset(L, -3);
}
return 1;
}
static int dbvm_get_named_types(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int columns = sqlite3_column_count(vm);
int n;
lua_newtable(L);
for (n = 0; n < columns; ++n) {
lua_pushstring(L, sqlite3_column_name(vm, n));
lua_pushstring(L, sqlite3_column_decltype(vm, n));
lua_rawset(L, -3);
}
return 1;
}
/*
** =======================================================
** Virtual Machine - Bind
** =======================================================
*/
static int dbvm_bind_index(lua_State *L, sqlite3_stmt *vm, int index, int lindex) {
switch (lua_type(L, lindex)) {
case LUA_TSTRING:
return sqlite3_bind_text(vm, index, lua_tostring(L, lindex), lua_strlen(L, lindex), SQLITE_TRANSIENT);
case LUA_TNUMBER:
return sqlite3_bind_double(vm, index, lua_tonumber(L, lindex));
case LUA_TBOOLEAN:
return sqlite3_bind_int(vm, index, lua_toboolean(L, lindex) ? 1 : 0);
case LUA_TNONE:
case LUA_TNIL:
return sqlite3_bind_null(vm, index);
default:
luaL_error(L, "index (%d) - invalid data type for bind (%s)", index, lua_typename(L, lua_type(L, lindex)));
return SQLITE_MISUSE; /*!*/
}
}
static int dbvm_bind_parameter_count(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
lua_pushnumber(L, sqlite3_bind_parameter_count(svm->vm));
return 1;
}
static int dbvm_bind_parameter_name(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
int index = luaL_checknumber(L, 2);
dbvm_check_bind_index(L, svm, index);
lua_pushstring(L, sqlite3_bind_parameter_name(svm->vm, index));
return 1;
}
static int dbvm_bind(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int index = luaL_checkint(L, 2);
int result;
dbvm_check_bind_index(L, svm, index);
result = dbvm_bind_index(L, vm, index, 3);
lua_pushnumber(L, result);
return 1;
}
static int dbvm_bind_blob(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
int index = luaL_checkint(L, 2);
const char *value = luaL_checkstring(L, 3);
int len = lua_strlen(L, 3);
lua_pushnumber(L, sqlite3_bind_blob(svm->vm, index, value, len, SQLITE_TRANSIENT));
return 1;
}
static int dbvm_bind_values(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int top = lua_gettop(L);
int result, n;
if (top - 1 != sqlite3_bind_parameter_count(vm))
luaL_error(L,
"incorrect number of parameters to bind (%d given, %d to bind)",
top - 1,
sqlite3_bind_parameter_count(vm)
);
for (n = 2; n <= top; ++n) {
if ((result = dbvm_bind_index(L, vm, n - 1, n)) != SQLITE_OK) {
lua_pushnumber(L, result);
return 1;
}
}
lua_pushnumber(L, SQLITE_OK);
return 1;
}
static int dbvm_bind_names(lua_State *L) {
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm = svm->vm;
int count = sqlite3_bind_parameter_count(vm);
const char *name;
int result, n;
luaL_checktype(L, 2, LUA_TTABLE);
for (n = 1; n <= count; ++n) {
name = sqlite3_bind_parameter_name(vm, n);
if (name && (name[0] == ':' || name[0] == '$')) {
lua_pushstring(L, ++name);
lua_gettable(L, 2);
result = dbvm_bind_index(L, vm, n, -1);
lua_pop(L, 1);
}
else {
lua_pushnumber(L, n);
lua_gettable(L, 2);
result = dbvm_bind_index(L, vm, n, -1);
lua_pop(L, 1);
}
if (result != SQLITE_OK) {
lua_pushnumber(L, result);
return 1;
}
}
lua_pushnumber(L, SQLITE_OK);
return 1;
}
/*
** =======================================================
** Database (internal management)
** =======================================================
*/
/*
** When creating database handles, always creates a `closed' database handle
** before opening the actual database; so, if there is a memory error, the
** database is not left opened.
**
** Creates a new 'table' and leaves it in the stack
*/
static sdb *newdb (lua_State *L) {
sdb *db = (sdb*)lua_newuserdata(L, sizeof(sdb));
db->L = L;
db->db = NULL; /* database handle is currently `closed' */
db->func = NULL;
db->busy_cb =
db->busy_udata =
db->progress_cb =
db->progress_udata =
db->trace_cb =
db->trace_udata = LUA_NOREF;
luaL_getmetatable(L, sqlite_meta);
lua_setmetatable(L, -2); /* set metatable */
/* to keep track of 'open' virtual machines */
lua_pushlightuserdata(L, db);
lua_newtable(L);
lua_rawset(L, LUA_REGISTRYINDEX);
return db;
}
static int cleanupdb(lua_State *L, sdb *db) {
sdb_func *func;
sdb_func *func_next;
int top;
int result;
/* free associated virtual machines */
lua_pushlightuserdata(L, db);
lua_rawget(L, LUA_REGISTRYINDEX);
/* close all used handles */
top = lua_gettop(L);
lua_pushnil(L);
while (lua_next(L, -2)) {
sdb_vm *svm = lua_touserdata(L, -2); /* key: vm; val: sql text */
cleanupvm(L, svm);
lua_settop(L, top);
lua_pushnil(L);
}
lua_pop(L, 1); /* pop vm table */
/* remove entry in lua registry table */
lua_pushlightuserdata(L, db);
lua_pushnil(L);
lua_rawset(L, LUA_REGISTRYINDEX);
/* 'free' all references */
luaL_unref(L, LUA_REGISTRYINDEX, db->busy_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->busy_udata);
luaL_unref(L, LUA_REGISTRYINDEX, db->progress_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->progress_udata);
luaL_unref(L, LUA_REGISTRYINDEX, db->trace_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->trace_udata);
/* close database */
result = sqlite3_close(db->db);
db->db = NULL;
/* free associated memory with created functions */
func = db->func;
while (func) {
func_next = func->next;
luaL_unref(L, LUA_REGISTRYINDEX, func->fn_step);
luaL_unref(L, LUA_REGISTRYINDEX, func->fn_finalize);
luaL_unref(L, LUA_REGISTRYINDEX, func->udata);
free(func);
func = func_next;
}
db->func = NULL;
return result;
}
static sdb *lsqlite_getdb(lua_State *L, int index) {
sdb *db = (sdb*)luaL_checkudata(L, index, sqlite_meta);
// TODO lsm if (db == NULL) luaL_typerror(L, index, "sqlite database");
return db;
}
static sdb *lsqlite_checkdb(lua_State *L, int index) {
sdb *db = lsqlite_getdb(L, index);
if (db->db == NULL) luaL_argerror(L, index, "attempt to use closed sqlite database");
return db;
}
/*
** =======================================================
** User Defined Functions - Context Methods
** =======================================================
*/
typedef struct {
sqlite3_context *ctx;
int ud;
} lcontext;
static lcontext *lsqlite_make_context(lua_State *L) {
lcontext *ctx = (lcontext*)lua_newuserdata(L, sizeof(lcontext));
lua_rawgeti(L, LUA_REGISTRYINDEX, sqlite_ctx_meta_ref);
lua_setmetatable(L, -2);
ctx->ctx = NULL;
ctx->ud = LUA_NOREF;
return ctx;
}
static lcontext *lsqlite_getcontext(lua_State *L, int index) {
lcontext *ctx = (lcontext*)luaL_checkudata(L, index, sqlite_ctx_meta);
// TODO lsm if (ctx == NULL) luaL_typerror(L, index, "sqlite context");
return ctx;
}
static lcontext *lsqlite_checkcontext(lua_State *L, int index) {
lcontext *ctx = lsqlite_getcontext(L, index);
if (ctx->ctx == NULL) luaL_argerror(L, index, "invalid sqlite context");
return ctx;
}
static int lcontext_tostring(lua_State *L) {
char buff[39];
lcontext *ctx = lsqlite_getcontext(L, 1);
if (ctx->ctx == NULL)
strcpy(buff, "closed");
else
sprintf(buff, "%p", ctx->ctx);
lua_pushfstring(L, "sqlite function context (%s)", buff);
return 1;
}
static void lcontext_check_aggregate(lua_State *L, lcontext *ctx) {
sdb_func *func = (sdb_func*)sqlite3_user_data(ctx->ctx);
if (!func->aggregate) {
luaL_error(L, "attempt to call aggregate method from scalar function");
}
}
static int lcontext_user_data(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
sdb_func *func = (sdb_func*)sqlite3_user_data(ctx->ctx);
lua_rawgeti(L, LUA_REGISTRYINDEX, func->udata);
return 1;
}
static int lcontext_get_aggregate_context(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
lcontext_check_aggregate(L, ctx);
lua_rawgeti(L, LUA_REGISTRYINDEX, ctx->ud);
return 1;
}
static int lcontext_set_aggregate_context(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
lcontext_check_aggregate(L, ctx);
lua_settop(L, 2);
luaL_unref(L, LUA_REGISTRYINDEX, ctx->ud);
ctx->ud = luaL_ref(L, LUA_REGISTRYINDEX);
return 0;
}
static int lcontext_aggregate_count(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
lcontext_check_aggregate(L, ctx);
lua_pushnumber(L, sqlite3_aggregate_count(ctx->ctx));
return 1;
}
#if 0
void *sqlite3_get_auxdata(sqlite3_context*, int);
void sqlite3_set_auxdata(sqlite3_context*, int, void*, void (*)(void*));
#endif
static int lcontext_result(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
switch (lua_type(L, 2)) {
case LUA_TNUMBER:
sqlite3_result_double(ctx->ctx, luaL_checknumber(L, 2));
break;
case LUA_TSTRING:
sqlite3_result_text(ctx->ctx, luaL_checkstring(L, 2), lua_strlen(L, 2), SQLITE_TRANSIENT);
break;
case LUA_TNIL:
case LUA_TNONE:
sqlite3_result_null(ctx->ctx);
break;
default:
luaL_error(L, "invalid result type %s", lua_typename(L, 2));
break;
}
return 0;
}
static int lcontext_result_blob(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
const char *blob = luaL_checkstring(L, 2);
int size = lua_strlen(L, 2);
sqlite3_result_blob(ctx->ctx, (const void*)blob, size, SQLITE_TRANSIENT);
return 0;
}
static int lcontext_result_double(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
double d = luaL_checknumber(L, 2);
sqlite3_result_double(ctx->ctx, d);
return 0;
}
static int lcontext_result_error(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
const char *err = luaL_checkstring(L, 2);
int size = lua_strlen(L, 2);
sqlite3_result_error(ctx->ctx, err, size);
return 0;
}
static int lcontext_result_int(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
int i = luaL_checkint(L, 2);
sqlite3_result_int(ctx->ctx, i);
return 0;
}
static int lcontext_result_null(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
sqlite3_result_null(ctx->ctx);
return 0;
}
static int lcontext_result_text(lua_State *L) {
lcontext *ctx = lsqlite_checkcontext(L, 1);
const char *text = luaL_checkstring(L, 2);
int size = lua_strlen(L, 2);
sqlite3_result_text(ctx->ctx, text, size, SQLITE_TRANSIENT);
return 0;
}
/*
** =======================================================
** Database Methods
** =======================================================
*/
static int db_isopen(lua_State *L) {
sdb *db = lsqlite_getdb(L, 1);
lua_pushboolean(L, db->db != NULL ? 1 : 0);
return 1;
}
static int db_last_insert_rowid(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
/* conversion warning: int64 -> luaNumber */
sqlite_int64 rowid = sqlite3_last_insert_rowid(db->db);
lua_Number n = (lua_Number)rowid;
if (n == rowid)
lua_pushnumber(L, n);
else
lua_pushfstring(L, "%ll", rowid);
return 1;
}
static int db_changes(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
lua_pushnumber(L, sqlite3_changes(db->db));
return 1;
}
static int db_total_changes(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
lua_pushnumber(L, sqlite3_total_changes(db->db));
return 1;
}
static int db_errcode(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
lua_pushnumber(L, sqlite3_errcode(db->db));
return 1;
}
static int db_errmsg(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
lua_pushstring(L, sqlite3_errmsg(db->db));
return 1;
}
static int db_interrupt(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
sqlite3_interrupt(db->db);
return 0;
}
/*
** Registering SQL functions:
*/
static void db_push_value(lua_State *L, sqlite3_value *value) {
switch (sqlite3_value_type(value)) {
case SQLITE_TEXT:
lua_pushlstring(L, (const char*)sqlite3_value_text(value), sqlite3_value_bytes(value));
break;
case SQLITE_INTEGER:
{
sqlite_int64 i64 = sqlite3_value_int64(value);
lua_Number n = (lua_Number)i64;
if (n == i64)
lua_pushnumber(L, n);
else
lua_pushlstring(L, (const char*)sqlite3_value_text(value), sqlite3_value_bytes(value));
}
break;
case SQLITE_FLOAT:
lua_pushnumber(L, sqlite3_value_double(value));
break;
case SQLITE_BLOB:
lua_pushlstring(L, sqlite3_value_blob(value), sqlite3_value_bytes(value));
break;
case SQLITE_NULL:
lua_pushnil(L);
break;
default:
/* things done properly (SQLite + Lua SQLite)
** this should never happen */
lua_pushnil(L);
break;
}
}
/*
** callback functions used when calling registered sql functions
*/
/* scalar function to be called
** callback params: context, values... */
static void db_sql_normal_function(sqlite3_context *context, int argc, sqlite3_value **argv) {
sdb_func *func = (sdb_func*)sqlite3_user_data(context);
lua_State *L = func->db->L;
int n;
lcontext *ctx;
int top = lua_gettop(L);
/* ensure there is enough space in the stack */
lua_checkstack(L, argc + 3);
lua_rawgeti(L, LUA_REGISTRYINDEX, func->fn_step); /* function to call */
if (!func->aggregate) {
ctx = lsqlite_make_context(L); /* push context - used to set results */
}
else {
/* reuse context userdata value */
void *p = sqlite3_aggregate_context(context, 1);
/* i think it is OK to use assume that using a light user data
** as an entry on LUA REGISTRY table will be unique */
lua_pushlightuserdata(L, p);
lua_rawget(L, LUA_REGISTRYINDEX); /* context table */
if (lua_isnil(L, -1)) { /* not yet created? */
lua_pop(L, 1);
ctx = lsqlite_make_context(L);
lua_pushlightuserdata(L, p);
lua_pushvalue(L, -2);
lua_rawset(L, LUA_REGISTRYINDEX);
}
else
ctx = lsqlite_getcontext(L, -1);
}
/* push params */
for (n = 0; n < argc; ++n) {
db_push_value(L, argv[n]);
}
/* set context */
ctx->ctx = context;
if (lua_pcall(L, argc + 1, 0, 0)) {
const char *errmsg = lua_tostring(L, -1);
int size = lua_strlen(L, -1);
sqlite3_result_error(context, errmsg, size);
}
/* invalidate context */
ctx->ctx = NULL;
if (!func->aggregate) {
luaL_unref(L, LUA_REGISTRYINDEX, ctx->ud);
}
lua_settop(L, top);
}
static void db_sql_finalize_function(sqlite3_context *context) {
sdb_func *func = (sdb_func*)sqlite3_user_data(context);
lua_State *L = func->db->L;
void *p = sqlite3_aggregate_context(context, 1); /* minimal mem usage */
lcontext *ctx;
int top = lua_gettop(L);
lua_rawgeti(L, LUA_REGISTRYINDEX, func->fn_finalize); /* function to call */
/* i think it is OK to use assume that using a light user data
** as an entry on LUA REGISTRY table will be unique */
lua_pushlightuserdata(L, p);
lua_rawget(L, LUA_REGISTRYINDEX); /* context table */
if (lua_isnil(L, -1)) { /* not yet created? - shouldn't happen in finalize function */
lua_pop(L, 1);
ctx = lsqlite_make_context(L);
lua_pushlightuserdata(L, p);
lua_pushvalue(L, -2);
lua_rawset(L, LUA_REGISTRYINDEX);
}
else
ctx = lsqlite_getcontext(L, -1);
/* set context */
ctx->ctx = context;
if (lua_pcall(L, 1, 0, 0)) {
sqlite3_result_error(context, lua_tostring(L, -1), -1);
}
/* invalidate context */
ctx->ctx = NULL;
/* cleanup context */
luaL_unref(L, LUA_REGISTRYINDEX, ctx->ud);
/* remove it from registry */
lua_pushlightuserdata(L, p);
lua_pushnil(L);
lua_rawset(L, LUA_REGISTRYINDEX);
lua_settop(L, top);
}
/*
** Register a normal function
** Params: db, function name, number arguments, [ callback | step, finalize], user data
** Returns: true on sucess
**
** Normal function:
** Params: context, params
**
** Aggregate function:
** Params of step: context, params
** Params of finalize: context
*/
static int db_register_function(lua_State *L, int aggregate) {
sdb *db = lsqlite_checkdb(L, 1);
const char *name;
int args;
int result;
sdb_func *func;
/* safety measure */
if (aggregate) aggregate = 1;
name = luaL_checkstring(L, 2);
args = luaL_checkint(L, 3);
luaL_checktype(L, 4, LUA_TFUNCTION);
if (aggregate) luaL_checktype(L, 5, LUA_TFUNCTION);
/* maybe an alternative way to allocate memory should be used/avoided */
func = (sdb_func*)malloc(sizeof(sdb_func));
if (func == NULL) {
luaL_error(L, "out of memory");
}
result = sqlite3_create_function(
db->db, name, args, SQLITE_UTF8, func,
aggregate ? NULL : db_sql_normal_function,
aggregate ? db_sql_normal_function : NULL,
aggregate ? db_sql_finalize_function : NULL
);
if (result == SQLITE_OK) {
/* safety measures for userdata field to be present in the stack */
lua_settop(L, 5 + aggregate);
/* save registered function in db function list */
func->db = db;
func->aggregate = aggregate;
func->next = db->func;
db->func = func;
/* save the setp/normal function callback */
lua_pushvalue(L, 4);
func->fn_step = luaL_ref(L, LUA_REGISTRYINDEX);
/* save user data */
lua_pushvalue(L, 5+aggregate);
func->udata = luaL_ref(L, LUA_REGISTRYINDEX);
if (aggregate) {
lua_pushvalue(L, 5);
func->fn_finalize = luaL_ref(L, LUA_REGISTRYINDEX);
}
else
func->fn_finalize = LUA_NOREF;
}
else {
/* free allocated memory */
free(func);
}
lua_pushboolean(L, result == SQLITE_OK ? 1 : 0);
return 1;
}
static int db_create_function(lua_State *L) {
return db_register_function(L, 0);
}
static int db_create_aggregate(lua_State *L) {
return db_register_function(L, 1);
}
/* create_collation; contributed by Thomas Lauer
*/
typedef struct {
lua_State *L;
int ref;
} scc;
static int collwrapper(scc *co,int l1,const void *p1,
int l2,const void *p2) {
int res=0;
lua_State *L=co->L;
lua_rawgeti(L,LUA_REGISTRYINDEX,co->ref);
lua_pushlstring(L,p1,l1);
lua_pushlstring(L,p2,l2);
if (lua_pcall(L,2,1,0)==0) res=(int)lua_tonumber(L,-1);
lua_pop(L,1);
return res;
}
static void collfree(scc *co) {
if (co) {
luaL_unref(co->L,LUA_REGISTRYINDEX,co->ref);
free(co);
}
}
static int db_create_collation(lua_State *L) {
sdb *db=lsqlite_checkdb(L,1);
const char *collname=luaL_checkstring(L,2);
scc *co=NULL;
int (*collfunc)(scc *,int,const void *,int,const void *)=NULL;
lua_settop(L,3); /* default args to nil, and exclude extras */
if (lua_isfunction(L,3)) collfunc=collwrapper;
else if (!lua_isnil(L,3))
luaL_error(L,"create_collation: function or nil expected");
if (collfunc != NULL) {
co=(scc *)malloc(sizeof(scc)); /* userdata is a no-no as it
will be garbage-collected */
if (co) {
co->L=L;
/* lua_settop(L,3) above means we don't need: lua_pushvalue(L,3); */
co->ref=luaL_ref(L,LUA_REGISTRYINDEX);
}
else luaL_error(L,"create_collation: could not allocate callback");
}
sqlite3_create_collation_v2(db->db, collname, SQLITE_UTF8,
(void *)co,
(int(*)(void*,int,const void*,int,const void*))collfunc,
(void(*)(void*))collfree);
return 0;
}
/*
** trace callback:
** Params: database, callback function, userdata
**
** callback function:
** Params: userdata, sql
*/
static void db_trace_callback(void *user, const char *sql) {
sdb *db = (sdb*)user;
lua_State *L = db->L;
int top = lua_gettop(L);
/* setup lua callback call */
lua_rawgeti(L, LUA_REGISTRYINDEX, db->trace_cb); /* get callback */
lua_rawgeti(L, LUA_REGISTRYINDEX, db->trace_udata); /* get callback user data */
lua_pushstring(L, sql); /* traced sql statement */
/* call lua function */
lua_pcall(L, 2, 0, 0);
/* ignore any error generated by this function */
lua_settop(L, top);
}
static int db_trace(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
if (lua_gettop(L) < 2 || lua_isnil(L, 2)) {
luaL_unref(L, LUA_REGISTRYINDEX, db->trace_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->trace_udata);
db->trace_cb =
db->trace_udata = LUA_NOREF;
/* clear busy handler */
sqlite3_trace(db->db, NULL, NULL);
}
else {
luaL_checktype(L, 2, LUA_TFUNCTION);
/* make sure we have an userdata field (even if nil) */
lua_settop(L, 3);
luaL_unref(L, LUA_REGISTRYINDEX, db->trace_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->trace_udata);
db->trace_udata = luaL_ref(L, LUA_REGISTRYINDEX);
db->trace_cb = luaL_ref(L, LUA_REGISTRYINDEX);
/* set busy handler */
sqlite3_trace(db->db, db_trace_callback, db);
}
return 0;
}
#if !defined(SQLITE_OMIT_PROGRESS_CALLBACK) || !SQLITE_OMIT_PROGRESS_CALLBACK
/*
** progress handler:
** Params: database, number of opcodes, callback function, userdata
**
** callback function:
** Params: userdata
** returns: 0 to return immediatly and return SQLITE_ABORT, non-zero to continue
*/
static int db_progress_callback(void *user) {
int result = 1; /* abort by default */
sdb *db = (sdb*)user;
lua_State *L = db->L;
int top = lua_gettop(L);
lua_rawgeti(L, LUA_REGISTRYINDEX, db->progress_cb);
lua_rawgeti(L, LUA_REGISTRYINDEX, db->progress_udata);
/* call lua function */
if (!lua_pcall(L, 1, 1, 0))
result = lua_toboolean(L, -1);
lua_settop(L, top);
return result;
}
static int db_progress_handler(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
if (lua_gettop(L) < 2 || lua_isnil(L, 2)) {
luaL_unref(L, LUA_REGISTRYINDEX, db->progress_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->progress_udata);
db->progress_cb =
db->progress_udata = LUA_NOREF;
/* clear busy handler */
sqlite3_progress_handler(db->db, 0, NULL, NULL);
}
else {
int nop = luaL_checkint(L, 2); /* number of opcodes */
luaL_checktype(L, 3, LUA_TFUNCTION);
/* make sure we have an userdata field (even if nil) */
lua_settop(L, 4);
luaL_unref(L, LUA_REGISTRYINDEX, db->progress_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->progress_udata);
db->progress_udata = luaL_ref(L, LUA_REGISTRYINDEX);
db->progress_cb = luaL_ref(L, LUA_REGISTRYINDEX);
/* set progress callback */
sqlite3_progress_handler(db->db, nop, db_progress_callback, db);
}
return 0;
}
#else /* #if !defined(SQLITE_OMIT_PROGRESS_CALLBACK) || !SQLITE_OMIT_PROGRESS_CALLBACK */
static int db_progress_handler(lua_State *L) {
lua_pushliteral(L, "progress callback support disabled at compile time");
lua_error(L);
return 0;
}
#endif /* #if !defined(SQLITE_OMIT_PROGRESS_CALLBACK) || !SQLITE_OMIT_PROGRESS_CALLBACK */
/*
** busy handler:
** Params: database, callback function, userdata
**
** callback function:
** Params: userdata, number of tries
** returns: 0 to return immediatly and return SQLITE_BUSY, non-zero to try again
*/
static int db_busy_callback(void *user, int tries) {
int retry = 0; /* abort by default */
sdb *db = (sdb*)user;
lua_State *L = db->L;
int top = lua_gettop(L);
lua_rawgeti(L, LUA_REGISTRYINDEX, db->busy_cb);
lua_rawgeti(L, LUA_REGISTRYINDEX, db->busy_udata);
lua_pushnumber(L, tries);
/* call lua function */
if (!lua_pcall(L, 2, 1, 0))
retry = lua_toboolean(L, -1);
lua_settop(L, top);
return retry;
}
static int db_busy_handler(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
if (lua_gettop(L) < 2 || lua_isnil(L, 2)) {
luaL_unref(L, LUA_REGISTRYINDEX, db->busy_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->busy_udata);
db->busy_cb =
db->busy_udata = LUA_NOREF;
/* clear busy handler */
sqlite3_busy_handler(db->db, NULL, NULL);
}
else {
luaL_checktype(L, 2, LUA_TFUNCTION);
/* make sure we have an userdata field (even if nil) */
lua_settop(L, 3);
luaL_unref(L, LUA_REGISTRYINDEX, db->busy_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->busy_udata);
db->busy_udata = luaL_ref(L, LUA_REGISTRYINDEX);
db->busy_cb = luaL_ref(L, LUA_REGISTRYINDEX);
/* set busy handler */
sqlite3_busy_handler(db->db, db_busy_callback, db);
}
return 0;
}
static int db_busy_timeout(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
int timeout = luaL_checkint(L, 2);
sqlite3_busy_timeout(db->db, timeout);
/* if there was a timeout callback registered, it is now
** invalid/useless. free any references we may have */
luaL_unref(L, LUA_REGISTRYINDEX, db->busy_cb);
luaL_unref(L, LUA_REGISTRYINDEX, db->busy_udata);
db->busy_cb =
db->busy_udata = LUA_NOREF;
return 0;
}
/*
** Params: db, sql, callback, user
** returns: code [, errmsg]
**
** Callback:
** Params: user, number of columns, values, names
** Returns: 0 to continue, other value will cause abort
*/
static int db_exec_callback(void* user, int columns, char **data, char **names) {
int result = SQLITE_ABORT; /* abort by default */
lua_State *L = (lua_State*)user;
int n;
int top = lua_gettop(L);
lua_pushvalue(L, 3); /* function to call */
lua_pushvalue(L, 4); /* user data */
lua_pushnumber(L, columns); /* total number of rows in result */
/* column values */
lua_pushvalue(L, 6);
for (n = 0; n < columns;) {
lua_pushstring(L, data[n++]);
lua_rawseti(L, -2, n);
}
/* columns names */
lua_pushvalue(L, 5);
if (lua_isnil(L, -1)) {
lua_pop(L, 1);
lua_newtable(L);
lua_pushvalue(L, -1);
lua_replace(L, 5);
for (n = 0; n < columns;) {
lua_pushstring(L, names[n++]);
lua_rawseti(L, -2, n);
}
}
/* call lua function */
if (!lua_pcall(L, 4, 1, 0)) {
if (lua_isnumber(L, -1))
result = lua_tonumber(L, -1);
}
lua_settop(L, top);
return result;
}
static int db_exec(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
const char *sql = luaL_checkstring(L, 2);
int result;
if (!lua_isnoneornil(L, 3)) {
/* stack:
** 3: callback function
** 4: userdata
** 5: column names
** 6: reusable column values
*/
luaL_checktype(L, 3, LUA_TFUNCTION);
lua_settop(L, 4); /* 'trap' userdata - nil extra parameters */
lua_pushnil(L); /* column names not known at this point */
lua_newtable(L); /* column values table */
result = sqlite3_exec(db->db, sql, db_exec_callback, L, NULL);
}
else {
/* no callbacks */
result = sqlite3_exec(db->db, sql, NULL, NULL, NULL);
}
lua_pushnumber(L, result);
return 1;
}
/*
** Params: db, sql
** returns: code, compiled length or error message
*/
static int db_prepare(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
const char *sql = luaL_checkstring(L, 2);
int sql_len = lua_strlen(L, 2);
const char *sqltail;
sdb_vm *svm;
lua_settop(L,2); /* sql is on top of stack for call to newvm */
svm = newvm(L, db);
if (sqlite3_prepare(db->db, sql, sql_len, &svm->vm, &sqltail) != SQLITE_OK) {
cleanupvm(L, svm);
lua_pushnil(L);
lua_pushnumber(L, sqlite3_errcode(db->db));
return 2;
}
/* vm already in the stack */
lua_pushstring(L, sqltail);
return 2;
}
static int db_do_next_row(lua_State *L, int packed) {
int result;
sdb_vm *svm = lsqlite_checkvm(L, 1);
sqlite3_stmt *vm;
int columns;
int i;
result = stepvm(L, svm);
vm = svm->vm; /* stepvm may change svm->vm if re-prepare is needed */
svm->has_values = result == SQLITE_ROW ? 1 : 0;
svm->columns = columns = sqlite3_data_count(vm);
if (result == SQLITE_ROW) {
if (packed) {
lua_newtable(L);
if (packed == 1) {
for (i = 0; i < columns;) {
vm_push_column(L, vm, i);
lua_rawseti(L, -2, ++i);
}
}
else {
for (i = 0; i < columns; ++i) {
lua_pushstring(L, sqlite3_column_name(vm, i));
vm_push_column(L, vm, i);
lua_rawset(L, -3);
}
}
return 1;
}
else {
lua_checkstack(L, columns);
for (i = 0; i < columns; ++i)
vm_push_column(L, vm, i);
return svm->columns;
}
}
if (svm->temp) {
/* finalize and check for errors */
result = sqlite3_finalize(vm);
svm->vm = NULL;
cleanupvm(L, svm);
}
else if (result == SQLITE_DONE) {
result = sqlite3_reset(vm);
}
if (result != SQLITE_OK) {
lua_pushstring(L, sqlite3_errmsg(svm->db->db));
lua_error(L);
}
return 0;
}
static int db_next_row(lua_State *L) {
return db_do_next_row(L, 0);
}
static int db_next_packed_row(lua_State *L) {
return db_do_next_row(L, 1);
}
static int db_next_named_row(lua_State *L) {
return db_do_next_row(L, 2);
}
static int dbvm_do_rows(lua_State *L, int(*f)(lua_State *)) {
/* sdb_vm *svm = */
lsqlite_checkvm(L, 1);
lua_pushvalue(L,1);
lua_pushcfunction(L, f);
lua_insert(L, -2);
return 2;
}
static int dbvm_rows(lua_State *L) {
return dbvm_do_rows(L, db_next_packed_row);
}
static int dbvm_nrows(lua_State *L) {
return dbvm_do_rows(L, db_next_named_row);
}
static int dbvm_urows(lua_State *L) {
return dbvm_do_rows(L, db_next_row);
}
static int db_do_rows(lua_State *L, int(*f)(lua_State *)) {
sdb *db = lsqlite_checkdb(L, 1);
const char *sql = luaL_checkstring(L, 2);
sdb_vm *svm;
lua_settop(L,2); /* sql is on top of stack for call to newvm */
svm = newvm(L, db);
svm->temp = 1;
if (sqlite3_prepare(db->db, sql, -1, &svm->vm, NULL) != SQLITE_OK) {
cleanupvm(L, svm);
lua_pushstring(L, sqlite3_errmsg(svm->db->db));
lua_error(L);
}
lua_pushcfunction(L, f);
lua_insert(L, -2);
return 2;
}
static int db_rows(lua_State *L) {
return db_do_rows(L, db_next_packed_row);
}
static int db_nrows(lua_State *L) {
return db_do_rows(L, db_next_named_row);
}
/* unpacked version of db:rows */
static int db_urows(lua_State *L) {
return db_do_rows(L, db_next_row);
}
static int db_tostring(lua_State *L) {
char buff[32];
sdb *db = lsqlite_getdb(L, 1);
if (db->db == NULL)
strcpy(buff, "closed");
else
sprintf(buff, "%p", lua_touserdata(L, 1));
lua_pushfstring(L, "sqlite database (%s)", buff);
return 1;
}
static int db_close(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
lua_pushnumber(L, cleanupdb(L, db));
return 1;
}
static int db_close_vm(lua_State *L) {
sdb *db = lsqlite_checkdb(L, 1);
/* cleanup temporary only tables? */
int temp = lua_toboolean(L, 2);
/* free associated virtual machines */
lua_pushlightuserdata(L, db);
lua_rawget(L, LUA_REGISTRYINDEX);
/* close all used handles */
lua_pushnil(L);
while (lua_next(L, -2)) {
sdb_vm *svm = lua_touserdata(L, -2); /* key: vm; val: sql text */
if ((!temp || svm->temp) && svm->vm)
{
sqlite3_finalize(svm->vm);
svm->vm = NULL;
}
/* leave key in the stack */
lua_pop(L, 1);
}
return 0;
}
static int db_gc(lua_State *L) {
sdb *db = lsqlite_getdb(L, 1);
if (db->db != NULL) /* ignore closed databases */
cleanupdb(L, db);
return 0;
}
/*
** =======================================================
** General library functions
** =======================================================
*/
static int lsqlite_version(lua_State *L) {
lua_pushstring(L, sqlite3_libversion());
return 1;
}
static int lsqlite_complete(lua_State *L) {
const char *sql = luaL_checkstring(L, 1);
lua_pushboolean(L, sqlite3_complete(sql));
return 1;
}
#ifndef WIN32
static int lsqlite_temp_directory(lua_State *L) {
const char *oldtemp = sqlite3_temp_directory;
if (!lua_isnone(L, 1)) {
const char *temp = luaL_optstring(L, 1, NULL);
if (sqlite3_temp_directory) {
sqlite3_free((char*)sqlite3_temp_directory);
}
if (temp) {
sqlite3_temp_directory = sqlite3_mprintf("%s", temp);
}
else {
sqlite3_temp_directory = NULL;
}
}
lua_pushstring(L, oldtemp);
return 1;
}
#endif
static int lsqlite_do_open(lua_State *L, const char *filename) {
sdb *db = newdb(L); /* create and leave in stack */
if (sqlite3_open(filename, &db->db) == SQLITE_OK) {
/* database handle already in the stack - return it */
return 1;
}
/* failed to open database */
lua_pushnil(L); /* push nil */
lua_pushnumber(L, sqlite3_errcode(db->db));
lua_pushstring(L, sqlite3_errmsg(db->db)); /* push error message */
/* clean things up */
cleanupdb(L, db);
/* return */
return 3;
}
static int lsqlite_open(lua_State *L) {
const char *filename = luaL_checkstring(L, 1);
return lsqlite_do_open(L, filename);
}
static int lsqlite_open_memory(lua_State *L) {
return lsqlite_do_open(L, ":memory:");
}
static int lsqlite_newindex(lua_State *L) {
lua_pushliteral(L, "attempt to change readonly table");
lua_error(L);
return 0;
}
/*
** =======================================================
** Register functions
** =======================================================
*/
#define SC(s) { #s, SQLITE_ ## s },
#define LSC(s) { #s, LSQLITE_ ## s },
static const struct {
const char* name;
int value;
} sqlite_constants[] = {
/* error codes */
SC(OK) SC(ERROR) SC(INTERNAL) SC(PERM)
SC(ABORT) SC(BUSY) SC(LOCKED) SC(NOMEM)
SC(READONLY) SC(INTERRUPT) SC(IOERR) SC(CORRUPT)
SC(NOTFOUND) SC(FULL) SC(CANTOPEN) SC(PROTOCOL)
SC(EMPTY) SC(SCHEMA) SC(TOOBIG) SC(CONSTRAINT)
SC(MISMATCH) SC(MISUSE) SC(NOLFS)
SC(FORMAT) SC(NOTADB)
/* sqlite_step specific return values */
SC(RANGE) SC(ROW) SC(DONE)
/* column types */
SC(INTEGER) SC(FLOAT) SC(TEXT) SC(BLOB)
SC(NULL)
/* terminator */
{ NULL, 0 }
};
/* ======================================================= */
static const luaL_Reg dblib[] = {
{"isopen", db_isopen },
{"last_insert_rowid", db_last_insert_rowid },
{"changes", db_changes },
{"total_changes", db_total_changes },
{"errcode", db_errcode },
{"error_code", db_errcode },
{"errmsg", db_errmsg },
{"error_message", db_errmsg },
{"interrupt", db_interrupt },
{"create_function", db_create_function },
{"create_aggregate", db_create_aggregate },
{"create_collation", db_create_collation },
{"trace", db_trace },
{"progress_handler", db_progress_handler },
{"busy_timeout", db_busy_timeout },
{"busy_handler", db_busy_handler },
{"prepare", db_prepare },
{"rows", db_rows },
{"urows", db_urows },
{"nrows", db_nrows },
{"exec", db_exec },
{"execute", db_exec },
{"close", db_close },
{"close_vm", db_close_vm },
{"__tostring", db_tostring },
{"__gc", db_gc },
{NULL, NULL}
};
static const luaL_Reg vmlib[] = {
{"isopen", dbvm_isopen },
{"step", dbvm_step },
{"reset", dbvm_reset },
{"finalize", dbvm_finalize },
{"columns", dbvm_columns },
{"bind", dbvm_bind },
{"bind_values", dbvm_bind_values },
{"bind_names", dbvm_bind_names },
{"bind_blob", dbvm_bind_blob },
{"bind_parameter_count",dbvm_bind_parameter_count},
{"bind_parameter_name", dbvm_bind_parameter_name},
{"get_value", dbvm_get_value },
{"get_values", dbvm_get_values },
{"get_name", dbvm_get_name },
{"get_names", dbvm_get_names },
{"get_type", dbvm_get_type },
{"get_types", dbvm_get_types },
{"get_uvalues", dbvm_get_uvalues },
{"get_unames", dbvm_get_unames },
{"get_utypes", dbvm_get_utypes },
{"get_named_values", dbvm_get_named_values },
{"get_named_types", dbvm_get_named_types },
{"rows", dbvm_rows },
{"urows", dbvm_urows },
{"nrows", dbvm_nrows },
/* compatibility names (added by request) */
{"idata", dbvm_get_values },
{"inames", dbvm_get_names },
{"itypes", dbvm_get_types },
{"data", dbvm_get_named_values },
{"type", dbvm_get_named_types },
{"__tostring", dbvm_tostring },
{"__gc", dbvm_gc },
{ NULL, NULL }
};
static const luaL_Reg ctxlib[] = {
{"user_data", lcontext_user_data },
{"get_aggregate_data", lcontext_get_aggregate_context },
{"set_aggregate_data", lcontext_set_aggregate_context },
{"aggregate_count", lcontext_aggregate_count },
{"result", lcontext_result },
{"result_null", lcontext_result_null },
{"result_number", lcontext_result_double },
{"result_double", lcontext_result_double },
{"result_int", lcontext_result_int },
{"result_text", lcontext_result_text },
{"result_blob", lcontext_result_blob },
{"result_error", lcontext_result_error },
{"__tostring", lcontext_tostring },
{NULL, NULL}
};
static const luaL_Reg sqlitelib[] = {
{"version", lsqlite_version },
{"complete", lsqlite_complete },
#ifndef WIN32
{"temp_directory", lsqlite_temp_directory },
#endif
{"open", lsqlite_open },
{"open_memory", lsqlite_open_memory },
{"__newindex", lsqlite_newindex },
{NULL, NULL}
};
static void create_meta(lua_State *L, const char *name, const luaL_Reg *lib) {
luaL_newmetatable(L, name);
lua_pushstring(L, "__index");
lua_pushvalue(L, -2); /* push metatable */
lua_rawset(L, -3); /* metatable.__index = metatable */
/* register metatable functions */
luaL_openlib(L, NULL, lib, 0);
/* remove metatable from stack */
lua_pop(L, 1);
}
LUALIB_API int luaopen_lsqlite3(lua_State *L) {
create_meta(L, sqlite_meta, dblib);
create_meta(L, sqlite_vm_meta, vmlib);
create_meta(L, sqlite_ctx_meta, ctxlib);
luaL_getmetatable(L, sqlite_ctx_meta);
sqlite_ctx_meta_ref = luaL_ref(L, LUA_REGISTRYINDEX);
/* register (local) sqlite metatable */
luaL_register(L, "sqlite3", sqlitelib);
{
int i = 0;
/* add constants to global table */
while (sqlite_constants[i].name) {
lua_pushstring(L, sqlite_constants[i].name);
lua_pushnumber(L, sqlite_constants[i].value);
lua_rawset(L, -3);
++i;
}
}
/* set sqlite's metatable to itself - set as readonly (__newindex) */
lua_pushvalue(L, -1);
lua_setmetatable(L, -2);
return 1;
}
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