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Sweden-Number/dlls/vbscript/compile.c

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/*
* Copyright 2011 Jacek Caban for CodeWeavers
*
* This library is free software; you can redistribute it and/or
* modify it under the terms of the GNU Lesser General Public
* License as published by the Free Software Foundation; either
* version 2.1 of the License, or (at your option) any later version.
*
* This library is distributed in the hope that it will be useful,
* but WITHOUT ANY WARRANTY; without even the implied warranty of
* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
* Lesser General Public License for more details.
*
* You should have received a copy of the GNU Lesser General Public
* License along with this library; if not, write to the Free Software
* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
*/
#include <assert.h>
#include "vbscript.h"
#include "parse.h"
#include "parser.tab.h"
#include "wine/debug.h"
WINE_DEFAULT_DEBUG_CHANNEL(vbscript);
WINE_DECLARE_DEBUG_CHANNEL(vbscript_disas);
typedef struct {
parser_ctx_t parser;
unsigned instr_cnt;
unsigned instr_size;
vbscode_t *code;
unsigned *labels;
unsigned labels_size;
unsigned labels_cnt;
dim_decl_t *dim_decls;
dynamic_var_t *global_vars;
} compile_ctx_t;
static HRESULT compile_expression(compile_ctx_t*,expression_t*);
static HRESULT compile_statement(compile_ctx_t*,statement_t*);
static const struct {
const char *op_str;
instr_arg_type_t arg1_type;
instr_arg_type_t arg2_type;
} instr_info[] = {
#define X(n,a,b,c) {#n,b,c},
OP_LIST
#undef X
};
static void dump_instr_arg(instr_arg_type_t type, instr_arg_t *arg)
{
switch(type) {
case ARG_STR:
case ARG_BSTR:
TRACE_(vbscript_disas)("\t%s", debugstr_w(arg->str));
break;
case ARG_INT:
TRACE_(vbscript_disas)("\t%d", arg->uint);
break;
case ARG_UINT:
case ARG_ADDR:
TRACE_(vbscript_disas)("\t%u", arg->uint);
break;
case ARG_DOUBLE:
TRACE_(vbscript_disas)("\t%lf", *arg->dbl);
break;
case ARG_NONE:
break;
default:
assert(0);
}
}
static void dump_code(compile_ctx_t *ctx)
{
instr_t *instr;
for(instr = ctx->code->instrs; instr < ctx->code->instrs+ctx->instr_cnt; instr++) {
TRACE_(vbscript_disas)("%d:\t%s", instr-ctx->code->instrs, instr_info[instr->op].op_str);
dump_instr_arg(instr_info[instr->op].arg1_type, &instr->arg1);
dump_instr_arg(instr_info[instr->op].arg2_type, &instr->arg2);
TRACE_(vbscript_disas)("\n");
}
}
static inline void *compiler_alloc(vbscode_t *vbscode, size_t size)
{
return vbsheap_alloc(&vbscode->heap, size);
}
static WCHAR *compiler_alloc_string(vbscode_t *vbscode, const WCHAR *str)
{
size_t size;
WCHAR *ret;
size = (strlenW(str)+1)*sizeof(WCHAR);
ret = compiler_alloc(vbscode, size);
if(ret)
memcpy(ret, str, size);
return ret;
}
static inline instr_t *instr_ptr(compile_ctx_t *ctx, unsigned id)
{
assert(id < ctx->instr_cnt);
return ctx->code->instrs + id;
}
static unsigned push_instr(compile_ctx_t *ctx, vbsop_t op)
{
assert(ctx->instr_size && ctx->instr_size >= ctx->instr_cnt);
if(ctx->instr_size == ctx->instr_cnt) {
instr_t *new_instr;
new_instr = heap_realloc(ctx->code->instrs, ctx->instr_size*2*sizeof(instr_t));
if(!new_instr)
return -1;
ctx->code->instrs = new_instr;
ctx->instr_size *= 2;
}
ctx->code->instrs[ctx->instr_cnt].op = op;
return ctx->instr_cnt++;
}
static HRESULT push_instr_int(compile_ctx_t *ctx, vbsop_t op, LONG arg)
{
unsigned ret;
ret = push_instr(ctx, op);
if(ret == -1)
return E_OUTOFMEMORY;
instr_ptr(ctx, ret)->arg1.lng = arg;
return S_OK;
}
static HRESULT push_instr_addr(compile_ctx_t *ctx, vbsop_t op, unsigned arg)
{
unsigned ret;
ret = push_instr(ctx, op);
if(ret == -1)
return E_OUTOFMEMORY;
instr_ptr(ctx, ret)->arg1.uint = arg;
return S_OK;
}
static HRESULT push_instr_str(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg)
{
unsigned instr;
WCHAR *str;
str = compiler_alloc_string(ctx->code, arg);
if(!str)
return E_OUTOFMEMORY;
instr = push_instr(ctx, op);
if(instr == -1)
return E_OUTOFMEMORY;
instr_ptr(ctx, instr)->arg1.str = str;
return S_OK;
}
static HRESULT push_instr_double(compile_ctx_t *ctx, vbsop_t op, double arg)
{
unsigned instr;
double *d;
d = compiler_alloc(ctx->code, sizeof(double));
if(!d)
return E_OUTOFMEMORY;
instr = push_instr(ctx, op);
if(instr == -1)
return E_OUTOFMEMORY;
*d = arg;
instr_ptr(ctx, instr)->arg1.dbl = d;
return S_OK;
}
static BSTR alloc_bstr_arg(compile_ctx_t *ctx, const WCHAR *str)
{
if(!ctx->code->bstr_pool_size) {
ctx->code->bstr_pool = heap_alloc(8 * sizeof(BSTR));
if(!ctx->code->bstr_pool)
return NULL;
ctx->code->bstr_pool_size = 8;
}else if(ctx->code->bstr_pool_size == ctx->code->bstr_cnt) {
BSTR *new_pool;
new_pool = heap_realloc(ctx->code->bstr_pool, ctx->code->bstr_pool_size*2*sizeof(BSTR));
if(!new_pool)
return NULL;
ctx->code->bstr_pool = new_pool;
ctx->code->bstr_pool_size *= 2;
}
ctx->code->bstr_pool[ctx->code->bstr_cnt] = SysAllocString(str);
if(!ctx->code->bstr_pool[ctx->code->bstr_cnt])
return NULL;
return ctx->code->bstr_pool[ctx->code->bstr_cnt++];
}
static HRESULT push_instr_bstr(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg)
{
unsigned instr;
BSTR bstr;
bstr = alloc_bstr_arg(ctx, arg);
if(!bstr)
return E_OUTOFMEMORY;
instr = push_instr(ctx, op);
if(instr == -1)
return E_OUTOFMEMORY;
instr_ptr(ctx, instr)->arg1.bstr = bstr;
return S_OK;
}
static HRESULT push_instr_bstr_uint(compile_ctx_t *ctx, vbsop_t op, const WCHAR *arg1, unsigned arg2)
{
unsigned instr;
BSTR bstr;
bstr = alloc_bstr_arg(ctx, arg1);
if(!bstr)
return E_OUTOFMEMORY;
instr = push_instr(ctx, op);
if(instr == -1)
return E_OUTOFMEMORY;
instr_ptr(ctx, instr)->arg1.bstr = bstr;
instr_ptr(ctx, instr)->arg2.uint = arg2;
return S_OK;
}
#define LABEL_FLAG 0x80000000
static unsigned alloc_label(compile_ctx_t *ctx)
{
if(!ctx->labels_size) {
ctx->labels = heap_alloc(8 * sizeof(*ctx->labels));
if(!ctx->labels)
return -1;
ctx->labels_size = 8;
}else if(ctx->labels_size == ctx->labels_cnt) {
unsigned *new_labels;
new_labels = heap_realloc(ctx->labels, 2*ctx->labels_size*sizeof(*ctx->labels));
if(!new_labels)
return -1;
ctx->labels = new_labels;
ctx->labels_size *= 2;
}
return ctx->labels_cnt++ | LABEL_FLAG;
}
static inline void label_set_addr(compile_ctx_t *ctx, unsigned label)
{
assert(label & LABEL_FLAG);
ctx->labels[label & ~LABEL_FLAG] = ctx->instr_cnt;
}
static HRESULT compile_args(compile_ctx_t *ctx, expression_t *args, unsigned *ret)
{
unsigned arg_cnt = 0;
HRESULT hres;
while(args) {
hres = compile_expression(ctx, args);
if(FAILED(hres))
return hres;
arg_cnt++;
args = args->next;
}
*ret = arg_cnt;
return S_OK;
}
static HRESULT compile_member_expression(compile_ctx_t *ctx, member_expression_t *expr, BOOL ret_val)
{
unsigned arg_cnt = 0;
HRESULT hres;
hres = compile_args(ctx, expr->args, &arg_cnt);
if(FAILED(hres))
return hres;
if(expr->obj_expr) {
FIXME("obj_expr not implemented\n");
hres = E_NOTIMPL;
}else {
hres = push_instr_bstr_uint(ctx, ret_val ? OP_icall : OP_icallv, expr->identifier, arg_cnt);
}
return hres;
}
static HRESULT compile_unary_expression(compile_ctx_t *ctx, unary_expression_t *expr, vbsop_t op)
{
HRESULT hres;
hres = compile_expression(ctx, expr->subexpr);
if(FAILED(hres))
return hres;
return push_instr(ctx, op) == -1 ? E_OUTOFMEMORY : S_OK;
}
static HRESULT compile_binary_expression(compile_ctx_t *ctx, binary_expression_t *expr, vbsop_t op)
{
HRESULT hres;
hres = compile_expression(ctx, expr->left);
if(FAILED(hres))
return hres;
hres = compile_expression(ctx, expr->right);
if(FAILED(hres))
return hres;
return push_instr(ctx, op) == -1 ? E_OUTOFMEMORY : S_OK;
}
static HRESULT compile_expression(compile_ctx_t *ctx, expression_t *expr)
{
switch(expr->type) {
case EXPR_ADD:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_add);
case EXPR_BOOL:
return push_instr_int(ctx, OP_bool, ((bool_expression_t*)expr)->value);
case EXPR_CONCAT:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_concat);
case EXPR_DIV:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_div);
case EXPR_DOUBLE:
return push_instr_double(ctx, OP_double, ((double_expression_t*)expr)->value);
case EXPR_EMPTY:
return push_instr(ctx, OP_empty) != -1 ? S_OK : E_OUTOFMEMORY;
case EXPR_EQUAL:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_equal);
case EXPR_EXP:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_exp);
case EXPR_IDIV:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_idiv);
case EXPR_MEMBER:
return compile_member_expression(ctx, (member_expression_t*)expr, TRUE);
case EXPR_MOD:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_mod);
case EXPR_MUL:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_mul);
case EXPR_NEG:
return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_neg);
case EXPR_NEQUAL:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_nequal);
case EXPR_NOT:
return compile_unary_expression(ctx, (unary_expression_t*)expr, OP_not);
case EXPR_NULL:
return push_instr(ctx, OP_null) != -1 ? S_OK : E_OUTOFMEMORY;
case EXPR_STRING:
return push_instr_str(ctx, OP_string, ((string_expression_t*)expr)->value);
case EXPR_SUB:
return compile_binary_expression(ctx, (binary_expression_t*)expr, OP_sub);
case EXPR_USHORT:
return push_instr_int(ctx, OP_short, ((int_expression_t*)expr)->value);
case EXPR_ULONG:
return push_instr_int(ctx, OP_long, ((int_expression_t*)expr)->value);
default:
FIXME("Unimplemented expression type %d\n", expr->type);
return E_NOTIMPL;
}
return S_OK;
}
static HRESULT compile_if_statement(compile_ctx_t *ctx, if_statement_t *stat)
{
unsigned cnd_jmp, endif_label = -1;
elseif_decl_t *elseif_decl;
HRESULT hres;
hres = compile_expression(ctx, stat->expr);
if(FAILED(hres))
return hres;
cnd_jmp = push_instr(ctx, OP_jmp_false);
if(cnd_jmp == -1)
return E_OUTOFMEMORY;
hres = compile_statement(ctx, stat->if_stat);
if(FAILED(hres))
return hres;
if(stat->else_stat || stat->elseifs) {
endif_label = alloc_label(ctx);
if(endif_label == -1)
return E_OUTOFMEMORY;
hres = push_instr_addr(ctx, OP_jmp, endif_label);
if(FAILED(hres))
return hres;
}
for(elseif_decl = stat->elseifs; elseif_decl; elseif_decl = elseif_decl->next) {
instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
hres = compile_expression(ctx, elseif_decl->expr);
if(FAILED(hres))
return hres;
cnd_jmp = push_instr(ctx, OP_jmp_false);
if(cnd_jmp == -1)
return E_OUTOFMEMORY;
hres = compile_statement(ctx, elseif_decl->stat);
if(FAILED(hres))
return hres;
hres = push_instr_addr(ctx, OP_jmp, endif_label);
if(FAILED(hres))
return hres;
}
instr_ptr(ctx, cnd_jmp)->arg1.uint = ctx->instr_cnt;
if(stat->else_stat) {
hres = compile_statement(ctx, stat->else_stat);
if(FAILED(hres))
return hres;
}
if(endif_label != -1)
label_set_addr(ctx, endif_label);
return S_OK;
}
static HRESULT compile_assign_statement(compile_ctx_t *ctx, assign_statement_t *stat)
{
HRESULT hres;
hres = compile_expression(ctx, stat->value_expr);
if(FAILED(hres))
return hres;
if(stat->member_expr->args) {
FIXME("arguments support not implemented\n");
return E_NOTIMPL;
}
if(stat->member_expr->obj_expr) {
hres = compile_expression(ctx, stat->member_expr->obj_expr);
if(FAILED(hres))
return hres;
hres = push_instr_bstr(ctx, OP_assign_member, stat->member_expr->identifier);
}else {
hres = push_instr_bstr(ctx, OP_assign_ident, stat->member_expr->identifier);
}
return hres;
}
static BOOL lookup_dim_decls(compile_ctx_t *ctx, const WCHAR *name)
{
dim_decl_t *dim_decl;
for(dim_decl = ctx->dim_decls; dim_decl; dim_decl = dim_decl->next) {
if(!strcmpiW(dim_decl->name, name))
return TRUE;
}
return FALSE;
}
static HRESULT compile_dim_statement(compile_ctx_t *ctx, dim_statement_t *stat)
{
dim_decl_t *dim_decl = stat->dim_decls;
while(1) {
if(lookup_dim_decls(ctx, dim_decl->name)) {
FIXME("dim %s name redefined\n", debugstr_w(dim_decl->name));
return E_FAIL;
}
if(!dim_decl->next)
break;
dim_decl = dim_decl->next;
}
dim_decl->next = ctx->dim_decls;
ctx->dim_decls = stat->dim_decls;
return S_OK;
}
static HRESULT compile_statement(compile_ctx_t *ctx, statement_t *stat)
{
HRESULT hres;
while(stat) {
switch(stat->type) {
case STAT_ASSIGN:
hres = compile_assign_statement(ctx, (assign_statement_t*)stat);
break;
case STAT_CALL:
hres = compile_member_expression(ctx, ((call_statement_t*)stat)->expr, FALSE);
break;
case STAT_DIM:
hres = compile_dim_statement(ctx, (dim_statement_t*)stat);
break;
case STAT_IF:
hres = compile_if_statement(ctx, (if_statement_t*)stat);
break;
default:
FIXME("Unimplemented statement type %d\n", stat->type);
hres = E_NOTIMPL;
}
if(FAILED(hres))
return hres;
stat = stat->next;
}
return S_OK;
}
static void resolve_labels(compile_ctx_t *ctx)
{
instr_t *instr;
for(instr = ctx->code->instrs; instr < ctx->code->instrs+ctx->instr_cnt; instr++) {
if(instr_info[instr->op].arg1_type == ARG_ADDR && (instr->arg1.uint & LABEL_FLAG)) {
assert((instr->arg1.uint & ~LABEL_FLAG) < ctx->labels_cnt);
instr->arg1.uint = ctx->labels[instr->arg1.uint & ~LABEL_FLAG];
}
assert(instr_info[instr->op].arg2_type != ARG_ADDR);
}
ctx->labels_cnt = 0;
}
static HRESULT compile_func(compile_ctx_t *ctx, statement_t *stat, function_t *func)
{
HRESULT hres;
func->code_off = ctx->instr_cnt;
hres = compile_statement(ctx, stat);
if(FAILED(hres))
return hres;
if(push_instr(ctx, OP_ret) == -1)
return E_OUTOFMEMORY;
resolve_labels(ctx);
if(ctx->dim_decls) {
dim_decl_t *dim_decl;
dynamic_var_t *new_var;
for(dim_decl = ctx->dim_decls; dim_decl; dim_decl = dim_decl->next) {
new_var = compiler_alloc(ctx->code, sizeof(*new_var));
if(!new_var)
return E_OUTOFMEMORY;
new_var->name = compiler_alloc_string(ctx->code, dim_decl->name);
if(!new_var->name)
return E_OUTOFMEMORY;
V_VT(&new_var->v) = VT_EMPTY;
new_var->next = ctx->global_vars;
ctx->global_vars = new_var;
}
}
return S_OK;
}
static BOOL lookup_script_identifier(script_ctx_t *script, const WCHAR *identifier)
{
dynamic_var_t *var;
for(var = script->global_vars; var; var = var->next) {
if(!strcmpiW(var->name, identifier))
return TRUE;
}
return FALSE;
}
static HRESULT check_script_collisions(compile_ctx_t *ctx, script_ctx_t *script)
{
dynamic_var_t *var;
for(var = ctx->global_vars; var; var = var->next) {
if(lookup_script_identifier(script, var->name)) {
FIXME("%s: redefined\n", debugstr_w(var->name));
return E_FAIL;
}
}
return S_OK;
}
void release_vbscode(vbscode_t *code)
{
unsigned i;
list_remove(&code->entry);
for(i=0; i < code->bstr_cnt; i++)
SysFreeString(code->bstr_pool[i]);
vbsheap_free(&code->heap);
heap_free(code->bstr_pool);
heap_free(code->source);
heap_free(code->instrs);
heap_free(code);
}
static vbscode_t *alloc_vbscode(compile_ctx_t *ctx, const WCHAR *source)
{
vbscode_t *ret;
ret = heap_alloc(sizeof(*ret));
if(!ret)
return NULL;
ret->source = heap_strdupW(source);
if(!ret->source) {
heap_free(ret);
return NULL;
}
ret->instrs = heap_alloc(32*sizeof(instr_t));
if(!ret->instrs) {
release_vbscode(ret);
return NULL;
}
ctx->instr_cnt = 0;
ctx->instr_size = 32;
vbsheap_init(&ret->heap);
ret->option_explicit = ctx->parser.option_explicit;
ret->bstr_pool = NULL;
ret->bstr_pool_size = 0;
ret->bstr_cnt = 0;
ret->global_code.code_ctx = ret;
list_init(&ret->entry);
return ret;
}
HRESULT compile_script(script_ctx_t *script, const WCHAR *src, vbscode_t **ret)
{
compile_ctx_t ctx;
HRESULT hres;
hres = parse_script(&ctx.parser, src);
if(FAILED(hres))
return hres;
ctx.code = alloc_vbscode(&ctx, src);
if(!ctx.code)
return E_OUTOFMEMORY;
ctx.global_vars = NULL;
ctx.dim_decls = NULL;
ctx.labels = NULL;
ctx.labels_cnt = ctx.labels_size = 0;
hres = compile_func(&ctx, ctx.parser.stats, &ctx.code->global_code);
if(FAILED(hres)) {
release_vbscode(ctx.code);
return hres;
}
hres = check_script_collisions(&ctx, script);
if(FAILED(hres)) {
release_vbscode(ctx.code);
return hres;
}
if(ctx.global_vars) {
dynamic_var_t *var;
for(var = ctx.global_vars; var->next; var = var->next);
var->next = script->global_vars;
script->global_vars = ctx.global_vars;
}
parser_release(&ctx.parser);
if(TRACE_ON(vbscript_disas))
dump_code(&ctx);
list_add_tail(&script->code_list, &ctx.code->entry);
*ret = ctx.code;
return S_OK;
}
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