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vbscript: Added function call statement parsing beginning implementation.
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91cc7bd719
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6c5570297e
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@ -53,13 +53,18 @@ static unsigned push_instr(compile_ctx_t *ctx, vbsop_t op)
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return ctx->instr_cnt++;
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}
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static HRESULT compile_func(compile_ctx_t *ctx, function_t *func)
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static HRESULT compile_func(compile_ctx_t *ctx, statement_t *stat, function_t *func)
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{
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func->code_off = ctx->instr_cnt;
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if(push_instr(ctx, OP_ret) == -1)
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return E_OUTOFMEMORY;
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if(stat) {
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FIXME("statements compilation not implemented\n");
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return E_NOTIMPL;
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}
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return S_OK;
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}
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@ -113,7 +118,7 @@ HRESULT compile_script(script_ctx_t *script, const WCHAR *src, vbscode_t **ret)
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if(!ctx.code)
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return E_OUTOFMEMORY;
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hres = compile_func(&ctx, &ctx.code->global_code);
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hres = compile_func(&ctx, ctx.parser.stats, &ctx.code->global_code);
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if(FAILED(hres)) {
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release_vbscode(ctx.code);
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return hres;
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@ -16,6 +16,36 @@
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* Foundation, Inc., 51 Franklin St, Fifth Floor, Boston, MA 02110-1301, USA
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*/
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typedef enum {
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EXPR_MEMBER
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} expression_type_t;
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typedef struct _expression_t {
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expression_type_t type;
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struct _expression_t *next;
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} expression_t;
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typedef struct {
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expression_t expr;
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expression_t *obj_expr;
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const WCHAR *identifier;
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expression_t *args;
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} member_expression_t;
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typedef enum {
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STAT_CALL
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} statement_type_t;
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typedef struct _statement_t {
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statement_type_t type;
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struct _statement_t *next;
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} statement_t;
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typedef struct {
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statement_t stat;
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member_expression_t *expr;
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} call_statement_t;
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typedef struct {
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const WCHAR *code;
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const WCHAR *ptr;
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@ -26,6 +56,9 @@ typedef struct {
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int last_token;
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unsigned last_nl;
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statement_t *stats;
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statement_t *stats_tail;
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} parser_ctx_t;
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HRESULT parse_script(parser_ctx_t*,const WCHAR*) DECLSPEC_HIDDEN;
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@ -33,6 +33,12 @@ static int parser_error(const char*);
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static void parse_complete(parser_ctx_t*);
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static void source_add_statement(parser_ctx_t*,statement_t*);
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static member_expression_t *new_member_expression(parser_ctx_t*,expression_t*,const WCHAR*);
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static statement_t *new_call_statement(parser_ctx_t*,member_expression_t*);
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%}
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%pure_parser
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@ -40,14 +46,34 @@ static void parse_complete(parser_ctx_t*);
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%union {
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const WCHAR *string;
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statement_t *statement;
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member_expression_t *member;
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}
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%token tEOF tNL
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%token tEOF tNL blah
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%token <string> tIdentifier
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%type <statement> Statement StatementNl
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%type <member> MemberExpression
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%%
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Program : tEOF { parse_complete(ctx); }
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Program
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: SourceElements tEOF { parse_complete(ctx); }
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SourceElements
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: /* empty */
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| SourceElements StatementNl { source_add_statement(ctx, $2); }
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StatementNl
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: Statement tNL { $$ = $1; }
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Statement
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: MemberExpression /* FIXME: Arguments_opt */ { $$ = new_call_statement(ctx, $1); }
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MemberExpression
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: tIdentifier { $$ = new_member_expression(ctx, NULL, $1); }
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/* FIXME: MemberExpressionArgs '.' tIdentifier */
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%%
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@ -56,11 +82,73 @@ static int parser_error(const char *str)
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return 0;
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}
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static void source_add_statement(parser_ctx_t *ctx, statement_t *stat)
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{
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if(ctx->stats) {
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ctx->stats_tail->next = stat;
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ctx->stats_tail = stat;
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}else {
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ctx->stats = ctx->stats_tail = stat;
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}
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}
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static void parse_complete(parser_ctx_t *ctx)
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{
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ctx->parse_complete = TRUE;
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}
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static void *new_expression(parser_ctx_t *ctx, expression_type_t type, unsigned size)
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{
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expression_t *expr;
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expr = parser_alloc(ctx, size ? size : sizeof(*expr));
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if(expr) {
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expr->type = type;
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expr->next = NULL;
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}
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return expr;
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}
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static member_expression_t *new_member_expression(parser_ctx_t *ctx, expression_t *obj_expr, const WCHAR *identifier)
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{
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member_expression_t *expr;
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expr = new_expression(ctx, EXPR_MEMBER, sizeof(*expr));
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if(!expr)
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return NULL;
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expr->obj_expr = obj_expr;
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expr->identifier = identifier;
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expr->args = NULL;
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return expr;
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}
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static void *new_statement(parser_ctx_t *ctx, statement_type_t type, unsigned size)
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{
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statement_t *stat;
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stat = parser_alloc(ctx, size);
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if(stat) {
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stat->type = type;
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stat->next = NULL;
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}
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return stat;
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}
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static statement_t *new_call_statement(parser_ctx_t *ctx, member_expression_t *expr)
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{
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call_statement_t *stat;
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stat = new_statement(ctx, STAT_CALL, sizeof(*stat));
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if(!stat)
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return NULL;
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stat->expr = expr;
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return &stat->stat;
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}
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void *parser_alloc(parser_ctx_t *ctx, size_t size)
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{
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void *ret;
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@ -82,6 +170,7 @@ HRESULT parse_script(parser_ctx_t *ctx, const WCHAR *code)
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ctx->last_token = tNL;
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ctx->last_nl = 0;
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ctx->stats = ctx->stats_tail = NULL;
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parser_parse(ctx);
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