root/interface.c

DEFINITIONS

1. CRB_create_interpreter
2. show_error_stack_trace
3. do_compile
4. CRB_compile
5. CRB_compile_string
6. CRB_set_command_line_args
7. CRB_interpret
8. release_global_strings
9. CRB_dispose_interpreter
10. CRB_add_native_function

#include "MEM.h"
#include "DBG.h"
#define GLOBAL_VARIABLE_DEFINE
#include "crowbar.h"

CRB_Interpreter *
CRB_create_interpreter(void)
{
    MEM_Storage storage;
    CRB_Interpreter *interpreter;
#ifndef MINICROWBAR
    extern void crb_compile_built_in_script(CRB_Interpreter *inter);
#endif /* MINICROWBAR */

    storage = MEM_open_storage(0);
    interpreter = MEM_storage_malloc(storage,
                                     sizeof(struct CRB_Interpreter_tag));
    interpreter->interpreter_storage = storage;
    interpreter->execute_storage = MEM_open_storage(0);
    interpreter->variable = NULL;
    interpreter->function_list = NULL;
    interpreter->statement_list = NULL;
    interpreter->current_line_number = 1;
    interpreter->stack.stack_alloc_size = 0;
    interpreter->stack.stack_pointer = 0;
    interpreter->stack.stack
        = MEM_malloc(sizeof(CRB_Value) * STACK_ALLOC_SIZE);
    interpreter->heap.current_heap_size = 0;
    interpreter->heap.current_threshold = HEAP_THRESHOLD_SIZE;
    interpreter->heap.header = NULL;
    interpreter->top_environment = NULL;
    interpreter->current_exception.type = CRB_NULL_VALUE;
    interpreter->input_mode = CRB_FILE_INPUT_MODE;
    interpreter->regexp_literals = NULL;

    crb_set_current_interpreter(interpreter);
    crb_add_native_functions(interpreter);
    crb_add_regexp_functions(interpreter);

#ifndef MINICROWBAR
    crb_compile_built_in_script(interpreter);
#endif /* MINICROWBAR */

    return interpreter;
}

static void
show_error_stack_trace(CRB_Interpreter *inter)
{
    int error_code;
    CRB_Object *exception;
    CRB_Value *func;

    if ((error_code = setjmp(inter->current_recovery_environment.environment))
        == 0) {
        if (inter->current_exception.type != CRB_ASSOC_VALUE) {
            crb_runtime_error(inter, NULL, 0,
                              EXCEPTION_IS_NOT_ASSOC_ERR,
                              CRB_MESSAGE_ARGUMENT_END);
        }
        exception = inter->current_exception.u.object;
        func = CRB_search_assoc_member(exception,
                                       EXCEPTION_MEMBER_PRINT_STACK_TRACE);
        if (func == NULL) {
            crb_runtime_error(inter, NULL, 0,
                              EXCEPTION_HAS_NO_PRINT_STACK_TRACE_METHOD_ERR,
                              CRB_MESSAGE_ARGUMENT_END);
        }
        if (func->type != CRB_CLOSURE_VALUE) {
            crb_runtime_error(inter, NULL, 0,
                              PRINT_STACK_TRACE_IS_NOT_CLOSURE_ERR,
                              CRB_MESSAGE_ARGUMENT_END);
        }
        CRB_call_function(inter, NULL, 0, func, 0, NULL);
    } else {
        fprintf(stderr, "Exception occured in print_stack_trace.\n");
        show_error_stack_trace(inter);
    }
}

static void do_compile(CRB_Interpreter *inter)
{
    extern int yyparse(void);
    int error_code;

    if ((error_code = setjmp(inter->current_recovery_environment.environment))
        == 0) {
        if (yyparse()) {
            fprintf(stderr, "Error ! Error ! Error !\n");
            exit(1);
        }
    } else {
        show_error_stack_trace(inter);

        crb_set_stack_pointer(inter, 0);
        inter->current_exception.type = CRB_NULL_VALUE;
    }
    crb_garbage_collect(inter);
}

void
CRB_compile(CRB_Interpreter *interpreter, FILE *fp)
{
    extern FILE *yyin;

    crb_set_current_interpreter(interpreter);
    interpreter->current_line_number = 1;
    interpreter->input_mode = CRB_FILE_INPUT_MODE;

    yyin = fp;

    do_compile(interpreter);

    crb_reset_string_literal_buffer();
}

void
CRB_compile_string(CRB_Interpreter *interpreter, char **lines)
{
    extern int yyparse(void);

    crb_set_current_interpreter(interpreter);
    crb_set_source_string(lines);
    interpreter->current_line_number = 1;
    interpreter->input_mode = CRB_STRING_INPUT_MODE;

    do_compile(interpreter);

    crb_reset_string_literal_buffer();
}

void
CRB_set_command_line_args(CRB_Interpreter *interpreter,
                          int argc, char **argv)
{
    int i;
    CRB_Char *wc_str;
    CRB_Value args;
    CRB_Value elem;

    args.type = CRB_ARRAY_VALUE;
    args.u.object = CRB_create_array(interpreter, argc);
    CRB_push_value(interpreter, &args);

    for (i = 0; i < argc; i++) {
        wc_str = CRB_mbstowcs_alloc(interpreter, NULL, 0, argv[i]);
        if (wc_str == NULL) {
            fprintf(stderr, "bad command line argument(%dth)", i);
            return;
        }
        elem.type = CRB_STRING_VALUE;
        elem.u.object = CRB_create_crowbar_string(interpreter, wc_str);
        CRB_array_set(interpreter, NULL, args.u.object, i, &elem);
    }

    CRB_add_global_variable(interpreter, "ARGS", &args);

    CRB_pop_value(interpreter);
}

void
CRB_interpret(CRB_Interpreter *interpreter)
{
    int error_code;

    crb_add_std_fp(interpreter);

    if ((error_code = setjmp(interpreter
                             ->current_recovery_environment.environment))
        == 0) {
        crb_execute_statement_list(interpreter, NULL,
                                   interpreter->statement_list);
    } else {
        show_error_stack_trace(interpreter);

        crb_set_stack_pointer(interpreter, 0);
        interpreter->current_exception.type = CRB_NULL_VALUE;
    }
    crb_garbage_collect(interpreter);
}

static void
release_global_strings(CRB_Interpreter *interpreter) {
    while (interpreter->variable) {
        Variable *temp = interpreter->variable;
        interpreter->variable = temp->next;
    }
}

void
CRB_dispose_interpreter(CRB_Interpreter *interpreter)
{
    release_global_strings(interpreter);

    if (interpreter->execute_storage) {
        MEM_dispose_storage(interpreter->execute_storage);
    }
    interpreter->variable = NULL;
    crb_garbage_collect(interpreter);
    DBG_assert(interpreter->heap.current_heap_size == 0,
               ("%d bytes leaked.\n", interpreter->heap.current_heap_size));
    MEM_free(interpreter->stack.stack);
    crb_dispose_regexp_literals(interpreter);
    MEM_dispose_storage(interpreter->interpreter_storage);
}

CRB_FunctionDefinition *
CRB_add_native_function(CRB_Interpreter *interpreter,
                        char *name, CRB_NativeFunctionProc *proc)
{
    CRB_FunctionDefinition *fd;

    fd = crb_malloc(sizeof(CRB_FunctionDefinition));
    fd->name = name;
    fd->type = CRB_NATIVE_FUNCTION_DEFINITION;
    fd->is_closure = CRB_FALSE;
    fd->u.native_f.proc = proc;
    fd->next = interpreter->function_list;

    interpreter->function_list = fd;

    return fd;
}