WsBool ws_encode_buffer(WsBuffer *buffer, ...)
{
va_list ap;
WsEncodingSpec spec;
int ival;
unsigned char *p;
unsigned char *cp;
size_t len;
WsUInt32 ui32;
unsigned char data[64];
va_start(ap, buffer);
while ((spec = va_arg(ap, int)) != WS_ENC_END)
{
switch (spec)
{
case WS_ENC_BYTE:
case WS_ENC_INT8:
case WS_ENC_UINT8:
ival = va_arg(ap, int);
if (!ws_buffer_append_space(buffer, &p, 1))
goto error;
WS_PUT_UINT8(p, ival);
break;
case WS_ENC_INT16:
case WS_ENC_UINT16:
ival = va_arg(ap, int);
if (!ws_buffer_append_space(buffer, &p, 2))
goto error;
WS_PUT_UINT16(p, ival);
break;
case WS_ENC_INT32:
case WS_ENC_UINT32:
ival = va_arg(ap, long);
if (!ws_buffer_append_space(buffer, &p, 4))
goto error;
WS_PUT_UINT32(p, ival);
break;
case WS_ENC_MB_UINT16:
case WS_ENC_MB_UINT32:
if (spec == WS_ENC_MB_UINT16)
ui32 = va_arg(ap, int);
else
ui32 = va_arg(ap, long);
len = sizeof(data);
cp = ws_encode_mb_uint32(ui32, data, &len);
if (!ws_buffer_append_space(buffer, &p, len))
goto error;
memcpy(p, cp, len);
break;
case WS_ENC_DATA:
cp = va_arg(ap, unsigned char *);
len = va_arg(ap, unsigned int);
if (!ws_buffer_append_space(buffer, &p, len))
goto error;
memcpy(p, cp, len);
break;
default:
ws_fatal("ws_encode_buffer(): unknown type %d: probably a missing "
"WS_ENC_END",
spec);
break;
}
}
WsBool ws_bc_encode(WsBc *bc, unsigned char **data_return,
size_t *data_len_return)
{
WsBuffer buffer;
WsUInt32 ui;
unsigned char data[64];
unsigned char *p, *mb;
size_t len;
ws_buffer_init(&buffer);
/* Append space for the header. We do not know yet the size of the
resulting byte-code. */
if (!ws_buffer_append_space(&buffer, NULL, WS_BC_MAX_HEADER_LEN))
goto error;
/* Constants. */
if (!ws_encode_buffer(&buffer,
WS_ENC_MB_UINT16, bc->num_constants,
WS_ENC_MB_UINT16, (WsUInt16) bc->string_encoding,
WS_ENC_END))
goto error;
for (ui = 0 ; ui < bc->num_constants; ui++) {
switch (bc->constants[ui].type) {
case WS_BC_CONST_TYPE_INT:
if (WS_INT8_MIN <= bc->constants[ui].u.v_int
&& bc->constants[ui].u.v_int <= WS_INT8_MAX) {
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8, (WsUInt8) WS_BC_CONST_INT8,
WS_ENC_INT8,
(WsInt8) bc->constants[ui].u.v_int,
WS_ENC_END))
goto error;
} else if (WS_INT16_MIN <= bc->constants[ui].u.v_int
&& bc->constants[ui].u.v_int <= WS_INT16_MAX) {
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8, (WsUInt8) WS_BC_CONST_INT16,
WS_ENC_INT16,
(WsInt16) bc->constants[ui].u.v_int,
WS_ENC_END))
goto error;
} else {
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8, (WsUInt8) WS_BC_CONST_INT32,
WS_ENC_INT32, bc->constants[ui].u.v_int,
WS_ENC_END))
goto error;
}
break;
case WS_BC_CONST_TYPE_FLOAT32:
case WS_BC_CONST_TYPE_FLOAT32_NAN:
case WS_BC_CONST_TYPE_FLOAT32_POSITIVE_INF:
case WS_BC_CONST_TYPE_FLOAT32_NEGATIVE_INF:
switch (bc->constants[ui].type) {
case WS_BC_CONST_TYPE_FLOAT32:
ws_ieee754_encode_single(bc->constants[ui].u.v_float, data);
p = data;
break;
case WS_BC_CONST_TYPE_FLOAT32_NAN:
p = ws_ieee754_nan;
break;
case WS_BC_CONST_TYPE_FLOAT32_POSITIVE_INF:
p = ws_ieee754_positive_inf;
break;
case WS_BC_CONST_TYPE_FLOAT32_NEGATIVE_INF:
p = ws_ieee754_negative_inf;
break;
default:
ws_fatal("ws_bc_encode(): internal inconsistency");
/* NOTREACHED */
p = NULL; /* Initialized to keep compiler quiet. */
break;
}
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8, (WsUInt8) WS_BC_CONST_FLOAT32,
WS_ENC_DATA, p, 4,
WS_ENC_END))
goto error;
break;
break;
case WS_BC_CONST_TYPE_UTF8_STRING:
/* Encode the strings as requested. */
switch (bc->string_encoding) {
case WS_BC_STRING_ENC_ISO_8859_1:
{
WsUtf8String *string = ws_utf8_alloc();
unsigned char *latin1;
size_t latin1_len;
WsBool success;
if (string == NULL)
goto error;
/* Create an UTF-8 string. */
if (!ws_utf8_set_data(string,
bc->constants[ui].u.v_string.data,
bc->constants[ui].u.v_string.len)) {
ws_utf8_free(string);
goto error;
}
/* Convert it to latin1. */
latin1 = ws_utf8_to_latin1(string, '?', &latin1_len);
/* We'r done with the UTF-8 string. */
ws_utf8_free(string);
if (latin1 == NULL)
goto error;
/* Encode it. */
success = ws_encode_buffer(
&buffer,
WS_ENC_UINT8,
(WsUInt8) WS_BC_CONST_EXT_ENC_STRING,
WS_ENC_MB_UINT32, (WsUInt32) latin1_len,
WS_ENC_DATA, latin1, latin1_len,
WS_ENC_END);
ws_utf8_free_data(latin1);
if (!success)
goto error;
}
break;
case WS_BC_STRING_ENC_UTF8:
if (!ws_encode_buffer(
&buffer,
WS_ENC_UINT8,
(WsUInt8) WS_BC_CONST_UTF8_STRING,
WS_ENC_MB_UINT32,
(WsUInt32) bc->constants[ui].u.v_string.len,
WS_ENC_DATA,
bc->constants[ui].u.v_string.data,
bc->constants[ui].u.v_string.len,
WS_ENC_END))
goto error;
break;
}
break;
case WS_BC_CONST_TYPE_EMPTY_STRING:
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8,
(WsUInt8) WS_BC_CONST_EMPTY_STRING,
WS_ENC_END))
goto error;
break;
}
}
/* Pragmas. */
if (!ws_encode_buffer(&buffer,
WS_ENC_MB_UINT16, bc->num_pragmas,
WS_ENC_END))
goto error;
for (ui = 0; ui < bc->num_pragmas; ui++) {
switch (bc->pragmas[ui].type) {
case WS_BC_PRAGMA_TYPE_ACCESS_DOMAIN:
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8,
(WsUInt8) WS_BC_PRAGMA_ACCESS_DOMAIN,
WS_ENC_MB_UINT16, bc->pragmas[ui].index_1,
WS_ENC_END))
goto error;
break;
case WS_BC_PRAGMA_TYPE_ACCESS_PATH:
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8,
(WsUInt8) WS_BC_PRAGMA_ACCESS_PATH,
WS_ENC_MB_UINT16, bc->pragmas[ui].index_1,
WS_ENC_END))
goto error;
break;
case WS_BC_PRAGMA_TYPE_USER_AGENT_PROPERTY:
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8,
(WsUInt8) WS_BC_PRAGMA_USER_AGENT_PROPERTY,
WS_ENC_MB_UINT16, bc->pragmas[ui].index_1,
WS_ENC_MB_UINT16, bc->pragmas[ui].index_2,
WS_ENC_END))
goto error;
break;
case WS_BC_PRAGMA_TYPE_USER_AGENT_PROPERTY_AND_SCHEME:
if (!ws_encode_buffer(
&buffer,
WS_ENC_UINT8,
(WsUInt8) WS_BC_PRAGMA_USER_AGENT_PROPERTY_AND_SCHEME,
WS_ENC_MB_UINT16, bc->pragmas[ui].index_1,
WS_ENC_MB_UINT16, bc->pragmas[ui].index_2,
WS_ENC_MB_UINT16, bc->pragmas[ui].index_3,
WS_ENC_END))
goto error;
break;
}
}
/* Function pool. */
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8, bc->num_functions,
WS_ENC_END))
goto error;
/* Function names. */
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8, bc->num_function_names,
WS_ENC_END))
goto error;
for (ui = 0; ui < bc->num_function_names; ui++) {
size_t name_len = strlen(bc->function_names[ui].name);
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8, bc->function_names[ui].index,
WS_ENC_UINT8, (WsUInt8) name_len,
WS_ENC_DATA, bc->function_names[ui].name, name_len,
WS_ENC_END))
goto error;
}
/* Functions. */
for (ui = 0; ui < bc->num_functions; ui++) {
if (!ws_encode_buffer(&buffer,
WS_ENC_UINT8, bc->functions[ui].num_arguments,
WS_ENC_UINT8, bc->functions[ui].num_locals,
WS_ENC_MB_UINT32, bc->functions[ui].code_size,
WS_ENC_DATA, bc->functions[ui].code,
(size_t) bc->functions[ui].code_size,
WS_ENC_END))
goto error;
}
/* Fix the byte-code header. */
p = ws_buffer_ptr(&buffer);
/* Encode the size of the byte-code excluding the byte-code header. */
mb = ws_encode_mb_uint32(ws_buffer_len(&buffer) - WS_BC_MAX_HEADER_LEN,
data, &len);
memcpy(p + WS_BC_MAX_HEADER_LEN - len, mb, len);
/* Set the byte-code file version information. */
WS_PUT_UINT8(p + WS_BC_MAX_HEADER_LEN - len - 1, WS_BC_VERSION);
/* Calculate the beginning of the bc-array and its size. */
*data_return = p + WS_BC_MAX_HEADER_LEN - len - 1;
*data_len_return = ws_buffer_len(&buffer) - WS_BC_MAX_HEADER_LEN + len + 1;
/* All done. */
return WS_TRUE;
/*
* Error handling.
*/
error:
ws_buffer_uninit(&buffer);
*data_return = NULL;
*data_len_return = 0;
return WS_FALSE;
}