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jerryscript/jerry-core/parser/js/js-parser-util.c
Daniel Vince 37b7645e6a Rework ES2015 module system and add missing features. (#2792) 
Co-authored-by: Dániel Bátyai <dbatyai@inf.u-szeged.hu>
JerryScript-DCO-1.0-Signed-off-by: Dániel Bátyai dbatyai@inf.u-szeged.hu
JerryScript-DCO-1.0-Signed-off-by: Daniel Vince vinced@inf.u-szeged.hu
2019-04-25 14:57:17 +02:00

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/* Copyright JS Foundation and other contributors, http://js.foundation
*
* Licensed under the Apache License, Version 2.0 (the "License");
* you may not use this file except in compliance with the License.
* You may obtain a copy of the License at
*
* http://www.apache.org/licenses/LICENSE-2.0
*
* Unless required by applicable law or agreed to in writing, software
* distributed under the License is distributed on an "AS IS" BASIS
* WITHOUT WARRANTIES OR CONDITIONS OF ANY KIND, either express or implied.
* See the License for the specific language governing permissions and
* limitations under the License.
*/
#include "js-parser-internal.h"
#ifndef JERRY_DISABLE_JS_PARSER
#ifdef JERRY_ENABLE_LINE_INFO
#include "jcontext.h"
#endif /* JERRY_ENABLE_LINE_INFO */
/** \addtogroup parser Parser
* @{
*
* \addtogroup jsparser JavaScript
* @{
*
* \addtogroup jsparser_utils Utility
* @{
*/
/**********************************************************************/
/* Emitting byte codes */
/**********************************************************************/
/**
* Append two bytes to the cbc stream.
*/
static void
parser_emit_two_bytes (parser_context_t *context_p, /**< context */
uint8_t first_byte, /**< first byte */
uint8_t second_byte) /**< second byte */
{
uint32_t last_position = context_p->byte_code.last_position;
if (last_position + 2 <= PARSER_CBC_STREAM_PAGE_SIZE)
{
parser_mem_page_t *page_p = context_p->byte_code.last_p;
page_p->bytes[last_position] = first_byte;
page_p->bytes[last_position + 1] = second_byte;
context_p->byte_code.last_position = last_position + 2;
}
else if (last_position >= PARSER_CBC_STREAM_PAGE_SIZE)
{
parser_mem_page_t *page_p;
parser_cbc_stream_alloc_page (context_p, &context_p->byte_code);
page_p = context_p->byte_code.last_p;
page_p->bytes[0] = first_byte;
page_p->bytes[1] = second_byte;
context_p->byte_code.last_position = 2;
}
else
{
context_p->byte_code.last_p->bytes[PARSER_CBC_STREAM_PAGE_SIZE - 1] = first_byte;
parser_cbc_stream_alloc_page (context_p, &context_p->byte_code);
context_p->byte_code.last_p->bytes[0] = second_byte;
context_p->byte_code.last_position = 1;
}
} /* parser_emit_two_bytes */
/**
* Append byte to the end of the current byte code stream.
*
* @param context_p parser context
* @param byte byte
*/
#define PARSER_APPEND_TO_BYTE_CODE(context_p, byte) \
if ((context_p)->byte_code.last_position >= PARSER_CBC_STREAM_PAGE_SIZE) \
{ \
parser_cbc_stream_alloc_page ((context_p), &(context_p)->byte_code); \
} \
(context_p)->byte_code.last_p->bytes[(context_p)->byte_code.last_position++] = (uint8_t) (byte)
/**
* Append the current byte code to the stream
*/
void
parser_flush_cbc (parser_context_t *context_p) /**< context */
{
uint8_t flags;
uint16_t last_opcode = context_p->last_cbc_opcode;
if (last_opcode == PARSER_CBC_UNAVAILABLE)
{
return;
}
context_p->status_flags |= PARSER_NO_END_LABEL;
if (PARSER_IS_BASIC_OPCODE (last_opcode))
{
cbc_opcode_t opcode = (cbc_opcode_t) last_opcode;
JERRY_ASSERT (opcode < CBC_END);
flags = cbc_flags[opcode];
PARSER_APPEND_TO_BYTE_CODE (context_p, opcode);
context_p->byte_code_size++;
}
else
{
cbc_ext_opcode_t opcode = (cbc_ext_opcode_t) PARSER_GET_EXT_OPCODE (last_opcode);
JERRY_ASSERT (opcode < CBC_EXT_END);
flags = cbc_ext_flags[opcode];
parser_emit_two_bytes (context_p, CBC_EXT_OPCODE, (uint8_t) opcode);
context_p->byte_code_size += 2;
}
JERRY_ASSERT ((flags >> CBC_STACK_ADJUST_SHIFT) >= CBC_STACK_ADJUST_BASE
|| (CBC_STACK_ADJUST_BASE - (flags >> CBC_STACK_ADJUST_SHIFT)) <= context_p->stack_depth);
PARSER_PLUS_EQUAL_U16 (context_p->stack_depth, CBC_STACK_ADJUST_VALUE (flags));
if (flags & (CBC_HAS_LITERAL_ARG | CBC_HAS_LITERAL_ARG2))
{
uint16_t literal_index = context_p->last_cbc.literal_index;
parser_emit_two_bytes (context_p,
(uint8_t) (literal_index & 0xff),
(uint8_t) (literal_index >> 8));
context_p->byte_code_size += 2;
}
if (flags & CBC_HAS_LITERAL_ARG2)
{
uint16_t literal_index = context_p->last_cbc.value;
parser_emit_two_bytes (context_p,
(uint8_t) (literal_index & 0xff),
(uint8_t) (literal_index >> 8));
context_p->byte_code_size += 2;
if (!(flags & CBC_HAS_LITERAL_ARG))
{
literal_index = context_p->last_cbc.third_literal_index;
parser_emit_two_bytes (context_p,
(uint8_t) (literal_index & 0xff),
(uint8_t) (literal_index >> 8));
context_p->byte_code_size += 2;
}
}
if (flags & CBC_HAS_BYTE_ARG)
{
uint8_t byte_argument = (uint8_t) context_p->last_cbc.value;
JERRY_ASSERT (context_p->last_cbc.value <= CBC_MAXIMUM_BYTE_VALUE);
if (flags & CBC_POP_STACK_BYTE_ARG)
{
JERRY_ASSERT (context_p->stack_depth >= byte_argument);
PARSER_MINUS_EQUAL_U16 (context_p->stack_depth, byte_argument);
}
PARSER_APPEND_TO_BYTE_CODE (context_p, byte_argument);
context_p->byte_code_size++;
}
#ifdef PARSER_DUMP_BYTE_CODE
if (context_p->is_show_opcodes)
{
JERRY_DEBUG_MSG (" [%3d] %s",
(int) context_p->stack_depth,
PARSER_IS_BASIC_OPCODE (last_opcode) ? cbc_names[last_opcode]
: cbc_ext_names[PARSER_GET_EXT_OPCODE (last_opcode)]);
if (flags & (CBC_HAS_LITERAL_ARG | CBC_HAS_LITERAL_ARG2))
{
uint16_t literal_index = context_p->last_cbc.literal_index;
lexer_literal_t *literal_p = PARSER_GET_LITERAL (literal_index);
JERRY_DEBUG_MSG (" idx:%d->", literal_index);
util_print_literal (literal_p);
}
if (flags & CBC_HAS_LITERAL_ARG2)
{
uint16_t literal_index = context_p->last_cbc.value;
lexer_literal_t *literal_p = PARSER_GET_LITERAL (literal_index);
JERRY_DEBUG_MSG (" idx:%d->", literal_index);
util_print_literal (literal_p);
if (!(flags & CBC_HAS_LITERAL_ARG))
{
literal_index = context_p->last_cbc.third_literal_index;
literal_p = PARSER_GET_LITERAL (literal_index);
JERRY_DEBUG_MSG (" idx:%d->", literal_index);
util_print_literal (literal_p);
}
}
if (flags & CBC_HAS_BYTE_ARG)
{
if ((last_opcode == CBC_PUSH_NUMBER_POS_BYTE)
|| (last_opcode == PARSER_TO_EXT_OPCODE (CBC_EXT_PUSH_LITERAL_PUSH_NUMBER_POS_BYTE)))
{
JERRY_DEBUG_MSG (" number:%d", (int) context_p->last_cbc.value + 1);
}
else if ((last_opcode == CBC_PUSH_NUMBER_NEG_BYTE)
|| (last_opcode == PARSER_TO_EXT_OPCODE (CBC_EXT_PUSH_LITERAL_PUSH_NUMBER_NEG_BYTE)))
{
JERRY_DEBUG_MSG (" number:%d", -((int) context_p->last_cbc.value + 1));
}
else
{
JERRY_DEBUG_MSG (" byte_arg:%d", (int) context_p->last_cbc.value);
}
}
JERRY_DEBUG_MSG ("\n");
}
#endif /* PARSER_DUMP_BYTE_CODE */
if (context_p->stack_depth > context_p->stack_limit)
{
context_p->stack_limit = context_p->stack_depth;
if (context_p->stack_limit > PARSER_MAXIMUM_STACK_LIMIT)
{
parser_raise_error (context_p, PARSER_ERR_STACK_LIMIT_REACHED);
}
}
context_p->last_cbc_opcode = PARSER_CBC_UNAVAILABLE;
} /* parser_flush_cbc */
/**
* Append a byte code
*/
void
parser_emit_cbc (parser_context_t *context_p, /**< context */
uint16_t opcode) /**< opcode */
{
JERRY_ASSERT (PARSER_ARGS_EQ (opcode, 0));
if (context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
parser_flush_cbc (context_p);
}
context_p->last_cbc_opcode = opcode;
} /* parser_emit_cbc */
/**
* Append a byte code with a literal argument
*/
void
parser_emit_cbc_literal (parser_context_t *context_p, /**< context */
uint16_t opcode, /**< opcode */
uint16_t literal_index) /**< literal index */
{
JERRY_ASSERT (PARSER_ARGS_EQ (opcode, CBC_HAS_LITERAL_ARG));
if (context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
parser_flush_cbc (context_p);
}
context_p->last_cbc_opcode = opcode;
context_p->last_cbc.literal_index = literal_index;
context_p->last_cbc.literal_type = LEXER_UNUSED_LITERAL;
context_p->last_cbc.literal_object_type = LEXER_LITERAL_OBJECT_ANY;
} /* parser_emit_cbc_literal */
/**
* Append a byte code with the current literal argument
*/
void
parser_emit_cbc_literal_from_token (parser_context_t *context_p, /**< context */
uint16_t opcode) /**< opcode */
{
JERRY_ASSERT (PARSER_ARGS_EQ (opcode, CBC_HAS_LITERAL_ARG));
if (context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
parser_flush_cbc (context_p);
}
context_p->last_cbc_opcode = opcode;
context_p->last_cbc.literal_index = context_p->lit_object.index;
context_p->last_cbc.literal_type = context_p->token.lit_location.type;
context_p->last_cbc.literal_object_type = context_p->lit_object.type;
} /* parser_emit_cbc_literal_from_token */
/**
* Append a byte code with a call argument
*/
void
parser_emit_cbc_call (parser_context_t *context_p, /**< context */
uint16_t opcode, /**< opcode */
size_t call_arguments) /**< number of arguments */
{
JERRY_ASSERT (PARSER_ARGS_EQ (opcode, CBC_HAS_BYTE_ARG));
JERRY_ASSERT (call_arguments <= CBC_MAXIMUM_BYTE_VALUE);
if (context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
parser_flush_cbc (context_p);
}
context_p->last_cbc_opcode = opcode;
context_p->last_cbc.value = (uint16_t) call_arguments;
} /* parser_emit_cbc_call */
/**
* Append a push number 1/2 byte code
*/
void
parser_emit_cbc_push_number (parser_context_t *context_p, /**< context */
bool is_negative_number) /**< sign is negative */
{
uint16_t value = context_p->lit_object.index;
uint16_t lit_value = UINT16_MAX;
if (context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
if (context_p->last_cbc_opcode == CBC_PUSH_LITERAL)
{
lit_value = context_p->last_cbc.literal_index;
}
else
{
if (context_p->last_cbc_opcode == CBC_PUSH_TWO_LITERALS)
{
context_p->last_cbc_opcode = CBC_PUSH_LITERAL;
lit_value = context_p->last_cbc.value;
}
else if (context_p->last_cbc_opcode == CBC_PUSH_THREE_LITERALS)
{
context_p->last_cbc_opcode = CBC_PUSH_TWO_LITERALS;
lit_value = context_p->last_cbc.third_literal_index;
}
parser_flush_cbc (context_p);
}
}
if (value == 0)
{
if (lit_value == UINT16_MAX)
{
context_p->last_cbc_opcode = CBC_PUSH_NUMBER_0;
return;
}
context_p->last_cbc_opcode = PARSER_TO_EXT_OPCODE (CBC_EXT_PUSH_LITERAL_PUSH_NUMBER_0);
context_p->last_cbc.literal_index = lit_value;
return;
}
uint16_t opcode;
if (lit_value == UINT16_MAX)
{
opcode = (is_negative_number ? CBC_PUSH_NUMBER_NEG_BYTE
: CBC_PUSH_NUMBER_POS_BYTE);
JERRY_ASSERT (CBC_STACK_ADJUST_VALUE (PARSER_GET_FLAGS (opcode)) == 1);
}
else
{
opcode = PARSER_TO_EXT_OPCODE (is_negative_number ? CBC_EXT_PUSH_LITERAL_PUSH_NUMBER_NEG_BYTE
: CBC_EXT_PUSH_LITERAL_PUSH_NUMBER_POS_BYTE);
JERRY_ASSERT (CBC_STACK_ADJUST_VALUE (PARSER_GET_FLAGS (opcode)) == 2);
context_p->last_cbc.literal_index = lit_value;
}
JERRY_ASSERT (value > 0 && value <= CBC_PUSH_NUMBER_BYTE_RANGE_END);
context_p->last_cbc_opcode = opcode;
context_p->last_cbc.value = (uint16_t) (value - 1);
} /* parser_emit_cbc_push_number */
#ifdef JERRY_ENABLE_LINE_INFO
/**
* Append a line info data
*/
void
parser_emit_line_info (parser_context_t *context_p, /**< context */
uint32_t line, /**< current line */
bool flush_cbc) /**< flush last byte code */
{
if (JERRY_CONTEXT (resource_name) == ECMA_VALUE_UNDEFINED)
{
return;
}
if (flush_cbc && context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
parser_flush_cbc (context_p);
}
#ifdef PARSER_DUMP_BYTE_CODE
if (context_p->is_show_opcodes)
{
JERRY_DEBUG_MSG (" [%3d] CBC_EXT_LINE %d\n", (int) context_p->stack_depth, line);
}
#endif /* PARSER_DUMP_BYTE_CODE */
parser_emit_two_bytes (context_p, CBC_EXT_OPCODE, CBC_EXT_LINE);
context_p->byte_code_size += 2;
context_p->last_line_info_line = line;
const uint32_t max_shift_plus_7 = 7 * 5;
uint32_t shift = 7;
while (shift < max_shift_plus_7 && (line >> shift) > 0)
{
shift += 7;
}
do
{
shift -= 7;
uint8_t byte = (uint8_t) ((line >> shift) & CBC_LOWER_SEVEN_BIT_MASK);
if (shift > 0)
{
byte = (uint8_t) (byte | CBC_HIGHEST_BIT_MASK);
}
PARSER_APPEND_TO_BYTE_CODE (context_p, byte);
context_p->byte_code_size++;
}
while (shift > 0);
} /* parser_emit_line_info */
#endif /* JERRY_ENABLE_LINE_INFO */
/**
* Append a byte code with a branch argument
*/
void
parser_emit_cbc_forward_branch (parser_context_t *context_p, /**< context */
uint16_t opcode, /**< opcode */
parser_branch_t *branch_p) /**< branch result */
{
uint8_t flags;
uint32_t extra_byte_code_increase;
if (context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
parser_flush_cbc (context_p);
}
context_p->status_flags |= PARSER_NO_END_LABEL;
if (PARSER_IS_BASIC_OPCODE (opcode))
{
JERRY_ASSERT (opcode < CBC_END);
flags = cbc_flags[opcode];
extra_byte_code_increase = 0;
}
else
{
PARSER_APPEND_TO_BYTE_CODE (context_p, CBC_EXT_OPCODE);
opcode = (uint16_t) PARSER_GET_EXT_OPCODE (opcode);
JERRY_ASSERT (opcode < CBC_EXT_END);
flags = cbc_ext_flags[opcode];
extra_byte_code_increase = 1;
}
JERRY_ASSERT (flags & CBC_HAS_BRANCH_ARG);
JERRY_ASSERT (CBC_BRANCH_IS_FORWARD (flags));
JERRY_ASSERT (CBC_BRANCH_OFFSET_LENGTH (opcode) == 1);
/* Branch opcodes never push anything onto the stack. */
JERRY_ASSERT ((flags >> CBC_STACK_ADJUST_SHIFT) >= CBC_STACK_ADJUST_BASE
|| (CBC_STACK_ADJUST_BASE - (flags >> CBC_STACK_ADJUST_SHIFT)) <= context_p->stack_depth);
PARSER_PLUS_EQUAL_U16 (context_p->stack_depth, CBC_STACK_ADJUST_VALUE (flags));
#ifdef PARSER_DUMP_BYTE_CODE
if (context_p->is_show_opcodes)
{
JERRY_DEBUG_MSG (" [%3d] %s\n",
(int) context_p->stack_depth,
extra_byte_code_increase == 0 ? cbc_names[opcode] : cbc_ext_names[opcode]);
}
#endif /* PARSER_DUMP_BYTE_CODE */
#if PARSER_MAXIMUM_CODE_SIZE <= 65535
opcode++;
#else /* PARSER_MAXIMUM_CODE_SIZE > 65535 */
PARSER_PLUS_EQUAL_U16 (opcode, 2);
#endif /* PARSER_MAXIMUM_CODE_SIZE <= 65535 */
parser_emit_two_bytes (context_p, (uint8_t) opcode, 0);
branch_p->page_p = context_p->byte_code.last_p;
branch_p->offset = (context_p->byte_code.last_position - 1) | (context_p->byte_code_size << 8);
context_p->byte_code_size += extra_byte_code_increase;
#if PARSER_MAXIMUM_CODE_SIZE <= 65535
PARSER_APPEND_TO_BYTE_CODE (context_p, 0);
context_p->byte_code_size += 3;
#else /* PARSER_MAXIMUM_CODE_SIZE > 65535 */
parser_emit_two_bytes (context_p, 0, 0);
context_p->byte_code_size += 4;
#endif /* PARSER_MAXIMUM_CODE_SIZE <= 65535 */
if (context_p->stack_depth > context_p->stack_limit)
{
context_p->stack_limit = context_p->stack_depth;
if (context_p->stack_limit > PARSER_MAXIMUM_STACK_LIMIT)
{
parser_raise_error (context_p, PARSER_ERR_STACK_LIMIT_REACHED);
}
}
} /* parser_emit_cbc_forward_branch */
/**
* Append a branch byte code and create an item.
*
* @return newly created parser branch node
*/
parser_branch_node_t *
parser_emit_cbc_forward_branch_item (parser_context_t *context_p, /**< context */
uint16_t opcode, /**< opcode */
parser_branch_node_t *next_p) /**< next branch */
{
parser_branch_t branch;
parser_branch_node_t *new_item;
/* Since byte code insertion may throw an out-of-memory error,
* the branch is constructed locally, and copied later. */
parser_emit_cbc_forward_branch (context_p, opcode, &branch);
new_item = (parser_branch_node_t *) parser_malloc (context_p, sizeof (parser_branch_node_t));
new_item->branch = branch;
new_item->next_p = next_p;
return new_item;
} /* parser_emit_cbc_forward_branch_item */
/**
* Append a byte code with a branch argument
*/
void
parser_emit_cbc_backward_branch (parser_context_t *context_p, /**< context */
uint16_t opcode, /**< opcode */
uint32_t offset) /**< destination offset */
{
uint8_t flags;
#ifdef PARSER_DUMP_BYTE_CODE
const char *name;
#endif /* PARSER_DUMP_BYTE_CODE */
if (context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
parser_flush_cbc (context_p);
}
context_p->status_flags |= PARSER_NO_END_LABEL;
offset = context_p->byte_code_size - offset;
if (PARSER_IS_BASIC_OPCODE (opcode))
{
JERRY_ASSERT (opcode < CBC_END);
flags = cbc_flags[opcode];
#ifdef PARSER_DUMP_BYTE_CODE
name = cbc_names[opcode];
#endif /* PARSER_DUMP_BYTE_CODE */
}
else
{
PARSER_APPEND_TO_BYTE_CODE (context_p, CBC_EXT_OPCODE);
opcode = (uint16_t) PARSER_GET_EXT_OPCODE (opcode);
JERRY_ASSERT (opcode < CBC_EXT_END);
flags = cbc_ext_flags[opcode];
context_p->byte_code_size++;
#ifdef PARSER_DUMP_BYTE_CODE
name = cbc_ext_names[opcode];
#endif /* PARSER_DUMP_BYTE_CODE */
}
JERRY_ASSERT (flags & CBC_HAS_BRANCH_ARG);
JERRY_ASSERT (CBC_BRANCH_IS_BACKWARD (flags));
JERRY_ASSERT (CBC_BRANCH_OFFSET_LENGTH (opcode) == 1);
JERRY_ASSERT (offset <= context_p->byte_code_size);
/* Branch opcodes never push anything onto the stack. */
JERRY_ASSERT ((flags >> CBC_STACK_ADJUST_SHIFT) >= CBC_STACK_ADJUST_BASE
|| (CBC_STACK_ADJUST_BASE - (flags >> CBC_STACK_ADJUST_SHIFT)) <= context_p->stack_depth);
PARSER_PLUS_EQUAL_U16 (context_p->stack_depth, CBC_STACK_ADJUST_VALUE (flags));
#ifdef PARSER_DUMP_BYTE_CODE
if (context_p->is_show_opcodes)
{
JERRY_DEBUG_MSG (" [%3d] %s\n", (int) context_p->stack_depth, name);
}
#endif /* PARSER_DUMP_BYTE_CODE */
context_p->byte_code_size += 2;
#if PARSER_MAXIMUM_CODE_SIZE <= 65535
if (offset > 255)
{
opcode++;
context_p->byte_code_size++;
}
#else /* PARSER_MAXIMUM_CODE_SIZE > 65535 */
if (offset > 65535)
{
PARSER_PLUS_EQUAL_U16 (opcode, 2);
context_p->byte_code_size += 2;
}
else if (offset > 255)
{
opcode++;
context_p->byte_code_size++;
}
#endif /* PARSER_MAXIMUM_CODE_SIZE <= 65535 */
PARSER_APPEND_TO_BYTE_CODE (context_p, (uint8_t) opcode);
#if PARSER_MAXIMUM_CODE_SIZE > 65535
if (offset > 65535)
{
PARSER_APPEND_TO_BYTE_CODE (context_p, offset >> 16);
}
#endif /* PARSER_MAXIMUM_CODE_SIZE > 65535 */
if (offset > 255)
{
PARSER_APPEND_TO_BYTE_CODE (context_p, (offset >> 8) & 0xff);
}
PARSER_APPEND_TO_BYTE_CODE (context_p, offset & 0xff);
} /* parser_emit_cbc_backward_branch */
#undef PARSER_CHECK_LAST_POSITION
#undef PARSER_APPEND_TO_BYTE_CODE
/**
* Set a branch to the current byte code position
*/
void
parser_set_branch_to_current_position (parser_context_t *context_p, /**< context */
parser_branch_t *branch_p) /**< branch result */
{
uint32_t delta;
size_t offset;
parser_mem_page_t *page_p = branch_p->page_p;
if (context_p->last_cbc_opcode != PARSER_CBC_UNAVAILABLE)
{
parser_flush_cbc (context_p);
}
context_p->status_flags &= (uint32_t) ~PARSER_NO_END_LABEL;
JERRY_ASSERT (context_p->byte_code_size > (branch_p->offset >> 8));
delta = context_p->byte_code_size - (branch_p->offset >> 8);
offset = (branch_p->offset & CBC_LOWER_SEVEN_BIT_MASK);
JERRY_ASSERT (delta <= PARSER_MAXIMUM_CODE_SIZE);
#if PARSER_MAXIMUM_CODE_SIZE <= 65535
page_p->bytes[offset++] = (uint8_t) (delta >> 8);
if (offset >= PARSER_CBC_STREAM_PAGE_SIZE)
{
page_p = page_p->next_p;
offset = 0;
}
#else /* PARSER_MAXIMUM_CODE_SIZE > 65535 */
page_p->bytes[offset++] = (uint8_t) (delta >> 16);
if (offset >= PARSER_CBC_STREAM_PAGE_SIZE)
{
page_p = page_p->next_p;
offset = 0;
}
page_p->bytes[offset++] = (uint8_t) ((delta >> 8) & 0xff);
if (offset >= PARSER_CBC_STREAM_PAGE_SIZE)
{
page_p = page_p->next_p;
offset = 0;
}
#endif /* PARSER_MAXIMUM_CODE_SIZE <= 65535 */
page_p->bytes[offset++] = delta & 0xff;
} /* parser_set_branch_to_current_position */
/**
* Set breaks to the current byte code position
*/
void
parser_set_breaks_to_current_position (parser_context_t *context_p, /**< context */
parser_branch_node_t *current_p) /**< branch list */
{
while (current_p != NULL)
{
parser_branch_node_t *next_p = current_p->next_p;
if (!(current_p->branch.offset & CBC_HIGHEST_BIT_MASK))
{
parser_set_branch_to_current_position (context_p, &current_p->branch);
}
parser_free (current_p, sizeof (parser_branch_node_t));
current_p = next_p;
}
} /* parser_set_breaks_to_current_position */
/**
* Set continues to the current byte code position
*/
void
parser_set_continues_to_current_position (parser_context_t *context_p, /**< context */
parser_branch_node_t *current_p) /**< branch list */
{
while (current_p != NULL)
{
if (current_p->branch.offset & CBC_HIGHEST_BIT_MASK)
{
parser_set_branch_to_current_position (context_p, &current_p->branch);
}
current_p = current_p->next_p;
}
} /* parser_set_continues_to_current_position */
#ifdef JERRY_ENABLE_ERROR_MESSAGES
/**
* Returns with the string representation of the error
*/
const char *
parser_error_to_string (parser_error_t error) /**< error code */
{
switch (error)
{
case PARSER_ERR_OUT_OF_MEMORY:
{
return "Out of memory.";
}
case PARSER_ERR_LITERAL_LIMIT_REACHED:
{
return "Maximum number of literals reached.";
}
case PARSER_ERR_ARGUMENT_LIMIT_REACHED:
{
return "Maximum number of function arguments reached.";
}
case PARSER_ERR_STACK_LIMIT_REACHED:
{
return "Maximum function stack size reached.";
}
case PARSER_ERR_REGISTER_LIMIT_REACHED:
{
return "Maximum number of registers is reached.";
}
case PARSER_ERR_INVALID_CHARACTER:
{
return "Invalid (unexpected) character.";
}
case PARSER_ERR_INVALID_HEX_DIGIT:
{
return "Invalid hexadecimal digit.";
}
case PARSER_ERR_INVALID_ESCAPE_SEQUENCE:
{
return "Invalid escape sequence.";
}
case PARSER_ERR_INVALID_UNICODE_ESCAPE_SEQUENCE:
{
return "Invalid unicode escape sequence.";
}
case PARSER_ERR_INVALID_IDENTIFIER_START:
{
return "Character cannot be start of an identifier.";
}
case PARSER_ERR_INVALID_IDENTIFIER_PART:
{
return "Character cannot be part of an identifier.";
}
case PARSER_ERR_INVALID_NUMBER:
{
return "Invalid number.";
}
case PARSER_ERR_MISSING_EXPONENT:
{
return "Missing exponent part.";
}
case PARSER_ERR_IDENTIFIER_AFTER_NUMBER:
{
return "Identifier cannot start after a number.";
}
case PARSER_ERR_INVALID_REGEXP:
{
return "Invalid regular expression.";
}
case PARSER_ERR_UNKNOWN_REGEXP_FLAG:
{
return "Unknown regexp flag.";
}
case PARSER_ERR_DUPLICATED_REGEXP_FLAG:
{
return "Duplicated regexp flag.";
}
case PARSER_ERR_UNSUPPORTED_REGEXP:
{
return "Regexp is not supported in the selected profile.";
}
case PARSER_ERR_IDENTIFIER_TOO_LONG:
{
return "Identifier is too long.";
}
case PARSER_ERR_STRING_TOO_LONG:
{
return "String is too long.";
}
case PARSER_ERR_NUMBER_TOO_LONG:
{
return "Number is too long.";
}
case PARSER_ERR_REGEXP_TOO_LONG:
{
return "Regexp is too long.";
}
case PARSER_ERR_UNTERMINATED_MULTILINE_COMMENT:
{
return "Unterminated multiline comment.";
}
case PARSER_ERR_UNTERMINATED_STRING:
{
return "Unterminated string literal.";
}
case PARSER_ERR_UNTERMINATED_REGEXP:
{
return "Unterminated regexp literal.";
}
case PARSER_ERR_NEWLINE_NOT_ALLOWED:
{
return "Newline is not allowed in strings or regexps.";
}
case PARSER_ERR_OCTAL_NUMBER_NOT_ALLOWED:
{
return "Octal numbers are not allowed in strict mode.";
}
case PARSER_ERR_OCTAL_ESCAPE_NOT_ALLOWED:
{
return "Octal escape sequences are not allowed in strict mode.";
}
case PARSER_ERR_STRICT_IDENT_NOT_ALLOWED:
{
return "Identifier name is reserved in strict mode.";
}
case PARSER_ERR_EVAL_NOT_ALLOWED:
{
return "Eval is not allowed to be used here in strict mode.";
}
case PARSER_ERR_ARGUMENTS_NOT_ALLOWED:
{
return "Arguments is not allowed to be used here in strict mode.";
}
case PARSER_ERR_DELETE_IDENT_NOT_ALLOWED:
{
return "Deleting identifier is not allowed in strict mode.";
}
case PARSER_ERR_EVAL_CANNOT_ASSIGNED:
{
return "Eval cannot be assigned to in strict mode.";
}
case PARSER_ERR_ARGUMENTS_CANNOT_ASSIGNED:
{
return "Arguments cannot be assigned to in strict mode.";
}
case PARSER_ERR_WITH_NOT_ALLOWED:
{
return "With statement not allowed in strict mode.";
}
case PARSER_ERR_MULTIPLE_DEFAULTS_NOT_ALLOWED:
{
return "Multiple default cases are not allowed.";
}
case PARSER_ERR_DEFAULT_NOT_IN_SWITCH:
{
return "Default statement must be in a switch block.";
}
case PARSER_ERR_CASE_NOT_IN_SWITCH:
{
return "Case statement must be in a switch block.";
}
#if ENABLED (JERRY_ES2015_CLASS)
case PARSER_ERR_MULTIPLE_CLASS_CONSTRUCTORS:
{
return "Multiple constructors are not allowed.";
}
case PARSER_ERR_CLASS_CONSTRUCTOR_AS_ACCESSOR:
{
return "Class constructor may not be an accessor.";
}
case PARSER_ERR_CLASS_STATIC_PROTOTYPE:
{
return "Classes may not have a static property called 'prototype'.";
}
case PARSER_ERR_UNEXPECTED_SUPER_REFERENCE:
{
return "Super is not allowed to be used here.";
}
#endif /* ENABLED (JERRY_ES2015_CLASS) */
case PARSER_ERR_LEFT_PAREN_EXPECTED:
{
return "Expected '(' token.";
}
case PARSER_ERR_LEFT_BRACE_EXPECTED:
{
return "Expected '{' token.";
}
case PARSER_ERR_RIGHT_PAREN_EXPECTED:
{
return "Expected ')' token.";
}
case PARSER_ERR_RIGHT_SQUARE_EXPECTED:
{
return "Expected ']' token.";
}
#if ENABLED (JERRY_ES2015_TEMPLATE_STRINGS)
case PARSER_ERR_RIGHT_BRACE_EXPECTED:
{
return "Expected '}' token.";
}
#endif /* ENABLED (JERRY_ES2015_TEMPLATE_STRINGS) */
case PARSER_ERR_COLON_EXPECTED:
{
return "Expected ':' token.";
}
case PARSER_ERR_COLON_FOR_CONDITIONAL_EXPECTED:
{
return "Expected ':' token for ?: conditional expression.";
}
case PARSER_ERR_SEMICOLON_EXPECTED:
{
return "Expected ';' token.";
}
case PARSER_ERR_IN_EXPECTED:
{
return "Expected 'in' token.";
}
case PARSER_ERR_WHILE_EXPECTED:
{
return "While expected for do-while loop.";
}
case PARSER_ERR_CATCH_FINALLY_EXPECTED:
{
return "Catch or finally block expected.";
}
case PARSER_ERR_ARRAY_ITEM_SEPARATOR_EXPECTED:
{
return "Expected ',' or ']' after an array item.";
}
case PARSER_ERR_OBJECT_ITEM_SEPARATOR_EXPECTED:
{
return "Expected ',' or '}' after a property definition.";
}
case PARSER_ERR_IDENTIFIER_EXPECTED:
{
return "Identifier expected.";
}
case PARSER_ERR_EXPRESSION_EXPECTED:
{
return "Expression expected.";
}
case PARSER_ERR_PRIMARY_EXP_EXPECTED:
{
return "Primary expression expected.";
}
case PARSER_ERR_STATEMENT_EXPECTED:
{
return "Statement expected.";
}
case PARSER_ERR_PROPERTY_IDENTIFIER_EXPECTED:
{
return "Property identifier expected.";
}
case PARSER_ERR_ARGUMENT_LIST_EXPECTED:
{
return "Expected argument list.";
}
case PARSER_ERR_NO_ARGUMENTS_EXPECTED:
{
return "Property getters must have no arguments.";
}
case PARSER_ERR_ONE_ARGUMENT_EXPECTED:
{
return "Property setters must have one argument.";
}
case PARSER_ERR_INVALID_EXPRESSION:
{
return "Invalid expression.";
}
case PARSER_ERR_INVALID_SWITCH:
{
return "Invalid switch body.";
}
case PARSER_ERR_INVALID_BREAK:
{
return "Break statement must be inside a loop or switch.";
}
case PARSER_ERR_INVALID_BREAK_LABEL:
{
return "Labeled statement targeted by a break not found.";
}
case PARSER_ERR_INVALID_CONTINUE:
{
return "Continue statement must be inside a loop.";
}
case PARSER_ERR_INVALID_CONTINUE_LABEL:
{
return "Labeled statement targeted by a continue not found.";
}
case PARSER_ERR_INVALID_RETURN:
{
return "Return statement must be inside a function body.";
}
case PARSER_ERR_INVALID_RIGHT_SQUARE:
{
return "Unexpected '}' token.";
}
case PARSER_ERR_DUPLICATED_LABEL:
{
return "Duplicated label.";
}
#if ((ENABLED (JERRY_ES2015_FUNCTION_PARAMETER_INITIALIZER)) \
|| (ENABLED (JERRY_ES2015_FUNCTION_REST_PARAMETER)))
case PARSER_ERR_DUPLICATED_ARGUMENT_NAMES:
{
return "Duplicated function argument names are not allowed here.";
}
#endif /* ((ENABLED (JERRY_ES2015_FUNCTION_PARAMETER_INITIALIZER))
|| (ENABLED (JERRY_ES2015_FUNCTION_REST_PARAMETER))) */
#if ENABLED (JERRY_ES2015_FUNCTION_PARAMETER_INITIALIZER)
case PARSER_ERR_FORMAL_PARAM_AFTER_REST_PARAMETER:
{
return "Rest parameter must be the last formal parameter.";
}
case PARSER_ERR_REST_PARAMETER_DEFAULT_INITIALIZER:
{
return "Rest parameter may not have a default initializer.";
}
#endif /* ENABLED (JERRY_ES2015_FUNCTION_PARAMETER_INITIALIZER) */
case PARSER_ERR_OBJECT_PROPERTY_REDEFINED:
{
return "Property of object literal redefined.";
}
case PARSER_ERR_NON_STRICT_ARG_DEFINITION:
{
return "Non-strict argument definition.";
}
#if ENABLED (JERRY_ES2015_MODULE_SYSTEM)
case PARSER_ERR_FILE_NOT_FOUND:
{
return "Requested module not found.";
}
case PARSER_ERR_FROM_EXPECTED:
{
return "Expected 'from' token.";
}
case PARSER_ERR_FROM_COMMA_EXPECTED:
{
return "Expected 'from' or ',' token.";
}
case PARSER_ERR_AS_EXPECTED:
{
return "Expected 'as' token.";
}
case PARSER_ERR_STRING_EXPECTED:
{
return "Expected a string literal.";
}
case PARSER_ERR_MODULE_UNEXPECTED:
{
return "Import and export statements must be in the global context.";
}
case PARSER_ERR_LEFT_BRACE_MULTIPLY_EXPECTED:
{
return "Expected '{' or '*' token.";
}
case PARSER_ERR_LEFT_BRACE_MULTIPLY_LITERAL_EXPECTED:
{
return "Expected '{' or '*' or literal token.";
}
case PARSER_ERR_RIGHT_BRACE_COMMA_EXPECTED:
{
return "Expected '}' or ',' token.";
}
case PARSER_ERR_DUPLICATED_EXPORT_IDENTIFIER:
{
return "Duplicate exported identifier.";
}
case PARSER_ERR_DUPLICATED_IMPORT_BINDING:
{
return "Duplicated imported binding name.";
}
#endif /* ENABLED (JERRY_ES2015_MODULE_SYSTEM) */
default:
{
JERRY_ASSERT (error == PARSER_ERR_NO_ERROR);
return "No error.";
}
}
} /* parser_error_to_string */
#endif /* JERRY_ENABLE_ERROR_MESSAGES */
/**
* @}
* @}
* @}
*/
#endif /* !JERRY_DISABLE_JS_PARSER */
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