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jerryscript/jerry-core/parser/js/js-parser-util.c
Csaba Repasi 841e21a970
Generate parser error messages (#4836) 
Support parser error messages generation in tools/gen-strings.py.

JerryScript-DCO-1.0-Signed-off-by: Csaba Repasi repasics@inf.u-szeged.hu
2021-11-26 10:26:46 +01:00

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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 "ecma-helpers.h"
#include "js-parser-internal.h"
#if JERRY_PARSER
#if JERRY_LINE_INFO
#include "jcontext.h"
#endif /* JERRY_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)
#if JERRY_PARSER_DUMP_BYTE_CODE
/**
* Print literal corresponding to the current index
*/
static void
parser_print_literal (parser_context_t *context_p, /**< context */
uint16_t literal_index) /**< index of literal */
{
parser_scope_stack_t *scope_stack_p = context_p->scope_stack_p;
parser_scope_stack_t *scope_stack_end_p = scope_stack_p + context_p->scope_stack_top;
bool in_scope_literal = false;
while (scope_stack_p < scope_stack_end_p)
{
scope_stack_end_p--;
if (scope_stack_end_p->map_from == PARSER_SCOPE_STACK_FUNC)
{
if (literal_index == scope_stack_end_p->map_to)
{
in_scope_literal = true;
break;
}
}
else if (literal_index == scanner_decode_map_to (scope_stack_end_p))
{
in_scope_literal = true;
break;
}
}
if (literal_index < PARSER_REGISTER_START)
{
JERRY_DEBUG_MSG (in_scope_literal ? " IDX:%d->" : " idx:%d->", literal_index);
lexer_literal_t *literal_p = PARSER_GET_LITERAL (literal_index);
util_print_literal (literal_p);
return;
}
if (!in_scope_literal)
{
JERRY_DEBUG_MSG (" reg:%d", (int) (literal_index - PARSER_REGISTER_START));
return;
}
JERRY_DEBUG_MSG (" REG:%d->", (int) (literal_index - PARSER_REGISTER_START));
lexer_literal_t *literal_p = PARSER_GET_LITERAL (scope_stack_end_p->map_from);
util_print_literal (literal_p);
} /* parser_print_literal */
#endif /* JERRY_PARSER_DUMP_BYTE_CODE */
/**
* 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++;
}
#if JERRY_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))
{
parser_print_literal (context_p, context_p->last_cbc.literal_index);
}
if (flags & CBC_HAS_LITERAL_ARG2)
{
parser_print_literal (context_p, context_p->last_cbc.value);
if (!(flags & CBC_HAS_LITERAL_ARG))
{
parser_print_literal (context_p, context_p->last_cbc.third_literal_index);
}
}
if (flags & CBC_HAS_BYTE_ARG)
{
if (last_opcode == CBC_PUSH_NUMBER_POS_BYTE || last_opcode == CBC_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 == CBC_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 /* JERRY_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_keyword_type = LEXER_EOS;
} /* parser_emit_cbc_literal */
/**
* Append a byte code with a literal and value argument
*/
void
parser_emit_cbc_literal_value (parser_context_t *context_p, /**< context */
uint16_t opcode, /**< opcode */
uint16_t literal_index, /**< literal index */
uint16_t value) /**< value */
{
JERRY_ASSERT (PARSER_ARGS_EQ (opcode, CBC_HAS_LITERAL_ARG | CBC_HAS_LITERAL_ARG2));
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_keyword_type = LEXER_EOS;
context_p->last_cbc.value = value;
} /* parser_emit_cbc_literal_value */
/**
* 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_keyword_type = context_p->token.keyword_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 = PARSER_INVALID_LITERAL_INDEX;
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 == PARSER_INVALID_LITERAL_INDEX)
{
context_p->last_cbc_opcode = CBC_PUSH_NUMBER_0;
return;
}
context_p->last_cbc_opcode = CBC_PUSH_LITERAL_PUSH_NUMBER_0;
context_p->last_cbc.literal_index = lit_value;
return;
}
uint16_t opcode;
if (lit_value == PARSER_INVALID_LITERAL_INDEX)
{
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 = (is_negative_number ? CBC_PUSH_LITERAL_PUSH_NUMBER_NEG_BYTE : CBC_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 */
/**
* 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));
#if JERRY_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 /* JERRY_PARSER_DUMP_BYTE_CODE */
PARSER_PLUS_EQUAL_U16 (opcode, PARSER_MAX_BRANCH_LENGTH - 1);
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 <= UINT16_MAX
PARSER_APPEND_TO_BYTE_CODE (context_p, 0);
#else /* PARSER_MAXIMUM_CODE_SIZE > UINT16_MAX */
parser_emit_two_bytes (context_p, 0, 0);
#endif /* PARSER_MAXIMUM_CODE_SIZE <= UINT16_MAX */
context_p->byte_code_size += PARSER_MAX_BRANCH_LENGTH + 1;
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;
#if JERRY_PARSER_DUMP_BYTE_CODE
const char *name;
#endif /* JERRY_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];
#if JERRY_PARSER_DUMP_BYTE_CODE
name = cbc_names[opcode];
#endif /* JERRY_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++;
#if JERRY_PARSER_DUMP_BYTE_CODE
name = cbc_ext_names[opcode];
#endif /* JERRY_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));
#if JERRY_PARSER_DUMP_BYTE_CODE
if (context_p->is_show_opcodes)
{
JERRY_DEBUG_MSG (" [%3d] %s\n", (int) context_p->stack_depth, name);
}
#endif /* JERRY_PARSER_DUMP_BYTE_CODE */
context_p->byte_code_size += 2;
#if PARSER_MAXIMUM_CODE_SIZE > UINT16_MAX
if (offset > UINT16_MAX)
{
opcode++;
context_p->byte_code_size++;
}
#endif /* PARSER_MAXIMUM_CODE_SIZE > UINT16_MAX */
if (offset > UINT8_MAX)
{
opcode++;
context_p->byte_code_size++;
}
PARSER_APPEND_TO_BYTE_CODE (context_p, (uint8_t) opcode);
#if PARSER_MAXIMUM_CODE_SIZE > UINT16_MAX
if (offset > UINT16_MAX)
{
PARSER_APPEND_TO_BYTE_CODE (context_p, offset >> 16);
}
#endif /* PARSER_MAXIMUM_CODE_SIZE > UINT16_MAX */
if (offset > UINT8_MAX)
{
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
/**
* Helper function for parser.
*
* @return a new string based on encode.
*/
ecma_string_t *
parser_new_ecma_string_from_literal (lexer_literal_t *literal_p) /**< literal */
{
JERRY_ASSERT (literal_p != NULL);
ecma_string_t *new_string = NULL;
if (literal_p->status_flags & LEXER_FLAG_ASCII)
{
new_string = ecma_new_ecma_string_from_ascii (literal_p->u.char_p, literal_p->prop.length);
}
else
{
new_string = ecma_new_ecma_string_from_utf8 (literal_p->u.char_p, literal_p->prop.length);
}
return new_string;
} /* parser_new_ecma_string_from_literal */
/**
* 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 <= UINT16_MAX
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 > UINT16_MAX */
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 <= UINT16_MAX */
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 */
#if JERRY_ESNEXT
/**
* Return the size of internal record corresponding to a class field
*
* @return internal record size
*/
static size_t
parser_get_class_field_info_size (uint8_t class_field_type) /**< class field type */
{
if (class_field_type & PARSER_CLASS_FIELD_INITIALIZED)
{
return sizeof (scanner_range_t) + 1;
}
if (class_field_type & PARSER_CLASS_FIELD_NORMAL)
{
return sizeof (scanner_location_t) + 1;
}
return 1;
} /* parser_get_class_field_info_size */
/**
* Reverse the field list of a class
*/
void
parser_reverse_class_fields (parser_context_t *context_p, /**< context */
size_t fields_size) /**< size of consumed memory */
{
uint8_t *data_p = (uint8_t *) parser_malloc (context_p, fields_size);
uint8_t *data_end_p = data_p + fields_size;
uint8_t *current_p = data_p;
bool has_fields = false;
parser_stack_iterator_t iterator;
JERRY_ASSERT (!(context_p->stack_top_uint8 & PARSER_CLASS_FIELD_END));
parser_stack_iterator_init (context_p, &iterator);
do
{
uint8_t class_field_type = parser_stack_iterator_read_uint8 (&iterator);
size_t info_size = parser_get_class_field_info_size (class_field_type);
parser_stack_iterator_read (&iterator, current_p, info_size);
parser_stack_iterator_skip (&iterator, info_size);
current_p += info_size;
if (!(class_field_type & PARSER_CLASS_FIELD_STATIC))
{
has_fields = true;
context_p->stack_top_uint8 = class_field_type;
}
} while (current_p < data_end_p);
parser_stack_iterator_init (context_p, &iterator);
current_p = data_end_p;
bool has_static_fields = false;
if (has_fields)
{
do
{
uint8_t class_field_type = current_p[-1];
size_t info_size = parser_get_class_field_info_size (class_field_type);
if (!(class_field_type & PARSER_CLASS_FIELD_STATIC))
{
current_p -= info_size;
parser_stack_iterator_write (&iterator, current_p, info_size);
parser_stack_iterator_skip (&iterator, info_size);
continue;
}
if (!has_static_fields)
{
has_static_fields = true;
current_p[-1] |= PARSER_CLASS_FIELD_END;
}
current_p -= info_size;
} while (current_p > data_p);
}
else
{
/* All class fields are static. */
has_static_fields = true;
JERRY_ASSERT (data_end_p[-1] & PARSER_CLASS_FIELD_STATIC);
context_p->stack_top_uint8 = data_end_p[-1];
}
if (has_static_fields)
{
current_p = data_end_p;
do
{
uint8_t class_field_type = current_p[-1];
size_t info_size = parser_get_class_field_info_size (class_field_type);
current_p -= info_size;
if (class_field_type & PARSER_CLASS_FIELD_STATIC)
{
parser_stack_iterator_write (&iterator, current_p, info_size);
parser_stack_iterator_skip (&iterator, info_size);
}
} while (current_p > data_p);
}
parser_free (data_p, fields_size);
} /* parser_reverse_class_fields */
#endif /* JERRY_ESNEXT */
/**
* @}
* @}
* @}
*/
#endif /* JERRY_PARSER */
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