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Implement toLowerCase and toUpperCase built-in functions.

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Related issue: #323

JerryScript-DCO-1.0-Signed-off-by: Zoltan Herczeg zherczeg@inf.u-szeged.hu
This commit is contained in:
Zoltan Herczeg
2015-07-14 05:52:12 -07:00
parent bc0ca7be5d
commit 69655f4456
5 changed files with 307 additions and 5 deletions
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jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.cpp
+163 -4
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@@ -27,6 +27,7 @@
#include "ecma-try-catch-macro.h"
#include "jrt.h"
#include "jrt-libc-includes.h"
#include "lit-char-helpers.h"
#ifndef CONFIG_ECMA_COMPACT_PROFILE_DISABLE_STRING_BUILTIN
@@ -507,6 +508,164 @@ ecma_builtin_string_prototype_object_substring (ecma_value_t this_arg, /**< this
return ret_value;
} /* ecma_builtin_string_prototype_object_substring */
/**
* Helper function to convert a string to upper or lower case.
*
* @return completion value
* Returned value must be freed with ecma_free_completion_value.
*/
static ecma_completion_value_t
ecma_builtin_string_prototype_object_conversion_helper (ecma_value_t this_arg, /**< this argument */
bool lower_case) /**< convert to lower (true)
* or upper (false) case */
{
ecma_completion_value_t ret_value = ecma_make_empty_completion_value ();
/* 1. */
ECMA_TRY_CATCH (check_coercible_val,
ecma_op_check_object_coercible (this_arg),
ret_value);
/* 2. */
ECMA_TRY_CATCH (to_string_val,
ecma_op_to_string (this_arg),
ret_value);
/* 3. */
ecma_string_t *input_string_p = ecma_get_string_from_value (to_string_val);
lit_utf8_size_t input_size = ecma_string_get_size (input_string_p);
MEM_DEFINE_LOCAL_ARRAY (input_start_p,
input_size,
lit_utf8_byte_t);
ecma_string_to_utf8_string (input_string_p,
input_start_p,
(ssize_t) (input_size));
/*
* The URI encoding has two major phases: first we compute
* the length of the lower case string, then we encode it.
*/
lit_utf8_size_t output_length = 0;
lit_utf8_iterator_t input_iterator = lit_utf8_iterator_create (input_start_p, input_size);
while (!lit_utf8_iterator_is_eos (&input_iterator))
{
ecma_char_t character = lit_utf8_iterator_read_next (&input_iterator);
ecma_char_t character_buffer[LIT_MAXIMUM_OTHER_CASE_LENGTH];
lit_utf8_byte_t utf8_byte_buffer[LIT_UTF8_MAX_BYTES_IN_CODE_POINT];
lit_utf8_size_t character_length;
/*
* We need to keep surrogate pairs. Surrogates are never converted,
* regardless they form a valid pair or not.
*/
if (lit_is_code_unit_high_surrogate (character))
{
ecma_char_t next_character = lit_utf8_iterator_peek_next (&input_iterator);
if (lit_is_code_unit_low_surrogate (next_character))
{
lit_code_point_t surrogate_code_point = lit_convert_surrogate_pair_to_code_point (character, next_character);
output_length += lit_code_point_to_utf8 (surrogate_code_point, utf8_byte_buffer);
lit_utf8_iterator_incr (&input_iterator);
continue;
}
}
if (lower_case)
{
character_length = lit_char_to_lower_case (character,
character_buffer,
LIT_MAXIMUM_OTHER_CASE_LENGTH);
}
else
{
character_length = lit_char_to_upper_case (character,
character_buffer,
LIT_MAXIMUM_OTHER_CASE_LENGTH);
}
JERRY_ASSERT (character_length >= 1 && character_length <= LIT_MAXIMUM_OTHER_CASE_LENGTH);
for (lit_utf8_size_t i = 0; i < character_length; i++)
{
output_length += lit_code_unit_to_utf8 (character_buffer[i], utf8_byte_buffer);
}
}
/* Second phase. */
MEM_DEFINE_LOCAL_ARRAY (output_start_p,
output_length,
lit_utf8_byte_t);
lit_utf8_byte_t *output_char_p = output_start_p;
/* Encoding the output. */
lit_utf8_iterator_seek_bos (&input_iterator);
while (!lit_utf8_iterator_is_eos (&input_iterator))
{
ecma_char_t character = lit_utf8_iterator_read_next (&input_iterator);
ecma_char_t character_buffer[LIT_MAXIMUM_OTHER_CASE_LENGTH];
lit_utf8_size_t character_length;
/*
* We need to keep surrogate pairs. Surrogates are never converted,
* regardless they form a valid pair or not.
*/
if (lit_is_code_unit_high_surrogate (character))
{
ecma_char_t next_character = lit_utf8_iterator_peek_next (&input_iterator);
if (lit_is_code_unit_low_surrogate (next_character))
{
lit_code_point_t surrogate_code_point = lit_convert_surrogate_pair_to_code_point (character, next_character);
output_char_p += lit_code_point_to_utf8 (surrogate_code_point, output_char_p);
lit_utf8_iterator_incr (&input_iterator);
continue;
}
}
if (lower_case)
{
character_length = lit_char_to_lower_case (character,
character_buffer,
LIT_MAXIMUM_OTHER_CASE_LENGTH);
}
else
{
character_length = lit_char_to_upper_case (character,
character_buffer,
LIT_MAXIMUM_OTHER_CASE_LENGTH);
}
JERRY_ASSERT (character_length >= 1 && character_length <= LIT_MAXIMUM_OTHER_CASE_LENGTH);
for (lit_utf8_size_t i = 0; i < character_length; i++)
{
output_char_p += lit_code_point_to_utf8 (character_buffer[i], output_char_p);
}
}
JERRY_ASSERT (output_start_p + output_length == output_char_p);
ecma_string_t *output_string_p = ecma_new_ecma_string_from_utf8 (output_start_p, output_length);
ret_value = ecma_make_normal_completion_value (ecma_make_string_value (output_string_p));
MEM_FINALIZE_LOCAL_ARRAY (output_start_p);
MEM_FINALIZE_LOCAL_ARRAY (input_start_p);
ECMA_FINALIZE (to_string_val);
ECMA_FINALIZE (check_coercible_val);
return ret_value;
} /* ecma_builtin_string_prototype_object_conversion_helper */
/**
* The String.prototype object's 'toLowerCase' routine
*
@@ -519,7 +678,7 @@ ecma_builtin_string_prototype_object_substring (ecma_value_t this_arg, /**< this
static ecma_completion_value_t
ecma_builtin_string_prototype_object_to_lower_case (ecma_value_t this_arg) /**< this argument */
{
ECMA_BUILTIN_CP_UNIMPLEMENTED (this_arg);
return ecma_builtin_string_prototype_object_conversion_helper (this_arg, true);
} /* ecma_builtin_string_prototype_object_to_lower_case */
/**
@@ -534,7 +693,7 @@ ecma_builtin_string_prototype_object_to_lower_case (ecma_value_t this_arg) /**<
static ecma_completion_value_t
ecma_builtin_string_prototype_object_to_locale_lower_case (ecma_value_t this_arg) /**< this argument */
{
ECMA_BUILTIN_CP_UNIMPLEMENTED (this_arg);
return ecma_builtin_string_prototype_object_conversion_helper (this_arg, true);
} /* ecma_builtin_string_prototype_object_to_locale_lower_case */
/**
@@ -549,7 +708,7 @@ ecma_builtin_string_prototype_object_to_locale_lower_case (ecma_value_t this_arg
static ecma_completion_value_t
ecma_builtin_string_prototype_object_to_upper_case (ecma_value_t this_arg) /**< this argument */
{
ECMA_BUILTIN_CP_UNIMPLEMENTED (this_arg);
return ecma_builtin_string_prototype_object_conversion_helper (this_arg, false);
} /* ecma_builtin_string_prototype_object_to_upper_case */
/**
@@ -564,7 +723,7 @@ ecma_builtin_string_prototype_object_to_upper_case (ecma_value_t this_arg) /**<
static ecma_completion_value_t
ecma_builtin_string_prototype_object_to_locale_upper_case (ecma_value_t this_arg) /**< this argument */
{
ECMA_BUILTIN_CP_UNIMPLEMENTED (this_arg);
return ecma_builtin_string_prototype_object_conversion_helper (this_arg, false);
} /* ecma_builtin_string_prototype_object_to_locale_upper_case */
/**