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Implement String.prototype.trim()

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JerryScript-DCO-1.0-Signed-off-by: Laszlo Vidacs lvidacs.u-szeged@partner.samsung.com
This commit is contained in:
Laszlo Vidacs
2015-06-15 15:37:27 +02:00
committed by Peter Gal
parent 913519dd5c
commit caa1617ea2
2 changed files with 130 additions and 1 deletions
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jerry-core/ecma/builtin-objects/ecma-builtin-string-prototype.cpp
+61 -1
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@@ -25,6 +25,7 @@
#include "ecma-string-object.h"
#include "ecma-try-catch-macro.h"
#include "jrt.h"
#include "jrt-libc-includes.h"
#ifndef CONFIG_ECMA_COMPACT_PROFILE_DISABLE_STRING_BUILTIN
@@ -554,7 +555,66 @@ ecma_builtin_string_prototype_object_to_locale_upper_case (ecma_value_t this_arg
static ecma_completion_value_t
ecma_builtin_string_prototype_object_trim (ecma_value_t this_arg) /**< this argument */
{
ECMA_BUILTIN_CP_UNIMPLEMENTED (this_arg);
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);
ecma_string_t *original_string_p = ecma_get_string_from_value (to_string_val);
JERRY_ASSERT (ecma_string_get_length (original_string_p) >= 0);
/* 3 */
const uint32_t len = (uint32_t) ecma_string_get_length (original_string_p);
/* Workaround: avoid repeated call of ecma_string_get_char_at_pos() because its overhead */
uint32_t zt_str_size = (uint32_t) sizeof (ecma_char_t) * (len + 1);
ecma_char_t *original_zt_str_p = (ecma_char_t*) mem_heap_alloc_block (zt_str_size,
MEM_HEAP_ALLOC_SHORT_TERM);
ecma_string_to_zt_string (original_string_p, original_zt_str_p, (ssize_t) zt_str_size);
uint32_t prefix = 0, postfix = 0;
uint32_t new_len = 0;
while (prefix < len && isspace (original_zt_str_p[prefix]))
{
prefix++;
}
while (postfix < len - prefix && isspace (original_zt_str_p[len - postfix - 1]))
{
postfix++;
}
new_len = prefix < len ? len - prefix - postfix : 0;
MEM_DEFINE_LOCAL_ARRAY (new_str_buffer, new_len + 1, ecma_char_t);
for (uint32_t idx = 0; idx < new_len; ++idx)
{
new_str_buffer[idx] = original_zt_str_p[idx + prefix];
}
new_str_buffer[new_len] = '\0';
ecma_string_t *new_str_p = ecma_new_ecma_string ((ecma_char_t *) new_str_buffer);
/* 4 */
ret_value = ecma_make_normal_completion_value (ecma_make_string_value (new_str_p));
MEM_FINALIZE_LOCAL_ARRAY (new_str_buffer);
mem_heap_free_block (original_zt_str_p);
ECMA_FINALIZE (to_string_val);
ECMA_FINALIZE (check_coercible_val);
return ret_value;
} /* ecma_builtin_string_prototype_object_trim */
/**