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Replace strchr with switch case

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This should improve performance and improve readability.
This commit is contained in:
Max Bruckner 2017-03-14 11:19:27 +01:00
parent 778a0c146f
commit c9739c59fd
1 changed files with 18 additions and 8 deletions
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16
cJSON.c
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@ -818,16 +818,26 @@ static cJSON_bool print_string_ptr(const unsigned char * const input, printbuffe
/* set "flag" to 1 if something needs to be escaped */
for (input_pointer = input; *input_pointer; input_pointer++)
{
if (strchr("\"\\\b\f\n\r\t", *input_pointer))
switch (*input_pointer)
{
case '\"':
case '\\':
case '\b':
case '\f':
case '\n':
case '\r':
case '\t':
/* one character escape sequence */
escape_characters++;
}
else if (*input_pointer < 32)
break;
default:
if (*input_pointer < 32)
{
/* UTF-16 escape sequence uXXXX */
escape_characters += 5;
}
break;
}
}
output_length = (size_t)(input_pointer - input) + escape_characters;