Function parse_number

cJSON.c:307–408

Parse the input text to generate a number, and populate the result into item. */

/* Parse the input text to generate a number, and populate the result into item. */
static cJSON_bool parse_number(cJSON * const item, parse_buffer * const input_buffer)
{
    double number = 0;
    unsigned char *after_end = NULL;
    unsigned char *number_c_string;
    unsigned char decimal_point = get_decimal_point();
    size_t i = 0;
    size_t number_string_length = 0;
    cJSON_bool has_decimal_point = false;

    if ((input_buffer == NULL) || (input_buffer->content == NULL))
    {
        return false;
    }

    /* copy the number into a temporary buffer and replace '.' with the decimal point
     * of the current locale (for strtod)
     * This also takes care of '\0' not necessarily being available for marking the end of the input */
    for (i = 0; can_access_at_index(input_buffer, i); i++)
    {
        switch (buffer_at_offset(input_buffer)[i])
        {
            case '0':
            case '1':
            case '2':
            case '3':
            case '4':
            case '5':
            case '6':
            case '7':
            case '8':
            case '9':
            case '+':
            case '-':
            case 'e':
            case 'E':
                number_string_length++;
                break;

            case '.':
                number_string_length++;
                has_decimal_point = true;
                break;

            default:
                goto loop_end;
        }
    }
loop_end:
    /* malloc for temporary buffer, add 1 for '\0' */
    number_c_string = (unsigned char *) input_buffer->hooks.allocate(number_string_length + 1);
    if (number_c_string == NULL)
    {
        return false; /* allocation failure */
    }

    memcpy(number_c_string, buffer_at_offset(input_buffer), number_string_length);
    number_c_string[number_string_length] = '\0';