Function makeDynamicStrings

src/common/DynamicStrings.cpp:40–114

namespace Firebird {

unsigned makeDynamicStrings(unsigned length, ISC_STATUS* const dst, const ISC_STATUS* const src)
{
	const ISC_STATUS* end = &src[length];

	// allocate space for strings
	size_t len = 0;
	for (const ISC_STATUS* from = src; from < end; ++from)
	{
		const ISC_STATUS type = *from++;
		if (from == end || type == isc_arg_end)
		{
			end = from - 1;
			break;
		}

		switch (type)
		{
		case isc_arg_cstring:
			if (from + 1 >= end)
			{
				end = from - 1;
				break;
			}
			len += *from++;
			len++;
			break;

		case isc_arg_string:
		case isc_arg_interpreted:
		case isc_arg_sql_state:
			len += strlen(reinterpret_cast<const char*>(*from));
			len++;
			break;
		}
	}

	char* string = len ? FB_NEW_POOL(*getDefaultMemoryPool()) char[len] : NULL;
	ISC_STATUS* to = dst;

	// copy status vector saving strings in local buffer
	for (const ISC_STATUS* from = src; from < end; ++from)
	{
		const ISC_STATUS type = *from++;
		*to++ = type == isc_arg_cstring ? isc_arg_string : type;

		switch (type)
		{
		case isc_arg_cstring:
			fb_assert(string);
			*to++ = (ISC_STATUS)(IPTR) string;
			memcpy(string, reinterpret_cast<const char*>(from[1]), from[0]);
			string += *from++;
			*string++ = '\0';
			break;

		case isc_arg_string:
		case isc_arg_interpreted:
		case isc_arg_sql_state: