winamp/Src/Wasabi/bfc/string/string.cpp

#include <bfc/wasabi_std.h>
#include "string.h"
#include <bfc/nsguid.h>

String::String(const char *initial_val)
		: val(NULL)
{
	setValue(initial_val);
}

String::String(const String &s)
		: val(NULL)
{
	if (s == NULL) setValue(NULL);
	else setValue(s.getValue());
}

String::String(const String *s)
		: val(NULL)
{
	if (s == NULL) setValue(NULL);
	else setValue(s->getValue());
}

String::~String()
{
	FREE(val);
}

const char *String::getValueSafe(const char *def_val) const
{
	if (val == NULL)
		return def_val;
	else
		return val;
}

int String::getChar(int pos, int bounds_check)
{
	if (pos < 0 || val == NULL) return -1;
	if (bounds_check && pos >= len()) return -1;
	return val[pos];
}

int String::setChar(int pos, int value)
{
	if (pos < 0 || val == NULL) return -1;
	return val[pos] = value;
}

const char *String::setValue(const char *newval)
{
	if (newval != val)
	{
		if (newval == NULL)
		{
			FREE(val);
			val = NULL;
		}
		else
		{
			int len = STRLEN(newval);
			if (val != NULL)
#ifdef STRING_REALLOC_OPTIMS
			{
				int oldlen = STRLEN(val);
				// if smaller but greater than half previous size, don't realloc
				if (len > oldlen || len < oldlen / 2)
					val = (char *)REALLOC(val, len + 1);
			}
#else
				val = (char *)REALLOC(val, len + 1);
#endif
			else
				val = (char *)MALLOC(len + 1);
			ASSERT(newval != NULL);
			MEMCPY_(val, newval, len + 1);
		}
	}
	return getValue();
}

int String::len() const
{
	return (val == NULL) ? 0 : STRLEN(val);
}

int String::isempty() const
{
	return (!val || !*val);
}

void String::toupper()
{
	if (!isempty())
		STRTOUPPER(val);
}

void String::tolower()
{
	if (!isempty())
		STRTOLOWER(val);
}

int String::isequal(const char *otherval) const
{
	return !STRCMPSAFE(getValue(), otherval);
}

int String::iscaseequal(const char *otherval) const
{
	return !STRICMPSAFE(getValue(), otherval);
}

int String::islessthan(const char *otherval) const
{
	return STRCMPSAFE(getValue(), otherval) < 0;
}

void String::changeChar(int from, int to)
{
	if (val == NULL) return ;
	int length = len();
	for (int i = 0; i < length; i++)
		if (val[i] == from) val[i] = to;
}

void String::truncateOnChar(int which, int fromright)
{
	if (fromright)
	{
		if (val == NULL) return ;
		int length = len();
		for (int i = length - 1; i >= 0; i--)
		{
			if (val[i] == which)
			{
				val[i] = '\0';
				return ;
			}
		}
	}
	else
	{
		changeChar(which, '\0');
	}
}

int String::lastChar()
{
	if (isempty()) return -1;
	return val[len() - 1];
}

const char *String::printf(const char *format, ...)
{
	va_list args;
	va_start (args, format);
	va_sprintf(format, args);
	va_end(args);
	return getValue();
}

const char *String::cat(const char *value)
{
	if (value == NULL || *value == 0) return getValue();
	if (val == NULL) return setValue(value);
	return catn(value, STRLEN(value));
}

const char *String::catn(const char *value, int len)
{
	if (len == 0) return val;
	if (value == NULL || *value == 0) return getValue();
	if (val == NULL) return ncpy(value, len);
	int ol = STRLEN(val);
	val = (char *)REALLOC(val, ol + len + 1);
	val[ol + len] = 0;
	STRNCPY(val + ol, value, len);
	return val;
}

const char *String::prepend(const char *value)
{
	if (value == NULL || *value == 0) return getValue();
	if (val == NULL) return setValue(value);
	StringPrintf temp("%s%s", value, getValue());
	swap(&temp);
	return getValue();
}

// replaces string with n chars of val or length of val, whichever is less.
const char *String::ncpy(const char *newstr, int numchars)
{
	val = (char *)REALLOC(val, numchars + 1);
	val[numchars] = 0;
	STRNCPY(val, newstr, numchars);
	return getValue();
}

void String::strncpyTo(char *dest, int maxlen)
{
	ASSERT(dest != NULL);
	ASSERT(maxlen >= 0);
	if (maxlen == 0) return ;
	else if (maxlen == 1)
	{
		*dest = '\0';
		return ;
	}
	const char *src = val;
	if (src == NULL) src = "";
	int copylen = MIN(STRLEN(src), maxlen);
	if (maxlen == copylen) copylen--;	// make room for 0-termination
	MEMCPY(dest, src, copylen);
	dest[copylen] = 0;
}

// -----------------------------------------
// Character based find-n-splice methods --
// "l" and "r" prefixes specify to begin at
// front or back of string:

#ifdef FAST_METHODS
#undef FAST_METHODS
#endif//FAST_METHODS
#ifdef SAFE_METHODS
#undef SAFE_METHODS
#endif//SAFE_METHODS
#ifdef USE
#undef USE
#endif//USE

#define FAST_METHODS 1
#define SAFE_METHODS 0

#define USE FAST_METHODS

// Returns index of first found, -1 if not found.
int String::lFindChar(char findval)
{
	int length = len();
	for (int i = 0; i < length; i++)
	{
		if (val[i] == findval)
		{
			return i;
		}
	}
	return -1;
}

// Same as above, save the "findval" is a string where it searches
// for any of the characters in the string.
int String::lFindChar(const char *findval)
{
	int length = len();
	int numchars = STRLEN(findval);
	for (int i = 0; i < length; i++)
	{
		for (int j = 0; j < numchars; j++)
		{
			if (val[i] == findval[j])
			{
				return i;
			}
		}
	}
	return -1;
}

int String::rFindChar(char findval)
{
	int length = len();
	for (int i = length - 1; i > 0; i--)
	{
		if (val[i] == findval)
		{
			return i;
		}
	}
	return -1;
}

// Same as above, save the "findval" is a string where it searches
// for any of the characters in the string.
int String::rFindChar(const char *findval)
{
	int length = len();
	int numchars = STRLEN(findval);
	for (int i = length - 1; i > 0; i--)
	{
		for (int j = 0; j < numchars; j++)
		{
			if (val[i] == findval[j])
			{
				return i;
			}
		}
	}
	return -1;
}

// Splits string at findval.  Characters passed by search, including the
// found character, are MOVED to the returned string.  If there is no char
// to be found, the entire string is returnef and the called instance is
// left empty.  (Makes looped splits very easy).
String String::lSplit(int idxval)
{
	if (val == NULL) return String();
	if (idxval == -1)
	{ // Not Found
		// Copy our contents to return on the stack
		String retval(val);
		// And zero the string.
		if (val)
		{
			val[0] = 0;
		}
		return retval;
	}
	else
	{
		String retval;
		// Copy into retval the number of characters to the found char index.
		retval.ncpy(val, idxval + 1);
		{
			String testscope;
			// Copy into retval the number of characters to the found char index.
			testscope.ncpy(val, idxval + 1);
		}
#if USE == FAST_METHODS
		size_t len = strlen(val + idxval + 1);
		MEMCPY(val, val + idxval + 1, len + 1);
#elif USE == SAFE_METHODS
		// Copy from the found index downwards to save for this object
		String temp(val + idxval + 1);
		// And then copy into ourselves the tempspace.
		*this = temp;
#endif
		return retval;
	}
	// this will never be hit.  many compilers are too stupid to realize this.
	return String();
}

String String::lSplitChar(char findval)
{
	if (val == NULL) return String();
	// The index of the found character
	int idxval = lFindChar(findval);
	return lSplit(idxval);
}

String String::lSplitChar(const char *findval)
{
	if (val == NULL) return String();
	// The index of the found character
	int idxval = lFindChar(findval);
	return lSplit(idxval);
}

String String::rSplit(int idxval)
{
	if (val == NULL) return String();
	if (idxval == -1)
	{	// Not Found
		// Copy our contents to return on the stack
		String retval(val);
		// And zero the string.
		val[0] = 0;
		return retval;
	}
	else
	{
		// Copy from the found index downwards to the retval
		String retval(val + idxval);
		// Terminate the found char index
		val[idxval] = 0;
		// That was easier, wasn't it?
		return retval;
	}
	// this will never be hit.  many compilers are too stupid to realize this.
	return String();
}

String String::rSplitChar(char findval)
{
	if (val == NULL) return String();
	// The index of the found character
	int idxval = rFindChar(findval);
	return rSplit(idxval);
}

String String::rSplitChar(const char *findval)
{
	if (val == NULL) return String();
	// The index of the found character
	int idxval = rFindChar(findval);
	return rSplit(idxval);
}

// Same as split, except the find char is cut completely.
String String::lSpliceChar(char findval)
{
	if (val == NULL) return String();
	//CUT  // Auto-scope reference allows us to avoid a copy.
	//CUT  String & retval = lSplitChar(findval);
	//BU gcc doesn't agree with you and neither do I :/
	String retval = lSplitChar(findval);

	// We need to strip the findval char, which is the end char.
	int end = retval.len();
	if (end)
	{
		if (retval.val[end - 1] == findval)
		{
			retval.val[end - 1] = 0;
		}
	}
	return retval;
}

// Same as split, except the find char is cut completely.
String String::lSpliceChar(const char *findval)
{
	if (val == NULL) return String();
	//CUT  // Auto-scope reference allows us to avoid a copy.
	//CUT  String & retval = lSplitChar(findval);
	//BU gcc doesn't agree with you and neither do I :/
	String retval = lSplitChar(findval);
	// We need to strip the findval char, which is the end char.
	int end = retval.len();
	int num = STRLEN(findval);
	if (end)
	{
		for (int i = 0; i < num; i++)
		{
			if (retval.val[end - 1] == findval[i])
			{
				retval.val[end - 1] = 0;
			}
		}
	}
	return retval;
}

String String::rSpliceChar(char findval)
{
	if (val == NULL) return String();
	//CUT  // Auto-scope reference allows us to avoid a copy.
	//CUT  String & retval = rSplitChar(findval);
	//BU gcc doesn't agree with you and neither do I :/
	String retval = rSplitChar(findval);
	// We need to strip the findval char, which is the first char.
	// (But we still check for empty string:)
	size_t end = retval.len();
	if (end)
	{
		if (retval.val[0] == findval)
		{
#if USE == FAST_METHODS
			size_t len = strlen(retval.val + 1);
			MEMCPY(retval.val, retval.val + 1, len + 1);
#elif USE == SAFE_METHODS
			String temp(retval.val + 1);
			retval = temp;
#endif
			return retval;
		}
	}
	return retval;
}

String String::rSpliceChar(const char *findval)
{
	if (val == NULL) return String();
	//CUT  // Auto-scope reference allows us to avoid a copy.
	//CUT  String & retval = rSplitChar(findval);
	//BU gcc doesn't agree with you and neither do I :/
	String retval = rSplitChar(findval);
	// We need to strip the findval char, which is the first char.
	// (But we still check for empty string:)
	size_t end = retval.len();
	size_t num = STRLEN(findval);
	if (end)
	{
		for (size_t i = 0; i < num; i++)
		{
			if (retval.val[0] == findval[i])
			{
#if USE == FAST_METHODS
				size_t len = strlen(retval.val + 1);
				MEMCPY(retval.val, retval.val + 1, len + 1);
#elif USE == SAFE_METHODS
				String temp(retval.val + 1);
				retval = temp;
#endif
				return retval;
			}
		}
	}
	return retval;
}

int String::replace(const char *find, const char *replace)
{
	if (len() == 0 || find == NULL || replace == NULL) return 0;

	int find_count = 0;

	char *p, *p2;
	int rep_len = STRLEN( replace );
	int find_len = STRLEN( find );
	int size_diff = rep_len - find_len;

	if ( size_diff == 0 )
	{
		p = val;
		while ( p = STRSTR( p, find ) )
		{
			STRNCPY( p, replace, rep_len );
			p += find_len;
			find_count++;
		}
	}
	else
	{
		char *new_buf, *in;

		p = val;
		while ( p = STRSTR( p, find ) )
		{
			find_count++;
			p += find_len;
		}

		new_buf = (char *)MALLOC( len() + find_count * size_diff + 1 );

		p = val;
		in = new_buf;
		while ( p2 = STRSTR( p, find ) )
		{
			STRNCPY( in, p, (int)(p2 - p) );
			in += p2 - p;
			STRNCPY( in, replace, rep_len );
			in += rep_len;
			p = p2 + find_len;
		}
		STRCPY( in, p );
		new_buf[ len() + find_count * size_diff ] = 0;

		// just swap buffers

		FREE(val);
		val = new_buf;
	}
	return find_count;
}

int String::replaceNumericField(int value, int fieldchar)
{
	if (val == NULL || *val == '\0') return 0;
	int nrep = 0;
	for (const char *p = val; *p; p++)
	{
		if (*p == fieldchar) nrep++;
		else if (nrep) break;
	}
	if (nrep == 0) return 0;	// no field found
	String rc;
	char fc[2] = { 0, 0 };
	fc[0] = fieldchar;
	for (int i = 0; i < nrep; i++) rc.cat(fc);
	StringPrintf fmt("%%0%0dd", nrep);
	StringPrintf replacement(fmt.getValue(), value);
	return replace(rc, replacement);
}

#undef USE
#undef SAFE_METHODS
#undef FAST_METHODS

int String::numCharacters()
{
	// count newsize characters over how many bytes?
	int count, bytes;
	for (bytes = 0, count = 0; val[bytes]; count++, bytes++)
	{
		// If we encounter a lead byte, skip over the trail bytes.
		switch (val[bytes] & 0xC0)
		{
		case 0x80:  // trail bytes
			// THIS SHOULD NEVER EVER EVER EVER HAPPEN!
			// but we'll fall through anyhow, just in case someone
			// sends us non-UTF8.
		case 0xC0:  // lead bytes
			do
			{
				bytes++;
				if (val[bytes] == 0)
				{
					// if people are giving us lame encodings, break here.
					break;
				}
			}
			while ((val[bytes + 1] & 0xC0) == 0x80);
			break;
		}
	}
	return count;
}

void String::trunc(int newlen)
{
	if (val == NULL) return ;
	int oldlen = numCharacters();
	if (newlen < 0) newlen = MAX(oldlen + newlen, 0);
	if (newlen >= oldlen) return ;

	// count newsize characters over how many bytes?
	int count, bytes;
	for (bytes = 0, count = 0; count < newlen; count++, bytes++)
	{
		// If we encounter a lead byte, skip over the trail bytes.
		switch (val[bytes] & 0xC0)
		{
		case 0x80:  // trail bytes
			// THIS SHOULD NEVER EVER EVER EVER HAPPEN!
			// but we'll fall through anyhow, just in case someone
			// sends us non-UTF8.
		case 0xC0:  // lead bytes
			do
			{
				bytes++;
			}
			while ((val[bytes + 1] & 0xC0) == 0x80);
			break;
		}
	}

	val[bytes] = 0;
}

void String::trim(const char *whitespace, int left, int right)
{
	if (val == NULL) return ;
	if (left)
	{	// trim left
		for (;;)
		{
			int restart = 0;
			const char *p;
			for (p = whitespace; *p; p++)
			{
				if (*p == val[0])
				{
					STRCPY(val, val + 1);
					restart = 1;
					break;
				}
			}
			if (!restart) break;
		}
	} //left
	if (right)
	{
		char *ptr = val;
		while (ptr && *ptr) ptr++;
		ptr--;
		if (ptr <= val) return ;
		for (; ptr > val; ptr--)
		{
			const char *p;
			for (p = whitespace; *p; p++)
			{
				if (*p == *ptr)
				{
					*ptr = '\0';
					break;
				}
			}
			if (!*p) break;
		}
	} //right
}

int String::va_sprintf(const char *format, va_list args)
{
	if (!format) return 0;

	va_list saveargs = args;
	// roughly evaluate size of dest string
	const char *p = format;
	int length = 0;
	while (p && *p)
	{
		if (*(p++) != '%') length++;
		else
		{
			void *arg = va_arg(args, void *);
			for (;;)
			{
				const char f = *p++;
				if (f == 'c') length++;
				else if (f == 'i') length += 16;
				else if (f == 'u') length += 16;
				else if (f == 'f') length += 64;
				else if (f == 'd' || f == 'f') length += 64;
				else if (f == 'x') length += 32; // Hex with LC Alphas: 0x0009a64c
				else if (f == 'X') length += 32; // Hex with UC Alphas: 0x0009A64C
				else if (f == 's')
				{ // ::vsrintf can properly handle null.
					if (arg == NULL)
					{
						length += STRLEN("(null)"); // Just to be explicit.
					}
					else
					{
						length += STRLEN((const char *)arg);
					}
				}
				else if (f == 'S')
				{ // ::vsrintf can properly handle null.
					if (arg == NULL)
					{
						length += (int)wcslen(L"(null)"); // Just to be explicit.
					}
					else
					{
						length += (int)wcslen((const wchar_t *)arg);
					}
				}
				else if (ISDIGIT(f)) continue;
				else if (f == '.') continue;
				else if (f == '%') length++;
				else ASSERTPR(0, "undefined format passed to stringprintf!");
				break;
			}
		}
	}
	if (val)
	{
		if (len() < length)
			val = (char *)REALLOC(val, length + 1);
	}
	else val = (char *)MALLOC(length + 1);

	// now write the string in val
	int real_len = ::vsprintf_s(val, length + 1, format, saveargs);
	ASSERTPR(real_len <= length, "String.printf overflow");
	return real_len;
}

void String::purge()
{
	FREE(val);
	val = NULL;
}

// swaps buffers with another string
void String::swap(String *swapper)
{
	char *tempChar = swapper->val;
	swapper->val = val;
	val = tempChar;
}

void String::swap(String &swapper) // swaps buffers with another string
{
	char *tempChar = swapper.val;
	swapper.val = val;
	val = tempChar;
}

// take ownership of a buffer
void String::own(char *swapper)
{
	if (val)
		FREE(val);
	val = swapper;
}

const char *String::catPostSeparator(const char *value, const char separator)
{
	if (value == NULL || *value == 0 || separator == 0) return getValue();
	int oldLen = val ? STRLEN(val) : 0;
	int newLen = STRLEN(value);
	val = (char *)REALLOC(val, oldLen + newLen + 1 + 1); // +1 for separator, +1 for null character
	STRCPY(val + oldLen, value);
	val[oldLen + newLen] = separator; // add the separator
	val[oldLen + newLen + 1] = 0; // null terminate
	return val;
}

const char *String::catPreSeparator(const char separator, const char *value)
{
	if (value == NULL || *value == 0 || separator == 0) return getValue();
	int oldLen = val ? STRLEN(val) : 0;
	int newLen = STRLEN(value);
	val = (char *)REALLOC(val, oldLen + newLen + 1 + 1); // +1 for separator, +1 for null character
	val[oldLen] = separator; // add the separator
	STRCPY(val + oldLen + 1, value); // +1 for separator (goes first)
	val[oldLen + newLen + 1] = 0; // null terminate
	return val;
}

void String::AppendPath(const char *path)
{
	catPreSeparator('/', path); 
}

StringPrintf::StringPrintf(const char *format, ...)
{
	va_list args;
	va_start (args, format);
	va_sprintf(format, args);
	va_end(args);
}

StringPrintf::StringPrintf(int value)
{
	*this += value;
}

StringPrintf::StringPrintf(double value)
{
	// TODO: review to use locale variant...
	char* locale = _strdup(setlocale(LC_NUMERIC, NULL));
	setlocale(LC_NUMERIC, "C");
	*this += StringPrintf("%f", value);
	if (locale)
	{
		setlocale(LC_NUMERIC, locale);
		free(locale);
	}
}

StringPrintf::StringPrintf(GUID g)
{
	char splab[nsGUID::GUID_STRLEN + 1] = {0};
	nsGUID::toChar(g, splab);
	cat(splab);
}

_DebugString::_DebugString(const char *format, ...)
{
	va_list args;
	va_start (args, format);
	va_sprintf(format, args);
	va_end(args);

	debugPrint();
}

_DebugString::_DebugString(const String &s) : String(s)
{
	debugPrint();
}

_DebugString::_DebugString(const String *s) : String(s)
{
	debugPrint();
}

void _DebugString::debugPrint()
{
#ifdef _WIN32
	OutputDebugStringA(getValue());
	if (lastChar() != '\n') OutputDebugStringA("\n");
#else
#warning port me
#endif
}

int StringComparator::compareItem(String *p1, String* p2)
{
	return STRCMP(p1->getValue(), p2->getValue());
}

int StringComparator::compareAttrib(const wchar_t *attrib, String *item)
{
	return STRCMP((const char *)attrib, item->getValue());
}