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qzdoom-gpl/src/zstring.cpp

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/*
** zstring.cpp
** A dynamically-allocated string class.
**
**---------------------------------------------------------------------------
** Copyright 2005-2008 Randy Heit
** All rights reserved.
**
** Redistribution and use in source and binary forms, with or without
** modification, are permitted provided that the following conditions
** are met:
**
** 1. Redistributions of source code must retain the above copyright
** notice, this list of conditions and the following disclaimer.
** 2. Redistributions in binary form must reproduce the above copyright
** notice, this list of conditions and the following disclaimer in the
** documentation and/or other materials provided with the distribution.
** 3. The name of the author may not be used to endorse or promote products
** derived from this software without specific prior written permission.
**
** THIS SOFTWARE IS PROVIDED BY THE AUTHOR ``AS IS'' AND ANY EXPRESS OR
** IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE IMPLIED WARRANTIES
** OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE ARE DISCLAIMED.
** IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY DIRECT, INDIRECT,
** INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT
** NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE,
** DATA, OR PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY
** THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT
** (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF
** THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
**---------------------------------------------------------------------------
**
*/
#include <stdlib.h>
#include <ctype.h>
#include <string.h>
#include <new> // for bad_alloc
#include "zstring.h"
FNullStringData FString::NullString =
{
0, // Length of string
2, // Size of character buffer
2, // RefCount; it must never be modified, so keep it above 1 user at all times
"\0"
};
void FString::AttachToOther (const FString &other)
{
assert (other.Chars != NULL);
if (other.Data()->RefCount < 0)
{
AllocBuffer (other.Data()->Len);
StrCopy (Chars, other.Chars, other.Data()->Len);
}
else
{
Chars = const_cast<FString &>(other).Data()->AddRef();
}
}
FString::FString (const char *copyStr)
{
if (copyStr == NULL || *copyStr == '\0')
{
NullString.RefCount++;
Chars = &NullString.Nothing[0];
}
else
{
size_t len = strlen (copyStr);
AllocBuffer (len);
StrCopy (Chars, copyStr, len);
}
}
FString::FString (const char *copyStr, size_t len)
{
AllocBuffer (len);
StrCopy (Chars, copyStr, len);
}
FString::FString (char oneChar)
{
if (oneChar == '\0')
{
NullString.RefCount++;
Chars = &NullString.Nothing[0];
}
else
{
AllocBuffer (1);
Chars[0] = oneChar;
Chars[1] = '\0';
}
}
FString::FString (const FString &head, const FString &tail)
{
size_t len1 = head.Len();
size_t len2 = tail.Len();
AllocBuffer (len1 + len2);
StrCopy (Chars, head);
StrCopy (Chars + len1, tail);
}
FString::FString (const FString &head, const char *tail)
{
size_t len1 = head.Len();
size_t len2 = strlen (tail);
AllocBuffer (len1 + len2);
StrCopy (Chars, head);
StrCopy (Chars + len1, tail, len2);
}
FString::FString (const FString &head, char tail)
{
size_t len1 = head.Len();
AllocBuffer (len1 + 1);
StrCopy (Chars, head);
Chars[len1] = tail;
Chars[len1+1] = '\0';
}
FString::FString (const char *head, const FString &tail)
{
size_t len1 = strlen (head);
size_t len2 = tail.Len();
AllocBuffer (len1 + len2);
StrCopy (Chars, head, len1);
StrCopy (Chars + len1, tail);
}
FString::FString (const char *head, const char *tail)
{
size_t len1 = strlen (head);
size_t len2 = strlen (tail);
AllocBuffer (len1 + len2);
StrCopy (Chars, head, len1);
StrCopy (Chars + len1, tail, len2);
}
FString::FString (char head, const FString &tail)
{
size_t len2 = tail.Len();
AllocBuffer (1 + len2);
Chars[0] = head;
StrCopy (Chars + 1, tail);
}
FString::~FString ()
{
Data()->Release();
}
char *FString::LockNewBuffer(size_t len)
{
Data()->Release();
AllocBuffer(len);
assert(Data()->RefCount == 1);
Data()->RefCount = -1;
return Chars;
}
char *FString::LockBuffer()
{
if (Data()->RefCount == 1)
{ // We're the only user, so we can lock it straight away
Data()->RefCount = -1;
}
else if (Data()->RefCount < -1)
{ // Already locked; just add to the lock count
Data()->RefCount--;
}
else
{ // Somebody else is also using this character buffer, so create a copy
FStringData *old = Data();
AllocBuffer (old->Len);
StrCopy (Chars, old->Chars(), old->Len);
old->Release();
Data()->RefCount = -1;
}
return Chars;
}
void FString::UnlockBuffer()
{
assert (Data()->RefCount < 0);
if (++Data()->RefCount == 0)
{
Data()->RefCount = 1;
}
}
FString &FString::operator = (const FString &other)
{
assert (Chars != NULL);
if (&other != this)
{
int oldrefcount = Data()->RefCount < 0;
Data()->Release();
AttachToOther(other);
if (oldrefcount < 0)
{
LockBuffer();
Data()->RefCount = oldrefcount;
}
}
return *this;
}
FString &FString::operator = (const char *copyStr)
{
if (copyStr != Chars)
{
if (copyStr == NULL || *copyStr == '\0')
{
Data()->Release();
NullString.RefCount++;
Chars = &NullString.Nothing[0];
}
else
{
// In case copyStr is inside us, we can't release it until
// we've finished the copy.
FStringData *old = Data();
if (copyStr < Chars || copyStr >= Chars + old->Len)
{
// We know the string isn't in our buffer, so release it now
// to reduce the potential for needless memory fragmentation.
old->Release();
old = NULL;
}
size_t len = strlen (copyStr);
AllocBuffer (len);
StrCopy (Chars, copyStr, len);
if (old != NULL)
{
old->Release();
}
}
}
return *this;
}
void FString::Format (const char *fmt, ...)
{
va_list arglist;
va_start (arglist, fmt);
VFormat (fmt, arglist);
va_end (arglist);
}
void FString::AppendFormat (const char *fmt, ...)
{
va_list arglist;
va_start (arglist, fmt);
StringFormat::VWorker (FormatHelper, this, fmt, arglist);
va_end (arglist);
}
void FString::VFormat (const char *fmt, va_list arglist)
{
Data()->Release();
Chars = (char *)(FStringData::Alloc(128) + 1);
StringFormat::VWorker (FormatHelper, this, fmt, arglist);
}
void FString::VAppendFormat (const char *fmt, va_list arglist)
{
StringFormat::VWorker (FormatHelper, this, fmt, arglist);
}
int FString::FormatHelper (void *data, const char *cstr, int len)
{
FString *str = (FString *)data;
size_t len1 = str->Len();
if (len1 + len > str->Data()->AllocLen || str->Chars == &NullString.Nothing[0])
{
str->ReallocBuffer((len1 + len + 127) & ~127);
}
StrCopy (str->Chars + len1, cstr, len);
str->Data()->Len = (unsigned int)(len1 + len);
return len;
}
FString FString::operator + (const FString &tail) const
{
return FString (*this, tail);
}
FString FString::operator + (const char *tail) const
{
return FString (*this, tail);
}
FString operator + (const char *head, const FString &tail)
{
return FString (head, tail);
}
FString FString::operator + (char tail) const
{
return FString (*this, tail);
}
FString operator + (char head, const FString &tail)
{
return FString (head, tail);
}
FString &FString::operator += (const FString &tail)
{
size_t len1 = Len();
size_t len2 = tail.Len();
ReallocBuffer (len1 + len2);
StrCopy (Chars + len1, tail);
return *this;
}
FString &FString::operator += (const char *tail)
{
size_t len1 = Len();
size_t len2 = strlen(tail);
ReallocBuffer (len1 + len2);
StrCopy (Chars + len1, tail, len2);
return *this;
}
FString &FString::operator += (char tail)
{
size_t len1 = Len();
ReallocBuffer (len1 + 1);
Chars[len1] = tail;
Chars[len1+1] = '\0';
return *this;
}
FString &FString::AppendCStrPart (const char *tail, size_t tailLen)
{
size_t len1 = Len();
ReallocBuffer (len1 + tailLen);
StrCopy (Chars + len1, tail, tailLen);
return *this;
}
FString &FString::CopyCStrPart(const char *tail, size_t tailLen)
{
ReallocBuffer(tailLen);
StrCopy(Chars, tail, tailLen);
return *this;
}
void FString::Truncate(long newlen)
{
if (newlen >= 0 && newlen < (long)Len())
{
ReallocBuffer (newlen);
Chars[newlen] = '\0';
}
}
FString FString::Left (size_t numChars) const
{
size_t len = Len();
if (len < numChars)
{
numChars = len;
}
return FString (Chars, numChars);
}
FString FString::Right (size_t numChars) const
{
size_t len = Len();
if (len < numChars)
{
numChars = len;
}
return FString (Chars + len - numChars, numChars);
}
FString FString::Mid (size_t pos, size_t numChars) const
{
size_t len = Len();
if (pos >= len)
{
return FString();
}
if (pos + numChars > len || pos + numChars < pos)
{
numChars = len - pos;
}
return FString (Chars + pos, numChars);
}
long FString::IndexOf (const FString &substr, long startIndex) const
{
return IndexOf (substr.Chars, startIndex);
}
long FString::IndexOf (const char *substr, long startIndex) const
{
if (startIndex > 0 && Len() <= (size_t)startIndex)
{
return -1;
}
char *str = strstr (Chars + startIndex, substr);
if (str == NULL)
{
return -1;
}
return long(str - Chars);
}
long FString::IndexOf (char subchar, long startIndex) const
{
if (startIndex > 0 && Len() <= (size_t)startIndex)
{
return -1;
}
char *str = strchr (Chars + startIndex, subchar);
if (str == NULL)
{
return -1;
}
return long(str - Chars);
}
long FString::IndexOfAny (const FString &charset, long startIndex) const
{
return IndexOfAny (charset.Chars, startIndex);
}
long FString::IndexOfAny (const char *charset, long startIndex) const
{
if (startIndex > 0 && Len() <= (size_t)startIndex)
{
return -1;
}
char *brk = strpbrk (Chars + startIndex, charset);
if (brk == NULL)
{
return -1;
}
return long(brk - Chars);
}
long FString::LastIndexOf (const FString &substr) const
{
return LastIndexOf (substr.Chars, long(Len()), substr.Len());
}
long FString::LastIndexOf (const char *substr) const
{
return LastIndexOf (substr, long(Len()), strlen(substr));
}
long FString::LastIndexOf (char subchar) const
{
return LastIndexOf (subchar, long(Len()));
}
long FString::LastIndexOf (const FString &substr, long endIndex) const
{
return LastIndexOf (substr.Chars, endIndex, substr.Len());
}
long FString::LastIndexOf (const char *substr, long endIndex) const
{
return LastIndexOf (substr, endIndex, strlen(substr));
}
long FString::LastIndexOf (char subchar, long endIndex) const
{
if ((size_t)endIndex > Len())
{
endIndex = long(Len());
}
while (--endIndex >= 0)
{
if (Chars[endIndex] == subchar)
{
return endIndex;
}
}
return -1;
}
long FString::LastIndexOf (const char *substr, long endIndex, size_t substrlen) const
{
if ((size_t)endIndex > Len())
{
endIndex = long(Len());
}
substrlen--;
while (--endIndex >= long(substrlen))
{
if (strncmp (substr, Chars + endIndex - substrlen, substrlen + 1) == 0)
{
return endIndex;
}
}
return -1;
}
long FString::LastIndexOfAny (const FString &charset) const
{
return LastIndexOfAny (charset.Chars, long(Len()));
}
long FString::LastIndexOfAny (const char *charset) const
{
return LastIndexOfAny (charset, long(Len()));
}
long FString::LastIndexOfAny (const FString &charset, long endIndex) const
{
return LastIndexOfAny (charset.Chars, endIndex);
}
long FString::LastIndexOfAny (const char *charset, long endIndex) const
{
if ((size_t)endIndex > Len())
{
endIndex = long(Len());
}
while (--endIndex >= 0)
{
if (strchr (charset, Chars[endIndex]) != NULL)
{
return endIndex;
}
}
return -1;
}
void FString::ToUpper ()
{
LockBuffer();
size_t max = Len();
for (size_t i = 0; i < max; ++i)
{
Chars[i] = (char)toupper(Chars[i]);
}
UnlockBuffer();
}
void FString::ToLower ()
{
LockBuffer();
size_t max = Len();
for (size_t i = 0; i < max; ++i)
{
Chars[i] = (char)tolower(Chars[i]);
}
UnlockBuffer();
}
void FString::SwapCase ()
{
LockBuffer();
size_t max = Len();
for (size_t i = 0; i < max; ++i)
{
if (isupper(Chars[i]))
{
Chars[i] = (char)tolower(Chars[i]);
}
else
{
Chars[i] = (char)toupper(Chars[i]);
}
}
UnlockBuffer();
}
void FString::StripLeft ()
{
size_t max = Len(), i, j;
if (max == 0) return;
for (i = 0; i < max; ++i)
{
if (!isspace(Chars[i]))
break;
}
if (Data()->RefCount <= 1)
{
for (j = 0; i <= max; ++j, ++i)
{
Chars[j] = Chars[i];
}
ReallocBuffer (j-1);
}
else
{
FStringData *old = Data();
AllocBuffer (max - i);
StrCopy (Chars, old->Chars() + i, max - i);
old->Release();
}
}
void FString::StripLeft (const FString &charset)
{
return StripLeft (charset.Chars);
}
void FString::StripLeft (const char *charset)
{
size_t max = Len(), i, j;
if (max == 0) return;
for (i = 0; i < max; ++i)
{
if (!strchr (charset, Chars[i]))
break;
}
if (Data()->RefCount <= 1)
{
for (j = 0; i <= max; ++j, ++i)
{
Chars[j] = Chars[i];
}
ReallocBuffer (j-1);
}
else
{
FStringData *old = Data();
AllocBuffer (max - i);
StrCopy (Chars, old->Chars() + i, max - i);
old->Release();
}
}
void FString::StripRight ()
{
size_t max = Len(), i;
for (i = max; i-- > 0; )
{
if (!isspace(Chars[i]))
break;
}
if (Data()->RefCount <= 1)
{
Chars[i+1] = '\0';
ReallocBuffer (i+1);
}
else
{
FStringData *old = Data();
AllocBuffer (i+1);
StrCopy (Chars, old->Chars(), i+1);
old->Release();
}
}
void FString::StripRight (const FString &charset)
{
return StripRight (charset.Chars);
}
void FString::StripRight (const char *charset)
{
size_t max = Len(), i;
if (max == 0) return;
for (i = max; i-- > 0; )
{
if (!strchr (charset, Chars[i]))
break;
}
if (Data()->RefCount <= 1)
{
Chars[i+1] = '\0';
ReallocBuffer (i+1);
}
else
{
FStringData *old = Data();
AllocBuffer (i+1);
StrCopy (Chars, old->Chars(), i+1);
old->Release();
}
}
void FString::StripLeftRight ()
{
size_t max = Len(), i, j, k;
if (max == 0) return;
for (i = 0; i < max; ++i)
{
if (!isspace(Chars[i]))
break;
}
for (j = max - 1; j >= i; --j)
{
if (!isspace(Chars[j]))
break;
}
if (Data()->RefCount <= 1)
{
for (k = 0; i <= j; ++i, ++k)
{
Chars[k] = Chars[i];
}
Chars[k] = '\0';
ReallocBuffer (k);
}
else
{
FStringData *old = Data();
AllocBuffer (j - i);
StrCopy (Chars, old->Chars(), j - i);
old->Release();
}
}
void FString::StripLeftRight (const FString &charset)
{
return StripLeftRight (charset.Chars);
}
void FString::StripLeftRight (const char *charset)
{
size_t max = Len(), i, j, k;
if (max == 0) return;
for (i = 0; i < max; ++i)
{
if (!strchr (charset, Chars[i]))
break;
}
for (j = max - 1; j >= i; --j)
{
if (!strchr (charset, Chars[j]))
break;
}
if (Data()->RefCount <= 1)
{
for (k = 0; i <= j; ++i, ++k)
{
Chars[k] = Chars[i];
}
Chars[k] = '\0';
ReallocBuffer (k);
}
else
{
FStringData *old = Data();
AllocBuffer (j - i);
StrCopy (Chars, old->Chars(), j - i);
old->Release();
}
}
void FString::Insert (size_t index, const FString &instr)
{
Insert (index, instr.Chars, instr.Len());
}
void FString::Insert (size_t index, const char *instr)
{
Insert (index, instr, strlen(instr));
}
void FString::Insert (size_t index, const char *instr, size_t instrlen)
{
size_t mylen = Len();
if (index > mylen)
{
index = mylen;
}
if (Data()->RefCount <= 1)
{
ReallocBuffer (mylen + instrlen);
memmove (Chars + index + instrlen, Chars + index, (mylen - index + 1)*sizeof(char));
memcpy (Chars + index, instr, instrlen*sizeof(char));
}
else
{
FStringData *old = Data();
AllocBuffer (mylen + instrlen);
StrCopy (Chars, old->Chars(), index);
StrCopy (Chars + index, instr, instrlen);
StrCopy (Chars + index + instrlen, old->Chars() + index, mylen - index);
old->Release();
}
}
void FString::ReplaceChars (char oldchar, char newchar)
{
size_t i, j;
LockBuffer();
for (i = 0, j = Len(); i < j; ++i)
{
if (Chars[i] == oldchar)
{
Chars[i] = newchar;
}
}
UnlockBuffer();
}
void FString::ReplaceChars (const char *oldcharset, char newchar)
{
size_t i, j;
LockBuffer();
for (i = 0, j = Len(); i < j; ++i)
{
if (strchr (oldcharset, Chars[i]) != NULL)
{
Chars[i] = newchar;
}
}
UnlockBuffer();
}
void FString::StripChars (char killchar)
{
size_t read, write, mylen;
LockBuffer();
for (read = write = 0, mylen = Len(); read < mylen; ++read)
{
if (Chars[read] != killchar)
{
Chars[write++] = Chars[read];
}
}
Chars[write] = '\0';
ReallocBuffer (write);
UnlockBuffer();
}
void FString::StripChars (const char *killchars)
{
size_t read, write, mylen;
LockBuffer();
for (read = write = 0, mylen = Len(); read < mylen; ++read)
{
if (strchr (killchars, Chars[read]) == NULL)
{
Chars[write++] = Chars[read];
}
}
Chars[write] = '\0';
ReallocBuffer (write);
UnlockBuffer();
}
void FString::MergeChars (char merger)
{
MergeChars (merger, merger);
}
void FString::MergeChars (char merger, char newchar)
{
size_t read, write, mylen;
LockBuffer();
for (read = write = 0, mylen = Len(); read < mylen; )
{
if (Chars[read] == merger)
{
while (Chars[++read] == merger)
{
}
Chars[write++] = newchar;
}
else
{
Chars[write++] = Chars[read++];
}
}
Chars[write] = '\0';
ReallocBuffer (write);
UnlockBuffer();
}
void FString::MergeChars (const char *charset, char newchar)
{
size_t read, write, mylen;
LockBuffer();
for (read = write = 0, mylen = Len(); read < mylen; )
{
if (strchr (charset, Chars[read]) != NULL)
{
while (strchr (charset, Chars[++read]) != NULL)
{
}
Chars[write++] = newchar;
}
else
{
Chars[write++] = Chars[read++];
}
}
Chars[write] = '\0';
ReallocBuffer (write);
UnlockBuffer();
}
void FString::Substitute (const FString &oldstr, const FString &newstr)
{
return Substitute (oldstr.Chars, newstr.Chars, oldstr.Len(), newstr.Len());
}
void FString::Substitute (const char *oldstr, const FString &newstr)
{
return Substitute (oldstr, newstr.Chars, strlen(oldstr), newstr.Len());
}
void FString::Substitute (const FString &oldstr, const char *newstr)
{
return Substitute (oldstr.Chars, newstr, oldstr.Len(), strlen(newstr));
}
void FString::Substitute (const char *oldstr, const char *newstr)
{
return Substitute (oldstr, newstr, strlen(oldstr), strlen(newstr));
}
void FString::Substitute (const char *oldstr, const char *newstr, size_t oldstrlen, size_t newstrlen)
{
LockBuffer();
for (size_t checkpt = 0; checkpt < Len(); )
{
char *match = strstr (Chars + checkpt, oldstr);
size_t len = Len();
if (match != NULL)
{
size_t matchpt = match - Chars;
if (oldstrlen != newstrlen)
{
ReallocBuffer (len + newstrlen - oldstrlen);
memmove (Chars + matchpt + newstrlen, Chars + matchpt + oldstrlen, (len + 1 - matchpt - oldstrlen)*sizeof(char));
}
memcpy (Chars + matchpt, newstr, newstrlen);
checkpt = matchpt + newstrlen;
}
else
{
break;
}
}
UnlockBuffer();
}
bool FString::IsInt () const
{
// String must match: [whitespace] [{+ | <20>}] [0 [{ x | X }]] [digits] [whitespace]
/* This state machine is based on a simplification of re2c's output for this input:
digits = [0-9];
hexdigits = [0-9a-fA-F];
octdigits = [0-7];
("0" octdigits+ | "0" [xX] hexdigits+ | (digits \ '0') digits*) { return true; }
[\000-\377] { return false; }*/
const char *YYCURSOR = Chars;
char yych;
yych = *YYCURSOR;
// Skip preceding whitespace
while (yych != '\0' && isspace(yych)) { yych = *++YYCURSOR; }
// Check for sign
if (yych == '+' || yych == '-') { yych = *++YYCURSOR; }
if (yych == '0')
{
yych = *++YYCURSOR;
if (yych >= '0' && yych <= '7')
{
do { yych = *++YYCURSOR; } while (yych >= '0' && yych <= '7');
}
else if (yych == 'X' || yych == 'x')
{
bool gothex = false;
yych = *++YYCURSOR;
while ((yych >= '0' && yych <= '9') || (yych >= 'A' && yych <= 'F') || (yych >= 'a' && yych <= 'f'))
{
gothex = true;
yych = *++YYCURSOR;
}
if (!gothex) return false;
}
else
{
return false;
}
}
else if (yych >= '1' && yych <= '9')
{
do { yych = *++YYCURSOR; } while (yych >= '0' && yych <= '9');
}
else
{
return false;
}
// The rest should all be whitespace
while (yych != '\0' && isspace(yych)) { yych = *++YYCURSOR; }
return yych == '\0';
}
bool FString::IsFloat () const
{
// String must match: [whitespace] [sign] [digits] [.digits] [ {d | D | e | E}[sign]digits] [whitespace]
/* This state machine is based on a simplification of re2c's output for this input:
digits = [0-9];
(digits+ | digits* "." digits+) ([dDeE] [+-]? digits+)? { return true; }
[\000-\377] { return false; }
*/
const char *YYCURSOR = Chars;
char yych;
bool gotdig = false;
yych = *YYCURSOR;
// Skip preceding whitespace
while (yych != '\0' && isspace(yych)) { yych = *++YYCURSOR; }
// Check for sign
if (yych == '+' || yych == '-') { yych = *++YYCURSOR; }
while (yych >= '0' && yych <= '9')
{
gotdig = true;
yych = *++YYCURSOR;
}
if (yych == '.')
{
yych = *++YYCURSOR;
if (yych >= '0' && yych <= '9')
{
gotdig = true;
do { yych = *++YYCURSOR; } while (yych >= '0' && yych <= '9');
}
else return false;
}
if (gotdig)
{
if (yych == 'D' || yych == 'd' || yych == 'E' || yych == 'e')
{
yych = *++YYCURSOR;
if (yych == '+' || yych == '-') yych = *++YYCURSOR;
while (yych >= '0' && yych <= '9') { yych = *++YYCURSOR; }
}
}
// The rest should all be whitespace
while (yych != '\0' && isspace(yych)) { yych = *++YYCURSOR; }
return yych == '\0';
}
long FString::ToLong (int base) const
{
return strtol (Chars, NULL, base);
}
unsigned long FString::ToULong (int base) const
{
return strtoul (Chars, NULL, base);
}
double FString::ToDouble () const
{
return strtod (Chars, NULL);
}
void FString::StrCopy (char *to, const char *from, size_t len)
{
memcpy (to, from, len*sizeof(char));
to[len] = 0;
}
void FString::StrCopy (char *to, const FString &from)
{
StrCopy (to, from.Chars, from.Len());
}
void FString::AllocBuffer (size_t len)
{
Chars = (char *)(FStringData::Alloc(len) + 1);
Data()->Len = (unsigned int)len;
}
void FString::ReallocBuffer (size_t newlen)
{
if (Data()->RefCount > 1)
{ // If more than one reference, we must use a new copy
FStringData *old = Data();
AllocBuffer (newlen);
StrCopy (Chars, old->Chars(), newlen < old->Len ? newlen : old->Len);
old->Release();
}
else
{
if (newlen > Data()->AllocLen)
{
Chars = (char *)(Data()->Realloc(newlen) + 1);
}
Data()->Len = (unsigned int)newlen;
}
}
// Under Windows, use the system heap functions for managing string memory.
// Under other OSs, use ordinary memory management instead.
#ifdef _WIN32
#define WIN32_LEAN_AND_MEAN
#include <windows.h>
static HANDLE StringHeap;
const SIZE_T STRING_HEAP_SIZE = 64*1024;
#endif
FStringData *FStringData::Alloc (size_t strlen)
{
strlen += 1 + sizeof(FStringData); // Add space for header and terminating null
strlen = (strlen + 7) & ~7; // Pad length up
#ifdef _WIN32
if (StringHeap == NULL)
{
StringHeap = HeapCreate (0, STRING_HEAP_SIZE, 0);
if (StringHeap == NULL)
{
throw std::bad_alloc();
}
}
FStringData *block = (FStringData *)HeapAlloc (StringHeap, 0, strlen);
#else
FStringData *block = (FStringData *)malloc (strlen);
#endif
if (block == NULL)
{
throw std::bad_alloc();
}
block->Len = 0;
block->AllocLen = (unsigned int)strlen - sizeof(FStringData) - 1;
block->RefCount = 1;
return block;
}
FStringData *FStringData::Realloc (size_t newstrlen)
{
assert (RefCount <= 1);
newstrlen += 1 + sizeof(FStringData); // Add space for header and terminating null
newstrlen = (newstrlen + 7) & ~7; // Pad length up
#ifdef _WIN32
FStringData *block = (FStringData *)HeapReAlloc (StringHeap, 0, this, newstrlen);
#else
FStringData *block = (FStringData *)realloc (this, newstrlen);
#endif
if (block == NULL)
{
throw std::bad_alloc();
}
block->AllocLen = (unsigned int)newstrlen - sizeof(FStringData) - 1;
return block;
}
void FStringData::Dealloc ()
{
assert (RefCount <= 0);
#ifdef _WIN32
HeapFree (StringHeap, 0, this);
#else
free (this);
#endif
}
FStringData *FStringData::MakeCopy ()
{
FStringData *copy = Alloc (Len);
copy->Len = Len;
FString::StrCopy (copy->Chars(), Chars(), Len);
return copy;
}
- separated the code generation from the DECORATE parser and cleaned up the interface to the code generator. Most importantly, the VMScriptFunctions are now preallocated when being added to the list of functions to compile and will be filled in later by the code generator. This allowed the removal of some ugly maintenance code.
2016-10-12 22:53:59 +00:00
FStringf::FStringf(const char *fmt, ...)
{
va_list ap;
va_start(ap, fmt);
VFormat(fmt, ap);
va_end(ap);
}
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