152 lines
3.5 KiB
C++
152 lines
3.5 KiB
C++
/* $Id$ */
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/*
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* This file is part of OpenTTD.
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* OpenTTD is free software; you can redistribute it and/or modify it under the terms of the GNU General Public License as published by the Free Software Foundation, version 2.
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* OpenTTD is distributed in the hope that it will be useful, but WITHOUT ANY WARRANTY; without even the implied warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.
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* See the GNU General Public License for more details. You should have received a copy of the GNU General Public License along with OpenTTD. If not, see <http://www.gnu.org/licenses/>.
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*/
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/** @file str.hpp String formating? */
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#ifndef STR_HPP
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#define STR_HPP
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#include <errno.h>
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#include <stdarg.h>
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#include "blob.hpp"
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#include "../core/math_func.hpp"
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#include "../string_func.h"
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/** Blob based case sensitive ANSI/UTF-8 string */
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struct CStrA : public CBlobT<char>
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{
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typedef CBlobT<char> base; ///< base class
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/** Create an empty CStrT */
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inline CStrA()
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{
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}
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/** Copy constructor */
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inline CStrA(const CStrA &src) : base(src)
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{
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base::FixTail();
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}
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/** Take over ownership constructor */
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inline CStrA(const OnTransfer& ot)
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: base(ot)
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{
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}
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/** Grow the actual buffer and fix the trailing zero at the end. */
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inline char *GrowSizeNC(uint count)
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{
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char *ret = base::GrowSizeNC(count);
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base::FixTail();
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return ret;
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}
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/** Append zero-ended C string. */
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inline void AppendStr(const char *str)
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{
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if (!StrEmpty(str)) {
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base::AppendRaw(str, strlen(str));
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base::FixTail();
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}
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}
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/** Append another CStrA. */
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inline void Append(const CStrA &src)
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{
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if (src.Length() > 0) {
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base::AppendRaw(src);
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base::FixTail();
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}
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}
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/** Assignment from C string. */
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inline CStrA &operator = (const char *src)
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{
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base::Clear();
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AppendStr(src);
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return *this;
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}
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/** Assignment from another CStrA. */
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inline CStrA &operator = (const CStrA &src)
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{
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if (&src != this) {
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base::Clear();
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base::AppendRaw(src.Data(), src.Size());
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base::FixTail();
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}
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return *this;
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}
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/** Lower-than operator (to support stl collections) */
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inline bool operator < (const CStrA &other) const
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{
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return strcmp(base::Data(), other.Data()) < 0;
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}
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/** Add formated string (like vsprintf) at the end of existing contents. */
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int AddFormatL(const char *format, va_list args)
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{
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size_t addSize = max<size_t>(strlen(format), 16);
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addSize += addSize / 2;
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int ret;
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int err = 0;
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for (;;) {
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char *buf = MakeFreeSpace(addSize);
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ret = vsnprintf(buf, base::GetReserve(), format, args);
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if (ret >= (int)base::GetReserve()) {
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/* Greater return than given count means needed buffer size. */
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addSize = ret + 1;
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continue;
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}
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if (ret >= 0) {
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/* success */
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break;
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}
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err = errno;
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if (err != ERANGE && err != ENOENT && err != 0) {
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/* some strange failure */
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break;
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}
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/* small buffer (M$ implementation) */
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addSize *= 2;
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}
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if (ret > 0) {
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GrowSizeNC(ret);
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} else {
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base::FixTail();
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}
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return ret;
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}
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/** Add formated string (like sprintf) at the end of existing contents. */
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int CDECL WARN_FORMAT(2, 3) AddFormat(const char *format, ...)
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{
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va_list args;
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va_start(args, format);
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int ret = AddFormatL(format, args);
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va_end(args);
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return ret;
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}
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/** Assign formated string (like sprintf). */
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int CDECL WARN_FORMAT(2, 3) Format(const char *format, ...)
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{
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base::Free();
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va_list args;
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va_start(args, format);
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int ret = AddFormatL(format, args);
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va_end(args);
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return ret;
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}
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};
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#endif /* STR_HPP */
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