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| Source at commit 1322 created 12 years 8 months ago. By meklort, Add doxygen to utils folder | |
|---|---|
| 1 | /******************************************************************************␊ |
| 2 | *␊ |
| 3 | * $Id: bufstr.h,v 1.85 2000/11/18 12:58:19 root Exp $␊ |
| 4 | *␊ |
| 5 | *␊ |
| 6 | * Copyright (C) 1997-2011 by Dimitri van Heesch.␊ |
| 7 | *␊ |
| 8 | * Permission to use, copy, modify, and distribute this software and its␊ |
| 9 | * documentation under the terms of the GNU General Public License is hereby ␊ |
| 10 | * granted. No representations are made about the suitability of this software ␊ |
| 11 | * for any purpose. It is provided "as is" without express or implied warranty.␊ |
| 12 | * See the GNU General Public License for more details.␊ |
| 13 | *␊ |
| 14 | * Documents produced by Doxygen are derivative works derived from the␊ |
| 15 | * input used in their production; they are not affected by this license.␊ |
| 16 | *␊ |
| 17 | */␊ |
| 18 | #ifndef _BUFSTR_H␊ |
| 19 | #define _BUFSTR_H␊ |
| 20 | ␊ |
| 21 | #include "qtbc.h"␊ |
| 22 | #include <stdio.h>␊ |
| 23 | #include <stdlib.h>␊ |
| 24 | ␊ |
| 25 | /*! @brief Buffer used to store strings␊ |
| 26 | * ␊ |
| 27 | * This buffer is used append characters and strings. It will automatically␊ |
| 28 | * resize itself, yet provide efficient random access to the content.␊ |
| 29 | */␊ |
| 30 | class BufStr ␊ |
| 31 | {␊ |
| 32 | public:␊ |
| 33 | BufStr(int size) ␊ |
| 34 | : m_size(size), m_writeOffset(0), m_spareRoom(10240), m_buf(0) ␊ |
| 35 | {␊ |
| 36 | m_buf = (char *)malloc(size);␊ |
| 37 | }␊ |
| 38 | ~BufStr()␊ |
| 39 | {␊ |
| 40 | free(m_buf);␊ |
| 41 | }␊ |
| 42 | void addChar(char c)␊ |
| 43 | {␊ |
| 44 | makeRoomFor(1);␊ |
| 45 | m_buf[m_writeOffset++]=c;␊ |
| 46 | }␊ |
| 47 | void addArray(const char *a,int len)␊ |
| 48 | {␊ |
| 49 | makeRoomFor(len);␊ |
| 50 | memcpy(m_buf+m_writeOffset,a,len);␊ |
| 51 | m_writeOffset+=len;␊ |
| 52 | }␊ |
| 53 | void skip(uint s)␊ |
| 54 | {␊ |
| 55 | makeRoomFor(s);␊ |
| 56 | m_writeOffset+=s;␊ |
| 57 | }␊ |
| 58 | void shrink( uint newlen )␊ |
| 59 | {␊ |
| 60 | m_writeOffset=newlen;␊ |
| 61 | resize(newlen);␊ |
| 62 | }␊ |
| 63 | void resize( uint newlen )␊ |
| 64 | {␊ |
| 65 | m_size=newlen;␊ |
| 66 | if (m_writeOffset>=m_size) // offset out of range -> enlarge␊ |
| 67 | {␊ |
| 68 | m_size=m_writeOffset+m_spareRoom;␊ |
| 69 | }␊ |
| 70 | m_buf = (char *)realloc(m_buf,m_size);␊ |
| 71 | }␊ |
| 72 | int size() const␊ |
| 73 | {␊ |
| 74 | return m_size;␊ |
| 75 | }␊ |
| 76 | char *data() const␊ |
| 77 | {␊ |
| 78 | return m_buf;␊ |
| 79 | }␊ |
| 80 | char &at(uint i) const␊ |
| 81 | {␊ |
| 82 | return m_buf[i];␊ |
| 83 | }␊ |
| 84 | bool isEmpty() const␊ |
| 85 | {␊ |
| 86 | return m_writeOffset==0;␊ |
| 87 | }␊ |
| 88 | operator const char *() const␊ |
| 89 | {␊ |
| 90 | return m_buf;␊ |
| 91 | }␊ |
| 92 | uint curPos() const␊ |
| 93 | { ␊ |
| 94 | return m_writeOffset; ␊ |
| 95 | }␊ |
| 96 | void dropFromStart(uint bytes)␊ |
| 97 | {␊ |
| 98 | if (bytes>m_size) bytes=m_size;␊ |
| 99 | if (bytes>0) qmemmove(m_buf,m_buf+bytes,m_size-bytes);␊ |
| 100 | m_size-=bytes;␊ |
| 101 | m_writeOffset-=bytes;␊ |
| 102 | }␊ |
| 103 | private:␊ |
| 104 | void makeRoomFor(uint size)␊ |
| 105 | {␊ |
| 106 | if (m_writeOffset+size>=m_size) ␊ |
| 107 | {␊ |
| 108 | resize(m_size+size+m_spareRoom);␊ |
| 109 | }␊ |
| 110 | }␊ |
| 111 | uint m_size;␊ |
| 112 | uint m_writeOffset;␊ |
| 113 | const int m_spareRoom; // 10Kb extra room to avoid frequent resizing␊ |
| 114 | char *m_buf;␊ |
| 115 | };␊ |
| 116 | ␊ |
| 117 | ␊ |
| 118 | #endif␊ |
| 119 | |
