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1/*
2 * Copyright (C) 2007-2011 Xagasoft, All rights reserved.
3 *
4 * This file is part of the libbu++ library and is released under the
5 * terms of the license contained in the file LICENSE.
6 */
7
8#ifndef BU_FORMATTER_H
9#define BU_FORMATTER_H
10
11#include "bu/string.h"
12#include "bu/fmt.h"
13
14#include <math.h>
15
16namespace Bu
17{
18 class Stream;
19
20 template<typename t> t tlog( t x );
21 template<> float tlog( float x );
22 template<> double tlog( double x );
23 template<> long double tlog( long double x );
24
25 template<typename t> t tfloor( t x );
26 template<> float tfloor( float x );
27 template<> double tfloor( double x );
28 template<> long double tfloor( long double x );
29
30 template<typename t> t tpow( t x, t y );
31 template<> float tpow( float x, float y );
32 template<> double tpow( double x, double y );
33 template<> long double tpow( long double x, long double y );
34
35 class Formatter
36 {
37 public:
38 Formatter( Stream &rStream );
39 virtual ~Formatter();
40
41 void write( const Bu::String &sStr );
42 void write( const void *sStr, int iLen );
43 void writeAligned( const Bu::String &sStr );
44 void writeAligned( const char *sStr, int iLen );
45
46 void read( void *sStr, int iLen );
47 Bu::String readToken();
48
49 void incIndent();
50 void decIndent();
51 void setIndent( uint8_t uLevel );
52 void clearIndent();
53 uint8_t getIndent() const { return uIndent; }
54 void setIndentChar( char cIndent );
55 char getIndentChar() const { return cIndent; }
56
57 void setFormat( const Fmt &f )
58 {
59 fLast = f;
60 bTempFmt = false;
61 }
62
63 void setTempFormat( const Fmt &f )
64 {
65 fLast = f;
66 bTempFmt = true;
67 }
68
69 void usedFormat()
70 {
71 if( bTempFmt )
72 fLast = Fmt();
73 }
74
75 template<typename type>
76 void ifmt( type i )
77 {
78 // This code is taken from Nango, hopefully we can make it better.
79 bool bNeg = i<0;
80 char cBase = fLast.bCaps?'A':'a';
81 char buf[sizeof(type)*8+1];
82 if( bNeg ) i = -i;
83 if( fLast.uRadix < 2 || fLast.uRadix > 36 )
84 {
85 usedFormat();
86 return;
87 }
88
89 for( int j = sizeof(type)*8; j >= 0; j-- )
90 {
91 int c = i%fLast.uRadix;
92 i /= fLast.uRadix;
93 buf[j] = (char)((c<10)?('0'+c):(cBase+c-10));
94 if( i == 0 )
95 {
96 if( bNeg ) buf[--j] = '-';
97 else if( fLast.bPlus ) buf[--j] = '+';
98 writeAligned( buf+j, sizeof(type)*8-j+1 );
99
100 return;
101 }
102 }
103 usedFormat();
104 }
105
106 template<typename type>
107 void ufmt( type i )
108 {
109 // This code is taken from Nango, hopefully we can make it better.
110 char buf[sizeof(type)*8+1];
111 char cBase = fLast.bCaps?'A':'a';
112 if( fLast.uRadix < 2 || fLast.uRadix > 36 )
113 {
114 usedFormat();
115 return;
116 }
117
118 for( int j = sizeof(type)*8; j >= 0; j-- )
119 {
120 int c = i%fLast.uRadix;
121 i /= fLast.uRadix;
122 buf[j] = (char)((c<10)?('0'+c):(cBase+c-10));
123 if( i == 0 )
124 {
125 if( fLast.bPlus ) buf[--j] = '+';
126 writeAligned( buf+j, sizeof(type)*8-j+1 );
127
128 return;
129 }
130 }
131 usedFormat();
132 }
133
134 template<typename type>
135 void ffmt( type f )
136 {
137 Bu::String fTmp;
138 char cBase = fLast.bCaps?'A':'a';
139 if( fLast.uRadix < 2 || fLast.uRadix > 36 )
140 {
141 usedFormat();
142 return;
143 }
144
145 if( signbit(f) )
146 {
147 f = -f;
148 fTmp += "-";
149 }
150 int iScale = tfloor(tlog( f ) / tlog( (type)fLast.uRadix ));
151 f /= tpow( (type)fLast.uRadix, (type)iScale );
152
153 if( iScale < 0 )
154 {
155 fTmp += "0.";
156 for( int j = 1; j < -iScale; j++ )
157 fTmp += '0';
158 }
159 int c = f;
160 fTmp += (char)((c<10)?('0'+c):(cBase+c-10));
161 f -= (int)f;
162 int j;
163 for( j = 0; j < 8 && f; j++ )
164 {
165 if( iScale - j == 0 )
166 fTmp += '.';
167 f = f*fLast.uRadix;
168 int c = f;
169 fTmp += (char)((c<10)?('0'+c):(cBase+c-10));
170 f -= (int)f;
171 }
172 if( iScale >= j )
173 {
174 for( int k = j; k < iScale; k++ )
175 fTmp += '0';
176 fTmp += ".0";
177 }
178
179 writeAligned( fTmp );
180 usedFormat();
181 }
182
183 template<typename type>
184 void iparse( type &i, const Bu::String &sBuf )
185 {
186 if( !sBuf.isSet() )
187 return;
188 if( sBuf[0] != '+' && sBuf[0] != '-' &&
189 (sBuf[0] < '0' && sBuf[0] > '9') )
190 return;
191 int j = 1;
192 int iMax = sBuf.getSize();
193 for(; j < iMax && (sBuf[j] >= '0' && sBuf[j] <= '9'); j++ ) { }
194 i = 0;
195 type iPos = 1;
196 for(j--; j >= 0; j-- )
197 {
198 if( sBuf[j] == '+' || sBuf[j] == '-' )
199 continue;
200 i += (sBuf[j]-'0')*iPos;
201 iPos *= fLast.uRadix;
202 }
203 if( sBuf[0] == '-' )
204 i = -i;
205
206 usedFormat();
207 }
208
209 template<typename type>
210 void uparse( type &i, const Bu::String &sBuf )
211 {
212 if( !sBuf.isSet() )
213 return;
214 if( sBuf[0] != '+' &&
215 (sBuf[0] < '0' && sBuf[0] > '9') )
216 return;
217 int j = 1;
218 int iMax = sBuf.getSize();
219 for(; j < iMax && (sBuf[j] >= '0' && sBuf[j] <= '9'); j++ ) { }
220 i = 0;
221 type iPos = 1;
222 for(j--; j >= 0; j-- )
223 {
224 if( sBuf[j] == '+' )
225 continue;
226 i += (sBuf[j]-'0')*iPos;
227 iPos *= fLast.uRadix;
228 }
229
230 usedFormat();
231 }
232
233 template<typename type>
234 void fparse( type &f, const Bu::String &sBuf )
235 {
236 double fIn;
237 sscanf( sBuf.getStr(), "%lf", &fIn );
238 f = fIn;
239 usedFormat();
240 }
241
242 enum Special
243 {
244 nl,
245 flush
246 };
247
248 void doFlush();
249
250 private:
251 Stream &rStream;
252 Fmt fLast;
253 bool bTempFmt;
254 uint8_t uIndent;
255 char cIndent;
256 };
257
258 Formatter &operator<<( Formatter &f, const Fmt &fmt );
259 Formatter &operator<<( Formatter &f, Formatter::Special s );
260 Formatter &operator<<( Formatter &f, const char *sStr );
261 Formatter &operator<<( Formatter &f, char *sStr );
262 Formatter &operator<<( Formatter &f, const Bu::String &sStr );
263 Formatter &operator<<( Formatter &f, signed char c );
264 Formatter &operator<<( Formatter &f, char c );
265 Formatter &operator<<( Formatter &f, unsigned char c );
266 Formatter &operator<<( Formatter &f, signed short i );
267 Formatter &operator<<( Formatter &f, unsigned short i );
268 Formatter &operator<<( Formatter &f, signed int i );
269 Formatter &operator<<( Formatter &f, unsigned int i );
270 Formatter &operator<<( Formatter &f, signed long i );
271 Formatter &operator<<( Formatter &f, unsigned long i );
272 Formatter &operator<<( Formatter &f, signed long long i );
273 Formatter &operator<<( Formatter &f, unsigned long long i );
274 Formatter &operator<<( Formatter &f, float flt );
275 Formatter &operator<<( Formatter &f, double flt );
276 Formatter &operator<<( Formatter &f, long double flt );
277 Formatter &operator<<( Formatter &f, bool b );
278
279 Formatter &operator>>( Formatter &f, Bu::String &sStr );
280 Formatter &operator>>( Formatter &f, signed char &c );
281 Formatter &operator>>( Formatter &f, char &c );
282 Formatter &operator>>( Formatter &f, unsigned char &c );
283 Formatter &operator>>( Formatter &f, signed short &i );
284 Formatter &operator>>( Formatter &f, unsigned short &i );
285 Formatter &operator>>( Formatter &f, signed int &i );
286 Formatter &operator>>( Formatter &f, unsigned int &i );
287 Formatter &operator>>( Formatter &f, signed long &i );
288 Formatter &operator>>( Formatter &f, unsigned long &i );
289 Formatter &operator>>( Formatter &f, signed long long &i );
290 Formatter &operator>>( Formatter &f, unsigned long long &i );
291 Formatter &operator>>( Formatter &f, float &flt );
292 Formatter &operator>>( Formatter &f, double &flt );
293 Formatter &operator>>( Formatter &f, long double &flt );
294 Formatter &operator>>( Formatter &f, bool &b );
295
296 template<typename type>
297 Formatter &operator<<( Formatter &f, const type *p )
298 {
299 return f << "0x" << Fmt::hex(sizeof(ptrdiff_t)*2) << (ptrdiff_t)(p);
300 }
301};
302
303#endif
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