2 PROJECT: FlowerSoft C++ library
3 FILE : string-convert.cc
11 #include "libc-extension.hh"
13 #include "string-convert.hh"
14 #include "rational.hh"
18 A safe length for stringconversion buffers.
20 worst case would be %f printing HUGE (or 1/HUGE), which is approx
21 2e318, this number would have approx 318 zero's in its string.
23 Should enlarge buff dynamically.
28 static const int STRING_BUFFER_LEN=1024;
31 String_convert::bool_str (bool b)
33 return String (b ? "true" : "false");
37 String_convert::bin2hex_str (String bin_str)
40 Byte const* byte_C = bin_str.byte_C();
41 for (int i = 0; i < bin_str.length_i(); i++)
43 str += to_str ((char)nibble2hex_byte (*byte_C >> 4));
44 str += to_str ((char)nibble2hex_byte (*byte_C++));
50 String_convert::bin2_i (String bin_str)
52 return bin2_u (bin_str);
56 String_convert::bin2_u (String bin_str)
58 assert (bin_str.length_i() <= (int)sizeof(unsigned));
60 unsigned result_u = 0;
61 for (int i = 0; i < bin_str.length_i(); i++)
64 result_u += (Byte)bin_str[ i ];
69 // breendet imp from String
71 String_convert::dec2_i (String dec_str)
73 if (!dec_str.length_i())
77 int conv = sscanf (dec_str.ch_C(), "%ld", &l);
84 String_convert::i64_str (I64 i64, char const* fmt)
86 char buffer[STRING_BUFFER_LEN];
87 snprintf (buffer, STRING_BUFFER_LEN,
88 (fmt ? fmt : "%Ld"), i64); // assume radix 10
89 return String (buffer);
92 // breendet imp from String
94 String_convert::dec2_f (String dec_str)
96 if (!dec_str.length_i())
99 int conv = sscanf (dec_str.ch_C(), "%lf", &d);
105 String_convert::hex2bin_i (String hex_str, String& bin_str_r)
107 if (hex_str.length_i() % 2)
108 hex_str = "0" + hex_str;
111 Byte const* byte_C= hex_str.byte_C();
113 while (i < hex_str.length_i())
115 int high_i = hex2nibble_i (*byte_C++);
116 int low_i = hex2nibble_i (*byte_C++);
117 if (high_i < 0 || low_i < 0)
118 return 1; // illegal char
119 bin_str_r += to_str ((char)(high_i << 4 | low_i), 1 );
126 String_convert::hex2bin_str (String hex_str)
129 // silly, asserts should alway be "on"!
130 // assert (!hex2bin_i (hex_str, str) );
131 int error_i = hex2bin_i (hex_str, str);
137 String_convert::hex2nibble_i (Byte byte)
139 if (byte >= '0' && byte <= '9')
141 if (byte >= 'A' && byte <= 'F')
142 return byte - 'A' + 10;
143 if (byte >= 'a' && byte <= 'f')
144 return byte - 'a' + 10;
148 // stupido. Should use int_str()
150 String_convert::i2dec_str (int i, int length_i, char ch)
157 String dec_str = to_str (i);
160 return to_str (fill_ch, length_i - dec_str.length_i()) + dec_str;
164 // stupido. Should use int_str()
166 String_convert::u2hex_str (unsigned u, int length_i, char fill_ch)
175 str = to_str ((char)((u % 16)["0123456789abcdef"] ) ) + str;
179 str += int_str (u, "%x"); // hmm. %lx vs. %x -> portability?
182 str = to_str (fill_ch, length_i - str.length_i()) + str;
183 while ((str.length_i() > length_i) && (str[ 0 ] == 'f' ) )
184 str = str.cut_str (2, INT_MAX);
190 String_convert::i2hex_str (int i, int length_i, char fill_ch)
192 return u2hex_str ((unsigned)i, length_i, fill_ch);
196 String_convert::nibble2hex_byte (Byte byte)
198 if ((byte & 0x0f) <= 9 )
199 return (byte & 0x0f) + '0';
201 return (byte & 0x0f) - 10 + 'a';
204 Convert an integer to a string
207 #fmt# is a printf style format, default assumes "%d" as format.
210 String_convert::int_str (int i, char const* fmt)
212 char buffer[STRING_BUFFER_LEN];
213 snprintf (buffer, STRING_BUFFER_LEN,
214 (fmt ? fmt : "%d"), i); // assume radix 10
215 return String (buffer);
219 String_convert::form_str (char const* format, ...)
222 va_start (args, format);
223 char buffer[STRING_BUFFER_LEN];
224 vsnprintf (buffer, STRING_BUFFER_LEN, format, args);
226 return String (buffer);
230 String_convert::vform_str (char const* format, va_list args)
232 char buffer[STRING_BUFFER_LEN];
233 vsnprintf (buffer, STRING_BUFFER_LEN, format, args);
234 return String (buffer);
238 Convert a double to a string.
240 @param #fmt# is a printf style format, default assumes "%lf" as format
243 String_convert::double_str (double f, char const* fmt)
245 char buf[STRING_BUFFER_LEN];
247 snprintf (buf, STRING_BUFFER_LEN, fmt ? fmt : "%f", f);
252 Make a string from a single character.
255 #n# is a repetition count, default value is 1
258 String_convert::char_str (char c, int n)
261 char* ch_p = new char[ n ];
263 String s ((Byte*)ch_p, n);
269 String_convert::rational_str (Rational r)
275 String_convert::pointer_str (void const *l)
277 char buffer[STRING_BUFFER_LEN];
278 snprintf (buffer, STRING_BUFFER_LEN, "%p", l); // assume radix 10
279 return String (buffer);
283 Convert a double to a string.
286 #n# is the number of nonzero digits
289 String_convert::precision_str (double x, int n)
291 String format = "%." + to_str (0 >? n - 1) + "e";
292 String str = double_str (abs (x), format.ch_C ());
294 int exp = str.right_str (3).value_i ();
295 str = str.left_str (str.length_i () - 4);
297 while (str[str.length_i () - 1] == '0')
298 str = str.left_str (str.length_i () - 1);
299 if (str[str.length_i () - 1] == '.')
300 str = str.left_str (str.length_i () - 1);
303 return (sign (x) > 0 ? str : "-" + str);
305 str = str.left_str (1) + str.cut_str (2, INT_MAX);
308 str = "0." + to_str ('0', -dot) + str;
309 else if (dot >= str.length_i ())
310 str += to_str ('0', dot - str.length_i ());
311 else if (( dot > 0) && (dot < str.length_i ()))
312 str = str.left_str (dot) + "." + str.cut_str (dot, INT_MAX);
316 return (sign (x) > 0 ? str : "-" + str);
320 String_convert::split_arr (String str, char c)
323 int i = str.index_i (c);
326 String s = str.left_str (i);
328 while (str[++i] == c)
330 str = str.cut_str (i, INT_MAX);
340 String_convert::long_str (long l)
342 char s[STRING_BUFFER_LEN];
343 sprintf (s,"%ld", l);