2 PROJECT: FlowerSoft C++ library
3 FILE : string-convert.cc
10 #include "libc-extension.hh"
12 #include "string-convert.hh"
15 a safe length for stringconversion buffers
17 worst case would be %f printing HUGE (or 1/HUGE), which is approx
18 2e318, this number would have approx 318 zero's in its string.
20 Should enlarge buff dynamically.
25 static const int STRING_BUFFER_LEN=1024;
28 String_convert::bin2hex_str (String bin_str)
31 Byte const* byte_C = bin_str.byte_C();
32 for (int i = 0; i < bin_str.length_i(); i++)
34 str += (char)nibble2hex_byte (*byte_C >> 4);
35 str += (char)nibble2hex_byte (*byte_C++);
41 String_convert::bin2_i (String bin_str)
43 return bin2_u (bin_str);
47 String_convert::bin2_u (String bin_str)
49 assert (bin_str.length_i() <= (int)sizeof(unsigned));
51 unsigned result_u = 0;
52 for (int i = 0; i < bin_str.length_i(); i++)
55 result_u += (Byte)bin_str[ i ];
60 // breendet imp from String
62 String_convert::dec2_i (String dec_str)
64 if (!dec_str.length_i())
68 int conv = sscanf (dec_str.ch_C(), "%ld", &l);
75 String_convert::i64_str (I64 i64, char const* fmt)
77 char buffer[STRING_BUFFER_LEN];
78 snprintf (buffer, STRING_BUFFER_LEN,
79 (fmt ? fmt : "%Ld"), i64); // assume radix 10
80 return String (buffer);
83 // breendet imp from String
85 String_convert::dec2_f (String dec_str)
87 if (!dec_str.length_i())
90 int conv = sscanf (dec_str.ch_C(), "%lf", &d);
96 String_convert::hex2bin_i (String hex_str, String& bin_str_r)
98 if (hex_str.length_i() % 2)
99 hex_str = "0" + hex_str;
102 Byte const* byte_C= hex_str.byte_C();
104 while (i < hex_str.length_i())
106 int high_i = hex2nibble_i (*byte_C++);
107 int low_i = hex2nibble_i (*byte_C++);
108 if (high_i < 0 || low_i < 0)
109 return 1; // illegal char
110 bin_str_r += String ((char)(high_i << 4 | low_i), 1 );
117 String_convert::hex2bin_str (String hex_str)
120 // silly, asserts should alway be "on"!
121 // assert (!hex2bin_i (hex_str, str) );
122 int error_i = hex2bin_i (hex_str, str);
128 String_convert::hex2nibble_i (Byte byte)
130 if (byte >= '0' && byte <= '9')
132 if (byte >= 'A' && byte <= 'F')
133 return byte - 'A' + 10;
134 if (byte >= 'a' && byte <= 'f')
135 return byte - 'a' + 10;
139 // stupido. Should use int_str()
141 String_convert::i2dec_str (int i, int length_i, char ch)
151 return String (fill_ch, length_i - dec_str.length_i()) + dec_str;
155 // stupido. Should use int_str()
157 String_convert::u2hex_str (unsigned u, int length_i, char fill_ch)
166 str = String ((char)((u % 16)["0123456789abcdef"] ) ) + str;
170 str += int_str (u, "%x"); // hmm. %lx vs. %x -> portability?
173 str = String (fill_ch, length_i - str.length_i()) + str;
174 while ((str.length_i() > length_i) && (str[ 0 ] == 'f' ) )
175 str = str.cut (2, INT_MAX);
181 String_convert::i2hex_str (int i, int length_i, char fill_ch)
183 return u2hex_str ((unsigned)i, length_i, fill_ch);
187 String_convert::nibble2hex_byte (Byte byte)
189 if ((byte & 0x0f) <= 9 )
190 return (byte & 0x0f) + '0';
192 return (byte & 0x0f) - 10 + 'a';
195 Convert an integer to a string
198 #fmt# is a printf style format, default assumes "%d" as format.
201 String_convert::int_str (int i, char const* fmt)
203 char buffer[STRING_BUFFER_LEN];
204 snprintf (buffer, STRING_BUFFER_LEN,
205 (fmt ? fmt : "%d"), i); // assume radix 10
206 return String (buffer);
210 Convert a double to a string.
212 @param #fmt# is a printf style format, default assumes "%lf" as format
215 String_convert::double_str (double f, char const* fmt)
217 char buf[STRING_BUFFER_LEN];
219 snprintf (buf, STRING_BUFFER_LEN, fmt ? fmt : "%f", f);
224 Make a string from a single character.
227 #n# is a repetition count, default value is 1
230 String_convert::char_str (char c, int n)
233 char* ch_p = new char[ n ];
235 String s ((Byte*)ch_p, n);
241 String_convert::rational_str (Rational r)
243 char * n = Itoa (r.numerator()); // LEAK????
246 if (r.denominator() != 1)
248 char * d = Itoa (r.denominator());
249 s += String ('/') + String (d);
258 String_convert::pointer_str (void const *l)
260 char buffer[STRING_BUFFER_LEN];
261 snprintf (buffer, STRING_BUFFER_LEN, "%p", l); // assume radix 10
262 return String (buffer);
266 Convert a double to a string.
269 #n# is the number of nonzero digits
272 String_convert::precision_str (double x, int n)
274 String format = "%." + String (0 >? n - 1) + "e";
275 String str = double_str (abs (x), format.ch_C ());
277 int exp = str.right_str (3).value_i ();
278 str = str.left_str (str.length_i () - 4);
280 while (str[str.length_i () - 1] == '0')
281 str = str.left_str (str.length_i () - 1);
282 if (str[str.length_i () - 1] == '.')
283 str = str.left_str (str.length_i () - 1);
286 return (sign (x) > 0 ? str : "-" + str);
288 str = str.left_str (1) + str.cut (2, INT_MAX);
291 str = "0." + String ('0', -dot) + str;
292 else if (dot >= str.length_i ())
293 str += String ('0', dot - str.length_i ());
294 else if (( dot > 0) && (dot < str.length_i ()))
295 str = str.left_str (dot) + '.' + str.cut (dot, INT_MAX);
299 return (sign (x) > 0 ? str : "-" + str);