2 PROJECT: FlowerSoft C++ library
3 FILE : string-convert.cc
10 #include "libc-extension.hh"
12 #include "string-convert.hh"
13 #include "rational.hh"
17 a safe length for stringconversion buffers
19 worst case would be %f printing HUGE (or 1/HUGE), which is approx
20 2e318, this number would have approx 318 zero's in its string.
22 Should enlarge buff dynamically.
27 static const int STRING_BUFFER_LEN=1024;
30 String_convert::bin2hex_str (String bin_str)
33 Byte const* byte_C = bin_str.byte_C();
34 for (int i = 0; i < bin_str.length_i(); i++)
36 str += (char)nibble2hex_byte (*byte_C >> 4);
37 str += (char)nibble2hex_byte (*byte_C++);
43 String_convert::bin2_i (String bin_str)
45 return bin2_u (bin_str);
49 String_convert::bin2_u (String bin_str)
51 assert (bin_str.length_i() <= (int)sizeof(unsigned));
53 unsigned result_u = 0;
54 for (int i = 0; i < bin_str.length_i(); i++)
57 result_u += (Byte)bin_str[ i ];
62 // breendet imp from String
64 String_convert::dec2_i (String dec_str)
66 if (!dec_str.length_i())
70 int conv = sscanf (dec_str.ch_C(), "%ld", &l);
77 String_convert::i64_str (I64 i64, char const* fmt)
79 char buffer[STRING_BUFFER_LEN];
80 snprintf (buffer, STRING_BUFFER_LEN,
81 (fmt ? fmt : "%Ld"), i64); // assume radix 10
82 return String (buffer);
85 // breendet imp from String
87 String_convert::dec2_f (String dec_str)
89 if (!dec_str.length_i())
92 int conv = sscanf (dec_str.ch_C(), "%lf", &d);
98 String_convert::hex2bin_i (String hex_str, String& bin_str_r)
100 if (hex_str.length_i() % 2)
101 hex_str = "0" + hex_str;
104 Byte const* byte_C= hex_str.byte_C();
106 while (i < hex_str.length_i())
108 int high_i = hex2nibble_i (*byte_C++);
109 int low_i = hex2nibble_i (*byte_C++);
110 if (high_i < 0 || low_i < 0)
111 return 1; // illegal char
112 bin_str_r += String ((char)(high_i << 4 | low_i), 1 );
119 String_convert::hex2bin_str (String hex_str)
122 // silly, asserts should alway be "on"!
123 // assert (!hex2bin_i (hex_str, str) );
124 int error_i = hex2bin_i (hex_str, str);
130 String_convert::hex2nibble_i (Byte byte)
132 if (byte >= '0' && byte <= '9')
134 if (byte >= 'A' && byte <= 'F')
135 return byte - 'A' + 10;
136 if (byte >= 'a' && byte <= 'f')
137 return byte - 'a' + 10;
141 // stupido. Should use int_str()
143 String_convert::i2dec_str (int i, int length_i, char ch)
153 return String (fill_ch, length_i - dec_str.length_i()) + dec_str;
157 // stupido. Should use int_str()
159 String_convert::u2hex_str (unsigned u, int length_i, char fill_ch)
168 str = String ((char)((u % 16)["0123456789abcdef"] ) ) + str;
172 str += int_str (u, "%x"); // hmm. %lx vs. %x -> portability?
175 str = String (fill_ch, length_i - str.length_i()) + str;
176 while ((str.length_i() > length_i) && (str[ 0 ] == 'f' ) )
177 str = str.cut (2, INT_MAX);
183 String_convert::i2hex_str (int i, int length_i, char fill_ch)
185 return u2hex_str ((unsigned)i, length_i, fill_ch);
189 String_convert::nibble2hex_byte (Byte byte)
191 if ((byte & 0x0f) <= 9 )
192 return (byte & 0x0f) + '0';
194 return (byte & 0x0f) - 10 + 'a';
197 Convert an integer to a string
200 #fmt# is a printf style format, default assumes "%d" as format.
203 String_convert::int_str (int i, char const* fmt)
205 char buffer[STRING_BUFFER_LEN];
206 snprintf (buffer, STRING_BUFFER_LEN,
207 (fmt ? fmt : "%d"), i); // assume radix 10
208 return String (buffer);
212 Convert a double to a string.
214 @param #fmt# is a printf style format, default assumes "%lf" as format
217 String_convert::double_str (double f, char const* fmt)
219 char buf[STRING_BUFFER_LEN];
221 snprintf (buf, STRING_BUFFER_LEN, fmt ? fmt : "%f", f);
226 Make a string from a single character.
229 #n# is a repetition count, default value is 1
232 String_convert::char_str (char c, int n)
235 char* ch_p = new char[ n ];
237 String s ((Byte*)ch_p, n);
243 String_convert::rational_str (Rational r)
249 String_convert::pointer_str (void const *l)
251 char buffer[STRING_BUFFER_LEN];
252 snprintf (buffer, STRING_BUFFER_LEN, "%p", l); // assume radix 10
253 return String (buffer);
257 Convert a double to a string.
260 #n# is the number of nonzero digits
263 String_convert::precision_str (double x, int n)
265 String format = "%." + String (0 >? n - 1) + "e";
266 String str = double_str (abs (x), format.ch_C ());
268 int exp = str.right_str (3).value_i ();
269 str = str.left_str (str.length_i () - 4);
271 while (str[str.length_i () - 1] == '0')
272 str = str.left_str (str.length_i () - 1);
273 if (str[str.length_i () - 1] == '.')
274 str = str.left_str (str.length_i () - 1);
277 return (sign (x) > 0 ? str : "-" + str);
279 str = str.left_str (1) + str.cut (2, INT_MAX);
282 str = "0." + String ('0', -dot) + str;
283 else if (dot >= str.length_i ())
284 str += String ('0', dot - str.length_i ());
285 else if (( dot > 0) && (dot < str.length_i ()))
286 str = str.left_str (dot) + '.' + str.cut (dot, INT_MAX);
290 return (sign (x) > 0 ? str : "-" + str);
294 String_convert::split_arr (String str, char c)
297 int i = str.index_i (c);
300 String s = str.left_str (i);
302 str = str.cut (i + 1, INT_MAX);