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::bool_str (bool b)
32 return String (b ? "true" : "false");
36 String_convert::bin2hex_str (String bin_str)
39 Byte const* byte_C = bin_str.byte_C();
40 for (int i = 0; i < bin_str.length_i(); i++)
42 str += to_str ((char)nibble2hex_byte (*byte_C >> 4));
43 str += to_str ((char)nibble2hex_byte (*byte_C++));
49 String_convert::bin2_i (String bin_str)
51 return bin2_u (bin_str);
55 String_convert::bin2_u (String bin_str)
57 assert (bin_str.length_i() <= (int)sizeof(unsigned));
59 unsigned result_u = 0;
60 for (int i = 0; i < bin_str.length_i(); i++)
63 result_u += (Byte)bin_str[ i ];
68 // breendet imp from String
70 String_convert::dec2_i (String dec_str)
72 if (!dec_str.length_i())
76 int conv = sscanf (dec_str.ch_C(), "%ld", &l);
83 String_convert::i64_str (I64 i64, char const* fmt)
85 char buffer[STRING_BUFFER_LEN];
86 snprintf (buffer, STRING_BUFFER_LEN,
87 (fmt ? fmt : "%Ld"), i64); // assume radix 10
88 return String (buffer);
91 // breendet imp from String
93 String_convert::dec2_f (String dec_str)
95 if (!dec_str.length_i())
98 int conv = sscanf (dec_str.ch_C(), "%lf", &d);
104 String_convert::hex2bin_i (String hex_str, String& bin_str_r)
106 if (hex_str.length_i() % 2)
107 hex_str = "0" + hex_str;
110 Byte const* byte_C= hex_str.byte_C();
112 while (i < hex_str.length_i())
114 int high_i = hex2nibble_i (*byte_C++);
115 int low_i = hex2nibble_i (*byte_C++);
116 if (high_i < 0 || low_i < 0)
117 return 1; // illegal char
118 bin_str_r += to_str ((char)(high_i << 4 | low_i), 1 );
125 String_convert::hex2bin_str (String hex_str)
128 // silly, asserts should alway be "on"!
129 // assert (!hex2bin_i (hex_str, str) );
130 int error_i = hex2bin_i (hex_str, str);
136 String_convert::hex2nibble_i (Byte byte)
138 if (byte >= '0' && byte <= '9')
140 if (byte >= 'A' && byte <= 'F')
141 return byte - 'A' + 10;
142 if (byte >= 'a' && byte <= 'f')
143 return byte - 'a' + 10;
147 // stupido. Should use int_str()
149 String_convert::i2dec_str (int i, int length_i, char ch)
156 String dec_str = to_str (i);
159 return to_str (fill_ch, length_i - dec_str.length_i()) + dec_str;
163 // stupido. Should use int_str()
165 String_convert::u2hex_str (unsigned u, int length_i, char fill_ch)
174 str = to_str ((char)((u % 16)["0123456789abcdef"] ) ) + str;
178 str += int_str (u, "%x"); // hmm. %lx vs. %x -> portability?
181 str = to_str (fill_ch, length_i - str.length_i()) + str;
182 while ((str.length_i() > length_i) && (str[ 0 ] == 'f' ) )
183 str = str.cut_str (2, INT_MAX);
189 String_convert::i2hex_str (int i, int length_i, char fill_ch)
191 return u2hex_str ((unsigned)i, length_i, fill_ch);
195 String_convert::nibble2hex_byte (Byte byte)
197 if ((byte & 0x0f) <= 9 )
198 return (byte & 0x0f) + '0';
200 return (byte & 0x0f) - 10 + 'a';
203 Convert an integer to a string
206 #fmt# is a printf style format, default assumes "%d" as format.
209 String_convert::int_str (int i, char const* fmt)
211 char buffer[STRING_BUFFER_LEN];
212 snprintf (buffer, STRING_BUFFER_LEN,
213 (fmt ? fmt : "%d"), i); // assume radix 10
214 return String (buffer);
218 String_convert::form_str (char const* format, ...)
221 va_start (args, format);
222 char buffer[STRING_BUFFER_LEN];
223 vsnprintf (buffer, STRING_BUFFER_LEN, format, args);
225 return String (buffer);
229 String_convert::vform_str (char const* format, va_list args)
231 char buffer[STRING_BUFFER_LEN];
232 vsnprintf (buffer, STRING_BUFFER_LEN, format, args);
233 return String (buffer);
237 Convert a double to a string.
239 @param #fmt# is a printf style format, default assumes "%lf" as format
242 String_convert::double_str (double f, char const* fmt)
244 char buf[STRING_BUFFER_LEN];
246 snprintf (buf, STRING_BUFFER_LEN, fmt ? fmt : "%f", f);
251 Make a string from a single character.
254 #n# is a repetition count, default value is 1
257 String_convert::char_str (char c, int n)
260 char* ch_p = new char[ n ];
262 String s ((Byte*)ch_p, n);
268 String_convert::rational_str (Rational r)
274 String_convert::pointer_str (void const *l)
276 char buffer[STRING_BUFFER_LEN];
277 snprintf (buffer, STRING_BUFFER_LEN, "%p", l); // assume radix 10
278 return String (buffer);
282 Convert a double to a string.
285 #n# is the number of nonzero digits
288 String_convert::precision_str (double x, int n)
290 String format = "%." + to_str (0 >? n - 1) + "e";
291 String str = double_str (abs (x), format.ch_C ());
293 int exp = str.right_str (3).value_i ();
294 str = str.left_str (str.length_i () - 4);
296 while (str[str.length_i () - 1] == '0')
297 str = str.left_str (str.length_i () - 1);
298 if (str[str.length_i () - 1] == '.')
299 str = str.left_str (str.length_i () - 1);
302 return (sign (x) > 0 ? str : "-" + str);
304 str = str.left_str (1) + str.cut_str (2, INT_MAX);
307 str = "0." + to_str ('0', -dot) + str;
308 else if (dot >= str.length_i ())
309 str += to_str ('0', dot - str.length_i ());
310 else if (( dot > 0) && (dot < str.length_i ()))
311 str = str.left_str (dot) + "." + str.cut_str (dot, INT_MAX);
315 return (sign (x) > 0 ? str : "-" + str);
319 String_convert::split_arr (String str, char c)
322 int i = str.index_i (c);
325 String s = str.left_str (i);
327 while (str[++i] == c)
329 str = str.cut_str (i, INT_MAX);
339 String_convert::long_str (long l)
341 char s[STRING_BUFFER_LEN];
342 sprintf (s,"%ld", l);