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.
28 // hmm, this is shorter even than PATH_MAX
29 static const int STRING_BUFFER_LEN=1024;
32 String_convert::bool_str (bool b)
34 return String (b ? "true" : "false");
38 String_convert::bin2hex_str (String bin_str)
41 Byte const* byte_C = bin_str.byte_C();
42 for (int i = 0; i < bin_str.length_i(); i++)
44 str += to_str ((char)nibble2hex_byte (*byte_C >> 4));
45 str += to_str ((char)nibble2hex_byte (*byte_C++));
51 String_convert::bin2_i (String bin_str)
53 return bin2_u (bin_str);
57 String_convert::bin2_u (String bin_str)
59 assert (bin_str.length_i() <= (int)sizeof(unsigned));
61 unsigned result_u = 0;
62 for (int i = 0; i < bin_str.length_i(); i++)
65 result_u += (Byte)bin_str[ i ];
70 // breendet imp from String
72 String_convert::dec2_i (String dec_str)
74 if (!dec_str.length_i())
78 int conv = sscanf (dec_str.ch_C(), "%ld", &l);
85 String_convert::i64_str (I64 i64, char const* fmt)
87 char buffer[STRING_BUFFER_LEN];
88 snprintf (buffer, STRING_BUFFER_LEN,
89 (fmt ? fmt : "%Ld"), i64); // assume radix 10
90 return String (buffer);
93 // breendet imp from String
95 String_convert::dec2_f (String dec_str)
97 if (!dec_str.length_i())
100 int conv = sscanf (dec_str.ch_C(), "%lf", &d);
106 String_convert::hex2bin_i (String hex_str, String& bin_str_r)
108 if (hex_str.length_i() % 2)
109 hex_str = "0" + hex_str;
112 Byte const* byte_C= hex_str.byte_C();
114 while (i < hex_str.length_i())
116 int high_i = hex2nibble_i (*byte_C++);
117 int low_i = hex2nibble_i (*byte_C++);
118 if (high_i < 0 || low_i < 0)
119 return 1; // illegal char
120 bin_str_r += to_str ((char)(high_i << 4 | low_i), 1 );
127 String_convert::hex2bin_str (String hex_str)
130 // silly, asserts should alway be "on"!
131 // assert (!hex2bin_i (hex_str, str) );
132 int error_i = hex2bin_i (hex_str, str);
138 String_convert::hex2nibble_i (Byte byte)
140 if (byte >= '0' && byte <= '9')
142 if (byte >= 'A' && byte <= 'F')
143 return byte - 'A' + 10;
144 if (byte >= 'a' && byte <= 'f')
145 return byte - 'a' + 10;
149 // stupido. Should use int_str()
151 String_convert::i2dec_str (int i, int length_i, char ch)
158 String dec_str = to_str (i);
161 return to_str (fill_ch, length_i - dec_str.length_i()) + dec_str;
165 // stupido. Should use int_str()
167 String_convert::u2hex_str (unsigned u, int length_i, char fill_ch)
176 str = to_str ((char)((u % 16)["0123456789abcdef"] ) ) + str;
180 str += int_str (u, "%x"); // hmm. %lx vs. %x -> portability?
183 str = to_str (fill_ch, length_i - str.length_i()) + str;
184 while ((str.length_i() > length_i) && (str[ 0 ] == 'f' ) )
185 str = str.cut_str (2, INT_MAX);
191 String_convert::i2hex_str (int i, int length_i, char fill_ch)
193 return u2hex_str ((unsigned)i, length_i, fill_ch);
197 String_convert::nibble2hex_byte (Byte byte)
199 if ((byte & 0x0f) <= 9 )
200 return (byte & 0x0f) + '0';
202 return (byte & 0x0f) - 10 + 'a';
205 Convert an integer to a string
208 #fmt# is a printf style format, default assumes "%d" as format.
211 String_convert::int_str (int i, char const* fmt)
213 char buffer[STRING_BUFFER_LEN];
214 snprintf (buffer, STRING_BUFFER_LEN,
215 (fmt ? fmt : "%d"), i); // assume radix 10
216 return String (buffer);
220 String_convert::form_str (char const* format, ...)
223 va_start (args, format);
224 char buffer[STRING_BUFFER_LEN];
225 vsnprintf (buffer, STRING_BUFFER_LEN, format, args);
227 return String (buffer);
231 String_convert::vform_str (char const* format, va_list args)
233 char buffer[STRING_BUFFER_LEN];
234 vsnprintf (buffer, STRING_BUFFER_LEN, format, args);
235 return String (buffer);
239 Convert a double to a string.
241 @param #fmt# is a printf style format, default assumes "%lf" as format
244 String_convert::double_str (double f, char const* fmt)
246 char buf[STRING_BUFFER_LEN];
248 snprintf (buf, STRING_BUFFER_LEN, fmt ? fmt : "%f", f);
253 Make a string from a single character.
256 #n# is a repetition count, default value is 1
259 String_convert::char_str (char c, int n)
262 char* ch_p = new char[ n ];
264 String s ((Byte*)ch_p, n);
270 String_convert::rational_str (Rational r)
276 String_convert::pointer_str (void const *l)
278 char buffer[STRING_BUFFER_LEN];
279 snprintf (buffer, STRING_BUFFER_LEN, "%p", l); // assume radix 10
280 return String (buffer);
284 Convert a double to a string.
287 #n# is the number of nonzero digits
290 String_convert::precision_str (double x, int n)
292 String format = "%." + to_str (0 >? n - 1) + "e";
293 String str = double_str (abs (x), format.ch_C ());
295 int exp = str.right_str (3).value_i ();
296 str = str.left_str (str.length_i () - 4);
298 while (str[str.length_i () - 1] == '0')
299 str = str.left_str (str.length_i () - 1);
300 if (str[str.length_i () - 1] == '.')
301 str = str.left_str (str.length_i () - 1);
304 return (sign (x) > 0 ? str : "-" + str);
306 str = str.left_str (1) + str.cut_str (2, INT_MAX);
309 str = "0." + to_str ('0', -dot) + str;
310 else if (dot >= str.length_i ())
311 str += to_str ('0', dot - str.length_i ());
312 else if (( dot > 0) && (dot < str.length_i ()))
313 str = str.left_str (dot) + "." + str.cut_str (dot, INT_MAX);
317 return (sign (x) > 0 ? str : "-" + str);
321 String_convert::split_arr (String str, char c)
324 int i = str.index_i (c);
327 String s = str.left_str (i);
329 while (str[++i] == c)
331 str = str.cut_str (i, INT_MAX);
341 String_convert::long_str (long l)
343 char s[STRING_BUFFER_LEN];
344 sprintf (s,"%ld", l);