2 PROJECT: FlowerSoft C++ library
3 FILE : string-convert.cc
10 #include "libc-extension.hh"
12 #include "string-convert.hh"
13 #include "rational.hh"
16 a safe length for stringconversion buffers
18 worst case would be %f printing HUGE (or 1/HUGE), which is approx
19 2e318, this number would have approx 318 zero's in its string.
21 Should enlarge buff dynamically.
26 static const int STRING_BUFFER_LEN=1024;
29 String_convert::bin2hex_str (String bin_str)
32 Byte const* byte_C = bin_str.byte_C();
33 for (int i = 0; i < bin_str.length_i(); i++)
35 str += (char)nibble2hex_byte (*byte_C >> 4);
36 str += (char)nibble2hex_byte (*byte_C++);
42 String_convert::bin2_i (String bin_str)
44 return bin2_u (bin_str);
48 String_convert::bin2_u (String bin_str)
50 assert (bin_str.length_i() <= (int)sizeof(unsigned));
52 unsigned result_u = 0;
53 for (int i = 0; i < bin_str.length_i(); i++)
56 result_u += (Byte)bin_str[ i ];
61 // breendet imp from String
63 String_convert::dec2_i (String dec_str)
65 if (!dec_str.length_i())
69 int conv = sscanf (dec_str.ch_C(), "%ld", &l);
76 String_convert::i64_str (I64 i64, char const* fmt)
78 char buffer[STRING_BUFFER_LEN];
79 snprintf (buffer, STRING_BUFFER_LEN,
80 (fmt ? fmt : "%Ld"), i64); // assume radix 10
81 return String (buffer);
84 // breendet imp from String
86 String_convert::dec2_f (String dec_str)
88 if (!dec_str.length_i())
91 int conv = sscanf (dec_str.ch_C(), "%lf", &d);
97 String_convert::hex2bin_i (String hex_str, String& bin_str_r)
99 if (hex_str.length_i() % 2)
100 hex_str = "0" + hex_str;
103 Byte const* byte_C= hex_str.byte_C();
105 while (i < hex_str.length_i())
107 int high_i = hex2nibble_i (*byte_C++);
108 int low_i = hex2nibble_i (*byte_C++);
109 if (high_i < 0 || low_i < 0)
110 return 1; // illegal char
111 bin_str_r += String ((char)(high_i << 4 | low_i), 1 );
118 String_convert::hex2bin_str (String hex_str)
121 // silly, asserts should alway be "on"!
122 // assert (!hex2bin_i (hex_str, str) );
123 int error_i = hex2bin_i (hex_str, str);
129 String_convert::hex2nibble_i (Byte byte)
131 if (byte >= '0' && byte <= '9')
133 if (byte >= 'A' && byte <= 'F')
134 return byte - 'A' + 10;
135 if (byte >= 'a' && byte <= 'f')
136 return byte - 'a' + 10;
140 // stupido. Should use int_str()
142 String_convert::i2dec_str (int i, int length_i, char ch)
152 return String (fill_ch, length_i - dec_str.length_i()) + dec_str;
156 // stupido. Should use int_str()
158 String_convert::u2hex_str (unsigned u, int length_i, char fill_ch)
167 str = String ((char)((u % 16)["0123456789abcdef"] ) ) + str;
171 str += int_str (u, "%x"); // hmm. %lx vs. %x -> portability?
174 str = String (fill_ch, length_i - str.length_i()) + str;
175 while ((str.length_i() > length_i) && (str[ 0 ] == 'f' ) )
176 str = str.cut (2, INT_MAX);
182 String_convert::i2hex_str (int i, int length_i, char fill_ch)
184 return u2hex_str ((unsigned)i, length_i, fill_ch);
188 String_convert::nibble2hex_byte (Byte byte)
190 if ((byte & 0x0f) <= 9 )
191 return (byte & 0x0f) + '0';
193 return (byte & 0x0f) - 10 + 'a';
196 Convert an integer to a string
199 #fmt# is a printf style format, default assumes "%d" as format.
202 String_convert::int_str (int i, char const* fmt)
204 char buffer[STRING_BUFFER_LEN];
205 snprintf (buffer, STRING_BUFFER_LEN,
206 (fmt ? fmt : "%d"), i); // assume radix 10
207 return String (buffer);
211 Convert a double to a string.
213 @param #fmt# is a printf style format, default assumes "%lf" as format
216 String_convert::double_str (double f, char const* fmt)
218 char buf[STRING_BUFFER_LEN];
220 snprintf (buf, STRING_BUFFER_LEN, fmt ? fmt : "%f", f);
225 Make a string from a single character.
228 #n# is a repetition count, default value is 1
231 String_convert::char_str (char c, int n)
234 char* ch_p = new char[ n ];
236 String s ((Byte*)ch_p, n);
242 String_convert::rational_str (Rational r)
248 String_convert::pointer_str (void const *l)
250 char buffer[STRING_BUFFER_LEN];
251 snprintf (buffer, STRING_BUFFER_LEN, "%p", l); // assume radix 10
252 return String (buffer);
256 Convert a double to a string.
259 #n# is the number of nonzero digits
262 String_convert::precision_str (double x, int n)
264 String format = "%." + String (0 >? n - 1) + "e";
265 String str = double_str (abs (x), format.ch_C ());
267 int exp = str.right_str (3).value_i ();
268 str = str.left_str (str.length_i () - 4);
270 while (str[str.length_i () - 1] == '0')
271 str = str.left_str (str.length_i () - 1);
272 if (str[str.length_i () - 1] == '.')
273 str = str.left_str (str.length_i () - 1);
276 return (sign (x) > 0 ? str : "-" + str);
278 str = str.left_str (1) + str.cut (2, INT_MAX);
281 str = "0." + String ('0', -dot) + str;
282 else if (dot >= str.length_i ())
283 str += String ('0', dot - str.length_i ());
284 else if (( dot > 0) && (dot < str.length_i ()))
285 str = str.left_str (dot) + '.' + str.cut (dot, INT_MAX);
289 return (sign (x) > 0 ? str : "-" + str);