flower/string-convert.cc

   1 /*
   2   PROJECT: FlowerSoft C++ library
   3   FILE   : string-convert.cc
   4
   5 --*/
   6
   7
   8 #include <assert.h>
   9 #include <limits.h>
  10 #include "libc-extension.hh"
  11 #include "string.hh"
  12 #include "string-convert.hh"
  13
  14 /**
  15    a safe length for stringconversion buffers
  16
  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.
  19
  20    Should enlarge buff dynamically.
  21
  22    @see
  23    man 3 snprintf
  24    */
  25 static const int STRING_BUFFER_LEN=1024;
  26
  27 String
  28 String_convert::bin2hex_str (String bin_str)
  29 {
  30   String str;
  31   Byte const* byte_C = bin_str.byte_C();
  32   for ( int i = 0; i < bin_str.length_i(); i++)
  33     {
  34         str += (char)nibble2hex_byte (*byte_C >> 4);
  35         str += (char)nibble2hex_byte (*byte_C++);
  36     }
  37   return str;
  38 }
  39
  40 int
  41 String_convert::bin2_i (String bin_str)
  42 {
  43   return bin2_u (bin_str);
  44 }
  45
  46 unsigned
  47 String_convert::bin2_u (String bin_str)
  48 {
  49   assert (bin_str.length_i() <= (int)sizeof(unsigned));
  50
  51   unsigned result_u = 0;
  52   for ( int i = 0; i < bin_str.length_i(); i++)
  53     {
  54         result_u <<= 8;
  55         result_u += (Byte)bin_str[ i ];
  56     }
  57   return result_u;
  58 }
  59
  60 // breendet imp from String
  61 int
  62 String_convert::dec2_i (String dec_str)
  63 {
  64   if ( !dec_str.length_i())
  65         return 0;
  66
  67   long l = 0;
  68   int conv = sscanf (dec_str.ch_C(), "%ld", &l);
  69   assert (conv);
  70
  71   return (int)l;
  72 }
  73
  74 String
  75 String_convert::i64_str (I64 i64, char const* fmt)
  76 {
  77   char buffer[STRING_BUFFER_LEN];
  78   snprintf (buffer, STRING_BUFFER_LEN,
  79              (fmt ? fmt : "%Ld"), i64);     // assume radix 10
  80   return String (buffer);
  81
  82 }
  83 // breendet imp from String
  84 double
  85 String_convert::dec2_f (String dec_str)
  86 {
  87   if ( !dec_str.length_i())
  88         return 0;
  89   double d = 0;
  90   int conv = sscanf (dec_str.ch_C(), "%lf", &d);
  91   assert (conv);
  92   return d;
  93 }
  94
  95 int
  96 String_convert::hex2bin_i (String hex_str, String& bin_str_r)
  97 {
  98   if ( hex_str.length_i() % 2)
  99       hex_str = "0" + hex_str;
 100
 101   bin_str_r = "";
 102   Byte const* byte_C= hex_str.byte_C();
 103   int i = 0;
 104   while ( i < hex_str.length_i())
 105     {
 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 );
 111       i += 2;
 112     }
 113   return 0;
 114 }
 115
 116 String
 117 String_convert::hex2bin_str (String hex_str)
 118 {
 119   String str;
 120 //  silly, asserts should alway be "on"!
 121 //    assert (!hex2bin_i (hex_str, str) );
 122   int error_i = hex2bin_i (hex_str, str);
 123   assert (!error_i);
 124   return str;
 125 }
 126
 127 int
 128 String_convert::hex2nibble_i (Byte byte)
 129 {
 130   if ( byte >= '0' && byte <= '9')
 131       return byte - '0';
 132   if ( byte >= 'A' && byte <= 'F')
 133       return byte - 'A' + 10;
 134   if ( byte >= 'a' && byte <= 'f')
 135       return byte - 'a' + 10;
 136   return -1;
 137 }
 138
 139 // stupido.  Should use int_str()
 140 String
 141 String_convert::i2dec_str (int i, int length_i, char ch)
 142 {
 143   char fill_ch = ch;
 144   if ( fill_ch)
 145       fill_ch = '0';
 146
 147   // ugh
 148   String dec_str (i);
 149
 150   // ugh
 151   return String (fill_ch, length_i - dec_str.length_i()) + dec_str;
 152 }
 153
 154
 155 // stupido.  Should use int_str()
 156 String
 157 String_convert::u2hex_str (unsigned u, int length_i, char fill_ch)
 158 {
 159   String str;
 160   if ( !u)
 161         str = "0";
 162
 163 #if 1 // both go...
 164   while ( u)
 165     {
 166         str = String ((char)( ( u % 16)["0123456789abcdef"] ) ) + str;
 167         u /= 16;
 168     }
 169 #else
 170   str += int_str (u, "%x");     // hmm. %lx vs. %x -> portability?
 171 #endif
 172
 173   str = String (fill_ch, length_i - str.length_i()) + str;
 174   while ( ( str.length_i() > length_i) &&  ( str[ 0 ] == 'f' ) )
 175         str = str.mid_str (2, INT_MAX);
 176
 177   return str;
 178 }
 179
 180 String
 181 String_convert::i2hex_str (int i, int length_i, char fill_ch)
 182 {
 183   return u2hex_str ((unsigned)i, length_i, fill_ch);
 184 }
 185
 186 Byte
 187 String_convert::nibble2hex_byte (Byte byte)
 188 {
 189   if ( ( byte & 0x0f) <= 9 )
 190         return ( byte & 0x0f) + '0';
 191   else
 192         return ( byte & 0x0f) - 10 + 'a';
 193 }
 194 /**
 195   Convert an integer to a string
 196
 197   @param
 198   #fmt# is a printf style format, default assumes "%d" as format.
 199   */
 200 String
 201 String_convert::int_str (int i, char const* fmt)
 202 {
 203   char buffer[STRING_BUFFER_LEN];
 204   snprintf (buffer, STRING_BUFFER_LEN,
 205              (fmt ? fmt : "%d"), i);     // assume radix 10
 206   return String (buffer);
 207 }
 208
 209 /**
 210   Convert a double to a string.
 211
 212   @param #fmt# is a printf style format, default assumes "%lf" as format
 213  */
 214 String
 215 String_convert::double_str (double f, char const* fmt)
 216 {
 217   char buf[STRING_BUFFER_LEN];
 218
 219   snprintf (buf, STRING_BUFFER_LEN, fmt ? fmt : "%f", f);
 220   return String (buf);
 221 }
 222
 223 /**
 224   Make a string from a single character.
 225
 226   @param
 227   #n# is a repetition count, default value is 1
 228  */
 229 String
 230 String_convert::char_str (char c, int n)
 231 {
 232   n = n >= 0 ? n : 0;
 233   char* ch_p = new char[ n ];
 234   memset (ch_p, c, n);
 235   String s ((Byte*)ch_p, n);
 236   delete ch_p;
 237   return s;
 238 }
 239
 240 String
 241 String_convert::rational_str (Rational r)
 242 {
 243   char * n = Itoa (r.numerator()); // LEAK????
 244
 245   String s = n;
 246   if (r.denominator() != 1)
 247     {
 248         char * d = Itoa (r.denominator());
 249         s +=  String ('/') + String (d);
 250         //delete d;
 251     }
 252 /*    delete n;
 253   */
 254   return s;
 255 }
 256
 257 String
 258 String_convert::pointer_str (void const *l)
 259 {
 260   char buffer[STRING_BUFFER_LEN];
 261   snprintf (buffer, STRING_BUFFER_LEN, "%p", l);     // assume radix 10
 262   return String (buffer);
 263 }