media-gfx/ipe/files/ipe-outputprecision.patch

   1 diff --git a/src/ipelib/ipebase.cpp b/src/ipelib/ipebase.cpp
   2 index 63de035..19226ad 100644
   3 --- a/src/ipelib/ipebase.cpp
   4 +++ b/src/ipelib/ipebase.cpp
   5 @@ -557,55 +557,50 @@ Stream &Stream::operator<<(int i)
   6  //! Output double.
   7  Stream &Stream::operator<<(double d)
   8  {
   9 -  char buf[30];
  10 -  if (d < 0.0) {
  11 -    putChar('-');
  12 -    d = -d;
  13 +  // Maximum number of digits in total
  14 +  const unsigned maxdigits=14;
  15 +
  16 +  const unsigned bufsize=511;
  17 +  char buf[bufsize+1];
  18 +
  19 +  // The number of digits left of '.'
  20 +  int intpartsize = 0;
  21 +  if( fabs(d)>=1.0 )
  22 +  {
  23 +    snprintf(buf, bufsize, "%.0f", fabs(d));
  24 +    intpartsize = strlen(buf);
  25    }
  26 -  if (d >= 1e9) {
  27 -    // PDF will not be able to read this, but we have to write something.
  28 -    // Such large numbers should only happen if something is wrong.
  29 -    std::sprintf(buf, "%g", d);
  30 -    putCString(buf);
  31 -  } else if (d < 1e-8) {
  32 -    putChar('0');
  33 -  } else {
  34 -    // Print six significant digits, but omit trailing zeros.
  35 -    // Probably I'll want to have adjustable precision later.
  36 -    int factor;
  37 -    if (d > 1000.0)
  38 -      factor = 100L;
  39 -    else if (d > 100.0)
  40 -      factor = 1000L;
  41 -    else if (d > 10.0)
  42 -      factor = 10000L;
  43 -    else if (d > 1.0)
  44 -      factor = 100000L;
  45 -    else if (d > 0.1)
  46 -      factor = 1000000L;
  47 -    else if (d > 0.01)
  48 -      factor = 10000000L;
  49 -    else
  50 -      factor = 100000000L;
  51 -    double dd = trunc(d);
  52 -    int intpart = int(dd + 0.5);
  53 -    // 10^9 < 2^31
  54 -    int v = int(factor * (d - dd) + 0.5);
  55 -    if (v >= factor) {
  56 -      ++intpart;
  57 -      v -= factor;
  58 -    }
  59 -    std::sprintf(buf, "%d", intpart);
  60 -    putCString(buf);
  61 -    int mask = factor / 10;
  62 -    if (v != 0) {
  63 -      putChar('.');
  64 -      while (v != 0) {
  65 -       putChar('0' + v / mask);
  66 -       v = (10 * v) % factor;
  67 -      }
  68 +
  69 +  // The nubmer of digits right of '.'
  70 +  int respartsize = maxdigits-intpartsize;
  71 +  if( respartsize < 0 )
  72 +    respartsize = 0;
  73 +
  74 +  // Building the format string and get the string conversion of d
  75 +  char fmt[256];
  76 +  snprintf(fmt, 255, "%%%d.%df", intpartsize, respartsize);
  77 +  snprintf(buf, bufsize, fmt, d);
  78 +
  79 +
  80 +  // Truncate redundant zeros and '.' from the right
  81 +  for(int i = strlen(buf)-1; i>=intpartsize; i--)
  82 +  {
  83 +    // Truncate all zeros from right-hand
  84 +    if( buf[i] == '0' )
  85 +    {
  86 +      buf[i] = '\0';
  87 +      continue;
  88      }
  89 +
  90 +    // Remove decimal dot without decimal digits
  91 +    if( buf[i] == '.' )
  92 +      buf[i] = '\0';
  93 +
  94 +    break;
  95    }
  96 +
  97 +
  98 +  putCString(buf);
  99    return *this;
 100  }
 101