OpenSystemsDevelopment / qpdf

Commit d5bfd49cb2c9e62557a06dee3c4e33fc0c091170

Authored by Jay Berkenbilt
1 parent 34a9b835

Remove use of std::abs (fixes #172) 

Different compilers want different choices of headers for std::abs.
It's easier to just to not use it.
Inline Side-by-side
Showing 1 changed file with 8 additions and 4 deletions
libqpdf/Pl_PNGFilter.cc
  View file @d5bfd49
... ... @@ -3,7 +3,11 @@
3 3 #include <stdexcept>
4 4 #include <string.h>
5 5 #include <limits.h>
6   -#include <algorithm>
  6 +
  7 +static int abs_diff(int a, int b)
  8 +{
  9 + return a > b ? a - b : b - a;
  10 +}
7 11  
8 12 Pl_PNGFilter::Pl_PNGFilter(char const* identifier, Pipeline* next,
9 13 action_e action, unsigned int columns,
... ... @@ -218,9 +222,9 @@ int
218 222 Pl_PNGFilter::PaethPredictor(int a, int b, int c)
219 223 {
220 224 int p = a + b - c;
221   - int pa = std::abs(p - a);
222   - int pb = std::abs(p - b);
223   - int pc = std::abs(p - c);
  225 + int pa = abs_diff(p, a);
  226 + int pb = abs_diff(p, b);
  227 + int pc = abs_diff(p, c);
224 228  
225 229 if (pa <= pb && pa <= pc)
226 230 {
... ...