external/public-domain/xz/dist/src/common/tuklib_mbstr_fw.c

   1 ///////////////////////////////////////////////////////////////////////////////
   2 //
   3 /// \file       tuklib_mstr_fw.c
   4 /// \brief      Get the field width for printf() e.g. to align table columns
   5 //
   6 //  Author:     Lasse Collin
   7 //
   8 //  This file has been put into the public domain.
   9 //  You can do whatever you want with this file.
  10 //
  11 ///////////////////////////////////////////////////////////////////////////////
  12
  13 #include "tuklib_mbstr.h"
  14
  15
  16 extern int
  17 tuklib_mbstr_fw(const char *str, int columns_min)
  18 {
  19         size_t len;
  20         const size_t width = tuklib_mbstr_width(str, &len);
  21         if (width == (size_t)-1)
  22                 return -1;
  23
  24         if (width > (size_t)columns_min)
  25                 return 0;
  26
  27         if (width < (size_t)columns_min)
  28                 len += (size_t)columns_min - width;
  29
  30         return len;
  31 }