release/src/router/libncurses/ncurses/tinfo/getenv_num.c

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  28
  29 /****************************************************************************
  30  *  Author: Thomas E. Dickey <dickey@clark.net> 1998                        *
  31  ****************************************************************************/
  32
  33 /*
  34  *      getenv_num.c -- obtain a number from the environment
  35  */
  36
  37 #include <curses.priv.h>
  38
  39 MODULE_ID("$Id: getenv_num.c,v 1.6 2013/09/28 20:25:08 tom Exp $")
  40
  41 NCURSES_EXPORT(int)
  42 _nc_getenv_num(const char *name)
  43 {
  44     char *dst = 0;
  45     char *src = getenv(name);
  46     long value;
  47
  48     if ((src == 0)
  49         || (value = strtol(src, &dst, 0)) < 0
  50         || (dst == src)
  51         || (*dst != '\0')
  52         || (int) value < value)
  53         value = -1;
  54
  55     return (int) value;
  56 }
  57
  58 NCURSES_EXPORT(void)
  59 _nc_setenv_num(const char *name, int value)
  60 {
  61     if (name != 0 && value >= 0) {
  62         char buffer[128];
  63 #if HAVE_SETENV
  64         _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%d", value);
  65         setenv(name, buffer, 1);
  66 #elif HAVE_PUTENV
  67         char *s;
  68         _nc_SPRINTF(buffer, _nc_SLIMIT(sizeof(buffer)) "%s=%d", name, value);
  69         if ((s = strdup(buffer)) != 0)
  70             putenv(s);
  71 #endif
  72     }
  73 }