2.9BSD - /usr/include/macros.h

   1: /*
   2: 	numeric() is useful in while's, if's, etc., but don't use *p++
   3: 	max() and min() depend on the types of the operands
   4: 	abs() is absolute value
   5: */
   6: # define numeric(c)     (c >= '0' && c <= '9')
   7: # define max(a,b)       (a<b ? b : a)
   8: # define min(a,b)       (a>b ? b : a)
   9: # define abs(x)         (x>=0 ? x : -x)
  10: 
  11: # define copy(srce,dest)    cat(dest,srce,0)
  12: # define compare(str1,str2) strcmp(str1,str2)
  13: # define equal(str1,str2)   !strcmp(str1,str2)
  14: # define length(str)        strlen(str)
  15: # define size(str)      (strlen(str) + 1)
  16: 
  17: /*
  18: 	The global variable Statbuf is available for use as a stat(II)
  19: 	structure.  Note that "stat.h" is included here and should
  20: 	not be included elsewhere.
  21: 	Exists(file) returns 0 if the file does not exist;
  22: 	the flags word if it does (the flags word is always non-zero).
  23: */
  24: # include <sys/types.h>
  25: # include <sys/stat.h>
  26: struct stat Statbuf;
  27: # define exists(file)       (stat(file,&Statbuf) < 0 ? 0 : Statbuf.st_mode)
  28: 
  29: /*
  30: 	libS.a interface for xopen() and xcreat()
  31: */
  32: # define xfopen(file,mode)  fdfopen(xopen(file,mode),mode)
  33: # define xfcreat(file,mode) fdfopen(xcreat(file,mode),1)
  34: 
  35: # define remove(file)       xunlink(file)
  36: 
  37: /*
  38: 	SAVE() and RSTR() use local data in nested blocks.
  39: 	Make sure that they nest cleanly.
  40: */
  41: # define SAVE(name,place)   { int place name;
  42: # define RSTR(name,place)   name = place;}
  43: 
  44: /*
  45: 	Use: DEBUG(sum,d) which becomes fprintf(stderr,"sum = %d\n",sum)
  46: */
  47: # define DEBUG(variable,type)   fprintf(stderr,"variable = %type\n",variable)
  48: 
  49: /*
  50: 	Use: SCCSID(%W%) which becomes static char Sccsid "%W%"
  51: */
  52: # define SCCSID(arg)        static char Sccsid[] "arg"
  53: 
  54: /*
  55: 	Use of ERRABORT() will cause libS.a internal
  56: 	errors to cause aborts
  57: */
  58: # define ERRABORT() _error() { abort(); }
  59: 
  60: /*
  61: 	Use of USXALLOC() is required to force all calls to alloc()
  62: 	(e.g., from libS.a) to call xalloc().
  63: */
  64: # define USXALLOC() alloc(n) {return(xalloc(n));} free(n) {xfree(n);} \
  65:         malloc(n) {register p; p=xalloc(n); return(p != -1?p:0);}
  66: 
  67: # define NONBLANK(p)        while (*p==' ' || *p=='\t') p++
  68: 
  69: 
  70: /*
  71: 	A global null string.
  72: */
  73: char    Null[1];
  74: 
  75: /*
  76: 	A global error message string.
  77: */
  78: char    Error[128];

Defined variables

Defined macros