1 #define numeric(c) (c>='0' && c<='9') 2 #define max(a,b) (a<b ? b : a) 3 #define min(a,b) (a>b ? b : a) 4 #define abs(x) (x<0 ? -x : x) 5 6 #define copy(src,dest) strcpy(dest,src) 7 #define compare(str1,str2) strcmp(str1,str2) 8 #define equal(str1,str2) !strcmp(str1,str2) 9 #define length(str) strlen(str) 10 #define size(str) (1+strlen(str)) 11 12 #include "sys/types.h" 13 #include "sys/stat.h" 14 struct stat Statbuf; 15 #define exists(file) (stat(file,&Statbuf)<0 ? 0:Statbuf.st_mode) 16 17 #define xfopen(file,mode) fdopen(xopen(file,mode),mode==0?"r":mode==1?"w":"r+w") 18 #define xfcreat(file,mode) fdopen(xcreat(file,mode),"w") 19 #define remove(file) xunlink(file) 20 21 #define SCCSID(arg) static char Sccsid[] = "arg" 22 23 #define USXALLOC() 24 25 #define NONBLANK(p) while (*p==' ' || *p=='\t') p++ 26 27 char Null[1]; 28 char Error[128]; 29