separate source into kernel/ user/ mkfs/

1 files changed, 0 insertions, 107 deletions

diff --git a/grep.c b/grep.c
deleted file mode 100644
index adc4835..0000000
--- a/grep.c
+++ /dev/null
@@ -1,107 +0,0 @@
-// Simple grep.  Only supports ^ . * $ operators.
-
-#include "types.h"
-#include "stat.h"
-#include "user.h"
-
-char buf[1024];
-int match(char*, char*);
-
-void
-grep(char *pattern, int fd)
-{
-  int n, m;
-  char *p, *q;
-
-  m = 0;
-  while((n = read(fd, buf+m, sizeof(buf)-m-1)) > 0){
-    m += n;
-    buf[m] = '\0';
-    p = buf;
-    while((q = strchr(p, '\n')) != 0){
-      *q = 0;
-      if(match(pattern, p)){
-        *q = '\n';
-        write(1, p, q+1 - p);
-      }
-      p = q+1;
-    }
-    if(p == buf)
-      m = 0;
-    if(m > 0){
-      m -= p - buf;
-      memmove(buf, p, m);
-    }
-  }
-}
-
-int
-main(int argc, char *argv[])
-{
-  int fd, i;
-  char *pattern;
-
-  if(argc <= 1){
-    printf(2, "usage: grep pattern [file ...]\n");
-    exit();
-  }
-  pattern = argv[1];
-
-  if(argc <= 2){
-    grep(pattern, 0);
-    exit();
-  }
-
-  for(i = 2; i < argc; i++){
-    if((fd = open(argv[i], 0)) < 0){
-      printf(1, "grep: cannot open %s\n", argv[i]);
-      exit();
-    }
-    grep(pattern, fd);
-    close(fd);
-  }
-  exit();
-}
-
-// Regexp matcher from Kernighan & Pike,
-// The Practice of Programming, Chapter 9.
-
-int matchhere(char*, char*);
-int matchstar(int, char*, char*);
-
-int
-match(char *re, char *text)
-{
-  if(re[0] == '^')
-    return matchhere(re+1, text);
-  do{  // must look at empty string
-    if(matchhere(re, text))
-      return 1;
-  }while(*text++ != '\0');
-  return 0;
-}
-
-// matchhere: search for re at beginning of text
-int matchhere(char *re, char *text)
-{
-  if(re[0] == '\0')
-    return 1;
-  if(re[1] == '*')
-    return matchstar(re[0], re+2, text);
-  if(re[0] == '$' && re[1] == '\0')
-    return *text == '\0';
-  if(*text!='\0' && (re[0]=='.' || re[0]==*text))
-    return matchhere(re+1, text+1);
-  return 0;
-}
-
-// matchstar: search for c*re at beginning of text
-int matchstar(int c, char *re, char *text)
-{
-  do{  // a * matches zero or more instances
-    if(matchhere(re, text))
-      return 1;
-  }while(*text!='\0' && (*text++==c || c=='.'));
-  return 0;
-}
-