[dev] [sbase] [PATCH] remove unnecessary calls to realloc from tee

[Jakob Kramer]

[PATCH] remove unnecessary calls to realloc from tee

>From 0ec20b994eab3fdd7949fbd8c6503990eb1ff94f Mon Sep 17 00:00:00 2001
From: Jakob Kramer <jakob.kra...@gmx.de>
Date: Tue, 3 Jun 2014 00:15:52 +0200
Subject: [PATCH] remove unnecessary calls to realloc from tee

---
 tee.c |   19 +++++++++----------
 1 file changed, 9 insertions(+), 10 deletions(-)

diff --git a/tee.c b/tee.c
index d78602b..d88e49c 100644
--- a/tee.c
+++ b/tee.c
@@ -16,7 +16,7 @@ main(int argc, char *argv[])
 {
        bool aflag = false;
        char buf[BUFSIZ];
-       int i, nfps = 1;
+       int i, nfps;
        size_t n;
        FILE **fps = NULL;
 
@@ -28,16 +28,15 @@ main(int argc, char *argv[])
                usage();
        } ARGEND;
 
-       if(!(fps = malloc(sizeof *fps)))
-               eprintf("malloc:");
-       fps[nfps-1] = stdout;
+       nfps = argc + 1;
+       if(!(fps = calloc(nfps, sizeof *fps)))
+               eprintf("calloc:");
+
+       for(i = 0; argc > 0; argc--, argv++, i++)
+               if(!(fps[i] = fopen(*argv, aflag ? "a" : "w")))
+                       eprintf("fopen %s:", *argv);
+       fps[i] = stdout;
 
-       for(; argc > 0; argc--, argv++) {
-               if(!(fps = realloc(fps, ++nfps * sizeof *fps)))
-                       eprintf("realloc:");
-               if(!(fps[nfps-1] = fopen(argv[0], aflag ? "a" : "w")))
-                       eprintf("fopen %s:", argv[0]);
-       }
        while((n = fread(buf, 1, sizeof buf, stdin)) > 0) {
                for(i = 0; i < nfps; i++) {
                        if(fwrite(buf, 1, n, fps[i]) != n)
-- 
1.7.10.4