From adda07bf3b068640da9eebc7ae8b7bcaa6f088e0 Mon Sep 17 00:00:00 2001
From: Rob Landley <rob@landley.net>
Date: Sun, 5 Aug 2018 12:01:52 -0500
Subject: Make gzip/zcat use lib/deflate.c when not using zlib, and inline
 fix_time().

---
 toys/pending/gzip.c | 64 +++++++++++++++++++++++++++++------------------------
 1 file changed, 35 insertions(+), 29 deletions(-)

(limited to 'toys')

diff --git a/toys/pending/gzip.c b/toys/pending/gzip.c
index f6d797b5..694ef2e8 100644
--- a/toys/pending/gzip.c
+++ b/toys/pending/gzip.c
@@ -14,7 +14,6 @@ USE_ZCAT(NEWTOY(zcat,     "cdfk123456789[-123456789]", TOYFLAG_USR|TOYFLAG_BIN))
 config GZIP
   bool "gzip"
   default y
-  depends on TOYBOX_LIBZ
   help
     usage: gzip [-19cdfk] [FILE...]
 
@@ -31,7 +30,6 @@ config GZIP
 config GUNZIP
   bool "gunzip"
   default y
-  depends on TOYBOX_LIBZ
   help
     usage: gunzip [-cfk] [FILE...]
 
@@ -46,7 +44,6 @@ config GUNZIP
 config ZCAT
   bool "zcat"
   default y
-  depends on TOYBOX_LIBZ
   help
     usage: zcat [FILE...]
 
@@ -59,27 +56,23 @@ config ZCAT
 #define FOR_gzip
 #include "toys.h"
 
-#include <zlib.h>
-
 GLOBALS(
   int level;
 )
 
-static void fix_time(const char *path, struct stat *sb)
-{
-  struct timespec times[] = { sb->st_atim, sb->st_mtim };
-
-  if (utimensat(AT_FDCWD, path, times, 0)) perror_exit("utimensat");
-}
+// Use assembly optimized zlib code?
+#if CFG_TOYBOX_LIBZ
+#include <zlib.h>
 
-static int do_zlib(int in_fd, int out_fd)
+// Read fron in_fd, write to out_fd, decompress if dd else compress
+static int do_deflate(int in_fd, int out_fd, int dd, int level)
 {
-  int len, err = 0, dd = toys.optflags&FLAG_d;
+  int len, err = 0;
   char *b = "r";
   gzFile gz;
 
   if (!dd) {
-    sprintf(b = toybuf, "w%d", TT.level);
+    sprintf(b = toybuf, "w%d", level);
     if (out_fd == 1) out_fd = xdup(out_fd);
   }
   if (!(gz = gzdopen(dd ? in_fd : out_fd, b))) perror_exit("gzdopen");
@@ -101,6 +94,22 @@ static int do_zlib(int in_fd, int out_fd)
   return err;
 }
 
+// Use toybox's builtin lib/deflate.c
+#else
+
+// Read from in_fd, write to out_fd, decompress if dd else compress
+static int do_deflate(int in_fd, int out_fd, int dd, int level)
+{
+  int x;
+
+  if (dd) WOULD_EXIT(x, gunzip_fd(in_fd, out_fd));
+  else WOULD_EXIT(x, gzip_fd(in_fd, out_fd));
+
+  return x;
+}
+
+#endif
+
 static void do_gzip(int in_fd, char *arg)
 {
   struct stat sb;
@@ -110,26 +119,20 @@ static void do_gzip(int in_fd, char *arg)
   // Are we writing to stdout?
   if (!in_fd || (toys.optflags&FLAG_c)) out_fd = 1;
   if (isatty(in_fd)) {
-    if (!(toys.optflags&FLAG_f)) {
-      error_msg("%s:need -f to read TTY"+3*!!in_fd, arg);
-      return;
-    } else out_fd = 1;
+    if (!(toys.optflags&FLAG_f))
+      return error_msg("%s:need -f to read TTY"+3*!!in_fd, arg);
+    else out_fd = 1;
   }
 
   // Are we reading file.gz to write to file?
   if (!out_fd) {
-    if (fstat(in_fd, &sb)) {
-      perror_msg("%s", arg);
-      return;
-    }
+    if (fstat(in_fd, &sb)) return perror_msg("%s", arg);
 
     if (!(toys.optflags&FLAG_d)) out_name = xmprintf("%s%s", arg, ".gz");
     else {
       // "gunzip x.gz" will decompress "x.gz" to "x".
-      if ((len = strlen(arg))<4 || strcmp(arg+len-3, ".gz")) {
-        error_msg("no .gz: %s", arg);
-        return;
-      }
+      if ((len = strlen(arg))<4 || strcmp(arg+len-3, ".gz"))
+        return error_msg("no .gz: %s", arg);
       out_name = xstrdup(arg);
       out_name[len-3] = 0;
     }
@@ -139,12 +142,14 @@ static void do_gzip(int in_fd, char *arg)
     if (out_fd == -1) return;
   }
 
-//  if (CFG_TOYBOX_LIBZ)
-    if (do_zlib(in_fd, out_fd) && out_name) arg = out_name;
+  if (do_deflate(in_fd, out_fd, toys.optflags&FLAG_d, TT.level) && out_name)
+    arg = out_name;
   if (out_fd != 1) close(out_fd);
 
   if (out_name) {
-    fix_time(out_name, &sb);
+    struct timespec times[] = { sb.st_atim, sb.st_mtim };
+
+    if (utimensat(AT_FDCWD, out_name, times, 0)) perror_exit("utimensat");
     if (!(toys.optflags&FLAG_k)) if (unlink(arg)) perror_msg("unlink %s", arg);
     free(out_name);
   }
@@ -152,6 +157,7 @@ static void do_gzip(int in_fd, char *arg)
 
 void gzip_main(void)
 {
+  // This depends on 1-9 being at the end of the option list
   for (TT.level = 0; TT.level<9; TT.level++)
     if ((toys.optflags>>TT.level)&1) break;
   if (!(TT.level = 9-TT.level)) TT.level = 6;
-- 
cgit v1.2.3