From f433be6d9c9ca7010d2c4368030a09a76bb3b98b Mon Sep 17 00:00:00 2001
From: matz <matz@b2dd03c8-39d4-4d8f-98ff-823fe69b080e>
Date: Wed, 6 Oct 2004 15:15:12 +0000
Subject: * io.c (rb_io_s_sysopen): preserve path in the buffer allocated by  
 ALLOCA_N() to prevent modification.  [ruby-dev:24438]

* io.c (rb_io_mode_flags): preserve append mode flag.
  [ruby-dev:24436]

* io.c (rb_io_modenum_mode): do not use external output buffer.

* string.c (rb_str_justify): differ pointer retrieval to prevent
  padding string modification.  [ruby-dev:24434]

* range.c (range_each_func): allow func to terminate loop by
  returning RANGE_EACH_BREAK.

* range.c (member_i): use RANGE_EACH_BREAK. [ruby-talk:114959]

* marshal.c (r_byte): retrieve pointer from string value for each
  time.  [ruby-dev:24404]

* marshal.c (r_bytes0): ditto.

* enum.c (sort_by_i): re-entrance check added.  [ruby-dev:24399]

* io.c (io_read): should freeze all reading buffer.
  [ruby-dev:24400]

* string.c (rb_str_sum): should use bignums when bits is greater
  than or equals to sizeof(long)*CHAR_BITS. [ruby-dev:24395]

* eval.c (specific_eval): defer pointer retrieval to prevent
  unsafe sourcefile string modification.  [ruby-dev:24382]

* eval.c (specific_eval): defer pointer retrieval to prevent
  unsafe sourcefile string modification.  [ruby-dev:24382]

* string.c (rb_str_sum): wrong cast caused wrong result.
  [ruby-dev:24385]

* enum.c (enum_sort_by): hide temporary array from
  ObjectSpace.each_object.  [ruby-dev:24386]

* string.c (rb_str_sum): check was done with false pointer.
  [ruby-dev:24383]


git-svn-id: svn+ssh://ci.ruby-lang.org/ruby/branches/ruby_1_8@7003 b2dd03c8-39d4-4d8f-98ff-823fe69b080e
---
 string.c | 51 +++++++++++++++++++++++++--------------------------
 1 file changed, 25 insertions(+), 26 deletions(-)

(limited to 'string.c')

diff --git a/string.c b/string.c
index 8782e41bc2..d70ea21868 100644
--- a/string.c
+++ b/string.c
@@ -4380,35 +4380,35 @@ rb_str_sum(argc, argv, str)
     ptr = p = RSTRING(str)->ptr;
     len = RSTRING(str)->len;
     pend = p + len;
-    if (bits > sizeof(long)*CHAR_BIT) {
-	VALUE res = INT2FIX(0);
-	VALUE mod;
-
-	mod = rb_funcall(INT2FIX(1), rb_intern("<<"), 1, INT2FIX(bits));
-	mod = rb_funcall(mod, '-', 1, INT2FIX(1));
+    if (bits >= sizeof(long)*CHAR_BIT) {
+	VALUE sum = INT2FIX(0);
 
 	while (p < pend) {
 	    str_mod_check(str, ptr, len);
-	    res = rb_funcall(res, '+', 1, INT2FIX((unsigned int)*p));
+	    sum = rb_funcall(sum, '+', 1, INT2FIX((unsigned char)*p));
 	    p++;
 	}
-	res = rb_funcall(res, '&', 1, mod);
-	return res;
+	if (bits != 0) {
+	    VALUE mod;
+
+	    mod = rb_funcall(INT2FIX(1), rb_intern("<<"), 1, INT2FIX(bits));
+	    mod = rb_funcall(mod, '-', 1, INT2FIX(1));
+	    sum = rb_funcall(sum, '&', 1, mod);
+	}
+	return sum;
     }
     else {
-	unsigned int res = 0;
-	unsigned int mod = (1<<bits)-1;
+	unsigned int sum = 0;
 
-	if (mod == 0) {
-	    mod = -1;
-	}
 	while (p < pend) {
 	    str_mod_check(str, ptr, len);
-	    res += (unsigned int)*p;
+	    sum += (unsigned char)*p;
 	    p++;
 	}
-	res &= mod;
-	return rb_int2inum(res);
+	if (bits != 0) {
+	    sum &= (1<<bits)-1;
+	}
+	return rb_int2inum(sum);
     }
 }
 
@@ -4426,18 +4426,17 @@ rb_str_justify(argc, argv, str, jflag)
     long n;
     VALUE pad;
 
-    if (rb_scan_args(argc, argv, "11", &w, &pad) == 2) {
-        if (!NIL_P(pad)) {
-            StringValue(pad);
-            if (RSTRING(pad)->len > 0) {
-                f = RSTRING(pad)->ptr;
-                flen = RSTRING(pad)->len;
-            }
-        }
-    }
+    rb_scan_args(argc, argv, "11", &w, &pad);
     width = NUM2LONG(w);
     if (width < 0 || RSTRING(str)->len >= width) return rb_str_dup(str);
     res = rb_str_new5(str, 0, width);
+    if (argc == 0) {
+	StringValue(pad);
+	if (RSTRING(pad)->len > 0) {
+	    f = RSTRING(pad)->ptr;
+	    flen = RSTRING(pad)->len;
+        }
+    }
     p = RSTRING(res)->ptr;
     if (jflag != 'l') {
         n = width - RSTRING(str)->len;
-- 
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