ZipArchive: Update to the 4.6.9 release

1 files changed, 187 insertions, 149 deletions

diff --git a/zip/ZipArchive/zlib/adler32.c b/zip/ZipArchive/zlib/adler32.c
index f201d67..ce13d38 100644
--- a/zip/ZipArchive/zlib/adler32.c
+++ b/zip/ZipArchive/zlib/adler32.c
@@ -1,149 +1,187 @@
-/* adler32.c -- compute the Adler-32 checksum of a data stream

- * Copyright (C) 1995-2004 Mark Adler

- * For conditions of distribution and use, see copyright notice in zlib.h

- */

-

-/* @(#) $Id$ */

-

-#define ZLIB_INTERNAL

-#include "zlib.h"

-

-#define BASE 65521UL    /* largest prime smaller than 65536 */

-#define NMAX 5552

-/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */

-

-#define DO1(buf,i)  {adler += (buf)[i]; sum2 += adler;}

-#define DO2(buf,i)  DO1(buf,i); DO1(buf,i+1);

-#define DO4(buf,i)  DO2(buf,i); DO2(buf,i+2);

-#define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);

-#define DO16(buf)   DO8(buf,0); DO8(buf,8);

-

-/* use NO_DIVIDE if your processor does not do division in hardware */

-#ifdef NO_DIVIDE

-#  define MOD(a) \

-    do { \

-        if (a >= (BASE << 16)) a -= (BASE << 16); \

-        if (a >= (BASE << 15)) a -= (BASE << 15); \

-        if (a >= (BASE << 14)) a -= (BASE << 14); \

-        if (a >= (BASE << 13)) a -= (BASE << 13); \

-        if (a >= (BASE << 12)) a -= (BASE << 12); \

-        if (a >= (BASE << 11)) a -= (BASE << 11); \

-        if (a >= (BASE << 10)) a -= (BASE << 10); \

-        if (a >= (BASE << 9)) a -= (BASE << 9); \

-        if (a >= (BASE << 8)) a -= (BASE << 8); \

-        if (a >= (BASE << 7)) a -= (BASE << 7); \

-        if (a >= (BASE << 6)) a -= (BASE << 6); \

-        if (a >= (BASE << 5)) a -= (BASE << 5); \

-        if (a >= (BASE << 4)) a -= (BASE << 4); \

-        if (a >= (BASE << 3)) a -= (BASE << 3); \

-        if (a >= (BASE << 2)) a -= (BASE << 2); \

-        if (a >= (BASE << 1)) a -= (BASE << 1); \

-        if (a >= BASE) a -= BASE; \

-    } while (0)

-#  define MOD4(a) \

-    do { \

-        if (a >= (BASE << 4)) a -= (BASE << 4); \

-        if (a >= (BASE << 3)) a -= (BASE << 3); \

-        if (a >= (BASE << 2)) a -= (BASE << 2); \

-        if (a >= (BASE << 1)) a -= (BASE << 1); \

-        if (a >= BASE) a -= BASE; \

-    } while (0)

-#else

-#  define MOD(a) a %= BASE

-#  define MOD4(a) a %= BASE

-#endif

-

-/* ========================================================================= */

-uLong ZEXPORT adler32(adler, buf, len)

-    uLong adler;

-    const Bytef *buf;

-    uInt len;

-{

-    unsigned long sum2;

-    unsigned n;

-

-    /* split Adler-32 into component sums */

-    sum2 = (adler >> 16) & 0xffff;

-    adler &= 0xffff;

-

-    /* in case user likes doing a byte at a time, keep it fast */

-    if (len == 1) {

-        adler += buf[0];

-        if (adler >= BASE)

-            adler -= BASE;

-        sum2 += adler;

-        if (sum2 >= BASE)

-            sum2 -= BASE;

-        return adler | (sum2 << 16);

-    }

-

-    /* initial Adler-32 value (deferred check for len == 1 speed) */

-    if (buf == Z_NULL)

-        return 1L;

-

-    /* in case short lengths are provided, keep it somewhat fast */

-    if (len < 16) {

-        while (len--) {

-            adler += *buf++;

-            sum2 += adler;

-        }

-        if (adler >= BASE)

-            adler -= BASE;

-        MOD4(sum2);             /* only added so many BASE's */

-        return adler | (sum2 << 16);

-    }

-

-    /* do length NMAX blocks -- requires just one modulo operation */

-    while (len >= NMAX) {

-        len -= NMAX;

-        n = NMAX / 16;          /* NMAX is divisible by 16 */

-        do {

-            DO16(buf);          /* 16 sums unrolled */

-            buf += 16;

-        } while (--n);

-        MOD(adler);

-        MOD(sum2);

-    }

-

-    /* do remaining bytes (less than NMAX, still just one modulo) */

-    if (len) {                  /* avoid modulos if none remaining */

-        while (len >= 16) {

-            len -= 16;

-            DO16(buf);

-            buf += 16;

-        }

-        while (len--) {

-            adler += *buf++;

-            sum2 += adler;

-        }

-        MOD(adler);

-        MOD(sum2);

-    }

-

-    /* return recombined sums */

-    return adler | (sum2 << 16);

-}

-

-/* ========================================================================= */

-uLong ZEXPORT adler32_combine(adler1, adler2, len2)

-    uLong adler1;

-    uLong adler2;

-    z_off_t len2;

-{

-    unsigned long sum1;

-    unsigned long sum2;

-    unsigned rem;

-

-    /* the derivation of this formula is left as an exercise for the reader */

-    rem = (unsigned)(len2 % BASE);

-    sum1 = adler1 & 0xffff;

-    sum2 = rem * sum1;

-    MOD(sum2);

-    sum1 += (adler2 & 0xffff) + BASE - 1;

-    sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;

-    if (sum1 > BASE) sum1 -= BASE;

-    if (sum1 > BASE) sum1 -= BASE;

-    if (sum2 > (BASE << 1)) sum2 -= (BASE << 1);

-    if (sum2 > BASE) sum2 -= BASE;

-    return sum1 | (sum2 << 16);

-}

+/* adler32.c -- compute the Adler-32 checksum of a data stream
+ * Copyright (C) 1995-2011, 2016 Mark Adler
+ * For conditions of distribution and use, see copyright notice in zlib.h
+ */
+
+/* @(#) $Id$ */
+
+#include "zutil.h"
+
+local uLong adler32_combine_ OF((uLong adler1, uLong adler2, z_off64_t len2));
+
+#define BASE 65521U     /* largest prime smaller than 65536 */
+#define NMAX 5552
+/* NMAX is the largest n such that 255n(n+1)/2 + (n+1)(BASE-1) <= 2^32-1 */
+
+#define DO1(buf,i)  {adler += (buf)[i]; sum2 += adler;}
+#define DO2(buf,i)  DO1(buf,i); DO1(buf,i+1);
+#define DO4(buf,i)  DO2(buf,i); DO2(buf,i+2);
+#define DO8(buf,i)  DO4(buf,i); DO4(buf,i+4);
+#define DO16(buf)   DO8(buf,0); DO8(buf,8);
+
+/* use NO_DIVIDE if your processor does not do division in hardware --
+   try it both ways to see which is faster */
+#ifdef NO_DIVIDE
+/* note that this assumes BASE is 65521, where 65536 % 65521 == 15
+   (thank you to John Reiser for pointing this out) */
+#  define CHOP(a) \
+    do { \
+        unsigned long tmp = a >> 16; \
+        a &= 0xffffUL; \
+        a += (tmp << 4) - tmp; \
+    } while (0)
+#  define MOD28(a) \
+    do { \
+        CHOP(a); \
+        if (a >= BASE) a -= BASE; \
+    } while (0)
+#  define MOD(a) \
+    do { \
+        CHOP(a); \
+        MOD28(a); \
+    } while (0)
+#  define MOD63(a) \
+    do { /* this assumes a is not negative */ \
+        z_off64_t tmp = a >> 32; \
+        a &= 0xffffffffL; \
+        a += (tmp << 8) - (tmp << 5) + tmp; \
+        tmp = a >> 16; \
+        a &= 0xffffL; \
+        a += (tmp << 4) - tmp; \
+        tmp = a >> 16; \
+        a &= 0xffffL; \
+        a += (tmp << 4) - tmp; \
+        if (a >= BASE) a -= BASE; \
+    } while (0)
+#else
+#  define MOD(a) a %= BASE
+#  define MOD28(a) a %= BASE
+#  define MOD63(a) a %= BASE
+#endif
+
+/* ========================================================================= */
+uLong ZEXPORT adler32_z(adler, buf, len)
+    uLong adler;
+    const Bytef *buf;
+    z_size_t len;
+{
+    unsigned long sum2;
+    unsigned n;
+
+    /* split Adler-32 into component sums */
+    sum2 = (adler >> 16) & 0xffff;
+    adler &= 0xffff;
+
+    /* in case user likes doing a byte at a time, keep it fast */
+    if (len == 1) {
+        adler += buf[0];
+        if (adler >= BASE)
+            adler -= BASE;
+        sum2 += adler;
+        if (sum2 >= BASE)
+            sum2 -= BASE;
+        return adler | (sum2 << 16);
+    }
+
+    /* initial Adler-32 value (deferred check for len == 1 speed) */
+    if (buf == Z_NULL)
+        return 1L;
+
+    /* in case short lengths are provided, keep it somewhat fast */
+    if (len < 16) {
+        while (len--) {
+            adler += *buf++;
+            sum2 += adler;
+        }
+        if (adler >= BASE)
+            adler -= BASE;
+        MOD28(sum2);            /* only added so many BASE's */
+        return adler | (sum2 << 16);
+    }
+
+    /* do length NMAX blocks -- requires just one modulo operation */
+    while (len >= NMAX) {
+        len -= NMAX;
+        n = NMAX / 16;          /* NMAX is divisible by 16 */
+        do {
+            DO16(buf);          /* 16 sums unrolled */
+            buf += 16;
+        } while (--n);
+        MOD(adler);
+        MOD(sum2);
+    }
+
+    /* do remaining bytes (less than NMAX, still just one modulo) */
+    if (len) {                  /* avoid modulos if none remaining */
+        while (len >= 16) {
+            len -= 16;
+            DO16(buf);
+            buf += 16;
+        }
+        while (len--) {
+            adler += *buf++;
+            sum2 += adler;
+        }
+        MOD(adler);
+        MOD(sum2);
+    }
+
+    /* return recombined sums */
+    return adler | (sum2 << 16);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT adler32(adler, buf, len)
+    uLong adler;
+    const Bytef *buf;
+    uInt len;
+{
+    return adler32_z(adler, buf, len);
+}
+
+/* ========================================================================= */
+local uLong adler32_combine_(adler1, adler2, len2)
+    uLong adler1;
+    uLong adler2;
+    z_off64_t len2;
+{
+    unsigned long sum1;
+    unsigned long sum2;
+    unsigned rem;
+
+    /* for negative len, return invalid adler32 as a clue for debugging */
+    if (len2 < 0)
+        return 0xffffffffUL;
+
+    /* the derivation of this formula is left as an exercise for the reader */
+    MOD63(len2);                /* assumes len2 >= 0 */
+    rem = (unsigned)len2;
+    sum1 = adler1 & 0xffff;
+    sum2 = rem * sum1;
+    MOD(sum2);
+    sum1 += (adler2 & 0xffff) + BASE - 1;
+    sum2 += ((adler1 >> 16) & 0xffff) + ((adler2 >> 16) & 0xffff) + BASE - rem;
+    if (sum1 >= BASE) sum1 -= BASE;
+    if (sum1 >= BASE) sum1 -= BASE;
+    if (sum2 >= ((unsigned long)BASE << 1)) sum2 -= ((unsigned long)BASE << 1);
+    if (sum2 >= BASE) sum2 -= BASE;
+    return sum1 | (sum2 << 16);
+}
+
+/* ========================================================================= */
+uLong ZEXPORT adler32_combine(adler1, adler2, len2)
+    uLong adler1;
+    uLong adler2;
+    z_off_t len2;
+{
+    return adler32_combine_(adler1, adler2, len2);
+}
+// TD CHANGE: for Code Analysis
+#pragma warning(suppress: 28278)
+uLong ZEXPORT adler32_combine64(adler1, adler2, len2)
+    uLong adler1;
+    uLong adler2;
+    z_off64_t len2;
+{
+    return adler32_combine_(adler1, adler2, len2);
+}