Issue #18527: Upgrade internal copy of zlib to 1.2.8
diff --git a/Modules/zlib/minigzip.c b/Modules/zlib/minigzip.c
index 9825ccc..b3025a4 100644
--- a/Modules/zlib/minigzip.c
+++ b/Modules/zlib/minigzip.c
@@ -1,5 +1,5 @@
/* minigzip.c -- simulate gzip using the zlib compression library
- * Copyright (C) 1995-2006, 2010 Jean-loup Gailly.
+ * Copyright (C) 1995-2006, 2010, 2011 Jean-loup Gailly.
* For conditions of distribution and use, see copyright notice in zlib.h
*/
@@ -40,6 +40,10 @@
# define SET_BINARY_MODE(file)
#endif
+#ifdef _MSC_VER
+# define snprintf _snprintf
+#endif
+
#ifdef VMS
# define unlink delete
# define GZ_SUFFIX "-gz"
@@ -138,6 +142,197 @@
# define local
#endif
+#ifdef Z_SOLO
+/* for Z_SOLO, create simplified gz* functions using deflate and inflate */
+
+#if defined(Z_HAVE_UNISTD_H) || defined(Z_LARGE)
+# include <unistd.h> /* for unlink() */
+#endif
+
+void *myalloc OF((void *, unsigned, unsigned));
+void myfree OF((void *, void *));
+
+void *myalloc(q, n, m)
+ void *q;
+ unsigned n, m;
+{
+ q = Z_NULL;
+ return calloc(n, m);
+}
+
+void myfree(q, p)
+ void *q, *p;
+{
+ q = Z_NULL;
+ free(p);
+}
+
+typedef struct gzFile_s {
+ FILE *file;
+ int write;
+ int err;
+ char *msg;
+ z_stream strm;
+} *gzFile;
+
+gzFile gzopen OF((const char *, const char *));
+gzFile gzdopen OF((int, const char *));
+gzFile gz_open OF((const char *, int, const char *));
+
+gzFile gzopen(path, mode)
+const char *path;
+const char *mode;
+{
+ return gz_open(path, -1, mode);
+}
+
+gzFile gzdopen(fd, mode)
+int fd;
+const char *mode;
+{
+ return gz_open(NULL, fd, mode);
+}
+
+gzFile gz_open(path, fd, mode)
+ const char *path;
+ int fd;
+ const char *mode;
+{
+ gzFile gz;
+ int ret;
+
+ gz = malloc(sizeof(struct gzFile_s));
+ if (gz == NULL)
+ return NULL;
+ gz->write = strchr(mode, 'w') != NULL;
+ gz->strm.zalloc = myalloc;
+ gz->strm.zfree = myfree;
+ gz->strm.opaque = Z_NULL;
+ if (gz->write)
+ ret = deflateInit2(&(gz->strm), -1, 8, 15 + 16, 8, 0);
+ else {
+ gz->strm.next_in = 0;
+ gz->strm.avail_in = Z_NULL;
+ ret = inflateInit2(&(gz->strm), 15 + 16);
+ }
+ if (ret != Z_OK) {
+ free(gz);
+ return NULL;
+ }
+ gz->file = path == NULL ? fdopen(fd, gz->write ? "wb" : "rb") :
+ fopen(path, gz->write ? "wb" : "rb");
+ if (gz->file == NULL) {
+ gz->write ? deflateEnd(&(gz->strm)) : inflateEnd(&(gz->strm));
+ free(gz);
+ return NULL;
+ }
+ gz->err = 0;
+ gz->msg = "";
+ return gz;
+}
+
+int gzwrite OF((gzFile, const void *, unsigned));
+
+int gzwrite(gz, buf, len)
+ gzFile gz;
+ const void *buf;
+ unsigned len;
+{
+ z_stream *strm;
+ unsigned char out[BUFLEN];
+
+ if (gz == NULL || !gz->write)
+ return 0;
+ strm = &(gz->strm);
+ strm->next_in = (void *)buf;
+ strm->avail_in = len;
+ do {
+ strm->next_out = out;
+ strm->avail_out = BUFLEN;
+ (void)deflate(strm, Z_NO_FLUSH);
+ fwrite(out, 1, BUFLEN - strm->avail_out, gz->file);
+ } while (strm->avail_out == 0);
+ return len;
+}
+
+int gzread OF((gzFile, void *, unsigned));
+
+int gzread(gz, buf, len)
+ gzFile gz;
+ void *buf;
+ unsigned len;
+{
+ int ret;
+ unsigned got;
+ unsigned char in[1];
+ z_stream *strm;
+
+ if (gz == NULL || gz->write)
+ return 0;
+ if (gz->err)
+ return 0;
+ strm = &(gz->strm);
+ strm->next_out = (void *)buf;
+ strm->avail_out = len;
+ do {
+ got = fread(in, 1, 1, gz->file);
+ if (got == 0)
+ break;
+ strm->next_in = in;
+ strm->avail_in = 1;
+ ret = inflate(strm, Z_NO_FLUSH);
+ if (ret == Z_DATA_ERROR) {
+ gz->err = Z_DATA_ERROR;
+ gz->msg = strm->msg;
+ return 0;
+ }
+ if (ret == Z_STREAM_END)
+ inflateReset(strm);
+ } while (strm->avail_out);
+ return len - strm->avail_out;
+}
+
+int gzclose OF((gzFile));
+
+int gzclose(gz)
+ gzFile gz;
+{
+ z_stream *strm;
+ unsigned char out[BUFLEN];
+
+ if (gz == NULL)
+ return Z_STREAM_ERROR;
+ strm = &(gz->strm);
+ if (gz->write) {
+ strm->next_in = Z_NULL;
+ strm->avail_in = 0;
+ do {
+ strm->next_out = out;
+ strm->avail_out = BUFLEN;
+ (void)deflate(strm, Z_FINISH);
+ fwrite(out, 1, BUFLEN - strm->avail_out, gz->file);
+ } while (strm->avail_out == 0);
+ deflateEnd(strm);
+ }
+ else
+ inflateEnd(strm);
+ fclose(gz->file);
+ free(gz);
+ return Z_OK;
+}
+
+const char *gzerror OF((gzFile, int *));
+
+const char *gzerror(gz, err)
+ gzFile gz;
+ int *err;
+{
+ *err = gz->err;
+ return gz->msg;
+}
+
+#endif
+
char *prog;
void error OF((const char *msg));
@@ -272,8 +467,12 @@
exit(1);
}
+#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
+ snprintf(outfile, sizeof(outfile), "%s%s", file, GZ_SUFFIX);
+#else
strcpy(outfile, file);
strcat(outfile, GZ_SUFFIX);
+#endif
in = fopen(file, "rb");
if (in == NULL) {
@@ -308,7 +507,11 @@
exit(1);
}
+#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
+ snprintf(buf, sizeof(buf), "%s", file);
+#else
strcpy(buf, file);
+#endif
if (len > SUFFIX_LEN && strcmp(file+len-SUFFIX_LEN, GZ_SUFFIX) == 0) {
infile = file;
@@ -317,7 +520,11 @@
} else {
outfile = file;
infile = buf;
+#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
+ snprintf(buf + len, sizeof(buf) - len, "%s", GZ_SUFFIX);
+#else
strcat(infile, GZ_SUFFIX);
+#endif
}
in = gzopen(infile, "rb");
if (in == NULL) {
@@ -355,7 +562,11 @@
gzFile file;
char *bname, outmode[20];
+#if !defined(NO_snprintf) && !defined(NO_vsnprintf)
+ snprintf(outmode, sizeof(outmode), "%s", "wb6 ");
+#else
strcpy(outmode, "wb6 ");
+#endif
prog = argv[0];
bname = strrchr(argv[0], '/');