Just use fstat in sysMapFile.
Also turn on -Werror and remove a dead function.
Change-Id: I436f0a91c40e36db985190b3b98b0a4527cf0eeb
diff --git a/minzip/Android.mk b/minzip/Android.mk
index 48d26bc..22eabfb 100644
--- a/minzip/Android.mk
+++ b/minzip/Android.mk
@@ -18,6 +18,6 @@
LOCAL_CLANG := true
-LOCAL_CFLAGS += -Wall
+LOCAL_CFLAGS += -Werror -Wall
include $(BUILD_STATIC_LIBRARY)
diff --git a/minzip/SysUtil.c b/minzip/SysUtil.c
index b160c9e..3dd3572 100644
--- a/minzip/SysUtil.c
+++ b/minzip/SysUtil.c
@@ -3,86 +3,46 @@
*
* System utilities.
*/
-#include <stdlib.h>
-#include <stdio.h>
-#include <unistd.h>
-#include <string.h>
-#include <sys/mman.h>
-#include <sys/types.h>
-#include <sys/stat.h>
+#include <assert.h>
+#include <errno.h>
#include <fcntl.h>
#include <limits.h>
-#include <errno.h>
-#include <assert.h>
+#include <stdbool.h>
+#include <stdio.h>
+#include <stdlib.h>
+#include <string.h>
+#include <sys/mman.h>
+#include <sys/stat.h>
+#include <sys/types.h>
+#include <unistd.h>
#define LOG_TAG "sysutil"
#include "Log.h"
#include "SysUtil.h"
-static int getFileStartAndLength(int fd, off_t *start_, size_t *length_)
-{
- off_t start, end;
- size_t length;
-
- assert(start_ != NULL);
- assert(length_ != NULL);
-
- // TODO: isn't start always 0 for the single call site? just use fstat instead?
-
- start = TEMP_FAILURE_RETRY(lseek(fd, 0L, SEEK_CUR));
- end = TEMP_FAILURE_RETRY(lseek(fd, 0L, SEEK_END));
-
- if (TEMP_FAILURE_RETRY(lseek(fd, start, SEEK_SET)) == -1 ||
- start == (off_t) -1 || end == (off_t) -1) {
- LOGE("could not determine length of file\n");
- return -1;
- }
-
- length = end - start;
- if (length == 0) {
- LOGE("file is empty\n");
- return -1;
- }
-
- *start_ = start;
- *length_ = length;
-
- return 0;
-}
-
-/*
- * Map a file (from fd's current offset) into a private, read-only memory
- * segment. The file offset must be a multiple of the page size.
- *
- * On success, returns 0 and fills out "pMap". On failure, returns a nonzero
- * value and does not disturb "pMap".
- */
-static int sysMapFD(int fd, MemMapping* pMap)
-{
- off_t start;
- size_t length;
- void* memPtr;
-
+static bool sysMapFD(int fd, MemMapping* pMap) {
assert(pMap != NULL);
- if (getFileStartAndLength(fd, &start, &length) < 0)
- return -1;
+ struct stat sb;
+ if (fstat(fd, &sb) == -1) {
+ LOGW("fstat(%d) failed: %s\n", fd, strerror(errno));
+ return false;
+ }
- memPtr = mmap(NULL, length, PROT_READ, MAP_PRIVATE, fd, start);
+ void* memPtr = mmap(NULL, sb.st_size, PROT_READ, MAP_PRIVATE, fd, 0);
if (memPtr == MAP_FAILED) {
- LOGW("mmap(%d, R, PRIVATE, %d, %d) failed: %s\n", (int) length,
- fd, (int) start, strerror(errno));
- return -1;
+ LOGW("mmap(%d, R, PRIVATE, %d, 0) failed: %s\n", (int) sb.st_size, fd, strerror(errno));
+ return false;
}
pMap->addr = memPtr;
- pMap->length = length;
+ pMap->length = sb.st_size;
pMap->range_count = 1;
pMap->ranges = malloc(sizeof(MappedRange));
pMap->ranges[0].addr = memPtr;
- pMap->ranges[0].length = length;
+ pMap->ranges[0].length = sb.st_size;
- return 0;
+ return true;
}
static int sysMapBlockFile(FILE* mapf, MemMapping* pMap)
@@ -180,13 +140,13 @@
fclose(mapf);
} else {
// This is a regular file.
- int fd = open(fn, O_RDONLY, 0);
- if (fd < 0) {
+ int fd = open(fn, O_RDONLY);
+ if (fd == -1) {
LOGE("Unable to open '%s': %s\n", fn, strerror(errno));
return -1;
}
- if (sysMapFD(fd, pMap) != 0) {
+ if (!sysMapFD(fd, pMap)) {
LOGE("Map of '%s' failed\n", fn);
close(fd);
return -1;
diff --git a/minzip/Zip.c b/minzip/Zip.c
index a64c833..c1dec74 100644
--- a/minzip/Zip.c
+++ b/minzip/Zip.c
@@ -619,13 +619,6 @@
return ret;
}
-static bool crcProcessFunction(const unsigned char *data, int dataLen,
- void *crc)
-{
- *(unsigned long *)crc = crc32(*(unsigned long *)crc, data, dataLen);
- return true;
-}
-
typedef struct {
char *buf;
int bufLen;