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Merge "Revert "Fix memory/resource handling in imgdiff.cpp, using unique_ptr and vector.""

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This commit is contained in:
Tao Bao
2016-06-01 21:32:15 +00:00
committed by Gerrit Code Review
parent a8850710e5 a0c4011028
commit c96c9881a6
1 changed files with 40 additions and 38 deletions
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78
applypatch/imgdiff.cpp
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@@ -130,10 +130,6 @@
#include <unistd.h>
#include <sys/types.h>
#include <algorithm>
#include <memory>
#include <vector>
#include <bsdiff.h>
#include "zlib.h"
@@ -171,8 +167,16 @@ typedef struct {
char* filename;
} ZipFileEntry;
static bool fileentry_compare(const ZipFileEntry& a, const ZipFileEntry& b) {
return a.data_offset < b.data_offset;
static int fileentry_compare(const void* a, const void* b) {
int ao = ((ZipFileEntry*)a)->data_offset;
int bo = ((ZipFileEntry*)b)->data_offset;
if (ao < bo) {
return -1;
} else if (ao > bo) {
return 1;
} else {
return 0;
}
}
unsigned char* ReadZip(const char* filename,
@@ -185,9 +189,9 @@ unsigned char* ReadZip(const char* filename,
}
size_t sz = static_cast<size_t>(st.st_size);
std::unique_ptr<unsigned char[]> img(new unsigned char[sz]);
unsigned char* img = reinterpret_cast<unsigned char*>(malloc(sz));
FILE* f = fopen(filename, "rb");
if (fread(img.get(), 1, sz, f) != sz) {
if (fread(img, 1, sz, f) != sz) {
printf("failed to read \"%s\" %s\n", filename, strerror(errno));
fclose(f);
return NULL;
@@ -209,13 +213,14 @@ unsigned char* ReadZip(const char* filename,
return NULL;
}
int cdcount = Read2(&img[i+8]);
int cdoffset = Read4(&img[i+16]);
int cdcount = Read2(img+i+8);
int cdoffset = Read4(img+i+16);
std::vector<ZipFileEntry> temp_entries(cdcount);
ZipFileEntry* temp_entries = reinterpret_cast<ZipFileEntry*>(malloc(
cdcount * sizeof(ZipFileEntry)));
int entrycount = 0;
unsigned char* cd = &img[cdoffset];
unsigned char* cd = img+cdoffset;
for (i = 0; i < cdcount; ++i) {
if (!(cd[0] == 0x50 && cd[1] == 0x4b && cd[2] == 0x01 && cd[3] == 0x02)) {
printf("bad central directory entry %d\n", i);
@@ -242,7 +247,7 @@ unsigned char* ReadZip(const char* filename,
continue;
}
unsigned char* lh = &img[hoffset];
unsigned char* lh = img + hoffset;
if (!(lh[0] == 0x50 && lh[1] == 0x4b && lh[2] == 0x03 && lh[3] == 0x04)) {
printf("bad local file header entry %d\n", i);
@@ -263,7 +268,7 @@ unsigned char* ReadZip(const char* filename,
++entrycount;
}
std::sort(temp_entries.begin(), temp_entries.end(), fileentry_compare);
qsort(temp_entries, entrycount, sizeof(ZipFileEntry), fileentry_compare);
#if 0
printf("found %d deflated entries\n", entrycount);
@@ -285,7 +290,7 @@ unsigned char* ReadZip(const char* filename,
curr->type = CHUNK_NORMAL;
curr->start = 0;
curr->len = st.st_size;
curr->data = img.get();
curr->data = img;
curr->filename = NULL;
++curr;
++*num_chunks;
@@ -299,7 +304,7 @@ unsigned char* ReadZip(const char* filename,
curr->type = CHUNK_DEFLATE;
curr->start = pos;
curr->deflate_len = temp_entries[nextentry].deflate_len;
curr->deflate_data = &img[pos];
curr->deflate_data = img + pos;
curr->filename = temp_entries[nextentry].filename;
curr->len = temp_entries[nextentry].uncomp_len;
@@ -343,7 +348,7 @@ unsigned char* ReadZip(const char* filename,
} else {
curr->len = st.st_size - pos;
}
curr->data = &img[pos];
curr->data = img + pos;
curr->filename = NULL;
pos += curr->len;
@@ -351,7 +356,8 @@ unsigned char* ReadZip(const char* filename,
++curr;
}
return img.release();
free(temp_entries);
return img;
}
/*
@@ -372,9 +378,9 @@ unsigned char* ReadImage(const char* filename,
}
size_t sz = static_cast<size_t>(st.st_size);
std::unique_ptr<unsigned char[]> img(new unsigned char[sz+4]);
unsigned char* img = reinterpret_cast<unsigned char*>(malloc(sz + 4));
FILE* f = fopen(filename, "rb");
if (fread(img.get(), 1, sz, f) != sz) {
if (fread(img, 1, sz, f) != sz) {
printf("failed to read \"%s\" %s\n", filename, strerror(errno));
fclose(f);
return NULL;
@@ -384,7 +390,7 @@ unsigned char* ReadImage(const char* filename,
// append 4 zero bytes to the data so we can always search for the
// four-byte string 1f8b0800 starting at any point in the actual
// file data, without special-casing the end of the data.
memset(&img[sz], 0, 4);
memset(img+sz, 0, 4);
size_t pos = 0;
@@ -392,7 +398,7 @@ unsigned char* ReadImage(const char* filename,
*chunks = NULL;
while (pos < sz) {
unsigned char* p = &img[pos];
unsigned char* p = img+pos;
if (sz - pos >= 4 &&
p[0] == 0x1f && p[1] == 0x8b &&
@@ -475,7 +481,7 @@ unsigned char* ReadImage(const char* filename,
curr->type = CHUNK_NORMAL;
curr->start = pos;
curr->len = GZIP_FOOTER_LEN;
curr->data = &img[pos];
curr->data = img+pos;
pos += curr->len;
p += curr->len;
@@ -489,6 +495,7 @@ unsigned char* ReadImage(const char* filename,
if (footer_size != curr[-2].len) {
printf("Error: footer size %zu != decompressed size %zu\n",
footer_size, curr[-2].len);
free(img);
return NULL;
}
} else {
@@ -516,7 +523,7 @@ unsigned char* ReadImage(const char* filename,
}
}
return img.release();
return img;
}
#define BUFFER_SIZE 32768
@@ -638,7 +645,8 @@ unsigned char* MakePatch(ImageChunk* src, ImageChunk* tgt, size_t* size) {
}
size_t sz = static_cast<size_t>(st.st_size);
std::unique_ptr<unsigned char[]> data(new unsigned char[sz]);
// TODO: Memory leak on error return.
unsigned char* data = reinterpret_cast<unsigned char*>(malloc(sz));
if (tgt->type == CHUNK_NORMAL && tgt->len <= sz) {
unlink(ptemp);
@@ -655,9 +663,8 @@ unsigned char* MakePatch(ImageChunk* src, ImageChunk* tgt, size_t* size) {
printf("failed to open patch %s: %s\n", ptemp, strerror(errno));
return NULL;
}
if (fread(data.get(), 1, sz, f) != sz) {
if (fread(data, 1, sz, f) != sz) {
printf("failed to read patch %s: %s\n", ptemp, strerror(errno));
fclose(f);
return NULL;
}
fclose(f);
@@ -675,7 +682,7 @@ unsigned char* MakePatch(ImageChunk* src, ImageChunk* tgt, size_t* size) {
break;
}
return data.release();
return data;
}
/*
@@ -798,7 +805,7 @@ int main(int argc, char** argv) {
}
size_t bonus_size = 0;
std::vector<unsigned char> bonus_data;
unsigned char* bonus_data = NULL;
if (argc >= 3 && strcmp(argv[1], "-b") == 0) {
struct stat st;
if (stat(argv[2], &st) != 0) {
@@ -806,15 +813,14 @@ int main(int argc, char** argv) {
return 1;
}
bonus_size = st.st_size;
bonus_data.resize(bonus_size);
bonus_data = reinterpret_cast<unsigned char*>(malloc(bonus_size));
FILE* f = fopen(argv[2], "rb");
if (f == NULL) {
printf("failed to open bonus file %s: %s\n", argv[2], strerror(errno));
return 1;
}
if (fread(bonus_data.data(), 1, bonus_size, f) != bonus_size) {
if (fread(bonus_data, 1, bonus_size, f) != bonus_size) {
printf("failed to read bonus file %s: %s\n", argv[2], strerror(errno));
fclose(f);
return 1;
}
fclose(f);
@@ -967,11 +973,11 @@ int main(int argc, char** argv) {
patch_data[i] = MakePatch(src_chunks, tgt_chunks+i, patch_size+i);
}
} else {
if (i == 1 && !bonus_data.empty()) {
if (i == 1 && bonus_data) {
printf(" using %zu bytes of bonus data for chunk %d\n", bonus_size, i);
src_chunks[i].data = reinterpret_cast<unsigned char*>(realloc(src_chunks[i].data,
src_chunks[i].len + bonus_size));
memcpy(src_chunks[i].data+src_chunks[i].len, bonus_data.data(), bonus_size);
memcpy(src_chunks[i].data+src_chunks[i].len, bonus_data, bonus_size);
src_chunks[i].len += bonus_size;
}
@@ -1057,10 +1063,6 @@ int main(int argc, char** argv) {
}
fclose(f);
for (i = 0; i < num_tgt_chunks; ++i) {
free(patch_data[i]);
}
free(patch_data);
return 0;
}