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Merge pull request #765 from lioncash/file
file_util: Remove goto usages from Copy()
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commit
258a5cee84
1 changed files with 14 additions and 24 deletions
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@ -2,6 +2,8 @@
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// Licensed under GPLv2 or any later version
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// Refer to the license.txt file included.
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#include <array>
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#include <memory>
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#include <sstream>
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#include <unordered_map>
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#include "common/assert.h"
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@ -275,14 +277,10 @@ bool Copy(const std::string& srcFilename, const std::string& destFilename) {
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GetLastErrorMsg());
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return false;
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#else
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// buffer size
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#define BSIZE 1024
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char buffer[BSIZE];
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using CFilePointer = std::unique_ptr<FILE, decltype(&std::fclose)>;
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// Open input file
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FILE* input = fopen(srcFilename.c_str(), "rb");
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CFilePointer input{fopen(srcFilename.c_str(), "rb"), std::fclose};
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if (!input) {
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LOG_ERROR(Common_Filesystem, "opening input failed {} --> {}: {}", srcFilename,
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destFilename, GetLastErrorMsg());
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@ -290,44 +288,36 @@ bool Copy(const std::string& srcFilename, const std::string& destFilename) {
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}
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// open output file
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FILE* output = fopen(destFilename.c_str(), "wb");
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CFilePointer output{fopen(destFilename.c_str(), "wb"), std::fclose};
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if (!output) {
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fclose(input);
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LOG_ERROR(Common_Filesystem, "opening output failed {} --> {}: {}", srcFilename,
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destFilename, GetLastErrorMsg());
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return false;
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}
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// copy loop
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while (!feof(input)) {
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std::array<char, 1024> buffer;
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while (!feof(input.get())) {
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// read input
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size_t rnum = fread(buffer, sizeof(char), BSIZE, input);
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if (rnum != BSIZE) {
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if (ferror(input) != 0) {
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size_t rnum = fread(buffer.data(), sizeof(char), buffer.size(), input.get());
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if (rnum != buffer.size()) {
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if (ferror(input.get()) != 0) {
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LOG_ERROR(Common_Filesystem, "failed reading from source, {} --> {}: {}",
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srcFilename, destFilename, GetLastErrorMsg());
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goto bail;
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return false;
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}
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}
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// write output
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size_t wnum = fwrite(buffer, sizeof(char), rnum, output);
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size_t wnum = fwrite(buffer.data(), sizeof(char), rnum, output.get());
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if (wnum != rnum) {
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LOG_ERROR(Common_Filesystem, "failed writing to output, {} --> {}: {}", srcFilename,
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destFilename, GetLastErrorMsg());
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goto bail;
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return false;
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}
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}
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// close files
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fclose(input);
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fclose(output);
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return true;
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bail:
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if (input)
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fclose(input);
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if (output)
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fclose(output);
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return false;
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#endif
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}
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