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-rw-r--r--src/filesys.cpp267
1 files changed, 260 insertions, 7 deletions
diff --git a/src/filesys.cpp b/src/filesys.cpp
index 256c8f16a..21ff199a8 100644
--- a/src/filesys.cpp
+++ b/src/filesys.cpp
@@ -20,7 +20,9 @@ with this program; if not, write to the Free Software Foundation, Inc.,
#include "filesys.h"
#include "strfnd.h"
#include <iostream>
+#include <stdio.h>
#include <string.h>
+#include <errno.h>
#include "log.h"
namespace fs
@@ -30,11 +32,9 @@ namespace fs
#define _WIN32_WINNT 0x0501
#include <windows.h>
-#include <stdio.h>
#include <malloc.h>
#include <tchar.h>
#include <wchar.h>
-#include <stdio.h>
#define BUFSIZE MAX_PATH
@@ -145,6 +145,11 @@ bool IsDir(std::string path)
(attr & FILE_ATTRIBUTE_DIRECTORY));
}
+bool IsDirDelimiter(char c)
+{
+ return c == '/' || c == '\\';
+}
+
bool RecursiveDelete(std::string path)
{
infostream<<"Recursively deleting \""<<path<<"\""<<std::endl;
@@ -207,11 +212,26 @@ bool DeleteSingleFileOrEmptyDirectory(std::string path)
}
}
+std::string TempPath()
+{
+ DWORD bufsize = GetTempPath(0, "");
+ if(bufsize == 0){
+ errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
+ return "";
+ }
+ std::vector<char> buf(bufsize);
+ DWORD len = GetTempPath(bufsize, &buf[0]);
+ if(len == 0 || len > bufsize){
+ errorstream<<"GetTempPath failed, error = "<<GetLastError()<<std::endl;
+ return "";
+ }
+ return std::string(buf.begin(), buf.begin() + len);
+}
+
#else // POSIX
#include <sys/types.h>
#include <dirent.h>
-#include <errno.h>
#include <sys/stat.h>
#include <sys/wait.h>
#include <unistd.h>
@@ -301,6 +321,11 @@ bool IsDir(std::string path)
return ((statbuf.st_mode & S_IFDIR) == S_IFDIR);
}
+bool IsDirDelimiter(char c)
+{
+ return c == '/';
+}
+
bool RecursiveDelete(std::string path)
{
/*
@@ -364,6 +389,20 @@ bool DeleteSingleFileOrEmptyDirectory(std::string path)
}
}
+std::string TempPath()
+{
+ /*
+ Should the environment variables TMPDIR, TMP and TEMP
+ and the macro P_tmpdir (if defined by stdio.h) be checked
+ before falling back on /tmp?
+
+ Probably not, because this function is intended to be
+ compatible with lua's os.tmpname which under the default
+ configuration hardcodes mkstemp("/tmp/lua_XXXXXX").
+ */
+ return std::string(DIR_DELIM) + "tmp";
+}
+
#endif
void GetRecursiveSubPaths(std::string path, std::vector<std::string> &dst)
@@ -414,16 +453,14 @@ bool RecursiveDeleteContent(std::string path)
bool CreateAllDirs(std::string path)
{
- size_t pos;
std::vector<std::string> tocreate;
std::string basepath = path;
while(!PathExists(basepath))
{
tocreate.push_back(basepath);
- pos = basepath.rfind(DIR_DELIM_C);
- if(pos == std::string::npos)
+ basepath = RemoveLastPathComponent(basepath);
+ if(basepath.empty())
break;
- basepath = basepath.substr(0,pos);
}
for(int i=tocreate.size()-1;i>=0;i--)
if(!CreateDir(tocreate[i]))
@@ -431,5 +468,221 @@ bool CreateAllDirs(std::string path)
return true;
}
+bool CopyFileContents(std::string source, std::string target)
+{
+ FILE *sourcefile = fopen(source.c_str(), "rb");
+ if(sourcefile == NULL){
+ errorstream<<source<<": can't open for reading: "
+ <<strerror(errno)<<std::endl;
+ return false;
+ }
+
+ FILE *targetfile = fopen(target.c_str(), "wb");
+ if(targetfile == NULL){
+ errorstream<<target<<": can't open for writing: "
+ <<strerror(errno)<<std::endl;
+ fclose(sourcefile);
+ return false;
+ }
+
+ size_t total = 0;
+ bool retval = true;
+ bool done = false;
+ char readbuffer[BUFSIZ];
+ while(!done){
+ size_t readbytes = fread(readbuffer, 1,
+ sizeof(readbuffer), sourcefile);
+ total += readbytes;
+ if(ferror(sourcefile)){
+ errorstream<<source<<": IO error: "
+ <<strerror(errno)<<std::endl;
+ retval = false;
+ done = true;
+ }
+ if(readbytes > 0){
+ fwrite(readbuffer, 1, readbytes, targetfile);
+ }
+ if(feof(sourcefile) || ferror(sourcefile)){
+ // flush destination file to catch write errors
+ // (e.g. disk full)
+ fflush(targetfile);
+ done = true;
+ }
+ if(ferror(targetfile)){
+ errorstream<<target<<": IO error: "
+ <<strerror(errno)<<std::endl;
+ retval = false;
+ done = true;
+ }
+ }
+ infostream<<"copied "<<total<<" bytes from "
+ <<source<<" to "<<target<<std::endl;
+ fclose(sourcefile);
+ fclose(targetfile);
+ return retval;
+}
+
+bool CopyDir(std::string source, std::string target)
+{
+ if(PathExists(source)){
+ if(!PathExists(target)){
+ fs::CreateAllDirs(target);
+ }
+ bool retval = true;
+ std::vector<DirListNode> content = fs::GetDirListing(source);
+
+ for(unsigned int i=0; i < content.size(); i++){
+ std::string sourcechild = source + DIR_DELIM + content[i].name;
+ std::string targetchild = target + DIR_DELIM + content[i].name;
+ if(content[i].dir){
+ if(!fs::CopyDir(sourcechild, targetchild)){
+ retval = false;
+ }
+ }
+ else {
+ if(!fs::CopyFileContents(sourcechild, targetchild)){
+ retval = false;
+ }
+ }
+ }
+ return retval;
+ }
+ else {
+ return false;
+ }
+}
+
+bool PathStartsWith(std::string path, std::string prefix)
+{
+ size_t pathsize = path.size();
+ size_t pathpos = 0;
+ size_t prefixsize = prefix.size();
+ size_t prefixpos = 0;
+ for(;;){
+ bool delim1 = pathpos == pathsize
+ || IsDirDelimiter(path[pathpos]);
+ bool delim2 = prefixpos == prefixsize
+ || IsDirDelimiter(prefix[prefixpos]);
+
+ if(delim1 != delim2)
+ return false;
+
+ if(delim1){
+ while(pathpos < pathsize &&
+ IsDirDelimiter(path[pathpos]))
+ ++pathpos;
+ while(prefixpos < prefixsize &&
+ IsDirDelimiter(prefix[prefixpos]))
+ ++prefixpos;
+ if(prefixpos == prefixsize)
+ return true;
+ if(pathpos == pathsize)
+ return false;
+ }
+ else{
+ size_t len = 0;
+ do{
+ char pathchar = path[pathpos+len];
+ char prefixchar = prefix[prefixpos+len];
+ if(FILESYS_CASE_INSENSITIVE){
+ pathchar = tolower(pathchar);
+ prefixchar = tolower(prefixchar);
+ }
+ if(pathchar != prefixchar)
+ return false;
+ ++len;
+ } while(pathpos+len < pathsize
+ && !IsDirDelimiter(path[pathpos+len])
+ && prefixpos+len < prefixsize
+ && !IsDirDelimiter(
+ prefix[prefixsize+len]));
+ pathpos += len;
+ prefixpos += len;
+ }
+ }
+}
+
+std::string RemoveLastPathComponent(std::string path,
+ std::string *removed, int count)
+{
+ if(removed)
+ *removed = "";
+
+ size_t remaining = path.size();
+
+ for(int i = 0; i < count; ++i){
+ // strip a dir delimiter
+ while(remaining != 0 && IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ // strip a path component
+ size_t component_end = remaining;
+ while(remaining != 0 && !IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ size_t component_start = remaining;
+ // strip a dir delimiter
+ while(remaining != 0 && IsDirDelimiter(path[remaining-1]))
+ remaining--;
+ if(removed){
+ std::string component = path.substr(component_start,
+ component_end - component_start);
+ if(i)
+ *removed = component + DIR_DELIM + *removed;
+ else
+ *removed = component;
+ }
+ }
+ return path.substr(0, remaining);
+}
+
+std::string RemoveRelativePathComponents(std::string path)
+{
+ size_t pos = path.size();
+ size_t dotdot_count = 0;
+ while(pos != 0){
+ size_t component_with_delim_end = pos;
+ // skip a dir delimiter
+ while(pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ // strip a path component
+ size_t component_end = pos;
+ while(pos != 0 && !IsDirDelimiter(path[pos-1]))
+ pos--;
+ size_t component_start = pos;
+
+ std::string component = path.substr(component_start,
+ component_end - component_start);
+ bool remove_this_component = false;
+ if(component == "."){
+ remove_this_component = true;
+ }
+ else if(component == ".."){
+ remove_this_component = true;
+ dotdot_count += 1;
+ }
+ else if(dotdot_count != 0){
+ remove_this_component = true;
+ dotdot_count -= 1;
+ }
+
+ if(remove_this_component){
+ while(pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ path = path.substr(0, pos) + DIR_DELIM +
+ path.substr(component_with_delim_end,
+ std::string::npos);
+ pos++;
+ }
+ }
+
+ if(dotdot_count > 0)
+ return "";
+
+ // remove trailing dir delimiters
+ pos = path.size();
+ while(pos != 0 && IsDirDelimiter(path[pos-1]))
+ pos--;
+ return path.substr(0, pos);
+}
+
} // namespace fs
generated by cgit v1.2.3 (git 2.39.1) at 2024-11-08 11:15:19 +0000