Lee Salzman
8f7813d754
git-svn-id: svn://svn.code.sf.net/p/actiongame/code/trunk/ac@4783 e016b1c5-ed68-44aa-a2f7-31cac88cffde
756 lines
19 KiB
C++
756 lines
19 KiB
C++
#include "cube.h"
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///////////////////////// file system ///////////////////////
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#ifndef WIN32
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#include <unistd.h>
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#include <sys/stat.h>
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#include <sys/types.h>
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#include <dirent.h>
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#endif
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string homedir = "";
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vector<char *> packagedirs;
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char *makerelpath(const char *dir, const char *file, const char *prefix, const char *cmd)
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{
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static string tmp;
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if(prefix) copystring(tmp, prefix);
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else tmp[0] = '\0';
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if(file[0]=='<')
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{
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const char *end = strrchr(file, '>');
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if(end)
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{
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size_t len = strlen(tmp);
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copystring(&tmp[len], file, min(sizeof(tmp)-len, size_t(end+2-file)));
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file = end+1;
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}
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}
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if(cmd) concatstring(tmp, cmd);
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defformatstring(pname)("%s/%s", dir, file);
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concatstring(tmp, pname);
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return tmp;
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}
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char *path(char *s)
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{
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for(char *curpart = s;;)
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{
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char *endpart = strchr(curpart, '&');
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if(endpart) *endpart = '\0';
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if(curpart[0]=='<')
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{
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char *file = strrchr(curpart, '>');
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if(!file) return s;
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curpart = file+1;
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}
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for(char *t = curpart; (t = strpbrk(t, "/\\")); *t++ = PATHDIV);
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for(char *prevdir = NULL, *curdir = s;;)
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{
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prevdir = curdir[0]==PATHDIV ? curdir+1 : curdir;
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curdir = strchr(prevdir, PATHDIV);
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if(!curdir) break;
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if(prevdir+1==curdir && prevdir[0]=='.')
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{
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memmove(prevdir, curdir+1, strlen(curdir+1)+1);
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curdir = prevdir;
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}
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else if(curdir[1]=='.' && curdir[2]=='.' && curdir[3]==PATHDIV)
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{
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if(prevdir+2==curdir && prevdir[0]=='.' && prevdir[1]=='.') continue;
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memmove(prevdir, curdir+4, strlen(curdir+4)+1);
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curdir = prevdir;
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}
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}
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if(endpart)
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{
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*endpart = '&';
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curpart = endpart+1;
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}
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else break;
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}
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return s;
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}
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char *path(const char *s, bool copy)
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{
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static string tmp;
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copystring(tmp, s);
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path(tmp);
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return tmp;
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}
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const char *parentdir(const char *directory)
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{
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const char *p = directory + strlen(directory);
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while(p > directory && *p != '/' && *p != '\\') p--;
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static string parent;
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size_t len = p-directory+1;
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copystring(parent, directory, len);
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return parent;
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}
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const char *behindpath(const char *s)
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{
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const char *t = s;
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for( ; (s = strpbrk(s, "/\\")); t = ++s);
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return t;
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}
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bool fileexists(const char *path, const char *mode)
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{
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bool exists = true;
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if(mode[0]=='w' || mode[0]=='a') path = parentdir(path);
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#ifdef WIN32
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if(GetFileAttributes(path) == INVALID_FILE_ATTRIBUTES) exists = false;
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#else
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if(access(path, R_OK | (mode[0]=='w' || mode[0]=='a' ? W_OK : 0)) == -1) exists = false;
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#endif
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return exists;
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}
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bool createdir(const char *path)
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{
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size_t len = strlen(path);
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if(path[len-1]==PATHDIV)
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{
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static string strip;
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path = copystring(strip, path, len);
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}
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#ifdef WIN32
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return CreateDirectory(path, NULL)!=0;
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#else
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return mkdir(path, 0777)==0;
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#endif
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}
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size_t fixpackagedir(char *dir)
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{
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path(dir);
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size_t len = strlen(dir);
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if(len > 0 && dir[len-1] != PATHDIV)
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{
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dir[len] = PATHDIV;
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dir[len+1] = '\0';
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}
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return len;
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}
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#ifdef WIN32
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char *getregszvalue(HKEY root, const char *keystr, const char *query)
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{
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HKEY key;
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if(RegOpenKeyEx(HKEY_CURRENT_USER, keystr, 0, KEY_READ, &key)==ERROR_SUCCESS)
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{
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DWORD type = 0, len = 0;
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if(RegQueryValueEx(key, query, 0, &type, 0, &len)==ERROR_SUCCESS && type==REG_SZ)
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{
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char *val = new char[len];
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long result = RegQueryValueEx(key, query, 0, &type, (uchar *)val, &len);
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if(result==ERROR_SUCCESS)
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{
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RegCloseKey(key);
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val[len-1] = '\0';
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return val;
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}
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delete[] val;
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}
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RegCloseKey(key);
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}
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return NULL;
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}
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#endif
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void sethomedir(const char *dir)
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{
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string tmpdir;
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copystring(tmpdir, dir);
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#ifdef WIN32
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const char substitute[] = "?MYDOCUMENTS?";
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if(!strncmp(dir, substitute, strlen(substitute)))
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{
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const char *regpath = "Software\\Microsoft\\Windows\\CurrentVersion\\Explorer\\Shell Folders";
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char *mydocuments = getregszvalue(HKEY_CURRENT_USER, regpath, "Personal");
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if(mydocuments)
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{
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formatstring(tmpdir)("%s%s", mydocuments, dir+strlen(substitute));
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delete[] mydocuments;
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}
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else
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{
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printf("failed to retrieve 'Personal' path from '%s'\n", regpath);
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}
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}
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#endif
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#ifndef STANDALONE
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clientlogf("Using home directory: %s", tmpdir);
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#endif
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if(fixpackagedir(tmpdir) > 0)
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{
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copystring(homedir, tmpdir);
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createdir(homedir);
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}
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}
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void addpackagedir(const char *dir)
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{
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#ifndef STANDALONE
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clientlogf("Adding package directory: %s", dir);
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#endif
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string pdir;
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copystring(pdir, dir);
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if(fixpackagedir(pdir) > 0) packagedirs.add(newstring(pdir));
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}
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const char *findfile(const char *filename, const char *mode)
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{
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static string s;
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if(homedir[0])
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{
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formatstring(s)("%s%s", homedir, filename);
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if(fileexists(s, mode)) return s;
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if(mode[0]=='w' || mode[0]=='a')
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{
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string dirs;
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copystring(dirs, s);
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char *dir = strchr(dirs[0]==PATHDIV ? dirs+1 : dirs, PATHDIV);
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while(dir)
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{
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*dir = '\0';
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if(!fileexists(dirs, "r") && !createdir(dirs)) return s;
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*dir = PATHDIV;
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dir = strchr(dir+1, PATHDIV);
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}
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return s;
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}
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}
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if(mode[0]=='w' || mode[0]=='a') return filename;
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loopv(packagedirs)
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{
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formatstring(s)("%s%s", packagedirs[i], filename);
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if(fileexists(s, mode)) return s;
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}
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return filename;
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}
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bool listdir(const char *dir, const char *ext, vector<char *> &files)
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{
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int extsize = ext ? (int)strlen(ext)+1 : 0;
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#if defined(WIN32)
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defformatstring(pathname)("%s\\*.%s", dir, ext ? ext : "*");
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WIN32_FIND_DATA FindFileData;
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HANDLE Find = FindFirstFile(path(pathname), &FindFileData);
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if(Find != INVALID_HANDLE_VALUE)
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{
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do {
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files.add(newstring(FindFileData.cFileName, (int)strlen(FindFileData.cFileName) - extsize));
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} while(FindNextFile(Find, &FindFileData));
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return true;
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}
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#else
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string pathname;
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copystring(pathname, dir);
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DIR *d = opendir(path(pathname));
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if(d)
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{
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struct dirent *de;
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while((de = readdir(d)) != NULL)
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{
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if(!ext) files.add(newstring(de->d_name));
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else
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{
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int namelength = (int)strlen(de->d_name) - extsize;
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if(namelength > 0 && de->d_name[namelength] == '.' && strncmp(de->d_name+namelength+1, ext, extsize-1)==0)
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files.add(newstring(de->d_name, namelength));
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}
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}
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closedir(d);
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return true;
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}
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#endif
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else return false;
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}
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int listfiles(const char *dir, const char *ext, vector<char *> &files)
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{
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int dirs = 0;
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if(listdir(dir, ext, files)) dirs++;
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string s;
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if(homedir[0])
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{
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formatstring(s)("%s%s", homedir, dir);
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if(listdir(s, ext, files)) dirs++;
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}
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loopv(packagedirs)
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{
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formatstring(s)("%s%s", packagedirs[i], dir);
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if(listdir(s, ext, files)) dirs++;
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}
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#ifndef STANDALONE
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dirs += listzipfiles(dir, ext, files);
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#endif
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return dirs;
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}
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bool delfile(const char *path)
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{
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return !remove(path);
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}
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#ifndef STANDALONE
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static int rwopsseek(SDL_RWops *rw, int offset, int whence)
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{
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stream *f = (stream *)rw->hidden.unknown.data1;
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if((!offset && whence==SEEK_CUR) || f->seek(offset, whence)) return f->tell();
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return -1;
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}
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static int rwopsread(SDL_RWops *rw, void *buf, int size, int nmemb)
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{
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stream *f = (stream *)rw->hidden.unknown.data1;
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return f->read(buf, size*nmemb)/size;
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}
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static int rwopswrite(SDL_RWops *rw, const void *buf, int size, int nmemb)
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{
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stream *f = (stream *)rw->hidden.unknown.data1;
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return f->write(buf, size*nmemb)/size;
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}
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static int rwopsclose(SDL_RWops *rw)
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{
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return 0;
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}
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SDL_RWops *stream::rwops()
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{
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SDL_RWops *rw = SDL_AllocRW();
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if(!rw) return NULL;
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rw->hidden.unknown.data1 = this;
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rw->seek = rwopsseek;
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rw->read = rwopsread;
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rw->write = rwopswrite;
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rw->close = rwopsclose;
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return rw;
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}
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#endif
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long stream::size()
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{
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long pos = tell(), endpos;
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if(pos < 0 || !seek(0, SEEK_END)) return -1;
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endpos = tell();
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return pos == endpos || seek(pos, SEEK_SET) ? endpos : -1;
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}
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bool stream::getline(char *str, int len)
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{
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loopi(len-1)
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{
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if(read(&str[i], 1) != 1) { str[i] = '\0'; return i > 0; }
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else if(str[i] == '\n') { str[i+1] = '\0'; return true; }
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}
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if(len > 0) str[len-1] = '\0';
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return true;
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}
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struct filestream : stream
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{
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FILE *file;
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filestream() : file(NULL) {}
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~filestream() { close(); }
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bool open(const char *name, const char *mode)
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{
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if(file) return false;
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file = fopen(name, mode);
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return file!=NULL;
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}
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bool opentemp(const char *name, const char *mode)
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{
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if(file) return false;
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#ifdef WIN32
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file = fopen(name, mode);
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#else
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file = tmpfile();
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#endif
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return file!=NULL;
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}
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void close()
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{
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if(file) { fclose(file); file = NULL; }
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}
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bool end() { return feof(file)!=0; }
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long tell() { return ftell(file); }
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bool seek(long offset, int whence) { return fseek(file, offset, whence) >= 0; }
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int read(void *buf, int len) { return (int)fread(buf, 1, len, file); }
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int write(const void *buf, int len) { return (int)fwrite(buf, 1, len, file); }
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int getchar() { return fgetc(file); }
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bool putchar(int c) { return fputc(c, file)!=EOF; }
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bool getline(char *str, int len) { return fgets(str, len, file)!=NULL; }
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bool putstring(const char *str) { return fputs(str, file)!=EOF; }
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int printf(const char *fmt, ...)
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{
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va_list v;
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va_start(v, fmt);
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int result = vfprintf(file, fmt, v);
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va_end(v);
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return result;
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}
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};
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#ifndef STANDALONE
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VAR(dbggz, 0, 0, 1);
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#endif
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struct gzstream : stream
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{
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enum
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{
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MAGIC1 = 0x1F,
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MAGIC2 = 0x8B,
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BUFSIZE = 16384,
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OS_UNIX = 0x03
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};
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enum
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{
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F_ASCII = 0x01,
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F_CRC = 0x02,
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F_EXTRA = 0x04,
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F_NAME = 0x08,
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F_COMMENT = 0x10,
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F_RESERVED = 0xE0
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};
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stream *file;
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z_stream zfile;
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uchar *buf;
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bool reading, writing, autoclose;
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uint crc;
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int headersize;
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gzstream() : file(NULL), buf(NULL), reading(false), writing(false), autoclose(false), crc(0), headersize(0)
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{
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zfile.zalloc = NULL;
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zfile.zfree = NULL;
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zfile.opaque = NULL;
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zfile.next_in = zfile.next_out = NULL;
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zfile.avail_in = zfile.avail_out = 0;
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}
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~gzstream()
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{
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close();
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}
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void writeheader()
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{
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uchar header[] = { MAGIC1, MAGIC2, Z_DEFLATED, 0, 0, 0, 0, 0, 0, OS_UNIX };
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file->write(header, sizeof(header));
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}
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void readbuf(int size = BUFSIZE)
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{
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if(!zfile.avail_in) zfile.next_in = (Bytef *)buf;
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size = min(size, int(&buf[BUFSIZE] - &zfile.next_in[zfile.avail_in]));
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int n = file->read(zfile.next_in + zfile.avail_in, size);
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if(n > 0) zfile.avail_in += n;
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}
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int readbyte(int size = BUFSIZE)
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{
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if(!zfile.avail_in) readbuf(size);
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if(!zfile.avail_in) return 0;
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zfile.avail_in--;
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return *(uchar *)zfile.next_in++;
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}
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void skipbytes(int n)
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{
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while(n > 0 && zfile.avail_in > 0)
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{
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int skipped = min(n, (int)zfile.avail_in);
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zfile.avail_in -= skipped;
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zfile.next_in += skipped;
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n -= skipped;
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}
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if(n <= 0) return;
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file->seek(n, SEEK_CUR);
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}
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bool checkheader()
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{
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readbuf(10);
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if(readbyte() != MAGIC1 || readbyte() != MAGIC2 || readbyte() != Z_DEFLATED) return false;
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int flags = readbyte();
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if(flags & F_RESERVED) return false;
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skipbytes(6);
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if(flags & F_EXTRA)
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{
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int len = readbyte(512);
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len |= readbyte(512)<<8;
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skipbytes(len);
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}
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if(flags & F_NAME) while(readbyte(512));
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if(flags & F_COMMENT) while(readbyte(512));
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if(flags & F_CRC) skipbytes(2);
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headersize = file->tell() - zfile.avail_in;
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return zfile.avail_in > 0 || !file->end();
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}
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bool open(stream *f, const char *mode, bool needclose, int level)
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{
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if(file) return false;
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for(; *mode; mode++)
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{
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if(*mode=='r') { reading = true; break; }
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else if(*mode=='w') { writing = true; break; }
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}
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if(reading)
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{
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if(inflateInit2(&zfile, -MAX_WBITS) != Z_OK) reading = false;
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}
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else if(writing && deflateInit2(&zfile, level, Z_DEFLATED, -MAX_WBITS, min(MAX_MEM_LEVEL, 8), Z_DEFAULT_STRATEGY) != Z_OK) writing = false;
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if(!reading && !writing) return false;
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autoclose = needclose;
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file = f;
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crc = crc32(0, NULL, 0);
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|
buf = new uchar[BUFSIZE];
|
|
|
|
if(reading)
|
|
{
|
|
if(!checkheader()) { stopreading(); return false; }
|
|
}
|
|
else if(writing) writeheader();
|
|
return true;
|
|
}
|
|
|
|
uint getcrc() { return crc; }
|
|
|
|
void finishreading()
|
|
{
|
|
if(!reading) return;
|
|
#ifndef STANDALONE
|
|
if(dbggz)
|
|
{
|
|
uint checkcrc = 0, checksize = 0;
|
|
loopi(4) checkcrc |= uint(readbyte()) << (i*8);
|
|
loopi(4) checksize |= uint(readbyte()) << (i*8);
|
|
if(checkcrc != crc)
|
|
conoutf("gzip crc check failed: read %X, calculated %X", checkcrc, crc);
|
|
if(checksize != zfile.total_out)
|
|
conoutf("gzip size check failed: read %d, calculated %d", checksize, zfile.total_out);
|
|
}
|
|
#endif
|
|
}
|
|
|
|
void stopreading()
|
|
{
|
|
if(!reading) return;
|
|
inflateEnd(&zfile);
|
|
reading = false;
|
|
}
|
|
|
|
void finishwriting()
|
|
{
|
|
if(!writing) return;
|
|
for(;;)
|
|
{
|
|
int err = zfile.avail_out > 0 ? deflate(&zfile, Z_FINISH) : Z_OK;
|
|
if(err != Z_OK && err != Z_STREAM_END) break;
|
|
flush();
|
|
if(err == Z_STREAM_END) break;
|
|
}
|
|
uchar trailer[8] =
|
|
{
|
|
crc&0xFF, (crc>>8)&0xFF, (crc>>16)&0xFF, (crc>>24)&0xFF,
|
|
zfile.total_in&0xFF, (zfile.total_in>>8)&0xFF, (zfile.total_in>>16)&0xFF, (zfile.total_in>>24)&0xFF
|
|
};
|
|
file->write(trailer, sizeof(trailer));
|
|
}
|
|
|
|
void stopwriting()
|
|
{
|
|
if(!writing) return;
|
|
deflateEnd(&zfile);
|
|
writing = false;
|
|
}
|
|
|
|
void close()
|
|
{
|
|
if(reading) finishreading();
|
|
stopreading();
|
|
if(writing) finishwriting();
|
|
stopwriting();
|
|
DELETEA(buf);
|
|
if(autoclose) DELETEP(file);
|
|
}
|
|
|
|
bool end() { return !reading && !writing; }
|
|
long tell() { return reading ? zfile.total_out : (writing ? zfile.total_in : -1); }
|
|
|
|
bool seek(long offset, int whence)
|
|
{
|
|
if(writing || !reading || whence == SEEK_END) return false;
|
|
|
|
if(whence == SEEK_CUR) offset += zfile.total_out;
|
|
|
|
if(offset >= (int)zfile.total_out) offset -= zfile.total_out;
|
|
else if(offset < 0 || !file->seek(headersize, SEEK_SET)) return false;
|
|
else
|
|
{
|
|
if(zfile.next_in && zfile.total_in <= uint(zfile.next_in - buf))
|
|
{
|
|
zfile.avail_in += zfile.total_in;
|
|
zfile.next_in -= zfile.total_in;
|
|
}
|
|
else
|
|
{
|
|
zfile.avail_in = 0;
|
|
zfile.next_in = NULL;
|
|
}
|
|
inflateReset(&zfile);
|
|
crc = crc32(0, NULL, 0);
|
|
}
|
|
|
|
uchar skip[512];
|
|
while(offset > 0)
|
|
{
|
|
int skipped = min(offset, (long)sizeof(skip));
|
|
if(read(skip, skipped) != skipped) { stopreading(); return false; }
|
|
offset -= skipped;
|
|
}
|
|
|
|
return true;
|
|
}
|
|
|
|
int read(void *buf, int len)
|
|
{
|
|
if(!reading || !buf || !len) return 0;
|
|
zfile.next_out = (Bytef *)buf;
|
|
zfile.avail_out = len;
|
|
while(zfile.avail_out > 0)
|
|
{
|
|
if(!zfile.avail_in)
|
|
{
|
|
readbuf(BUFSIZE);
|
|
if(!zfile.avail_in) { stopreading(); break; }
|
|
}
|
|
int err = inflate(&zfile, Z_NO_FLUSH);
|
|
if(err == Z_STREAM_END) { crc = crc32(crc, (Bytef *)buf, len - zfile.avail_out); finishreading(); stopreading(); return len - zfile.avail_out; }
|
|
else if(err != Z_OK) { stopreading(); break; }
|
|
}
|
|
crc = crc32(crc, (Bytef *)buf, len - zfile.avail_out);
|
|
return len - zfile.avail_out;
|
|
}
|
|
|
|
bool flush()
|
|
{
|
|
if(zfile.next_out && zfile.avail_out < BUFSIZE)
|
|
{
|
|
if(file->write(buf, BUFSIZE - zfile.avail_out) != int(BUFSIZE - zfile.avail_out))
|
|
return false;
|
|
}
|
|
zfile.next_out = buf;
|
|
zfile.avail_out = BUFSIZE;
|
|
return true;
|
|
}
|
|
|
|
int write(const void *buf, int len)
|
|
{
|
|
if(!writing || !buf || !len) return 0;
|
|
zfile.next_in = (Bytef *)buf;
|
|
zfile.avail_in = len;
|
|
while(zfile.avail_in > 0)
|
|
{
|
|
if(!zfile.avail_out && !flush()) { stopwriting(); break; }
|
|
int err = deflate(&zfile, Z_NO_FLUSH);
|
|
if(err != Z_OK) { stopwriting(); break; }
|
|
}
|
|
crc = crc32(crc, (Bytef *)buf, len - zfile.avail_in);
|
|
return len - zfile.avail_in;
|
|
}
|
|
};
|
|
|
|
|
|
stream *openrawfile(const char *filename, const char *mode)
|
|
{
|
|
const char *found = findfile(filename, mode);
|
|
#ifndef STANDALONE
|
|
if(mode && (mode[0]=='w' || mode[0]=='a')) conoutf("writing to file: %s", found);
|
|
#endif
|
|
if(!found) return NULL;
|
|
filestream *file = new filestream;
|
|
if(!file->open(found, mode)) { delete file; return NULL; }
|
|
return file;
|
|
}
|
|
|
|
stream *openfile(const char *filename, const char *mode)
|
|
{
|
|
#ifndef STANDALONE
|
|
stream *s = openzipfile(filename, mode);
|
|
if(s) return s;
|
|
#endif
|
|
return openrawfile(filename, mode);
|
|
}
|
|
|
|
int getfilesize(const char *filename)
|
|
{
|
|
stream *f = openfile(filename, "rb");
|
|
if(!f) return -1;
|
|
int len = f->size();
|
|
delete f;
|
|
return len;
|
|
}
|
|
|
|
stream *opentempfile(const char *name, const char *mode)
|
|
{
|
|
const char *found = findfile(name, mode);
|
|
filestream *file = new filestream;
|
|
if(!file->opentemp(found ? found : name, mode)) { delete file; return NULL; }
|
|
return file;
|
|
}
|
|
|
|
stream *opengzfile(const char *filename, const char *mode, stream *file, int level)
|
|
{
|
|
stream *source = file ? file : openfile(filename, mode);
|
|
if(!source) return NULL;
|
|
gzstream *gz = new gzstream;
|
|
if(!gz->open(source, mode, !file, level)) { if(!file) delete source; return NULL; }
|
|
return gz;
|
|
}
|
|
|
|
char *loadfile(const char *fn, int *size, const char *mode)
|
|
{
|
|
stream *f = openfile(fn, mode ? mode : "rb");
|
|
if(!f) return NULL;
|
|
int len = f->size();
|
|
if(len<=0) { delete f; return NULL; }
|
|
char *buf = new char[len+1];
|
|
if(!buf) { delete f; return NULL; }
|
|
buf[len] = 0;
|
|
int rlen = f->read(buf, len);
|
|
delete f;
|
|
if(len!=rlen && (!mode || strchr(mode, 'b')))
|
|
{
|
|
delete[] buf;
|
|
return NULL;
|
|
}
|
|
if(size!=NULL) *size = len;
|
|
return buf;
|
|
}
|
|
|