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| version 1.4, 2001/03/10 15:44:31 | version 1.138, 2002/12/15 14:25:22 |
|---|---|
| Line 1 | Line 1 |
| /* | /** @file |
| $Id$ | Parser: commonly functions. |
| */ | |
| #ifdef HAVE_CONFIG_H | Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) |
| # include "pa_config.h" | Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru) |
| #endif | */ |
| #include <fcntl.h> | static const char* IDENT_COMMON_C="$Date$"; |
| #include <sys/types.h> | |
| #include <sys/stat.h> | |
| #include <io.h> | |
| #include <stdio.h> | |
| #include "pa_common.h" | #include "pa_common.h" |
| #include "pa_types.h" | |
| #include "pa_exception.h" | #include "pa_exception.h" |
| #include "pa_globals.h" | |
| #include "pa_hash.h" | |
| #include "pa_vstring.h" | |
| #include "pa_vdate.h" | |
| #ifdef WIN32 | #ifdef WIN32 |
| # include <windows.h> | |
| #else | |
| # define closesocket close | |
| #endif | |
| // some maybe-undefined constants | |
| #ifndef _O_TEXT | |
| # define _O_TEXT 0 | |
| #endif | |
| #ifndef _O_BINARY | |
| # define _O_BINARY 0 | |
| #endif | |
| #ifdef HAVE_FTRUNCATE | |
| # define PA_O_TRUNC 0 | |
| #else | |
| # ifdef _O_TRUNC | |
| # define PA_O_TRUNC _O_TRUNC | |
| # else | |
| # error you must have either ftruncate function or _O_TRUNC bit declared | |
| # endif | |
| #endif | |
| // locking constants | |
| #ifdef HAVE_FLOCK | |
| static int lock_shared_blocking(int fd) { return flock(fd, LOCK_SH); } | |
| static int lock_exclusive_blocking(int fd) { return flock(fd, LOCK_EX); } | |
| static int lock_exclusive_nonblocking(int fd) { return flock(fd, LOCK_EX || LOCK_NB); } | |
| static int unlock(int fd) { return flock(fd, LOCK_UN); } | |
| #else | |
| #ifdef HAVE__LOCKING | |
| #define FLOCK(operation) lseek(fd, 0, SEEK_SET); return _locking(fd, operation, 1) | |
| static int lock_shared_blocking(int fd) { FLOCK(_LK_LOCK); } | |
| static int lock_exclusive_blocking(int fd) { FLOCK(_LK_LOCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(_LK_NBLCK); } | |
| static int unlock(int fd) { FLOCK(_LK_UNLCK); } | |
| #else | |
| #ifdef HAVE_FCNTL | |
| #define FLOCK(cmd, arg) struct flock ls={arg, SEEK_SET}; return fcntl(fd, cmd, &ls) | |
| static int lock_shared_blocking(int fd) { FLOCK(F_SETLKW, F_RDLCK); } | |
| static int lock_exclusive_blocking(int fd) { FLOCK(F_SETLKW, F_WRLCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(F_SETLK, F_RDLCK); } | |
| static int unlock(int fd) { FLOCK(F_SETLK, F_UNLCK); } | |
| #else | |
| #ifdef HAVE_LOCKF | |
| #define FLOCK(fd, operation) lseek(fd, 0, SEEK_SET); return lockf(fd, operation, 1) | |
| static int lock_shared_blocking(int fd) { FLOCK(F_LOCK); } // on intel solaris man doesn't have doc on shared blocking | |
| static int lock_exclusive_blocking(int fd) { FLOCK(F_LOCK); } | |
| static int lock_exclusive_nonblocking(int fd) { FLOCK(F_TLOCK); } | |
| static int unlock(int fd) { FLOCK(F_TLOCK); } | |
| #else | |
| #error unable to find file locking func | |
| #endif | |
| #endif | |
| #endif | |
| #endif | |
| #define DEFAULT_USER_AGENT "parser3" | |
| void fix_line_breaks(char* buf, size_t& size) { | |
| //_asm int 3; | |
| const char* const eob=buf+size; | |
| char* dest=buf; | |
| // fix DOS: \r\n -> \n | |
| // fix Macintosh: \r -> \n | |
| char* bol=buf; | |
| while(char* eol=(char*)memchr(bol, '\r', eob -bol)) { | |
| size_t len=eol-bol; | |
| if(dest!=bol) | |
| memcpy(dest, bol, len); | |
| dest+=len; | |
| *dest++='\n'; | |
| if(&eol[1]<eob && eol[1]=='\n') { // \r, \n = DOS | |
| bol=eol+2; | |
| size--; | |
| } else // \r, not \n = Macintosh | |
| bol=eol+1; | |
| } | |
| // last piece without \r, including terminating 0 | |
| if(dest!=bol) | |
| memcpy(dest, bol, eob-bol); | |
| } | |
| char* file_read_text(Pool& pool, const String& file_spec, | |
| bool fail_on_read_problem, | |
| Hash *params, Hash** out_fields) { | |
| void *result; size_t size; | |
| return file_read(pool, file_spec, result, size, true, params, out_fields, fail_on_read_problem)?(char *)result:0; | |
| } | |
| //http request stuff | |
| /* ************************ http stuff *********************** */ | |
| static bool set_addr(struct sockaddr_in *addr, const char* host, const short port){ | |
| memset(addr, 0, sizeof(*addr)); | |
| addr->sin_family=AF_INET; | |
| addr->sin_port=htons(port); | |
| if(host) { | |
| if(struct hostent *hostIP=gethostbyname(host)) | |
| memcpy(&addr->sin_addr, hostIP->h_addr, hostIP->h_length); | |
| else | |
| return false; | |
| } else | |
| addr->sin_addr.s_addr=INADDR_ANY; | |
| return true; | |
| } | |
| static void http_read_response(String& response, int sock){ | |
| bool check_status=true; | |
| ssize_t EOLat=0; | |
| while(true) { | |
| char *buf=(char *)response.pool().malloc(MAX_STRING); | |
| ssize_t size=recv(sock, buf, MAX_STRING, 0); | |
| if(size<=0) | |
| break; | |
| response.APPEND_TAINTED(buf, size, "remote HTTP server response", 0); | |
| if(check_status && (EOLat=response.pos("\r\n", 2))>=0) { // checking status in first response | |
| check_status=false; | |
| const String& status_line=response.mid(0, (size_t)EOLat); | |
| Array astatus(response.pool()); | |
| size_t pos_after_ref=0; status_line.split(astatus, &pos_after_ref, " ", 1); | |
| const String* status_code=astatus.get_string(1); | |
| if(!status_code || *status_code!="200") | |
| throw Exception("http.status", | |
| status_code, | |
| "invalid HTTP response status"); | |
| } | |
| } | |
| if(check_status) | |
| throw Exception("http.response", | |
| 0, | |
| "bad response from host - no status found (size=%lu)", response.size()); | |
| } | |
| /* ********************** request *************************** */ | |
| int __vsnprintf(char *b, size_t s, const char *f, va_list l) { | #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP) |
| int r=_vsnprintf(b, --s, f, l); | # define WE_CAN_USE_ALARM |
| b[s]=0; | #endif |
| #ifdef WE_CAN_USE_ALARM | |
| static sigjmp_buf timeout_env; | |
| static void timeout_handler(int sig){ | |
| siglongjmp(timeout_env, 1); | |
| } | |
| #endif | |
| static void http_request(String& response, | |
| const String *origin_string, | |
| const char* host, int port, | |
| const char* request, | |
| int timeout){ | |
| if(!host) | |
| throw Exception("http.host", | |
| origin_string, | |
| "zero hostname"); //never | |
| #ifdef WE_CAN_USE_ALARM | |
| signal(SIGALRM, timeout_handler); | |
| #endif | |
| int sock=-1; | |
| try { | |
| #ifdef WE_CAN_USE_ALARM | |
| if(sigsetjmp(timeout_env, 1)) | |
| throw Exception("http.timeout", | |
| origin_string, | |
| "timeout occured while retrieving document"); | |
| else { | |
| alarm(timeout); | |
| #endif | |
| struct sockaddr_in dest; | |
| if(!set_addr(&dest, host, port)) | |
| throw Exception("http.host", | |
| origin_string, | |
| "can not resolve hostname \"%s\"", host); | |
| if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0) | |
| throw Exception("http.connect", | |
| origin_string, | |
| "can not make socket: %s (%d)", strerror(errno), errno); | |
| if(connect(sock, (struct sockaddr *)&dest, sizeof(dest))) | |
| throw Exception("http.connect", | |
| origin_string, | |
| "can not connect to host \"%s\": %s (%d)", host, strerror(errno), errno); | |
| size_t request_size=strlen(request); | |
| if(send(sock, request, request_size, 0)!=(ssize_t)request_size) | |
| throw Exception("http.connect", | |
| origin_string, | |
| "error sending request: %s (%d)", strerror(errno), errno); | |
| http_read_response(response, sock); | |
| if(sock>=0) | |
| closesocket(sock); | |
| #ifdef WE_CAN_USE_ALARM | |
| } | |
| #endif | |
| } catch(...) { | |
| if(sock>=0) | |
| closesocket(sock); | |
| #ifdef WE_CAN_USE_ALARM | |
| alarm(0); | |
| #endif | |
| /*re*/throw; | |
| } | |
| } | |
| #ifndef DOXYGEN | |
| struct Http_pass_header_info { | |
| String* request; | |
| bool user_agent_specified; | |
| }; | |
| #endif | |
| static void http_pass_header(const Hash::Key& key, Hash::Val *value, void *info) | |
| { | |
| Http_pass_header_info& i=*static_cast<Http_pass_header_info *>(info); | |
| Pool& pool=i.request->pool(); | |
| *(i.request)<<key<<": " | |
| << attributed_meaning_to_string(*static_cast<Value *>(value), String::UL_HTTP_HEADER, false) | |
| <<"\n"; | |
| if(key.change_case(pool, String::CC_UPPER)=="USER-AGENT") | |
| i.user_agent_specified=true; | |
| } | |
| static void file_read_http(Pool& pool, const String& file_spec, | |
| void*& data, size_t& data_size, | |
| Hash *options=0, Hash** out_fields=0) { | |
| char host[MAX_STRING]; | |
| const char* uri; | |
| int port; | |
| const char* method="GET"; | |
| int timeout=2; | |
| Value *vheaders=0; | |
| String connect_string(pool); | |
| // not in ^sql{... UL_SQL ...} spirit, but closer to ^file::load one | |
| connect_string.append(file_spec, String::UL_URI); // tainted pieces -> URI pieces | |
| char* connect_string_cstr=connect_string.cstr(String::UL_UNSPECIFIED); | |
| if(strncmp(connect_string_cstr, "http://", 7)!=0) | |
| throw Exception(0, | |
| &connect_string, | |
| "does not start with http://"); //never | |
| connect_string_cstr+=7; | |
| strncpy(host, connect_string_cstr, sizeof(host)-1); host[sizeof(host)-1]=0; | |
| char* host_uri=lsplit(host, '/'); | |
| uri=host_uri?connect_string_cstr+(host_uri-1-host):"/"; | |
| char* port_cstr=lsplit(host, ':'); | |
| char* error_pos=0; | |
| port=port_cstr?strtol(port_cstr, &error_pos, 0):80; | |
| if(options) { | |
| int valid_options=0; | |
| if(Value *vmethod=static_cast<Value *>(options->get(*http_method_name))) { | |
| valid_options++; | |
| method=vmethod->as_string().cstr(); | |
| } | |
| if(Value *vtimeout=static_cast<Value *>(options->get(*http_timeout_name))) { | |
| valid_options++; | |
| timeout=vtimeout->as_int(); | |
| } | |
| if(vheaders=static_cast<Value *>(options->get(*http_headers_name))) { | |
| valid_options++; | |
| } | |
| if(valid_options!=options->size()) | |
| throw Exception("parser.runtime", | |
| 0, | |
| "invalid option passed"); | |
| } | |
| //making request | |
| String request(pool); | |
| request<< method <<" "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n"; | |
| bool user_agent_specified=false; | |
| if(vheaders && !vheaders->is_string()) { // allow empty | |
| if(Hash *headers=vheaders->get_hash(&connect_string)) { | |
| Http_pass_header_info info={&request}; | |
| headers->for_each(http_pass_header, &info); | |
| user_agent_specified=info.user_agent_specified; | |
| } else | |
| throw Exception("parser.runtime", | |
| &connect_string, | |
| "headers param must be hash"); | |
| }; | |
| if(!user_agent_specified) // defaulting | |
| request << "user-agent: " DEFAULT_USER_AGENT "\n"; | |
| request<<"\n"; | |
| //sending request | |
| String response(pool); | |
| http_request(response, | |
| &connect_string, host, port, request.cstr(String::UL_UNSPECIFIED), timeout); | |
| //processing results | |
| int pos=response.pos("\r\n\r\n", 4); | |
| if(pos<1){ | |
| throw Exception("http.response", | |
| &connect_string, | |
| "bad response from host - no headers found"); | |
| } | |
| String header_block=response.mid(0, pos); | |
| String body=response.mid(pos+4, response.size()); | |
| Array aheaders(pool); | |
| Hash& headers=*new(pool) Hash(pool); | |
| size_t pos_after_ref=0; | |
| header_block.split(aheaders, &pos_after_ref, "\r\n", 2); | |
| //processing status code | |
| const String *status_line=aheaders.get_string(0); | |
| if(!status_line){ | |
| throw Exception("http.response", | |
| &connect_string, | |
| "bad response from host - no status line "); | |
| } | |
| //processing headers | |
| for(int i=1;i<aheaders.size();i++) { | |
| if(const String *line=aheaders.get_string(i)) { | |
| pos=line->pos(": ", 2); | |
| if(pos<1) | |
| throw Exception("http.response", | |
| &connect_string, | |
| "bad response from host - bad header \"%s\"", line->cstr()); | |
| headers.put( | |
| line->mid(0, pos).change_case(pool, String::CC_UPPER), | |
| new(pool) VString(line->mid(pos+2, line->size()))); | |
| } else | |
| throw Exception("http.response", | |
| &connect_string, | |
| "bad response from host - bad headers \"%s\"", header_block.cstr()); | |
| } | |
| // output response | |
| data=body.cstr(); data_size=body.size(); | |
| if(out_fields) | |
| *out_fields=&headers; | |
| } | |
| #ifndef DOXYGEN | |
| struct File_read_action_info { | |
| void **data; size_t *data_size; | |
| }; | |
| #endif | |
| static void file_read_action(Pool& pool, | |
| struct stat& finfo, | |
| int f, | |
| const String& file_spec, const char* fname, bool as_text, | |
| void *context) { | |
| File_read_action_info& info=*static_cast<File_read_action_info *>(context); | |
| if(size_t to_read_size=(size_t)finfo.st_size) { | |
| *info.data=pool.malloc(to_read_size+(as_text?1:0), 3); | |
| *info.data_size=(size_t)read(f, *info.data, to_read_size); | |
| if(ssize_t(*info.data_size)<0 || *info.data_size>to_read_size) | |
| throw Exception(0, | |
| &file_spec, | |
| "read failed: actually read %lu bytes count not in [0..%lu] valid range", | |
| *info.data_size, to_read_size); | |
| } else { // empty file | |
| if(as_text) { | |
| *info.data=pool.malloc(1); | |
| *(char*)(*info.data)=0; | |
| } else | |
| *info.data=0; | |
| *info.data_size=0; | |
| return; | |
| } | |
| } | |
| bool file_read(Pool& pool, const String& file_spec, | |
| void*& data, size_t& data_size, | |
| bool as_text, Hash *params, Hash** out_fields, | |
| bool fail_on_read_problem) { | |
| bool result; | |
| if(file_spec.starts_with("http://", 7)) { | |
| // fail on read problem | |
| file_read_http(pool, file_spec, data, data_size, params, out_fields); | |
| result=true; | |
| } else { | |
| File_read_action_info info={&data, &data_size}; | |
| result=file_read_action_under_lock(pool, file_spec, | |
| "read", file_read_action, &info, | |
| as_text, fail_on_read_problem); | |
| } | |
| if(result && as_text) { | |
| // UTF-8 signature: EF BB BF | |
| if(data_size>=3) { | |
| char *in=(char *)data; | |
| if((in[0] == '\xEF') && (in[1] == '\xBB') && | |
| (in[2] == '\xBF')) { | |
| data=in+3; data_size-=3;// skip prefix | |
| } | |
| } | |
| fix_line_breaks((char *)(data), data_size); | |
| // note: after fixing | |
| ((char*&)(data))[data_size]=0; | |
| } | |
| return result; | |
| } | |
| bool file_read_action_under_lock(Pool& pool, const String& file_spec, | |
| const char* action_name, File_read_action action, void *context, | |
| bool as_text, | |
| bool fail_on_read_problem) { | |
| const char* fname=file_spec.cstr(String::UL_FILE_SPEC); | |
| int f; | |
| // first open, next stat: | |
| // directory update of NTFS hard links performed on open. | |
| // ex: | |
| // a.html:^test[] and b.html hardlink to a.html | |
| // user inserts ! before ^test in a.html | |
| // directory entry of b.html in NTFS not updated at once, | |
| // they delay update till open, so we would receive "!^test[" string | |
| // if would do stat, next open. | |
| // later: it seems, even this does not help sometimes | |
| if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) { | |
| try { | |
| if(lock_shared_blocking(f)!=0) | |
| throw Exception("file.lock", | |
| &file_spec, | |
| "shared lock failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname); | |
| struct stat finfo; | |
| if(stat(fname, &finfo)!=0) | |
| throw Exception("file.missing", // hardly possible: we just opened it OK | |
| &file_spec, | |
| "stat failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname); | |
| #ifdef NO_FOREIGN_GROUP_FILES | |
| if(finfo.st_gid/*foreign?*/!=getegid()) | |
| throw Exception("parser.runtime", | |
| &file_spec, | |
| "parser reading files of foreign group disabled [recompile parser without --disable-foreign-group-files configure option], actual filename '%s'", | |
| fname); | |
| #endif | |
| action(pool, finfo, f, file_spec, fname, as_text, context); | |
| } catch(...) { | |
| unlock(f);close(f); | |
| if(fail_on_read_problem) | |
| /*re*/throw; | |
| return false; | |
| } | |
| unlock(f);close(f); | |
| return true; | |
| } else { | |
| if(fail_on_read_problem) | |
| throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, | |
| &file_spec, | |
| "%s failed: %s (%d), actual filename '%s'", | |
| action_name, strerror(errno), errno, fname); | |
| return false; | |
| } | |
| } | |
| static void create_dir_for_file(const String& file_spec) { | |
| size_t pos_after=1; | |
| int pos_before; | |
| while((pos_before=file_spec.pos("/", 1, pos_after))>=0) { | |
| mkdir(file_spec.mid(0, pos_before).cstr(String::UL_FILE_SPEC), 0775); | |
| pos_after=pos_before+1; | |
| } | |
| } | |
| bool file_write_action_under_lock( | |
| const String& file_spec, | |
| const char* action_name, File_write_action action, void *context, | |
| bool as_text, | |
| bool do_append, | |
| bool do_block, | |
| bool fail_on_lock_problem) { | |
| const char* fname=file_spec.cstr(String::UL_FILE_SPEC); | |
| int f; | |
| if(access(fname, W_OK)!=0) // no | |
| create_dir_for_file(file_spec); | |
| if((f=open(fname, | |
| O_CREAT|O_RDWR | |
| |(as_text?_O_TEXT:_O_BINARY) | |
| |(do_append?O_APPEND:PA_O_TRUNC), 0664))>=0) { | |
| if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) { | |
| Exception e("file.lock", | |
| &file_spec, | |
| "shared lock failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname); | |
| close(f); | |
| if(fail_on_lock_problem) | |
| throw e; | |
| return false; | |
| } | |
| try { | |
| action(f, context); | |
| } catch(...) { | |
| #ifdef HAVE_FTRUNCATE | |
| if(!do_append) | |
| ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower | |
| #endif | |
| unlock(f);close(f); | |
| /*re*/throw; | |
| } | |
| #ifdef HAVE_FTRUNCATE | |
| if(!do_append) | |
| ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering] | |
| #endif | |
| unlock(f);close(f); | |
| return true; | |
| } else | |
| throw Exception(errno==EACCES?"file.access":0, | |
| &file_spec, | |
| "%s failed: %s (%d), actual filename '%s'", | |
| action_name, strerror(errno), errno, fname); | |
| // here should be nothing, see rethrow above | |
| } | |
| #ifndef DOXYGEN | |
| struct File_write_action_info { | |
| const void *data; size_t size; | |
| }; | |
| #endif | |
| static void file_write_action(int f, void *context) { | |
| File_write_action_info& info=*static_cast<File_write_action_info *>(context); | |
| if(info.size) { | |
| int written=write(f, info.data, info.size); | |
| if(written<0) | |
| throw Exception(0, | |
| 0, | |
| "write failed: %s (%d)", strerror(errno), errno); | |
| } | |
| } | |
| void file_write( | |
| const String& file_spec, | |
| const void *data, size_t size, | |
| bool as_text, | |
| bool do_append) { | |
| File_write_action_info info={data, size}; | |
| file_write_action_under_lock( | |
| file_spec, | |
| "write", file_write_action, &info, | |
| as_text, | |
| do_append); | |
| } | |
| // throws nothing! [this is required in file_move & file_delete] | |
| static void rmdir(const String& file_spec, size_t pos_after) { | |
| int pos_before; | |
| if((pos_before=file_spec.pos("/", 1, pos_after))>=0) | |
| rmdir(file_spec, pos_before+1); | |
| rmdir(file_spec.mid(0, pos_after-1/* / */).cstr(String::UL_FILE_SPEC)); | |
| } | |
| bool file_delete(const String& file_spec, bool fail_on_read_problem) { | |
| const char* fname=file_spec.cstr(String::UL_FILE_SPEC); | |
| if(unlink(fname)!=0) | |
| if(fail_on_read_problem) | |
| throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, | |
| &file_spec, | |
| "unlink failed: %s (%d), actual filename '%s'", | |
| strerror(errno), errno, fname); | |
| else | |
| return false; | |
| rmdir(file_spec, 1); | |
| return true; | |
| } | |
| void file_move(const String& old_spec, const String& new_spec) { | |
| const char* old_spec_cstr=old_spec.cstr(String::UL_FILE_SPEC); | |
| const char* new_spec_cstr=new_spec.cstr(String::UL_FILE_SPEC); | |
| create_dir_for_file(new_spec); | |
| if(rename(old_spec_cstr, new_spec_cstr)!=0) | |
| throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, | |
| &old_spec, | |
| "rename failed: %s (%d), actual filename '%s' to '%s'", | |
| strerror(errno), errno, old_spec_cstr, new_spec_cstr); | |
| rmdir(old_spec, 1); | |
| } | |
| bool entry_exists(const char* fname, struct stat *afinfo) { | |
| struct stat lfinfo; | |
| bool result=stat(fname, &lfinfo)==0; | |
| if(afinfo) | |
| *afinfo=lfinfo; | |
| return result; | |
| } | |
| bool entry_exists(const String& file_spec) { | |
| const char* fname=file_spec.cstr(String::UL_FILE_SPEC); | |
| return entry_exists(fname, 0); | |
| } | |
| static bool entry_readable(const String& file_spec, bool need_dir) { | |
| char* fname=file_spec.cstr(String::UL_FILE_SPEC); | |
| if(need_dir) { | |
| size_t size=strlen(fname); | |
| while(size) { | |
| char c=fname[size-1]; | |
| if(c=='/' || c=='\\') | |
| fname[--size]=0; | |
| else | |
| break; | |
| } | |
| } | |
| struct stat finfo; | |
| if(access(fname, R_OK)==0 && entry_exists(fname, &finfo)) { | |
| bool is_dir=(finfo.st_mode&S_IFDIR) != 0; | |
| return is_dir==need_dir; | |
| } | |
| return false; | |
| } | |
| bool file_readable(const String& file_spec) { | |
| return entry_readable(file_spec, false); | |
| } | |
| bool dir_readable(const String& file_spec) { | |
| return entry_readable(file_spec, true); | |
| } | |
| String *file_readable(const String& path, const String& name) { | |
| String *result=new(path.pool()) String(path); | |
| *result << "/"; | |
| *result << name; | |
| return file_readable(*result)?result:0; | |
| } | |
| bool file_executable(const String& file_spec) { | |
| return access(file_spec.cstr(String::UL_FILE_SPEC), X_OK)==0; | |
| } | |
| bool file_stat(const String& file_spec, | |
| size_t& rsize, | |
| time_t& ratime, | |
| time_t& rmtime, | |
| time_t& rctime, | |
| bool fail_on_read_problem) { | |
| Pool& pool=file_spec.pool(); | |
| const char* fname=file_spec.cstr(String::UL_FILE_SPEC); | |
| struct stat finfo; | |
| if(stat(fname, &finfo)!=0) | |
| if(fail_on_read_problem) | |
| throw Exception("file.missing", | |
| &file_spec, | |
| "getting file size failed: %s (%d), real filename '%s'", | |
| strerror(errno), errno, fname); | |
| else | |
| return false; | |
| rsize=finfo.st_size; | |
| ratime=finfo.st_atime; | |
| rmtime=finfo.st_mtime; | |
| rctime=finfo.st_ctime; | |
| return true; | |
| } | |
| char* getrow(char* *row_ref, char delim) { | |
| char* result=*row_ref; | |
| if(result) { | |
| *row_ref=strchr(result, delim); | |
| if(*row_ref) | |
| *((*row_ref)++)=0; | |
| else if(!*result) | |
| return 0; | |
| } | |
| return result; | |
| } | |
| char* lsplit(char* string, char delim) { | |
| if(string) { | |
| char* v=strchr(string, delim); | |
| if(v) { | |
| *v=0; | |
| return v+1; | |
| } | |
| } | |
| return 0; | |
| } | |
| char* lsplit(char* *string_ref, char delim) { | |
| char* result=*string_ref; | |
| char* next=lsplit(*string_ref, delim); | |
| *string_ref=next; | |
| return result; | |
| } | |
| char* rsplit(char* string, char delim) { | |
| if(string) { | |
| char* v=strrchr(string, delim); | |
| if(v) { | |
| *v=0; | |
| return v+1; | |
| } | |
| } | |
| return NULL; | |
| } | |
| /// @todo less stupid type detection | |
| char* format(Pool& pool, double value, char* fmt) { | |
| char local_buf[MAX_NUMBER]; | |
| size_t size; | |
| if(fmt) | |
| if(strpbrk(fmt, "diouxX")) | |
| if(strpbrk(fmt, "ouxX")) | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value); | |
| else | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value); | |
| else | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, value); | |
| else | |
| size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value); | |
| char* pool_buf=(char *)pool.malloc(size+1, 4); | |
| memcpy(pool_buf, local_buf, size+1); | |
| return pool_buf; | |
| } | |
| size_t stdout_write(const void *buf, size_t size) { | |
| #ifdef WIN32 | |
| do{ | |
| int chunk_written=fwrite(buf, 1, min(8*0x400, size), stdout); | |
| if(chunk_written<=0) | |
| break; | |
| size-=chunk_written; | |
| buf=((const char*)buf)+chunk_written; | |
| } while(size>0); | |
| return size; | |
| #else | |
| return fwrite(buf, 1, size, stdout); | |
| #endif | |
| } | |
| char* unescape_chars(Pool& pool, const char* cp, int len) { | |
| char* s=(char *)pool.malloc(len + 1, 5); | |
| enum EscapeState { | |
| EscapeRest, | |
| EscapeFirst, | |
| EscapeSecond | |
| } escapeState=EscapeRest; | |
| int escapedValue=0; | |
| int srcPos=0; | |
| int dstPos=0; | |
| while(srcPos < len) { | |
| int ch=cp[srcPos]; | |
| switch(escapeState) { | |
| case EscapeRest: | |
| if(ch=='%') { | |
| escapeState=EscapeFirst; | |
| } else if(ch=='+') { | |
| s[dstPos++]=' '; | |
| } else { | |
| s[dstPos++]=ch; | |
| } | |
| break; | |
| case EscapeFirst: | |
| escapedValue=hex_value[ch] << 4; | |
| escapeState=EscapeSecond; | |
| break; | |
| case EscapeSecond: | |
| escapedValue +=hex_value[ch]; | |
| s[dstPos++]=escapedValue; | |
| escapeState=EscapeRest; | |
| break; | |
| } | |
| srcPos++; | |
| } | |
| s[dstPos]=0; | |
| return s; | |
| } | |
| #ifdef WIN32 | |
| void back_slashes_to_slashes(char* s) { | |
| if(s) | |
| for(; *s; s++) | |
| if(*s=='\\') | |
| *s='/'; | |
| } | |
| /* | |
| void slashes_to_back_slashes(char* s) { | |
| if(s) | |
| for(; *s; s++) | |
| if(*s=='/') | |
| *s='\\'; | |
| } | |
| */ | |
| #endif | |
| bool StrEqNc(const char* s1, const char* s2, bool strict) { | |
| while(true) { | |
| if(!(*s1)) { | |
| if(!(*s2)) | |
| return true; | |
| else | |
| return !strict; | |
| } else if(!(*s2)) | |
| return !strict; | |
| if(isalpha(*s1)) { | |
| if(tolower(*s1) !=tolower(*s2)) | |
| return false; | |
| } else if((*s1) !=(*s2)) | |
| return false; | |
| s1++; | |
| s2++; | |
| } | |
| } | |
| static bool isLeap(int year) { | |
| return !( | |
| (year % 4) || ((year % 400) && !(year % 100)) | |
| ); | |
| } | |
| int getMonthDays(int year, int month) { | |
| int monthDays[]={ | |
| 31, | |
| isLeap(year) ? 29 : 28, | |
| 31, | |
| 30, | |
| 31, | |
| 30, | |
| 31, | |
| 31, | |
| 30, | |
| 31, | |
| 30, | |
| 31 | |
| }; | |
| return monthDays[month]; | |
| } | |
| void remove_crlf(char* start, char* end) { | |
| for(char* p=start; p<end; p++) | |
| switch(*p) { | |
| case '\n': *p='|'; break; | |
| case '\r': *p=' '; break; | |
| } | |
| } | |
| /// must be last in this file | |
| #undef vsnprintf | |
| int __vsnprintf(char* b, size_t s, const char* f, va_list l) { | |
| if(!s) | |
| return 0; | |
| int r; | |
| // note: on win32& maybe somewhere else | |
| // vsnprintf do not writes terminating 0 in 'buffer full' case, reducing | |
| --s; | |
| #if _MSC_VER | |
| /* | |
| win32: | |
| mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm | |
| if the number of bytes to write exceeds buffer, then count bytes are written and –1 is returned | |
| */ | |
| r=_vsnprintf(b, s, f, l); | |
| if(r<0) | |
| r=s; | |
| #else | |
| r=vsnprintf(b, s, f, l); | |
| /* | |
| solaris: | |
| man vsnprintf | |
| The snprintf() function returns the number of characters | |
| formatted, that is, the number of characters that would have | |
| been written to the buffer if it were large enough. If the | |
| value of n is 0 on a call to snprintf(), an unspecified | |
| value less than 1 is returned. | |
| */ | |
| if(r<0) | |
| r=0; | |
| else if(r>s) | |
| r=s; | |
| #endif | |
| b[r]=0; | |
| return r; | return r; |
| } | } |
| int __snprintf(char *b, size_t s, const char *f, ...) { | |
| int __snprintf(char* b, size_t s, const char* f, ...) { | |
| va_list l; | va_list l; |
| va_start(l, f); | va_start(l, f); |
| int r=__vsnprintf(b, s, f, l); | int r=__vsnprintf(b, s, f, l); |
| va_end(l); | va_end(l); |
| return r; | return r; |
| } | } |
| #endif | int pa_sleep(unsigned long secs, unsigned long usecs) { |
| for (; usecs >= 1000000; ++secs, usecs -= 1000000); | |
| char *file_read(Pool& pool, char *fname, bool fail_on_read_problem) { | |
| int f; | |
| struct stat finfo; | |
| if (fname && !stat(fname,&finfo) && (f=open(fname,O_RDONLY | |
| #ifdef WIN32 | #ifdef WIN32 |
| |O_TEXT | Sleep(secs * 1000 + usecs / 1000); |
| return 0; | |
| #else | |
| struct timeval t; | |
| t.tv_sec = secs; | |
| t.tv_usec = usecs; | |
| return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0); | |
| #endif | #endif |
| ))>=0){ | } |
| /*if(exclusive) | |
| flock(f, LOCK_EX);*/ | |
| // attributed meaning | |
| char *result=static_cast<char *>(pool.malloc(finfo.st_size+1)); | |
| int read_size=read(f,result,finfo.st_size); | static size_t date_attribute(const VDate& vdate, char *buf, size_t buf_size) { |
| if(read_size>=0 && read_size<=finfo.st_size) | const char month_names[12][4]={ |
| result[read_size]='\0'; | "Jan","Feb","Mar","Apr","May","Jun","Jul","Aug","Sep","Oct","Nov","Dec"}; |
| /*if(exclusive) | const char days[7][4]={ |
| flock(f, LOCK_UN);*/ | "Sun","Mon","Tue","Wed","Thu","Fri","Sat"}; |
| close(f); | |
| return result;//prepare_config(result, remove_empty_lines); | time_t when=vdate.get_time(); |
| } | struct tm *tms=gmtime(&when); |
| if(fail_on_read_problem) | if(!tms) |
| POOL_THROW(0,0, | throw Exception(0, |
| 0, | 0, |
| "use: can not read '%s' file", fname); | "bad time in attribute value (seconds from epoch=%ld)", when); |
| return NULL; | return snprintf(buf, MAX_STRING, "%s, %.2d-%s-%.4d %.2d:%.2d:%.2d GMT", |
| days[tms->tm_wday], | |
| tms->tm_mday,month_names[tms->tm_mon],tms->tm_year+1900, | |
| tms->tm_hour,tms->tm_min,tms->tm_sec); | |
| } | |
| static void append_attribute_meaning(String& result, | |
| Value& value, String::Untaint_lang lang, bool forced) { | |
| if(const String *string=value.get_string()) | |
| result.append(string->join_chains(result.pool(), 0), lang, forced); | |
| else | |
| if(Value *vdate=value.as(VDATE_TYPE, false)) { | |
| char *buf=(char *)result.malloc(MAX_STRING); | |
| size_t size=date_attribute(*static_cast<VDate *>(vdate), | |
| buf, MAX_STRING); | |
| result.APPEND_CLEAN(buf, size, "converted from date", 0); | |
| } else | |
| throw Exception("parser.runtime", | |
| &result, | |
| "trying to append here neither string nor date (%s)", | |
| value.type()); | |
| } | |
| #ifndef DOXYGEN | |
| struct Attributed_meaning_info { | |
| String *header; // header line being constructed | |
| String::Untaint_lang lang; // language in which to append to that line | |
| bool forced; // do they force that lang? | |
| }; | |
| #endif | |
| static void append_attribute_subattribute(const Hash::Key& akey, Hash::Val *avalue, | |
| void *info) { | |
| if(akey==VALUE_NAME) | |
| return; | |
| Attributed_meaning_info& ami=*static_cast<Attributed_meaning_info *>(info); | |
| // ...; charset=windows1251 | |
| *ami.header << "; "; | |
| ami.header->append(akey, ami.lang, ami.forced); | |
| *ami.header << "="; | |
| append_attribute_meaning(*ami.header, *static_cast<Value *>(avalue), ami.lang, ami.forced); | |
| } | |
| const String& attributed_meaning_to_string(Value& meaning, | |
| String::Untaint_lang lang, bool forced) { | |
| String &result=*new(meaning.pool()) String(meaning.pool()); | |
| if(Hash *hash=meaning.get_hash(0)) { | |
| // $value(value) $subattribute(subattribute value) | |
| if(Value *value=static_cast<Value *>(hash->get(*value_name))) | |
| append_attribute_meaning(result, *value, lang, forced); | |
| Attributed_meaning_info attributed_meaning_info={&result, lang}; | |
| hash->for_each(append_attribute_subattribute, &attributed_meaning_info); | |
| } else // result value | |
| append_attribute_meaning(result, meaning, lang, forced); | |
| return result; | |
| } | } |