--- parser3/src/main/pa_common.C 2001/10/19 12:43:30 1.73 +++ parser3/src/main/pa_common.C 2002/08/05 13:45:53 1.113 @@ -1,12 +1,12 @@ /** @file Parser: commonly functions. - Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) - - $Id: pa_common.C,v 1.73 2001/10/19 12:43:30 parser Exp $ + Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) */ +static const char* IDENT_COMMON_C="$Date: 2002/08/05 13:45:53 $"; + #include "pa_common.h" #include "pa_types.h" #include "pa_exception.h" @@ -16,46 +16,95 @@ #include "pa_hash.h" #include "pa_string.h" -#ifndef WIN32 -# ifndef _O_TEXT -# define _O_TEXT 0 -# endif -# ifndef _O_BINARY -# define _O_BINARY 0 -# endif +#ifdef WIN32 +# include #endif -#if _MSC_VER +// some maybe-undefined constants -int __vsnprintf(char *b, size_t s, const char *f, va_list l) { - int r=_vsnprintf(b, --s, f, l); - b[s]=0; - return r; -} -int __snprintf(char *b, size_t s, const char *f, ...) { - va_list l; - va_start(l, f); - int r=__vsnprintf(b, s, f, l); - va_end(l); - return r; -} +#ifndef _O_TEXT +# define _O_TEXT 0 +#endif +#ifndef _O_BINARY +# define _O_BINARY 0 +#endif +#ifndef O_TRUNC +# define O_TRUNC 0 +#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 + +static char *strnchr(char *buf, size_t size, char c) { + // sanity check + if(!buf) + return 0; + + for(; size-->0; buf++) { + if(*buf==c) + return buf; + } -// under WIN32 "t" mode fixes DOS chars OK, can't say that about other systems/ line break styles -static void fix_line_breaks(char *src, size_t& size) { - char *dest=src; + return 0; +} + +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=src; - while(char *eol=strchr(bol, '\r')) { + char *bol=buf; + while(char *eol=strnchr(bol, eob -bol, '\r')) { size_t len=eol-bol; if(dest!=bol) memcpy(dest, bol, len); dest+=len; *dest++='\n'; - if(eol[1]=='\n') { // \r,\n = DOS + if(&eol[1]=0 && - stat(fname, &finfo)==0) { - /*if(exclusive) - flock(f, LOCK_EX);*/ - size_t max_size=limit?min(offset+limit, finfo.st_size)-offset:finfo.st_size; + if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) { + if(lock_shared_blocking(f)!=0) { + Exception e("file.lock", + &file_spec, + "shared lock failed: %s (%d), actual filename '%s'", + strerror(errno), errno, fname); + unlock(f); + close(f); + if(fail_on_read_problem) + throw e; + return false; + } + if(stat(fname, &finfo)!=0) { + Exception e("file.missing", + &file_spec, + "stat failed: %s (%d), actual filename '%s'", + strerror(errno), errno, fname); + unlock(f); + close(f); + if(fail_on_read_problem) + throw e; + return false; + } +#ifdef NO_FOREIGN_GROUP_FILES + if(finfo.st_gid/*foreign?*/!=getegid()) { + Exception e("parser.runtime", + &file_spec, + "parser reading files of foreign group disabled [recompile parser without --disable-foreign-group-files configure option], actual filename '%s'", + fname); + unlock(f); + close(f); + if(fail_on_read_problem) + throw e; + return false; + } +#endif + size_t max_size=limit?min(offset+limit, (size_t)finfo.st_size)-offset:finfo.st_size; if(!max_size) { // eof - data=0; - read_size=0; + if(as_text) { + data=pool.malloc(1); + *(char*)data=0; + } else + data=0; + data_size=0; } else { - data=pool.malloc(max_size+(as_text?1:0)); + data=pool.malloc(max_size+(as_text?1:0), 3); if(offset) lseek(f, offset, SEEK_SET); - read_size=read(f, data, max_size); + data_size=read(f, data, max_size); } - /*if(exclusive) - flock(f, LOCK_UN);*/ + unlock(f); close(f); if(!max_size) // eof return true; - if(read_size>=0 && read_size<=max_size) { - if(as_text) - ((char*&)data)[read_size]=0; - } else - throw Exception(0, 0, + if(int(data_size)<0 || data_size>max_size) + throw Exception(0, &file_spec, "read failed: actually read %d bytes count not in [0..%lu] valid range", - read_size, (unsigned long)max_size); //never - - if(as_text) - fix_line_breaks((char *)data, read_size); + data_size, (unsigned long)max_size); //never + + if(as_text) { + fix_line_breaks((char *)data, data_size); + // note: after fixing + ((char*&)data)[data_size]=0; + } return true; } if(fail_on_read_problem) - throw Exception(0, 0, + throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0, &file_spec, "read failed: %s (%d), actual filename '%s'", strerror(errno), errno, fname); @@ -138,43 +221,88 @@ static void create_dir_for_file(const St } } -void file_write(Pool& pool, +bool file_write_action_under_lock( const String& file_spec, - const void *data, size_t size, - bool as_text/*, - bool exclusive*/) { + const char *action_name, void (*action)(int, void *), 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*/ + if(access(fname, W_OK)!=0) // no create_dir_for_file(file_spec); - if((f=open(fname, O_WRONLY|O_CREAT|_O_BINARY, 0666))>0) + if((f=open(fname, + O_CREAT|O_RDWR + |(as_text?_O_TEXT:_O_BINARY) + |(do_append?O_APPEND: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(access(fname, R_OK|W_OK)==0) { - int mode=O_RDWR|(as_text?_O_TEXT:_O_BINARY) -#ifdef WIN32 - |O_TRUNC -#endif - ; - if((f=open(fname, mode, 0666))>=0) { - /*if(exclusive) - flock(f, LOCK_EX);*/ - - if(size) write(f, data, size); -#ifndef WIN32 - ftruncate(f, size); + if(fail_on_lock_problem) + throw e; + return false; + } + + try { + action(f, context); + } catch(...) { +#if O_TRUNC==0 + if(!do_append) + ftruncate(f, tell(f)); #endif - /*if(exclusive) - flock(f, LOCK_UN);*/ + unlock(f); close(f); - return; + /*re*/throw; } + +#if O_TRUNC==0 + if(!do_append) + ftruncate(f, tell(f)); +#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(context); + if(info.size) { + size_t written=write(f, info.data, info.size); + if(written!=info.size) + throw Exception(0, + 0, + "write failed: %s (%d), number of bytes written not equal to requested(%u!=%u), %s", + strerror(errno), errno, + written, info.size); } - throw Exception(0, 0, - &file_spec, - "write failed: %s (%d), actual filename '%s'", - strerror(errno), errno, fname); +} +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] @@ -185,24 +313,28 @@ static void rmdir(const String& file_spe rmdir(file_spec.mid(0, pos_after-1/* / */).cstr(String::UL_FILE_SPEC)); } -void file_delete(Pool& pool, const String& 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) - throw Exception(0, 0, - &file_spec, - "unlink failed: %s (%d), actual filename '%s'", - strerror(errno), errno, fname); + 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(Pool& pool, const String& old_spec, const String& new_spec) { +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(0, 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); @@ -215,7 +347,7 @@ static bool entry_readable(const String& const char *fname=file_spec.cstr(String::UL_FILE_SPEC); struct stat finfo; if(access(fname, R_OK)==0 && stat(fname, &finfo)==0) { - bool is_dir=finfo.st_mode&S_IFDIR != 0; + bool is_dir=(finfo.st_mode&S_IFDIR) != 0; return is_dir==need_dir; } return false; @@ -247,7 +379,7 @@ bool file_stat(const String& file_spec, struct stat finfo; if(stat(fname, &finfo)!=0) if(fail_on_read_problem) - throw Exception(0, 0, + throw Exception("file.missing", &file_spec, "getting file size failed: %s (%d), real filename '%s'", strerror(errno), errno, fname); @@ -303,19 +435,23 @@ char *rsplit(char *string, char delim) { /// @todo less stupid type detection char *format(Pool& pool, double value, char *fmt) { - char *result=(char *)pool.malloc(MAX_NUMBER); + char local_buf[MAX_NUMBER]; + size_t size; + if(fmt) if(strpbrk(fmt, "diouxX")) if(strpbrk(fmt, "ouxX")) - snprintf(result, MAX_NUMBER, fmt, (uint)value ); + size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value); else - snprintf(result, MAX_NUMBER, fmt, (int)value ); + size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value); else - snprintf(result, MAX_NUMBER, fmt, value); + size=snprintf(local_buf, sizeof(local_buf), fmt, value); else - snprintf(result, MAX_NUMBER, "%d", (int)value); + size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value); - return result; + 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) { @@ -334,8 +470,8 @@ size_t stdout_write(const void *buf, siz #endif } -const char *unescape_chars(Pool& pool, const char *cp, int len) { - char *s=(char *)pool.malloc(len + 1); +char *unescape_chars(Pool& pool, const char *cp, int len) { + char *s=(char *)pool.malloc(len + 1, 5); enum EscapeState { EscapeRest, EscapeFirst, @@ -393,7 +529,7 @@ static void append_attribute_subattribut const String& attributed_meaning_to_string(Value& meaning, String::Untaint_lang lang) { String &result=*new(meaning.pool()) String(meaning.pool()); - if(Hash *hash=meaning.get_hash()) { + if(Hash *hash=meaning.get_hash(0)) { // $value(value) $subattribute(subattribute value) if(Value *value=static_cast(hash->get(*value_name))) result.append(value->as_string(), lang, true); @@ -445,7 +581,7 @@ bool StrEqNc(const char *s1, const char } } -static int isLeap(int year) { +static bool isLeap(int year) { return !( (year % 4) || ((year % 400) && !(year % 100)) ); @@ -475,4 +611,69 @@ void remove_crlf(char *start, char *end) case '\n': *p='|'; break; case '\r': *p=' '; break; } -} \ No newline at end of file +} + + +/// 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; +} + +int __snprintf(char *b, size_t s, const char *f, ...) { + va_list l; + va_start(l, f); + int r=__vsnprintf(b, s, f, l); + va_end(l); + return r; +} + +int pa_sleep(unsigned long secs, unsigned long usecs) { + for (; usecs >= 1000000; ++secs, usecs -= 1000000); + +#ifdef WIN32 + 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 +}