--- parser3/src/main/pa_common.C 2001/03/12 13:13:21 1.8 +++ parser3/src/main/pa_common.C 2002/08/05 13:45:53 1.113 @@ -1,68 +1,395 @@ -/* - Parser - Copyright(c) 2001 ArtLebedev Group(http://www.artlebedev.com) - Author: Alexander Petrosyan (http://design.ru/paf) +/** @file + Parser: commonly functions. - $Id: pa_common.C,v 1.8 2001/03/12 13:13:21 paf Exp $ + Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com) + Author: Alexandr Petrosian (http://paf.design.ru) */ -#ifdef HAVE_CONFIG_H -# include "pa_config.h" -#endif - -#include -#include -#include -#include -#include -#include +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" +#include "pa_pool.h" +#include "pa_globals.h" +#include "pa_value.h" +#include "pa_hash.h" +#include "pa_string.h" #ifdef WIN32 +# include +#endif -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; -} +// some maybe-undefined constants + +#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 -char *file_read(Pool& pool, const char *fname, bool fail_on_read_problem) { - int f; +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; + } + + 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=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]=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 - ))>=0) { - /*if(exclusive) - flock(f, LOCK_EX);*/ - - char *result=static_cast(pool.malloc(finfo.st_size+1)); - int read_size=read(f,result,finfo.st_size); - if(read_size>=0 && read_size<=finfo.st_size) - result[read_size]='\0'; - /*if(exclusive) - flock(f, LOCK_UN);*/ + size_t max_size=limit?min(offset+limit, (size_t)finfo.st_size)-offset:finfo.st_size; + if(!max_size) { // eof + 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), 3); + if(offset) + lseek(f, offset, SEEK_SET); + data_size=read(f, data, max_size); + } + unlock(f); close(f); - return result;//prepare_config(result, remove_empty_lines); + if(!max_size) // eof + return true; + + 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", + 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) - POOL_THROW(0,0, - 0, - "use: can not read '%s' file", fname); - return 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); + 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, 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 + create_dir_for_file(file_spec); + + 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(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 + unlock(f); + close(f); + /*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); + } +} +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); +} + + +static bool entry_readable(const String& file_spec, bool need_dir) { + 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; + 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) { @@ -77,9 +404,9 @@ char *getrow(char **row_ref, char delim) return result; } -char *lsplit(char *string_ref, char delim) { - if(string_ref) { - char *v=strchr(string_ref, delim); +char *lsplit(char *string, char delim) { + if(string) { + char *v=strchr(string, delim); if(v) { *v=0; return v+1; @@ -94,3 +421,259 @@ char *lsplit(char **string_ref, char del *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; +} + +/// used by attributed_meaning_to_string / append_attribute_subattribute +struct Attributed_meaning_info { + String *header; // header line being constructed + String::Untaint_lang lang; // language in which to append to that line +}; +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(info); + + // ...; charset=windows1251 + *ami.header << "; "; + ami.header->append(akey, ami.lang); + *ami.header << "="; + ami.header->append(static_cast(avalue)->as_string(), ami.lang); +} +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(0)) { + // $value(value) $subattribute(subattribute value) + if(Value *value=static_cast(hash->get(*value_name))) + result.append(value->as_string(), lang, true); + + Attributed_meaning_info attributed_meaning_info={ + &result, + lang + }; + hash->for_each(append_attribute_subattribute, &attributed_meaning_info); + } else // result value + result.append(meaning.as_string(), lang, true); + + return result; +} + +#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; ps) + 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 +}