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| version 1.2, 2001/02/20 18:45:53 | version 1.333, 2024/10/02 22:54:03 |
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| Line 1 | Line 1 |
| /* | /** @file |
| $Id$ | Parser: commonly functions. |
| Copyright (c) 2000-2023 Art. Lebedev Studio (http://www.artlebedev.com) | |
| Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <paf@design.ru> | |
| */ | */ |
| #ifdef HAVE_CONFIG_H | #include "pa_common.h" |
| # include "pa_config.h" | #include "pa_exception.h" |
| #include "pa_hash.h" | |
| #include "pa_globals.h" | |
| #include "pa_charsets.h" | |
| #include "pa_http.h" | |
| #include "pa_request_charsets.h" | |
| #include "pa_request.h" | |
| #include "pa_idna.h" | |
| #include "pa_convert_utf.h" | |
| #ifdef _MSC_VER | |
| #include <windows.h> | |
| #include <direct.h> | |
| #endif | #endif |
| #include <fcntl.h> | #ifdef _MSC_VER |
| #include <sys/types.h> | #define pa_mkdir(path, mode) _mkdir(path) |
| #include <sys/stat.h> | #else |
| #include <io.h> | #define pa_mkdir(path, mode) mkdir(path, mode) |
| #include <stdio.h> | #endif |
| volatile const char * IDENT_PA_COMMON_C="$Id$" IDENT_PA_COMMON_H IDENT_PA_HASH_H IDENT_PA_ARRAY_H IDENT_PA_STACK_H; | |
| #include "pa_common.h" | // some maybe-undefined constants |
| #include "pa_types.h" | |
| #ifdef WIN32 | #ifndef _O_TEXT |
| # define _O_TEXT 0 | |
| #endif | |
| #ifndef _O_BINARY | |
| # define _O_BINARY 0 | |
| #endif | |
| int __vsnprintf(char *b, size_t s, const char *f, va_list l) { | #ifdef HAVE_FTRUNCATE |
| int r=_vsnprintf(b, --s, f, l); | # define PA_O_TRUNC 0 |
| b[s]=0; | #else |
| return r; | # ifdef _O_TRUNC |
| # define PA_O_TRUNC _O_TRUNC | |
| # else | |
| # error you must have either ftruncate function or _O_TRUNC bit declared | |
| # endif | |
| #endif | |
| // defines for globals | |
| #define FILE_STATUS_NAME "status" | |
| // globals | |
| const String file_status_name(FILE_STATUS_NAME); | |
| String sql_bind_name(SQL_BIND_NAME); | |
| String sql_limit_name(PA_SQL_LIMIT_NAME); | |
| String sql_offset_name(PA_SQL_OFFSET_NAME); | |
| String sql_default_name(SQL_DEFAULT_NAME); | |
| String sql_distinct_name(SQL_DISTINCT_NAME); | |
| String sql_value_type_name(SQL_VALUE_TYPE_NAME); | |
| // forwards | |
| const UTF16* pa_utf16_encode(const char* in, Charset& source_charset); | |
| // functions | |
| #ifdef _MSC_VER | |
| int pa_stat(const char *pathname, struct stat *buffer){ | |
| const UTF16* utf16name=pa_utf16_encode(pathname, pa_thread_request().charsets.source()); | |
| return _wstat64((const wchar_t *)utf16name, buffer); | |
| } | } |
| int __snprintf(char *b, size_t s, const char *f, ...) { | |
| va_list l; | int pa_open(const char *pathname, int flags, int mode){ |
| va_start(l, f); | const UTF16* utf16name=pa_utf16_encode(pathname, pa_thread_request().charsets.source()); |
| int r=__vsnprintf(b, s, f, l); | return _wopen((const wchar_t *)utf16name, flags, mode); |
| va_end(l); | } |
| return r; | |
| FILE *pa_fopen(const char *pathname, const char *mode){ | |
| const UTF16* utf16name=pa_utf16_encode(pathname, pa_thread_request().charsets.source()); | |
| const UTF16* utf16mode=pa_utf16_encode(mode, pa_thread_request().charsets.source()); | |
| return _wfopen((const wchar_t *)utf16name, (const wchar_t *)utf16mode); | |
| } | |
| #endif | |
| /// these options were handled but not checked elsewhere, now check them | |
| int pa_get_valid_file_options_count(HashStringValue& options) { | |
| int result=0; | |
| if(options.get(PA_SQL_LIMIT_NAME)) | |
| result++; | |
| if(options.get(PA_SQL_OFFSET_NAME)) | |
| result++; | |
| if(options.get(PA_COLUMN_SEPARATOR_NAME)) | |
| result++; | |
| if(options.get(PA_COLUMN_ENCLOSER_NAME)) | |
| result++; | |
| if(options.get(PA_CHARSET_NAME)) | |
| result++; | |
| return result; | |
| } | |
| #ifndef DOXYGEN | |
| struct File_read_action_info { | |
| char **data; size_t *data_size; | |
| char* buf; uint64_t offset; size_t limit; | |
| }; | |
| #endif | |
| static void file_read_action(struct stat& finfo, int f, const String& file_spec, void *context) { | |
| File_read_action_info& info = *static_cast<File_read_action_info *>(context); | |
| size_t to_read_size = check_file_size(info.limit && info.limit < (size_t)finfo.st_size ? info.limit : (size_t)finfo.st_size, &file_spec); | |
| if(to_read_size) { | |
| if(info.offset) | |
| pa_lseek(f, info.offset, SEEK_SET); // seek never fails as POSIX allows the file offset to be set beyond the EOF | |
| *info.data = info.buf ? info.buf : (char *)pa_malloc_atomic(to_read_size+1); | |
| ssize_t result = read(f, *info.data, to_read_size); | |
| if(result<0) | |
| throw Exception("file.read", &file_spec, "read failed: %s (%d)", strerror(errno), errno); | |
| *info.data_size = result; | |
| } else { // empty file | |
| // for both, text and binary: for text we need that terminator, for binary we need nonzero pointer to be able to save such files | |
| *info.data = (char *)pa_malloc_atomic(1); | |
| *(char*)(*info.data) = 0; | |
| *info.data_size = 0; | |
| return; | |
| } | |
| } | |
| File_read_result file_read_binary(const String& file_spec, bool fail_on_read_problem, char* buf, uint64_t offset, size_t limit) { | |
| File_read_result result = {false, 0, 0, 0}; | |
| File_read_action_info info = {&result.str, &result.length, buf, offset, limit}; | |
| result.success = file_read_action_under_lock(file_spec, "read", file_read_action, &info, 0, fail_on_read_problem); | |
| return result; | |
| } | |
| File_read_result file_read(Request_charsets& charsets, const String& file_spec, | |
| bool as_text, HashStringValue *options, | |
| bool fail_on_read_problem, | |
| size_t offset = 0, size_t limit = 0, bool transcode_text_result = true) { | |
| File_read_result result = {false, 0, 0, 0}; | |
| if(options){ | |
| int valid_options = pa_get_valid_file_options_count(*options); | |
| if(valid_options != options->count()) | |
| throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION); | |
| } | |
| File_read_action_info info = {&result.str, &result.length, 0, offset, limit}; | |
| result.success = file_read_action_under_lock(file_spec, "read", file_read_action, &info, as_text, fail_on_read_problem); | |
| if(as_text){ | |
| if(result.success){ | |
| Charset* asked_charset = 0; | |
| if(options) | |
| if(Value* vcharset_name = options->get(PA_CHARSET_NAME)) | |
| asked_charset = &pa_charsets.get(vcharset_name->as_string()); | |
| asked_charset = pa_charsets.checkBOM(result.str, result.length, asked_charset); | |
| if(result.length && transcode_text_result && asked_charset){ // length must be checked because transcode returns CONST string in case length==0, which contradicts hacking few lines below | |
| String::C body = String::C(result.str, result.length); | |
| body=Charset::transcode(body, *asked_charset, charsets.source()); | |
| result.str = const_cast<char*>(body.str); // hacking a little | |
| result.length = body.length; | |
| } | |
| } | |
| if(result.length) | |
| fix_line_breaks(result.str, result.length); | |
| } | |
| return result; | |
| } | |
| File_read_result file_load(Request& r, const String& file_spec, | |
| bool as_text, HashStringValue *options, | |
| bool fail_on_read_problem, | |
| bool transcode_text_result) { | |
| size_t offset = 0; | |
| size_t limit = 0; | |
| if(options){ | |
| if(Value *voffset = (Value *)options->get(sql_offset_name)) | |
| offset = r.process(*voffset).as_int(); | |
| if(Value *vlimit = (Value *)options->get(sql_limit_name)) | |
| limit = r.process(*vlimit).as_int(); | |
| // no check on options count here | |
| } | |
| if(file_spec.starts_with("http://")) { | |
| if(offset || limit) | |
| throw Exception(PARSER_RUNTIME, 0, "offset and load options are not supported for HTTP:// file load"); | |
| // fail on read problem | |
| File_read_http_result http = pa_internal_file_read_http(r, file_spec, as_text, options, transcode_text_result); | |
| File_read_result result = {true, http.str, http.length, http.headers}; | |
| return result; | |
| } else | |
| return file_read(r.charsets, file_spec, as_text, options, fail_on_read_problem, offset, limit, transcode_text_result); | |
| } | |
| char* file_read_text(Request_charsets& charsets, const String& file_spec, bool fail_on_read_problem) { | |
| File_read_result file = file_read(charsets, file_spec, true, 0, fail_on_read_problem); | |
| return file.success ? file.str : 0; | |
| } | |
| char* file_load_text(Request& r, const String& file_spec, bool fail_on_read_problem, HashStringValue* options, bool transcode_result) { | |
| File_read_result file = file_load(r, file_spec, true, options, fail_on_read_problem, transcode_result); | |
| return file.success ? file.str : 0; | |
| } | |
| #ifdef PA_SAFE_MODE | |
| void check_safe_mode(struct stat finfo, const String& file_spec, const char* fname) { | |
| if(finfo.st_uid/*foreign?*/!=geteuid() | |
| && finfo.st_gid/*foreign?*/!=getegid()) | |
| throw Exception(PARSER_RUNTIME, | |
| &file_spec, | |
| "parser is in safe mode: reading files of foreign group and user disabled " | |
| "[recompile parser with --disable-safe-mode configure option], " | |
| "actual filename '%s', fuid(%d)!=euid(%d) or fgid(%d)!=egid(%d)", | |
| fname, finfo.st_uid, geteuid(), finfo.st_gid, getegid() | |
| ); | |
| } | |
| #else | |
| void check_safe_mode(struct stat, const String&, const char*) { | |
| } | |
| #endif | |
| bool file_read_action_under_lock(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.taint_cstr(String::L_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=pa_open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) { | |
| try { | |
| if(pa_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(pa_fstat(f, &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); | |
| check_safe_mode(finfo, file_spec, fname); | |
| action(finfo, f, file_spec, context); | |
| } catch(...) { | |
| pa_unlock(f);close(f); | |
| if(fail_on_read_problem) | |
| rethrow; | |
| return false; | |
| } | |
| pa_unlock(f);close(f); | |
| return true; | |
| } else { | |
| if(fail_on_read_problem) | |
| throw Exception(errno==EACCES ? "file.access" : (errno==ENOENT || errno==ENOTDIR || errno==ENODEV) ? "file.missing" : 0, | |
| &file_spec, "%s failed: %s (%d), actual filename '%s'", action_name, strerror(errno), errno, fname); | |
| return false; | |
| } | |
| } | |
| void create_dir_for_file(const String& file_spec) { | |
| const char *str=file_spec.taint_cstr(String::L_FILE_SPEC); | |
| if(str[0]){ | |
| const char *pos=str+1; | |
| while((pos=strchr(pos,'/')) && pos[1]) { // to avoid trailing /, see #1166 | |
| pa_mkdir(pa_strdup(str,pos-str), 0775); | |
| pos++; | |
| } | |
| } | |
| } | |
| 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.taint_cstr(String::L_FILE_SPEC); | |
| int f; | |
| if(access(fname, W_OK)!=0) // no | |
| create_dir_for_file(file_spec); | |
| if((f=pa_open(fname, | |
| O_CREAT|O_RDWR | |
| |(as_text?_O_TEXT:_O_BINARY) | |
| |(do_append?O_APPEND:PA_O_TRUNC), 0664))>=0) { | |
| if((do_block?pa_lock_exclusive_blocking(f):pa_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 { | |
| #if (defined(HAVE_FCHMOD) && defined(PA_SAFE_MODE)) | |
| struct stat finfo; | |
| if(pa_fstat(f, &finfo)==0 && finfo.st_mode & 0111) | |
| fchmod(f, finfo.st_mode & 0666/*clear executable bits*/); // backward: ignore errors if any | |
| #endif | |
| action(f, context); | |
| } catch(...) { | |
| #ifdef HAVE_FTRUNCATE | |
| if(!do_append) | |
| ftruncate(f, lseek(f, 0, SEEK_CUR)); // one cannot use O_TRUNC, read lower | |
| #endif | |
| pa_unlock(f);close(f); | |
| rethrow; | |
| } | |
| #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 | |
| pa_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 char* str; | |
| size_t length; | |
| }; | |
| #endif | |
| static void file_write_action(int f, void *context) { | |
| File_write_action_info& info=*static_cast<File_write_action_info *>(context); | |
| if(info.length) { | |
| ssize_t written=write(f, info.str, info.length); | |
| if(written<0) | |
| throw Exception("file.write", 0, "write failed: %s (%d)", strerror(errno), errno); | |
| if((size_t)written!=info.length) | |
| throw Exception("file.write", 0, "write failed: %u of %u bytes written", written, info.length); | |
| } | |
| } | |
| void file_write( | |
| Request_charsets& charsets, | |
| const String& file_spec, | |
| const char* data, | |
| size_t size, | |
| bool as_text, | |
| bool do_append, | |
| Charset* asked_charset) { | |
| if(as_text && asked_charset){ | |
| String::C body=String::C(data, size); | |
| body=Charset::transcode(body, charsets.source(), *asked_charset); | |
| data=body.str; | |
| size=body.length; | |
| }; | |
| File_write_action_info info={data, size}; | |
| file_write_action_under_lock( | |
| file_spec, | |
| "write", | |
| file_write_action, | |
| &info, | |
| as_text, | |
| do_append); | |
| } | |
| static size_t get_dir(char* fname, size_t helper_length){ | |
| bool dir=false; | |
| size_t pos=0; | |
| for(pos=helper_length; pos; pos--){ | |
| char c=fname[pos-1]; | |
| if(c=='/' || c=='\\'){ | |
| fname[pos-1]=0; | |
| dir=true; | |
| } else if(dir) break; | |
| } | |
| return pos; | |
| } | |
| bool entry_exists(const char* fname, struct stat *afinfo) { | |
| struct stat lfinfo; | |
| bool result=pa_stat(fname, &lfinfo)==0; | |
| if(afinfo) | |
| *afinfo=lfinfo; | |
| return result; | |
| } | |
| bool entry_exists(const String& file_spec) { | |
| return entry_exists(file_spec.taint_cstr(String::L_FILE_SPEC), 0); | |
| } | |
| static bool entry_ifdir(char *fname, bool need_dir) { | |
| 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(entry_exists(fname, &finfo)) { | |
| bool is_dir=(finfo.st_mode&S_IFDIR) != 0; | |
| return is_dir==need_dir; | |
| } | |
| return false; | |
| } | |
| static bool entry_ifdir(const String& file_spec, bool need_dir) { | |
| return entry_ifdir(file_spec.taint_cstrm(String::L_FILE_SPEC), need_dir); | |
| } | |
| // throws nothing! [this is required in file_move & file_delete] | |
| static void rmdir(const String& file_spec, size_t pos_after) { | |
| char* dir_spec=file_spec.taint_cstrm(String::L_FILE_SPEC); | |
| size_t length=strlen(dir_spec); | |
| while( (length=get_dir(dir_spec, length)) && (length > pos_after) ){ | |
| #ifdef _MSC_VER | |
| if(!entry_ifdir(dir_spec, true)) | |
| break; | |
| DWORD attrs=GetFileAttributes(dir_spec); | |
| if( | |
| (attrs==INVALID_FILE_ATTRIBUTES) | |
| || !(attrs & FILE_ATTRIBUTE_DIRECTORY) | |
| || (attrs & FILE_ATTRIBUTE_REPARSE_POINT) | |
| ) | |
| break; | |
| #endif | |
| if( rmdir(dir_spec) ) | |
| break; | |
| }; | |
| } | |
| bool file_delete(const String& file_spec, bool fail_on_problem, bool keep_empty_dirs) { | |
| const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC); | |
| if(unlink(fname)!=0) { | |
| if(fail_on_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; | |
| } | |
| if(!keep_empty_dirs) | |
| rmdir(file_spec, 1); | |
| return true; | |
| } | |
| void file_move(const String& old_spec, const String& new_spec, bool keep_empty_dirs) { | |
| const char* old_spec_cstr=old_spec.taint_cstr(String::L_FILE_SPEC); | |
| const char* new_spec_cstr=new_spec.taint_cstr(String::L_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); | |
| if(!keep_empty_dirs) | |
| rmdir(old_spec, 1); | |
| } | |
| bool file_exist(const String& file_spec) { | |
| return entry_ifdir(file_spec, false); | |
| } | |
| bool dir_exists(const String& file_spec) { | |
| return entry_ifdir(file_spec, true); | |
| } | |
| const String* file_exist(const String& path, const String& name) { | |
| String& result=*new String(path); | |
| if(path.last_char() != '/') | |
| result << "/"; | |
| result << name; | |
| return file_exist(result)?&result:0; | |
| } | |
| bool file_executable(const String& file_spec) { | |
| return access(file_spec.taint_cstr(String::L_FILE_SPEC), X_OK)==0; | |
| } | |
| bool file_stat(const String& file_spec, uint64_t& rsize, time_t& ratime, time_t& rmtime, time_t& rctime, bool fail_on_read_problem) { | |
| const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC); | |
| struct stat finfo; | |
| if(pa_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=(time_t)finfo.st_atime; | |
| rmtime=(time_t)finfo.st_mtime; | |
| rctime=(time_t)finfo.st_ctime; | |
| return true; | |
| } | |
| size_t check_file_size(uint64_t size, const String* file_spec){ | |
| if(size > (uint64_t)pa_file_size_limit) | |
| throw Exception(PARSER_RUNTIME, file_spec, "content size of %.15g bytes exceeds the limit (%.15g bytes)", (double)size, (double)pa_file_size_limit); | |
| return (size_t)size; | |
| } | |
| /** | |
| String related functions | |
| */ | |
| bool capitalized(const char* s){ | |
| bool upper=true; | |
| for(const char* c=s; *c; c++){ | |
| if(*c != (upper ? toupper((unsigned char)*c) : tolower((unsigned char)*c))) | |
| return false; | |
| upper=strchr("-_ ", *c) != 0; | |
| } | |
| return true; | |
| } | |
| const char* capitalize(const char* s){ | |
| if(!s || capitalized(s)) | |
| return s; | |
| char* result=pa_strdup(s); | |
| if(result){ | |
| bool upper=true; | |
| for(char* c=result; *c; c++){ | |
| *c=upper ? (char)toupper((unsigned char)*c) : (char)tolower((unsigned char)*c); | |
| upper=strchr("-_ ", *c) != 0; | |
| } | |
| } | |
| return (const char*)result; | |
| } | |
| char *str_lower(const char *s, size_t length){ | |
| char *result=pa_strdup(s, length); | |
| for(char* c=result; *c; c++) | |
| *c=(char)tolower((unsigned char)*c); | |
| return result; | |
| } | |
| char *str_upper(const char *s, size_t length){ | |
| char *result=pa_strdup(s, length); | |
| for(char* c=result; *c; c++) | |
| *c=(char)toupper((unsigned char)*c); | |
| return result; | |
| } | |
| void fix_line_breaks(char *str, size_t& length) { | |
| //_asm int 3; | |
| const char* const eob=str+length; | |
| char* dest=str; | |
| // fix DOS: \r\n -> \n | |
| // fix Macintosh: \r -> \n | |
| char* bol=str; | |
| while(char* eol=(char*)memchr(bol, '\r', eob -bol)) { | |
| size_t len=eol-bol; | |
| if(dest!=bol) | |
| memmove(dest, bol, len); | |
| dest+=len; | |
| *dest++='\n'; | |
| if(&eol[1]<eob && eol[1]=='\n') { // \r, \n = DOS | |
| bol=eol+2; | |
| length--; | |
| } else // \r, not \n = Macintosh | |
| bol=eol+1; | |
| } | |
| // last piece without \r | |
| if(dest!=bol) | |
| memmove(dest, bol, eob-bol); | |
| str[length]=0; // terminating | |
| } | |
| /** | |
| scans for @a delim[default \n] in @a *row_ref, | |
| @return piece of line before it or end of string, if no @a delim found | |
| assigns @a *row_ref to point right after delimiter if there were one | |
| or to zero if no @a delim were found. | |
| */ | |
| 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; | |
| } | |
| void pa_strncpy(char *dst, const char *src, size_t n){ | |
| size_t left = n; | |
| if (left != 0 && src) { | |
| while (--left != 0) { | |
| if ((*dst++ = *src++) == '\0') | |
| return; | |
| } | |
| } | |
| if (n != 0) | |
| *dst = '\0'; | |
| } | |
| #define STRCAT_STEP(str, len) if(str) { memcpy(ptr, str, len); ptr += len; } | |
| char *pa_strcat(const char *a, const char *b, const char *c) { | |
| size_t len_a = a ? strlen(a) : 0; | |
| size_t len_b = b ? strlen(b) : 0; | |
| size_t len_c = c ? strlen(c) : 0; | |
| char *result=new(PointerFreeGC) char[len_a + len_b + len_c +1/*0*/]; | |
| char *ptr=result; | |
| STRCAT_STEP(a, len_a); | |
| STRCAT_STEP(b, len_b); | |
| STRCAT_STEP(c, len_c); | |
| *ptr='\0'; | |
| return result; | |
| } | |
| const char *pa_filename(const char *path){ | |
| if(!path) | |
| return NULL; | |
| for(const char *c = path + strlen(path) - 1; c >= path; c--) { | |
| if(*c == '/' || *c == '\\') | |
| return c+1; | |
| } | |
| return path; | |
| } | |
| // format: %[flags][width][.precision]type http://msdn.microsoft.com/ru-ru/library/56e442dc(en-us,VS.80).aspx | |
| // flags: '-', '+', ' ', '#', '0' http://msdn.microsoft.com/ru-ru/library/8aky45ct(en-us,VS.80).aspx | |
| // width, precision: non negative decimal number | |
| enum FormatType { | |
| FormatInvalid, | |
| FormatInt, | |
| FormatUInt, | |
| FormatDouble | |
| }; | |
| FormatType format_type(const char* fmt){ | |
| enum FormatState { | |
| Percent, | |
| Flags, | |
| Width, | |
| Precision, | |
| Done | |
| } state=Percent; | |
| FormatType result=FormatInvalid; | |
| const char* pos=fmt; | |
| while(char c=*(pos++)){ | |
| switch(state){ | |
| case Percent: | |
| if(c=='%'){ | |
| state=Flags; | |
| } else { | |
| return FormatInvalid; // 1st char must be '%' only | |
| } | |
| break; | |
| case Flags: | |
| if(strchr("-+ #0", c)!=0){ | |
| break; | |
| } | |
| // go to the next step | |
| case Width: | |
| if(c=='.'){ | |
| state=Precision; | |
| break; | |
| } | |
| // go to the next step | |
| case Precision: | |
| if(c>='0' && c<='9'){ | |
| if(state == Flags) state=Width; // no more flags | |
| break; | |
| } else if(c=='d' || c=='i'){ | |
| result=FormatInt; | |
| } else if(strchr("feEgG", c)!=0){ | |
| result=FormatDouble; | |
| } else if(strchr("uoxX", c)!=0){ | |
| result=FormatUInt; | |
| } else { | |
| return FormatInvalid; // invalid char | |
| } | |
| state=Done; | |
| break; | |
| case Done: | |
| return FormatInvalid; // no chars allowed after 'type' | |
| } | |
| } | |
| return result; | |
| } | |
| const char* format_double(double value, const char* fmt) { | |
| char local_buf[MAX_NUMBER]; | |
| int size=-1; | |
| if(fmt && strlen(fmt)){ | |
| switch(format_type(fmt)){ | |
| case FormatDouble: | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, value); | |
| break; | |
| case FormatUInt: | |
| if(value >= 0){ // on Apple M1 (uint)<negative value> is 0 | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, clip2uint(value)); | |
| break; | |
| } | |
| case FormatInt: | |
| size=snprintf(local_buf, sizeof(local_buf), fmt, clip2int(value)); | |
| break; | |
| case FormatInvalid: | |
| throw Exception(PARSER_RUNTIME, 0, "Incorrect format string '%s' was specified.", fmt); | |
| } | |
| } else | |
| return pa_itoa(clip2int(value)); | |
| if(size < 0 || size >= MAX_NUMBER-1){ // on win32 we manually reduce max size while printing | |
| throw Exception(PARSER_RUNTIME, 0, "Error occurred white executing snprintf with format string '%s'.", fmt); | |
| } | |
| return pa_strdup(local_buf, (size_t)size); | |
| } | } |
| size_t stdout_write(const void *buf, size_t size) { | |
| #ifdef WIN32 | |
| size_t to_write = size; | |
| do{ | |
| int chunk_written=fwrite(buf, 1, min((size_t)8*0x400, size), stdout); | |
| if(chunk_written<=0) | |
| break; | |
| size-=chunk_written; | |
| buf=((const char*)buf)+chunk_written; | |
| } while(size>0); | |
| fflush(stdout); | |
| return to_write-size; | |
| #else | |
| size_t result=fwrite(buf, 1, size, stdout); | |
| fflush(stdout); | |
| return result; | |
| #endif | #endif |
| } | |
| enum EscapeState { | |
| EscapeRest, | |
| EscapeFirst, | |
| EscapeSecond, | |
| EscapeUnicode | |
| }; | |
| // @todo prescan for reduce required size (unescaped sting in 1 byte charset requires less memory usually) | |
| char* unescape_chars(const char* cp, int len, Charset* charset, bool js){ | |
| char* s=new(PointerFreeGC) char[len+1]; // must be enough (%uXXXX==6 bytes, max utf-8 char length==6 bytes) | |
| char* dst=s; | |
| EscapeState escapeState=EscapeRest; | |
| uint escapedValue=0; | |
| int srcPos=0; | |
| short int jsCnt=0; | |
| while(srcPos<len){ | |
| uchar c=(uchar)cp[srcPos]; | |
| if(c=='%' || (c=='\\' && js)){ | |
| escapeState=EscapeFirst; | |
| } else { | |
| switch(escapeState) { | |
| case EscapeRest: | |
| if(c=='+' && !js){ | |
| *dst++=' '; | |
| } else { | |
| *dst++=c; | |
| } | |
| break; | |
| case EscapeFirst: | |
| if(charset && c=='u'){ | |
| // escaped unicode value: %u0430 | |
| jsCnt=0; | |
| escapedValue=0; | |
| escapeState=EscapeUnicode; | |
| } else { | |
| if(isxdigit(c)){ | |
| escapedValue=hex_value[c] << 4; | |
| escapeState=EscapeSecond; | |
| } else { | |
| *dst++=c; | |
| escapeState=EscapeRest; | |
| } | |
| } | |
| break; | |
| case EscapeSecond: | |
| if(isxdigit(c)){ | |
| escapedValue+=hex_value[c]; | |
| *dst++=(char)escapedValue; | |
| } | |
| escapeState=EscapeRest; | |
| break; | |
| case EscapeUnicode: | |
| if(isxdigit(c)){ | |
| escapedValue=(escapedValue << 4) + hex_value[c]; | |
| if(++jsCnt==4){ | |
| // transcode utf8 char to client charset (we can lost some chars here) | |
| charset->store_Char((XMLByte*&)dst, (XMLCh)escapedValue, '?'); | |
| escapeState=EscapeRest; | |
| } | |
| } else { | |
| // not full unicode value | |
| escapeState=EscapeRest; | |
| } | |
| break; | |
| } | |
| } | |
| srcPos++; | |
| } | |
| *dst=0; // zero-termination | |
| return s; | |
| } | |
| char *search_stop(char*& current, char cstop_at) { | |
| // sanity check | |
| if(!current) | |
| return 0; | |
| // skip leading WS | |
| while(*current==' ' || *current=='\t') | |
| current++; | |
| if(!*current) | |
| return current=0; | |
| char *result=current; | |
| if(char *pstop_at=strchr(current, cstop_at)) { | |
| *pstop_at=0; | |
| current=pstop_at+1; | |
| } else | |
| current=0; | |
| return result; | |
| } | |
| char *file_read(Pool& pool, char *fname) { | |
| int f; | |
| struct stat finfo; | |
| if (fname && !stat(fname,&finfo) && (f=open(fname,O_RDONLY | |
| #ifdef WIN32 | #ifdef WIN32 |
| |O_TEXT | void back_slashes_to_slashes(char* s) { |
| if(s) | |
| for(; *s; s++) | |
| if(*s=='\\') | |
| *s='/'; | |
| } | |
| #endif | #endif |
| ))>=0){ | |
| /*if(exclusive) | size_t strpos(const char *str, const char *substr) { |
| flock(f, LOCK_EX);*/ | const char *p = strstr(str, substr); |
| return (p==0)?STRING_NOT_FOUND:p-str; | |
| char *result=static_cast<char *>(pool.malloc(finfo.st_size+1)); | } |
| int read_size=read(f,result,finfo.st_size); | |
| if(read_size>=0 && read_size<=finfo.st_size) | size_t remove_crlf(char* start, char* end) { |
| result[read_size]='\0'; | char* from=start; |
| /*if(exclusive) | char* to=start; |
| flock(f, LOCK_UN);*/ | bool skip=false; |
| close(f); | while(from < end){ |
| return result;//prepare_config(result, remove_empty_lines); | switch(*from){ |
| } | case '\n': |
| // maybe: exception? | case '\r': |
| return NULL; | case '\t': |
| case ' ': | |
| if(!skip){ | |
| *to=' '; | |
| to++; | |
| skip=true; | |
| } | |
| break; | |
| default: | |
| if(from != to) | |
| *to=*from; | |
| to++; | |
| skip=false; | |
| } | |
| from++; | |
| } | |
| return to-start; | |
| } | } |
| const char* hex_digits="0123456789ABCDEF"; | |
| const char* hex_string(unsigned char* bytes, size_t size, bool upcase) { | |
| char *bytes_hex=new(PointerFreeGC) char [size*2/*byte->hh*/+1/*for zero-teminator*/]; | |
| unsigned char *src=bytes; | |
| unsigned char *end=bytes+size; | |
| char *dest=bytes_hex; | |
| const char *hex=upcase? hex_digits : "0123456789abcdef"; | |
| for(; src<end; src++) { | |
| *dest++=hex[*src/0x10]; | |
| *dest++=hex[*src%0x10]; | |
| } | |
| *dest=0; | |
| return bytes_hex; | |
| } | |
| ssize_t file_block_read(const int f, void* buffer, const size_t size){ | |
| ssize_t nCount = read(f, buffer, size); | |
| if (nCount < 0) | |
| throw Exception("file.read", 0, "read failed: %s (%d)", strerror(errno), errno); | |
| return nCount; | |
| } | |
| static unsigned long crc32Table[256]; | |
| static void InitCrc32Table() | |
| { | |
| if(crc32Table[1] == 0){ | |
| // This is the official polynomial used by CRC32 in PKZip. | |
| // Often times the polynomial shown reversed as 0x04C11DB7. | |
| static const unsigned long dwPolynomial = 0xEDB88320; | |
| for(int i = 0; i < 256; i++) | |
| { | |
| unsigned long dwCrc = i; | |
| for(int j = 8; j > 0; j--) | |
| { | |
| if(dwCrc & 1) | |
| dwCrc = (dwCrc >> 1) ^ dwPolynomial; | |
| else | |
| dwCrc >>= 1; | |
| } | |
| crc32Table[i] = dwCrc; | |
| } | |
| } | |
| } | |
| inline void CalcCrc32(const unsigned char byte, unsigned long &crc32) | |
| { | |
| crc32 = ((crc32) >> 8) ^ crc32Table[(byte) ^ ((crc32) & 0x000000FF)]; | |
| } | |
| unsigned long pa_crc32(const char *in, size_t in_size){ | |
| unsigned long crc32=0xFFFFFFFF; | |
| InitCrc32Table(); | |
| for(size_t i = 0; i<in_size; i++) | |
| CalcCrc32(in[i], crc32); | |
| return ~crc32; | |
| } | |
| static void file_crc32_file_action(struct stat& finfo, int f, const String&, void *context) { | |
| unsigned long& crc32=*static_cast<unsigned long *>(context); | |
| if(finfo.st_size) { | |
| InitCrc32Table(); | |
| int nCount=0; | |
| do { | |
| unsigned char buffer[FILE_BUFFER_SIZE]; | |
| nCount = file_block_read(f, buffer, sizeof(buffer)); | |
| for(int i = 0; i < nCount; i++) CalcCrc32(buffer[i], crc32); | |
| } while(nCount > 0); | |
| } | |
| } | |
| unsigned long pa_crc32(const String& file_spec){ | |
| unsigned long crc32=0xFFFFFFFF; | |
| file_read_action_under_lock(file_spec, "crc32", file_crc32_file_action, &crc32); | |
| return ~crc32; | |
| } | |
| // content-type: xxx; charset=WE-NEED-THIS | |
| // content-type: xxx; charset="WE-NEED-THIS" | |
| // content-type: xxx; charset="WE-NEED-THIS"; | |
| Charset* detect_charset(const char* content_type){ | |
| if(content_type){ | |
| char* CONTENT_TYPE=str_upper(content_type); | |
| if(const char* begin=strstr(CONTENT_TYPE, "CHARSET=")){ | |
| begin+=8; // skip "CHARSET=" | |
| char* end=0; | |
| if(*begin && (*begin=='"' || *begin =='\'')){ | |
| char quote=*begin; | |
| begin++; | |
| end=(char*)strchr(begin, quote); | |
| } | |
| if(!end) | |
| end=(char*)strchr(begin, ';'); | |
| if(end) | |
| *end=0; // terminator | |
| return *begin ? &pa_charsets.get_direct(begin) : 0; | |
| } | |
| } | |
| return 0; | |
| } | |
| const UTF16* pa_utf16_encode(const char* in, Charset& source_charset){ | |
| if(!in) | |
| return 0; | |
| String::C sIn(in,strlen(in)); | |
| UTF16* utf16=(UTF16*)pa_malloc_atomic(sIn.length*2+2); | |
| UTF16* utf16_end=utf16; | |
| if(!source_charset.isUTF8()) | |
| sIn=Charset::transcode(sIn, source_charset, pa_UTF8_charset); | |
| int status=pa_convertUTF8toUTF16((const UTF8**)&sIn.str, (const UTF8*)(sIn.str+sIn.length), &utf16_end, utf16+sIn.length, strictConversion); | |
| if(status != conversionOK) | |
| throw Exception("utf-16 encode", new String(in), "utf-16 conversion failed (%d)", status); | |
| *utf16_end=0; | |
| return utf16; | |
| } | |
| const char* pa_utf16_decode(const UTF16* in, Charset& asked_charset){ | |
| if(!in) | |
| return 0; | |
| const UTF16* utf16_start=in; | |
| const UTF16* utf16_end; | |
| for(utf16_end=in; *utf16_end; utf16_end++); | |
| char *result = (char *)pa_malloc_atomic((utf16_end-in)*6+1); | |
| char *result_end = result; | |
| int status=pa_convertUTF16toUTF8(&utf16_start, utf16_end, (UTF8**)&result_end, (UTF8*)(result+(utf16_end-in)*6), strictConversion); | |
| if(status != conversionOK) | |
| throw Exception("utf-16 decode", 0, "utf conversion failed (%d)", status); | |
| *result_end='\0'; | |
| if(asked_charset.isUTF8()) | |
| return result; | |
| return Charset::transcode(result, pa_UTF8_charset, asked_charset).cstr(); | |
| } | |
| static bool is_latin(const char *in){ | |
| for(; *in; in++){ | |
| if ((unsigned char)(*in) > 0x7F) | |
| return false; | |
| } | |
| return true; | |
| } | |
| #define MAX_IDNA_LENGTH 256 | |
| const char *pa_idna_encode(const char *in, Charset& source_charset){ | |
| if(!in || is_latin(in)) | |
| return in; | |
| uint32_t utf32[MAX_IDNA_LENGTH]; | |
| uint32_t *utf32_end=utf32; | |
| String::C sIn(in,strlen(in)); | |
| if(!source_charset.isUTF8()) | |
| sIn=Charset::transcode(sIn, source_charset, pa_UTF8_charset); | |
| int status=pa_convertUTF8toUTF32((const UTF8**)&sIn.str, (const UTF8*)(sIn.str+sIn.length), &utf32_end, utf32+MAX_IDNA_LENGTH-1, strictConversion); | |
| if(status != conversionOK) | |
| throw Exception("idna encode", new String(in), "utf conversion failed (%d)", status); | |
| *utf32_end=0; | |
| char *result = (char *)pa_malloc(MAX_IDNA_LENGTH); | |
| status=pa_idna_to_ascii_4z(utf32, result, MAX_IDNA_LENGTH, 0); | |
| if(status != IDNA_SUCCESS) | |
| throw Exception("idna encode", new String(in), "encode failed: %s", pa_idna_strerror(status)); | |
| return result; | |
| } | |
| const char *pa_idna_decode(const char *in, Charset &asked_charset){ | |
| if(!in || !(*in)) | |
| return in; | |
| uint32_t utf32[MAX_IDNA_LENGTH]; | |
| const uint32_t *utf32_start=utf32; | |
| uint32_t *utf32_end; | |
| int status=pa_idna_to_unicode_4z(in, utf32, MAX_IDNA_LENGTH, 0); | |
| if(status != IDNA_SUCCESS) | |
| throw Exception("idna decode", new String(in), "decode failed: %s", pa_idna_strerror(status)); | |
| for(utf32_end=utf32; *utf32_end; utf32_end++); | |
| char *result = (char *)pa_malloc(MAX_IDNA_LENGTH); | |
| char *result_end = result; | |
| status=pa_convertUTF32toUTF8(&utf32_start, utf32_end, (UTF8**)&result_end, (UTF8*)(result+MAX_IDNA_LENGTH-1), strictConversion); | |
| if(status != conversionOK) | |
| throw Exception("idna decode", new String(in), "utf conversion failed (%d)", status); | |
| *result_end='\0'; | |
| if(!asked_charset.isUTF8()) | |
| result = (char *)Charset::transcode(result, pa_UTF8_charset, asked_charset).cstr(); | |
| return result; | |
| } | |
| /// must be last in this file | |
| #undef vsnprintf | |
| int pa_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 | |
| // http://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010 | |
| --s; | |
| // clients do not check for negative 's', feature: ignore such prints | |
| if((ssize_t)s<0) | |
| return 0; | |
| #ifdef _MSC_VER | |
| // win32: 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((size_t)r>s) | |
| r=s; | |
| #endif | |
| b[r]=0; | |
| return r; | |
| } | |
| int pa_snprintf(char* b, size_t s, const char* f, ...) { | |
| va_list l; | |
| va_start(l, f); | |
| int r=pa_vsnprintf(b, s, f, l); | |
| va_end(l); | |
| return r; | |
| } | |