Annotation of parser3/src/main/pa_common.C, revision 1.335
1.15 paf 1: /** @file
1.16 paf 2: Parser: commonly functions.
3:
1.334 moko 4: Copyright (c) 2000-2024 Art. Lebedev Studio (http://www.artlebedev.com)
1.327 moko 5: Authors: Konstantin Morshnev <moko@design.ru>, Alexandr Petrosian <paf@design.ru>
1.306 moko 6: */
1.210 paf 7:
1.1 paf 8: #include "pa_common.h"
1.4 paf 9: #include "pa_exception.h"
1.154 paf 10: #include "pa_hash.h"
1.14 paf 11: #include "pa_globals.h"
1.154 paf 12: #include "pa_charsets.h"
1.214 paf 13: #include "pa_http.h"
1.223 misha 14: #include "pa_request_charsets.h"
1.241 misha 15: #include "pa_request.h"
1.98 paf 16:
1.283 moko 17: #include "pa_idna.h"
18: #include "pa_convert_utf.h"
19:
1.273 moko 20: #ifdef _MSC_VER
1.276 moko 21: #include <windows.h>
1.273 moko 22: #include <direct.h>
23: #endif
24:
1.277 moko 25: #ifdef _MSC_VER
26: #define pa_mkdir(path, mode) _mkdir(path)
27: #else
28: #define pa_mkdir(path, mode) mkdir(path, mode)
29: #endif
30:
1.335 ! moko 31: volatile const char * IDENT_PA_COMMON_C="$Id: pa_common.C,v 1.334 2024/11/04 03:53:25 moko Exp $" IDENT_PA_COMMON_H IDENT_PA_HASH_H IDENT_PA_ARRAY_H IDENT_PA_STACK_H;
1.267 moko 32:
1.93 paf 33: // some maybe-undefined constants
34:
1.82 paf 35: #ifndef _O_TEXT
36: # define _O_TEXT 0
37: #endif
38: #ifndef _O_BINARY
39: # define _O_BINARY 0
1.47 paf 40: #endif
1.80 paf 41:
1.138 paf 42: #ifdef HAVE_FTRUNCATE
43: # define PA_O_TRUNC 0
44: #else
45: # ifdef _O_TRUNC
46: # define PA_O_TRUNC _O_TRUNC
47: # else
48: # error you must have either ftruncate function or _O_TRUNC bit declared
49: # endif
1.154 paf 50: #endif
1.176 paf 51:
1.154 paf 52: // defines for globals
53:
54: #define FILE_STATUS_NAME "status"
55:
56: // globals
57:
58: const String file_status_name(FILE_STATUS_NAME);
59:
1.305 moko 60: String sql_bind_name(SQL_BIND_NAME);
61: String sql_limit_name(PA_SQL_LIMIT_NAME);
62: String sql_offset_name(PA_SQL_OFFSET_NAME);
63: String sql_default_name(SQL_DEFAULT_NAME);
64: String sql_distinct_name(SQL_DISTINCT_NAME);
65: String sql_value_type_name(SQL_VALUE_TYPE_NAME);
66:
1.301 moko 67: // forwards
68:
69: const UTF16* pa_utf16_encode(const char* in, Charset& source_charset);
70:
1.154 paf 71: // functions
1.127 paf 72:
1.301 moko 73: #ifdef _MSC_VER
74:
75: int pa_stat(const char *pathname, struct stat *buffer){
76: const UTF16* utf16name=pa_utf16_encode(pathname, pa_thread_request().charsets.source());
77: return _wstat64((const wchar_t *)utf16name, buffer);
78: }
79:
80: int pa_open(const char *pathname, int flags, int mode){
81: const UTF16* utf16name=pa_utf16_encode(pathname, pa_thread_request().charsets.source());
82: return _wopen((const wchar_t *)utf16name, flags, mode);
83: }
84:
85: FILE *pa_fopen(const char *pathname, const char *mode){
86: const UTF16* utf16name=pa_utf16_encode(pathname, pa_thread_request().charsets.source());
87: const UTF16* utf16mode=pa_utf16_encode(mode, pa_thread_request().charsets.source());
88: return _wfopen((const wchar_t *)utf16name, (const wchar_t *)utf16mode);
89: }
90:
91: #endif
92:
1.206 paf 93: /// these options were handled but not checked elsewhere, now check them
1.239 misha 94: int pa_get_valid_file_options_count(HashStringValue& options) {
1.206 paf 95: int result=0;
96: if(options.get(PA_SQL_LIMIT_NAME))
97: result++;
98: if(options.get(PA_SQL_OFFSET_NAME))
99: result++;
100: if(options.get(PA_COLUMN_SEPARATOR_NAME))
101: result++;
102: if(options.get(PA_COLUMN_ENCLOSER_NAME))
103: result++;
1.223 misha 104: if(options.get(PA_CHARSET_NAME))
105: result++;
1.206 paf 106: return result;
107: }
108:
1.123 paf 109: #ifndef DOXYGEN
110: struct File_read_action_info {
1.154 paf 111: char **data; size_t *data_size;
1.318 moko 112: char* buf; uint64_t offset; size_t limit;
1.126 paf 113: };
1.123 paf 114: #endif
1.271 moko 115:
1.289 moko 116: static void file_read_action(struct stat& finfo, int f, const String& file_spec, void *context) {
1.310 moko 117: File_read_action_info& info = *static_cast<File_read_action_info *>(context);
1.326 moko 118: 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);
1.271 moko 119: if(to_read_size) {
1.320 moko 120: if(info.offset)
121: pa_lseek(f, info.offset, SEEK_SET); // seek never fails as POSIX allows the file offset to be set beyond the EOF
1.310 moko 122: *info.data = info.buf ? info.buf : (char *)pa_malloc_atomic(to_read_size+1);
123: ssize_t result = read(f, *info.data, to_read_size);
1.271 moko 124: if(result<0)
125: throw Exception("file.read", &file_spec, "read failed: %s (%d)", strerror(errno), errno);
1.310 moko 126: *info.data_size = result;
1.123 paf 127: } else { // empty file
1.209 paf 128: // for both, text and binary: for text we need that terminator, for binary we need nonzero pointer to be able to save such files
1.310 moko 129: *info.data = (char *)pa_malloc_atomic(1);
130: *(char*)(*info.data) = 0;
131: *info.data_size = 0;
1.123 paf 132: return;
133: }
1.126 paf 134: }
1.241 misha 135:
1.318 moko 136: File_read_result file_read_binary(const String& file_spec, bool fail_on_read_problem, char* buf, uint64_t offset, size_t limit) {
1.310 moko 137: File_read_result result = {false, 0, 0, 0};
138: File_read_action_info info = {&result.str, &result.length, buf, offset, limit};
1.309 moko 139:
1.310 moko 140: result.success = file_read_action_under_lock(file_spec, "read", file_read_action, &info, 0, fail_on_read_problem);
1.309 moko 141: return result;
142: }
143:
1.154 paf 144: File_read_result file_read(Request_charsets& charsets, const String& file_spec,
1.310 moko 145: bool as_text, HashStringValue *options,
1.229 misha 146: bool fail_on_read_problem,
1.310 moko 147: size_t offset = 0, size_t limit = 0, bool transcode_text_result = true) {
148: File_read_result result = {false, 0, 0, 0};
149: if(options){
150: int valid_options = pa_get_valid_file_options_count(*options);
151: if(valid_options != options->count())
1.262 misha 152: throw Exception(PARSER_RUNTIME, 0, CALLED_WITH_INVALID_OPTION);
1.241 misha 153: }
1.203 paf 154:
1.310 moko 155: File_read_action_info info = {&result.str, &result.length, 0, offset, limit};
1.161 paf 156:
1.310 moko 157: result.success = file_read_action_under_lock(file_spec, "read", file_read_action, &info, as_text, fail_on_read_problem);
1.223 misha 158:
1.241 misha 159: if(as_text){
160: if(result.success){
1.310 moko 161: Charset* asked_charset = 0;
162: if(options)
163: if(Value* vcharset_name = options->get(PA_CHARSET_NAME))
164: asked_charset = &pa_charsets.get(vcharset_name->as_string());
1.263 misha 165:
1.310 moko 166: asked_charset = pa_charsets.checkBOM(result.str, result.length, asked_charset);
1.287 moko 167:
1.263 misha 168: 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
1.310 moko 169: String::C body = String::C(result.str, result.length);
1.263 misha 170: body=Charset::transcode(body, *asked_charset, charsets.source());
1.236 misha 171:
1.310 moko 172: result.str = const_cast<char*>(body.str); // hacking a little
173: result.length = body.length;
1.131 paf 174: }
175: }
1.241 misha 176: if(result.length)
177: fix_line_breaks(result.str, result.length);
1.123 paf 178: }
1.241 misha 179:
180: return result;
181: }
182:
183: File_read_result file_load(Request& r, const String& file_spec,
1.310 moko 184: bool as_text, HashStringValue *options,
1.241 misha 185: bool fail_on_read_problem,
1.310 moko 186: bool transcode_text_result) {
187:
188: size_t offset = 0;
189: size_t limit = 0;
190:
191: if(options){
192: if(Value *voffset = (Value *)options->get(sql_offset_name))
193: offset = r.process(*voffset).as_int();
194: if(Value *vlimit = (Value *)options->get(sql_limit_name))
195: limit = r.process(*vlimit).as_int();
196: // no check on options count here
197: }
1.241 misha 198:
199: if(file_spec.starts_with("http://")) {
1.310 moko 200: if(offset || limit)
1.289 moko 201: throw Exception(PARSER_RUNTIME, 0, "offset and load options are not supported for HTTP:// file load");
1.241 misha 202:
203: // fail on read problem
1.310 moko 204: File_read_http_result http = pa_internal_file_read_http(r, file_spec, as_text, options, transcode_text_result);
205:
206: File_read_result result = {true, http.str, http.length, http.headers};
207: return result;
1.241 misha 208: } else
1.310 moko 209: return file_read(r.charsets, file_spec, as_text, options, fail_on_read_problem, offset, limit, transcode_text_result);
210: }
1.126 paf 211:
1.310 moko 212: char* file_read_text(Request_charsets& charsets, const String& file_spec, bool fail_on_read_problem) {
213: File_read_result file = file_read(charsets, file_spec, true, 0, fail_on_read_problem);
214: return file.success ? file.str : 0;
1.123 paf 215: }
216:
1.310 moko 217: char* file_load_text(Request& r, const String& file_spec, bool fail_on_read_problem, HashStringValue* options, bool transcode_result) {
218: File_read_result file = file_load(r, file_spec, true, options, fail_on_read_problem, transcode_result);
219: return file.success ? file.str : 0;
220: }
1.257 pretende 221:
1.154 paf 222: #ifdef PA_SAFE_MODE
1.259 misha 223: void check_safe_mode(struct stat finfo, const String& file_spec, const char* fname) {
1.154 paf 224: if(finfo.st_uid/*foreign?*/!=geteuid()
225: && finfo.st_gid/*foreign?*/!=getegid())
1.289 moko 226: throw Exception(PARSER_RUNTIME,
227: &file_spec,
228: "parser is in safe mode: reading files of foreign group and user disabled "
229: "[recompile parser with --disable-safe-mode configure option], "
230: "actual filename '%s', fuid(%d)!=euid(%d) or fgid(%d)!=egid(%d)",
231: fname, finfo.st_uid, geteuid(), finfo.st_gid, getegid()
232: );
1.259 misha 233: }
234: #else
235: void check_safe_mode(struct stat, const String&, const char*) {
236: }
1.257 pretende 237: #endif
1.259 misha 238:
1.257 pretende 239:
1.335 ! moko 240: bool file_read_action_under_lock(const String& file_spec, const char* action_name, File_read_action action, void *context,
! 241: bool as_text, bool fail_on_read_problem) {
1.149 paf 242:
1.335 ! moko 243: const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC);
1.33 paf 244: int f;
245:
246: // first open, next stat:
1.45 paf 247: // directory update of NTFS hard links performed on open.
1.33 paf 248: // ex:
249: // a.html:^test[] and b.html hardlink to a.html
250: // user inserts ! before ^test in a.html
1.126 paf 251: // directory entry of b.html in NTFS not updated at once,
1.35 paf 252: // they delay update till open, so we would receive "!^test[" string
253: // if would do stat, next open.
1.123 paf 254: // later: it seems, even this does not help sometimes
1.335 ! moko 255: if((f=pa_open(fname, O_RDONLY | (as_text ? _O_TEXT : _O_BINARY) ))>=0) {
1.123 paf 256: try {
1.335 ! moko 257: int pa_errno=pa_lock_shared_blocking(f);
! 258: if(pa_errno!=0)
! 259: throw Exception("file.lock", &file_spec, "shared lock failed: %s (%d), actual filename '%s'", strerror(pa_errno), pa_errno, fname);
1.123 paf 260:
1.124 paf 261: struct stat finfo;
1.298 moko 262: if(pa_fstat(f, &finfo)!=0)
1.124 paf 263: throw Exception("file.missing", // hardly possible: we just opened it OK
1.289 moko 264: &file_spec, "stat failed: %s (%d), actual filename '%s'", strerror(errno), errno, fname);
1.124 paf 265:
1.149 paf 266: check_safe_mode(finfo, file_spec, fname);
1.32 paf 267:
1.289 moko 268: action(finfo, f, file_spec, context);
1.123 paf 269: } catch(...) {
1.162 paf 270: pa_unlock(f);close(f);
1.123 paf 271: if(fail_on_read_problem)
1.154 paf 272: rethrow;
1.289 moko 273: return false;
1.123 paf 274: }
1.87 paf 275:
1.162 paf 276: pa_unlock(f);close(f);
1.72 parser 277: return true;
1.229 misha 278: } else {
1.118 paf 279: if(fail_on_read_problem)
1.289 moko 280: throw Exception(errno==EACCES ? "file.access" : (errno==ENOENT || errno==ENOTDIR || errno==ENODEV) ? "file.missing" : 0,
281: &file_spec, "%s failed: %s (%d), actual filename '%s'", action_name, strerror(errno), errno, fname);
1.118 paf 282: return false;
283: }
1.8 paf 284: }
285:
1.202 paf 286: void create_dir_for_file(const String& file_spec) {
1.324 moko 287: const char *str=file_spec.taint_cstr(String::L_FILE_SPEC);
288: if(str[0]){
289: const char *pos=str+1;
290: while((pos=strchr(pos,'/')) && pos[1]) { // to avoid trailing /, see #1166
291: pa_mkdir(pa_strdup(str,pos-str), 0775);
292: pos++;
293: }
1.63 parser 294: }
295: }
296:
1.335 ! moko 297: bool file_write_action_under_lock(const String& file_spec, const char* action_name, File_write_action action, void *context,
! 298: bool as_text, bool do_append, bool do_block, bool fail_on_lock_problem) {
! 299:
1.247 misha 300: const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC);
1.28 paf 301: int f;
1.80 paf 302: if(access(fname, W_OK)!=0) // no
1.126 paf 303: create_dir_for_file(file_spec);
1.50 paf 304:
1.335 ! moko 305: if((f=pa_open(fname, O_CREAT | O_RDWR | (as_text ? _O_TEXT : _O_BINARY) | (do_append ? O_APPEND : PA_O_TRUNC), 0664))>=0) {
! 306: int pa_errno=do_block ? pa_lock_exclusive_blocking(f) : pa_lock_exclusive_nonblocking(f);
! 307: if(pa_errno!=0) {
! 308: Exception e("file.lock", &file_spec, "shared lock failed: %s (%d), actual filename '%s'", strerror(pa_errno), pa_errno, fname);
! 309: close(f);
1.110 paf 310: if(fail_on_lock_problem)
311: throw e;
1.98 paf 312: return false;
313: }
1.96 paf 314:
1.158 paf 315: try {
1.254 misha 316: #if (defined(HAVE_FCHMOD) && defined(PA_SAFE_MODE))
317: struct stat finfo;
1.298 moko 318: if(pa_fstat(f, &finfo)==0 && finfo.st_mode & 0111)
1.254 misha 319: fchmod(f, finfo.st_mode & 0666/*clear executable bits*/); // backward: ignore errors if any
320: #endif
321: action(f, context);
1.158 paf 322: } catch(...) {
1.138 paf 323: #ifdef HAVE_FTRUNCATE
1.104 paf 324: if(!do_append)
1.332 moko 325: ftruncate(f, lseek(f, 0, SEEK_CUR)); // one cannot use O_TRUNC, read lower
1.138 paf 326: #endif
1.162 paf 327: pa_unlock(f);close(f);
1.154 paf 328: rethrow;
1.158 paf 329: }
1.80 paf 330:
1.138 paf 331: #ifdef HAVE_FTRUNCATE
1.104 paf 332: if(!do_append)
1.125 paf 333: ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering]
1.138 paf 334: #endif
1.162 paf 335: pa_unlock(f);close(f);
1.98 paf 336: return true;
1.80 paf 337: } else
1.289 moko 338: throw Exception(errno==EACCES ? "file.access" : 0, &file_spec, "%s failed: %s (%d), actual filename '%s'", action_name, strerror(errno), errno, fname);
1.96 paf 339: // here should be nothing, see rethrow above
340: }
341:
342: #ifndef DOXYGEN
343: struct File_write_action_info {
1.250 misha 344: const char* str;
345: size_t length;
1.126 paf 346: };
1.96 paf 347: #endif
1.271 moko 348:
1.96 paf 349: static void file_write_action(int f, void *context) {
1.126 paf 350: File_write_action_info& info=*static_cast<File_write_action_info *>(context);
1.154 paf 351: if(info.length) {
1.271 moko 352: ssize_t written=write(f, info.str, info.length);
1.116 paf 353: if(written<0)
1.271 moko 354: throw Exception("file.write", 0, "write failed: %s (%d)", strerror(errno), errno);
1.275 moko 355: if((size_t)written!=info.length)
1.271 moko 356: throw Exception("file.write", 0, "write failed: %u of %u bytes written", written, info.length);
1.113 paf 357: }
1.96 paf 358: }
1.271 moko 359:
1.96 paf 360: void file_write(
1.250 misha 361: Request_charsets& charsets,
362: const String& file_spec,
363: const char* data,
364: size_t size,
1.126 paf 365: bool as_text,
1.250 misha 366: bool do_append,
367: Charset* asked_charset) {
368:
369: if(as_text && asked_charset){
370: String::C body=String::C(data, size);
371: body=Charset::transcode(body, charsets.source(), *asked_charset);
372: data=body.str;
373: size=body.length;
374: };
375:
1.126 paf 376: File_write_action_info info={data, size};
1.225 misha 377:
1.98 paf 378: file_write_action_under_lock(
1.154 paf 379: file_spec,
1.225 misha 380: "write",
381: file_write_action,
382: &info,
1.154 paf 383: as_text,
384: do_append);
1.30 paf 385: }
386:
1.261 misha 387: static size_t get_dir(char* fname, size_t helper_length){
388: bool dir=false;
389: size_t pos=0;
390: for(pos=helper_length; pos; pos--){
391: char c=fname[pos-1];
392: if(c=='/' || c=='\\'){
393: fname[pos-1]=0;
394: dir=true;
395: } else if(dir) break;
396: }
397: return pos;
398: }
399:
1.312 moko 400: bool entry_exists(const char* fname, struct stat *afinfo) {
401: struct stat lfinfo;
402: bool result=pa_stat(fname, &lfinfo)==0;
403: if(afinfo)
404: *afinfo=lfinfo;
405: return result;
406: }
407:
408: bool entry_exists(const String& file_spec) {
409: return entry_exists(file_spec.taint_cstr(String::L_FILE_SPEC), 0);
410: }
411:
412: static bool entry_ifdir(char *fname, bool need_dir) {
1.261 misha 413: if(need_dir){
414: size_t size=strlen(fname);
415: while(size) {
416: char c=fname[size-1];
417: if(c=='/' || c=='\\')
418: fname[--size]=0;
419: else
420: break;
421: }
422: }
423:
424: struct stat finfo;
1.311 moko 425: if(entry_exists(fname, &finfo)) {
1.261 misha 426: bool is_dir=(finfo.st_mode&S_IFDIR) != 0;
427: return is_dir==need_dir;
428: }
429: return false;
430: }
431:
1.312 moko 432: static bool entry_ifdir(const String& file_spec, bool need_dir) {
433: return entry_ifdir(file_spec.taint_cstrm(String::L_FILE_SPEC), need_dir);
434: }
435:
1.63 parser 436: // throws nothing! [this is required in file_move & file_delete]
1.277 moko 437: static void rmdir(const String& file_spec, size_t pos_after) {
1.261 misha 438: char* dir_spec=file_spec.taint_cstrm(String::L_FILE_SPEC);
439: size_t length=strlen(dir_spec);
440: while( (length=get_dir(dir_spec, length)) && (length > pos_after) ){
1.274 moko 441: #ifdef _MSC_VER
1.312 moko 442: if(!entry_ifdir(dir_spec, true))
1.261 misha 443: break;
444: DWORD attrs=GetFileAttributes(dir_spec);
445: if(
446: (attrs==INVALID_FILE_ATTRIBUTES)
447: || !(attrs & FILE_ATTRIBUTE_DIRECTORY)
448: || (attrs & FILE_ATTRIBUTE_REPARSE_POINT)
449: )
450: break;
451: #endif
452: if( rmdir(dir_spec) )
453: break;
454: };
1.50 paf 455: }
1.239 misha 456:
1.269 misha 457: bool file_delete(const String& file_spec, bool fail_on_problem, bool keep_empty_dirs) {
1.247 misha 458: const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC);
1.282 moko 459: if(unlink(fname)!=0) {
1.164 paf 460: if(fail_on_problem)
1.289 moko 461: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
462: &file_spec, "unlink failed: %s (%d), actual filename '%s'", strerror(errno), errno, fname);
1.93 paf 463: else
464: return false;
1.282 moko 465: }
1.50 paf 466:
1.269 misha 467: if(!keep_empty_dirs)
468: rmdir(file_spec, 1);
469:
1.93 paf 470: return true;
1.60 parser 471: }
1.239 misha 472:
1.269 misha 473: void file_move(const String& old_spec, const String& new_spec, bool keep_empty_dirs) {
1.247 misha 474: const char* old_spec_cstr=old_spec.taint_cstr(String::L_FILE_SPEC);
475: const char* new_spec_cstr=new_spec.taint_cstr(String::L_FILE_SPEC);
1.63 parser 476:
1.126 paf 477: create_dir_for_file(new_spec);
1.63 parser 478:
1.60 parser 479: if(rename(old_spec_cstr, new_spec_cstr)!=0)
1.289 moko 480: throw Exception(errno==EACCES ? "file.access" : errno==ENOENT ? "file.missing" : 0,
481: &old_spec, "rename failed: %s (%d), actual filename '%s' to '%s'", strerror(errno), errno, old_spec_cstr, new_spec_cstr);
1.63 parser 482:
1.269 misha 483: if(!keep_empty_dirs)
484: rmdir(old_spec, 1);
1.31 paf 485: }
486:
1.51 paf 487:
1.215 paf 488: bool file_exist(const String& file_spec) {
1.312 moko 489: return entry_ifdir(file_spec, false);
1.51 paf 490: }
1.239 misha 491:
1.215 paf 492: bool dir_exists(const String& file_spec) {
1.312 moko 493: return entry_ifdir(file_spec, true);
1.65 parser 494: }
1.239 misha 495:
1.215 paf 496: const String* file_exist(const String& path, const String& name) {
1.154 paf 497: String& result=*new String(path);
1.270 moko 498: if(path.last_char() != '/')
499: result << "/";
1.154 paf 500: result << name;
1.215 paf 501: return file_exist(result)?&result:0;
1.43 paf 502: }
1.239 misha 503:
1.43 paf 504: bool file_executable(const String& file_spec) {
1.247 misha 505: return access(file_spec.taint_cstr(String::L_FILE_SPEC), X_OK)==0;
1.44 paf 506: }
507:
1.296 moko 508: bool file_stat(const String& file_spec, uint64_t& rsize, time_t& ratime, time_t& rmtime, time_t& rctime, bool fail_on_read_problem) {
1.247 misha 509: const char* fname=file_spec.taint_cstr(String::L_FILE_SPEC);
1.154 paf 510: struct stat finfo;
1.298 moko 511: if(pa_stat(fname, &finfo)!=0) {
1.64 parser 512: if(fail_on_read_problem)
1.289 moko 513: throw Exception("file.missing", &file_spec, "getting file size failed: %s (%d), real filename '%s'", strerror(errno), errno, fname);
1.64 parser 514: else
515: return false;
1.282 moko 516: }
1.58 parser 517: rsize=finfo.st_size;
1.299 moko 518: ratime=(time_t)finfo.st_atime;
519: rmtime=(time_t)finfo.st_mtime;
520: rctime=(time_t)finfo.st_ctime;
1.64 parser 521: return true;
1.18 paf 522: }
523:
1.313 moko 524: size_t check_file_size(uint64_t size, const String* file_spec){
1.319 moko 525: if(size > (uint64_t)pa_file_size_limit)
1.313 moko 526: throw Exception(PARSER_RUNTIME, file_spec, "content size of %.15g bytes exceeds the limit (%.15g bytes)", (double)size, (double)pa_file_size_limit);
1.300 moko 527: return (size_t)size;
528: }
529:
1.278 moko 530: /**
531: String related functions
532: */
533:
534: bool capitalized(const char* s){
535: bool upper=true;
536: for(const char* c=s; *c; c++){
537: if(*c != (upper ? toupper((unsigned char)*c) : tolower((unsigned char)*c)))
538: return false;
539: upper=strchr("-_ ", *c) != 0;
540: }
541: return true;
542: }
543:
544: const char* capitalize(const char* s){
545: if(!s || capitalized(s))
546: return s;
547:
548: char* result=pa_strdup(s);
549: if(result){
550: bool upper=true;
551: for(char* c=result; *c; c++){
552: *c=upper ? (char)toupper((unsigned char)*c) : (char)tolower((unsigned char)*c);
553: upper=strchr("-_ ", *c) != 0;
554: }
555: }
556: return (const char*)result;
557: }
558:
1.323 moko 559: char *str_lower(const char *s, size_t length){
560: char *result=pa_strdup(s, length);
1.290 moko 561: for(char* c=result; *c; c++)
562: *c=(char)tolower((unsigned char)*c);
563: return result;
564: }
565:
1.323 moko 566: char *str_upper(const char *s, size_t length){
567: char *result=pa_strdup(s, length);
1.290 moko 568: for(char* c=result; *c; c++)
569: *c=(char)toupper((unsigned char)*c);
570: return result;
571: }
572:
1.278 moko 573: void fix_line_breaks(char *str, size_t& length) {
574: //_asm int 3;
575: const char* const eob=str+length;
576: char* dest=str;
577: // fix DOS: \r\n -> \n
578: // fix Macintosh: \r -> \n
579: char* bol=str;
580: while(char* eol=(char*)memchr(bol, '\r', eob -bol)) {
581: size_t len=eol-bol;
582: if(dest!=bol)
583: memmove(dest, bol, len);
584: dest+=len;
585: *dest++='\n';
586:
587: if(&eol[1]<eob && eol[1]=='\n') { // \r, \n = DOS
588: bol=eol+2;
589: length--;
590: } else // \r, not \n = Macintosh
591: bol=eol+1;
592: }
593: // last piece without \r
594: if(dest!=bol)
595: memmove(dest, bol, eob-bol);
596: str[length]=0; // terminating
597: }
598:
599: /**
600: scans for @a delim[default \n] in @a *row_ref,
601: @return piece of line before it or end of string, if no @a delim found
602: assigns @a *row_ref to point right after delimiter if there were one
603: or to zero if no @a delim were found.
604: */
605:
1.126 paf 606: char* getrow(char* *row_ref, char delim) {
1.229 misha 607: char* result=*row_ref;
608: if(result) {
1.126 paf 609: *row_ref=strchr(result, delim);
1.8 paf 610: if(*row_ref)
611: *((*row_ref)++)=0;
612: else if(!*result)
613: return 0;
1.229 misha 614: }
615: return result;
1.8 paf 616: }
617:
1.126 paf 618: char* lsplit(char* string, char delim) {
1.229 misha 619: if(string) {
1.126 paf 620: char* v=strchr(string, delim);
1.8 paf 621: if(v) {
622: *v=0;
623: return v+1;
624: }
1.229 misha 625: }
626: return 0;
1.8 paf 627: }
628:
1.126 paf 629: char* lsplit(char* *string_ref, char delim) {
1.229 misha 630: char* result=*string_ref;
1.126 paf 631: char* next=lsplit(*string_ref, delim);
1.229 misha 632: *string_ref=next;
633: return result;
1.9 paf 634: }
635:
1.126 paf 636: char* rsplit(char* string, char delim) {
1.229 misha 637: if(string) {
1.126 paf 638: char* v=strrchr(string, delim);
1.18 paf 639: if(v) {
1.9 paf 640: *v=0;
641: return v+1;
642: }
1.229 misha 643: }
1.314 moko 644: return NULL;
645: }
646:
1.325 moko 647: void pa_strncpy(char *dst, const char *src, size_t n){
648: size_t left = n;
649:
650: if (left != 0 && src) {
651: while (--left != 0) {
652: if ((*dst++ = *src++) == '\0')
653: return;
654: }
655: }
656: if (n != 0)
657: *dst = '\0';
658: }
659:
1.314 moko 660: #define STRCAT_STEP(str, len) if(str) { memcpy(ptr, str, len); ptr += len; }
661:
662: char *pa_strcat(const char *a, const char *b, const char *c) {
663: size_t len_a = a ? strlen(a) : 0;
1.315 moko 664: size_t len_b = b ? strlen(b) : 0;
665: size_t len_c = c ? strlen(c) : 0;
1.314 moko 666: char *result=new(PointerFreeGC) char[len_a + len_b + len_c +1/*0*/];
667: char *ptr=result;
668: STRCAT_STEP(a, len_a);
669: STRCAT_STEP(b, len_b);
670: STRCAT_STEP(c, len_c);
671: *ptr='\0';
672: return result;
1.10 paf 673: }
674:
1.317 moko 675: const char *pa_filename(const char *path){
676: if(!path)
677: return NULL;
678: for(const char *c = path + strlen(path) - 1; c >= path; c--) {
679: if(*c == '/' || *c == '\\')
680: return c+1;
681: }
682: return path;
683: }
1.229 misha 684:
685: // format: %[flags][width][.precision]type http://msdn.microsoft.com/ru-ru/library/56e442dc(en-us,VS.80).aspx
686: // flags: '-', '+', ' ', '#', '0' http://msdn.microsoft.com/ru-ru/library/8aky45ct(en-us,VS.80).aspx
687: // width, precision: non negative decimal number
688: enum FormatType {
689: FormatInvalid,
690: FormatInt,
691: FormatUInt,
692: FormatDouble
693: };
1.272 moko 694: FormatType format_type(const char* fmt){
1.229 misha 695: enum FormatState {
696: Percent,
697: Flags,
698: Width,
699: Precision,
700: Done
701: } state=Percent;
702:
703: FormatType result=FormatInvalid;
704:
1.272 moko 705: const char* pos=fmt;
1.229 misha 706: while(char c=*(pos++)){
707: switch(state){
708: case Percent:
709: if(c=='%'){
710: state=Flags;
711: } else {
712: return FormatInvalid; // 1st char must be '%' only
713: }
714: break;
715: case Flags:
716: if(strchr("-+ #0", c)!=0){
717: break;
718: }
719: // go to the next step
720: case Width:
721: if(c=='.'){
722: state=Precision;
723: break;
724: }
725: // go to the next step
726: case Precision:
727: if(c>='0' && c<='9'){
728: if(state == Flags) state=Width; // no more flags
729: break;
730: } else if(c=='d' || c=='i'){
731: result=FormatInt;
732: } else if(strchr("feEgG", c)!=0){
733: result=FormatDouble;
734: } else if(strchr("uoxX", c)!=0){
735: result=FormatUInt;
736: } else {
737: return FormatInvalid; // invalid char
738: }
739: state=Done;
740: break;
741: case Done:
742: return FormatInvalid; // no chars allowed after 'type'
743: }
744: }
745: return result;
746: }
747:
748:
1.333 moko 749: const char* format_double(double value, const char* fmt) {
1.229 misha 750: char local_buf[MAX_NUMBER];
1.235 misha 751: int size=-1;
1.229 misha 752:
753: if(fmt && strlen(fmt)){
754: switch(format_type(fmt)){
755: case FormatDouble:
1.329 moko 756: size=snprintf(local_buf, sizeof(local_buf), fmt, value);
1.229 misha 757: break;
1.328 moko 758: case FormatUInt:
759: if(value >= 0){ // on Apple M1 (uint)<negative value> is 0
1.329 moko 760: size=snprintf(local_buf, sizeof(local_buf), fmt, clip2uint(value));
1.328 moko 761: break;
762: }
1.229 misha 763: case FormatInt:
1.329 moko 764: size=snprintf(local_buf, sizeof(local_buf), fmt, clip2int(value));
1.229 misha 765: break;
766: case FormatInvalid:
1.289 moko 767: throw Exception(PARSER_RUNTIME, 0, "Incorrect format string '%s' was specified.", fmt);
1.229 misha 768: }
769: } else
1.331 moko 770: return pa_itoa(clip2int(value));
1.229 misha 771:
772: if(size < 0 || size >= MAX_NUMBER-1){ // on win32 we manually reduce max size while printing
1.304 moko 773: throw Exception(PARSER_RUNTIME, 0, "Error occurred white executing snprintf with format string '%s'.", fmt);
1.229 misha 774: }
775:
1.235 misha 776: return pa_strdup(local_buf, (size_t)size);
1.12 paf 777: }
778:
1.36 paf 779: size_t stdout_write(const void *buf, size_t size) {
1.12 paf 780: #ifdef WIN32
1.187 paf 781: size_t to_write = size;
1.12 paf 782: do{
1.316 moko 783: int chunk_written=fwrite(buf, 1, min((size_t)8*0x400, size), stdout);
1.12 paf 784: if(chunk_written<=0)
785: break;
786: size-=chunk_written;
1.36 paf 787: buf=((const char*)buf)+chunk_written;
1.316 moko 788: } while(size>0);
1.12 paf 789:
1.316 moko 790: fflush(stdout);
1.187 paf 791: return to_write-size;
1.12 paf 792: #else
1.316 moko 793: size_t result=fwrite(buf, 1, size, stdout);
794: fflush(stdout);
795: return result;
1.12 paf 796: #endif
1.2 paf 797: }
1.14 paf 798:
1.229 misha 799: enum EscapeState {
800: EscapeRest,
801: EscapeFirst,
802: EscapeSecond,
803: EscapeUnicode
804: };
805:
1.236 misha 806: // @todo prescan for reduce required size (unescaped sting in 1 byte charset requires less memory usually)
1.258 misha 807: char* unescape_chars(const char* cp, int len, Charset* charset, bool js){
1.236 misha 808: char* s=new(PointerFreeGC) char[len+1]; // must be enough (%uXXXX==6 bytes, max utf-8 char length==6 bytes)
1.230 misha 809: char* dst=s;
1.229 misha 810: EscapeState escapeState=EscapeRest;
811: uint escapedValue=0;
812: int srcPos=0;
1.230 misha 813: short int jsCnt=0;
1.236 misha 814: while(srcPos<len){
1.229 misha 815: uchar c=(uchar)cp[srcPos];
1.258 misha 816: if(c=='%' || (c=='\\' && js)){
1.229 misha 817: escapeState=EscapeFirst;
818: } else {
819: switch(escapeState) {
820: case EscapeRest:
1.286 moko 821: if(c=='+' && !js){
1.230 misha 822: *dst++=' ';
1.229 misha 823: } else {
1.230 misha 824: *dst++=c;
1.229 misha 825: }
826: break;
827: case EscapeFirst:
1.232 misha 828: if(charset && c=='u'){
1.229 misha 829: // escaped unicode value: %u0430
830: jsCnt=0;
831: escapedValue=0;
832: escapeState=EscapeUnicode;
833: } else {
1.231 misha 834: if(isxdigit(c)){
1.229 misha 835: escapedValue=hex_value[c] << 4;
836: escapeState=EscapeSecond;
837: } else {
1.230 misha 838: *dst++=c;
1.229 misha 839: escapeState=EscapeRest;
840: }
841: }
842: break;
843: case EscapeSecond:
1.231 misha 844: if(isxdigit(c)){
1.229 misha 845: escapedValue+=hex_value[c];
1.230 misha 846: *dst++=(char)escapedValue;
1.229 misha 847: }
848: escapeState=EscapeRest;
849: break;
850: case EscapeUnicode:
1.231 misha 851: if(isxdigit(c)){
1.229 misha 852: escapedValue=(escapedValue << 4) + hex_value[c];
853: if(++jsCnt==4){
1.230 misha 854: // transcode utf8 char to client charset (we can lost some chars here)
1.232 misha 855: charset->store_Char((XMLByte*&)dst, (XMLCh)escapedValue, '?');
1.229 misha 856: escapeState=EscapeRest;
857: }
858: } else {
859: // not full unicode value
860: escapeState=EscapeRest;
861: }
862: break;
863: }
864: }
865:
866: srcPos++;
867: }
868:
1.230 misha 869: *dst=0; // zero-termination
1.229 misha 870: return s;
871: }
1.24 paf 872:
1.268 misha 873: char *search_stop(char*& current, char cstop_at) {
874: // sanity check
875: if(!current)
876: return 0;
877:
878: // skip leading WS
879: while(*current==' ' || *current=='\t')
880: current++;
881: if(!*current)
882: return current=0;
883:
884: char *result=current;
885: if(char *pstop_at=strchr(current, cstop_at)) {
886: *pstop_at=0;
887: current=pstop_at+1;
888: } else
889: current=0;
890: return result;
891: }
892:
1.24 paf 893: #ifdef WIN32
1.126 paf 894: void back_slashes_to_slashes(char* s) {
1.24 paf 895: if(s)
896: for(; *s; s++)
897: if(*s=='\\')
1.126 paf 898: *s='/';
1.24 paf 899: }
900: #endif
1.41 paf 901:
1.232 misha 902: size_t strpos(const char *str, const char *substr) {
903: const char *p = strstr(str, substr);
904: return (p==0)?STRING_NOT_FOUND:p-str;
905: }
906:
1.326 moko 907: size_t remove_crlf(char* start, char* end) {
1.226 misha 908: char* from=start;
909: char* to=start;
910: bool skip=false;
911: while(from < end){
912: switch(*from){
913: case '\n':
914: case '\r':
915: case '\t':
916: case ' ':
917: if(!skip){
918: *to=' ';
919: to++;
920: skip=true;
921: }
922: break;
923: default:
924: if(from != to)
925: *to=*from;
926: to++;
927: skip=false;
1.69 parser 928: }
1.226 misha 929: from++;
930: }
931: return to-start;
1.91 paf 932: }
933:
1.279 moko 934: const char* hex_digits="0123456789ABCDEF";
935:
1.278 moko 936: const char* hex_string(unsigned char* bytes, size_t size, bool upcase) {
937: char *bytes_hex=new(PointerFreeGC) char [size*2/*byte->hh*/+1/*for zero-teminator*/];
938: unsigned char *src=bytes;
939: unsigned char *end=bytes+size;
940: char *dest=bytes_hex;
941:
1.279 moko 942: const char *hex=upcase? hex_digits : "0123456789abcdef";
1.278 moko 943:
944: for(; src<end; src++) {
945: *dest++=hex[*src/0x10];
946: *dest++=hex[*src%0x10];
947: }
948: *dest=0;
949:
950: return bytes_hex;
951: }
1.91 paf 952:
1.321 moko 953: ssize_t file_block_read(const int f, void* buffer, const size_t size){
954: ssize_t nCount = read(f, buffer, size);
1.221 misha 955: if (nCount < 0)
1.289 moko 956: throw Exception("file.read", 0, "read failed: %s (%d)", strerror(errno), errno);
1.221 misha 957: return nCount;
958: }
959:
1.278 moko 960: static unsigned long crc32Table[256];
961: static void InitCrc32Table()
962: {
963: if(crc32Table[1] == 0){
964: // This is the official polynomial used by CRC32 in PKZip.
965: // Often times the polynomial shown reversed as 0x04C11DB7.
966: static const unsigned long dwPolynomial = 0xEDB88320;
967:
968: for(int i = 0; i < 256; i++)
969: {
970: unsigned long dwCrc = i;
971: for(int j = 8; j > 0; j--)
972: {
973: if(dwCrc & 1)
974: dwCrc = (dwCrc >> 1) ^ dwPolynomial;
975: else
976: dwCrc >>= 1;
977: }
978: crc32Table[i] = dwCrc;
979: }
980: }
981: }
982:
983: inline void CalcCrc32(const unsigned char byte, unsigned long &crc32)
984: {
985: crc32 = ((crc32) >> 8) ^ crc32Table[(byte) ^ ((crc32) & 0x000000FF)];
986: }
987:
988:
1.297 moko 989: unsigned long pa_crc32(const char *in, size_t in_size){
1.218 misha 990: unsigned long crc32=0xFFFFFFFF;
1.220 misha 991:
1.240 misha 992: InitCrc32Table();
1.239 misha 993: for(size_t i = 0; i<in_size; i++)
994: CalcCrc32(in[i], crc32);
1.220 misha 995:
1.218 misha 996: return ~crc32;
997: }
998:
1.289 moko 999: static void file_crc32_file_action(struct stat& finfo, int f, const String&, void *context) {
1.218 misha 1000: unsigned long& crc32=*static_cast<unsigned long *>(context);
1001: if(finfo.st_size) {
1002: InitCrc32Table();
1.220 misha 1003: int nCount=0;
1.218 misha 1004: do {
1.221 misha 1005: unsigned char buffer[FILE_BUFFER_SIZE];
1006: nCount = file_block_read(f, buffer, sizeof(buffer));
1.220 misha 1007: for(int i = 0; i < nCount; i++) CalcCrc32(buffer[i], crc32);
1008: } while(nCount > 0);
1.218 misha 1009: }
1010: }
1011:
1.297 moko 1012: unsigned long pa_crc32(const String& file_spec){
1.278 moko 1013: unsigned long crc32=0xFFFFFFFF;
1014: file_read_action_under_lock(file_spec, "crc32", file_crc32_file_action, &crc32);
1015: return ~crc32;
1016: }
1017:
1018: // content-type: xxx; charset=WE-NEED-THIS
1019: // content-type: xxx; charset="WE-NEED-THIS"
1020: // content-type: xxx; charset="WE-NEED-THIS";
1021: Charset* detect_charset(const char* content_type){
1022: if(content_type){
1.291 moko 1023: char* CONTENT_TYPE=str_upper(content_type);
1.278 moko 1024:
1025: if(const char* begin=strstr(CONTENT_TYPE, "CHARSET=")){
1026: begin+=8; // skip "CHARSET="
1027: char* end=0;
1028: if(*begin && (*begin=='"' || *begin =='\'')){
1029: char quote=*begin;
1030: begin++;
1031: end=(char*)strchr(begin, quote);
1032: }
1033: if(!end)
1034: end=(char*)strchr(begin, ';');
1035:
1036: if(end)
1037: *end=0; // terminator
1038:
1.295 moko 1039: return *begin ? &pa_charsets.get_direct(begin) : 0;
1.278 moko 1040: }
1041: }
1042: return 0;
1043: }
1044:
1.301 moko 1045: const UTF16* pa_utf16_encode(const char* in, Charset& source_charset){
1.302 moko 1046: if(!in)
1047: return 0;
1.301 moko 1048:
1.302 moko 1049: String::C sIn(in,strlen(in));
1.301 moko 1050:
1.302 moko 1051: UTF16* utf16=(UTF16*)pa_malloc_atomic(sIn.length*2+2);
1052: UTF16* utf16_end=utf16;
1.301 moko 1053:
1.302 moko 1054: if(!source_charset.isUTF8())
1055: sIn=Charset::transcode(sIn, source_charset, pa_UTF8_charset);
1.301 moko 1056:
1.302 moko 1057: int status=pa_convertUTF8toUTF16((const UTF8**)&sIn.str, (const UTF8*)(sIn.str+sIn.length), &utf16_end, utf16+sIn.length, strictConversion);
1058: if(status != conversionOK)
1059: throw Exception("utf-16 encode", new String(in), "utf-16 conversion failed (%d)", status);
1.301 moko 1060:
1.302 moko 1061: *utf16_end=0;
1.301 moko 1062:
1.302 moko 1063: return utf16;
1.301 moko 1064: }
1065:
1066: const char* pa_utf16_decode(const UTF16* in, Charset& asked_charset){
1067: if(!in)
1068: return 0;
1069:
1070: const UTF16* utf16_start=in;
1071: const UTF16* utf16_end;
1072:
1073: for(utf16_end=in; *utf16_end; utf16_end++);
1074:
1075: char *result = (char *)pa_malloc_atomic((utf16_end-in)*6+1);
1076: char *result_end = result;
1077:
1078: int status=pa_convertUTF16toUTF8(&utf16_start, utf16_end, (UTF8**)&result_end, (UTF8*)(result+(utf16_end-in)*6), strictConversion);
1079:
1080: if(status != conversionOK)
1081: throw Exception("utf-16 decode", 0, "utf conversion failed (%d)", status);
1082:
1083: *result_end='\0';
1084:
1.302 moko 1085: if(asked_charset.isUTF8())
1086: return result;
1.301 moko 1087:
1.302 moko 1088: return Charset::transcode(result, pa_UTF8_charset, asked_charset).cstr();
1.301 moko 1089: }
1.278 moko 1090:
1.283 moko 1091: static bool is_latin(const char *in){
1092: for(; *in; in++){
1093: if ((unsigned char)(*in) > 0x7F)
1094: return false;
1095: }
1096: return true;
1097: }
1098:
1099: #define MAX_IDNA_LENGTH 256
1100:
1.301 moko 1101: const char *pa_idna_encode(const char *in, Charset& source_charset){
1.283 moko 1102: if(!in || is_latin(in))
1103: return in;
1104:
1105: uint32_t utf32[MAX_IDNA_LENGTH];
1106: uint32_t *utf32_end=utf32;
1107:
1108: String::C sIn(in,strlen(in));
1109:
1110: if(!source_charset.isUTF8())
1.295 moko 1111: sIn=Charset::transcode(sIn, source_charset, pa_UTF8_charset);
1.283 moko 1112:
1113: int status=pa_convertUTF8toUTF32((const UTF8**)&sIn.str, (const UTF8*)(sIn.str+sIn.length), &utf32_end, utf32+MAX_IDNA_LENGTH-1, strictConversion);
1114: if(status != conversionOK)
1115: throw Exception("idna encode", new String(in), "utf conversion failed (%d)", status);
1116:
1117: *utf32_end=0;
1118:
1119: char *result = (char *)pa_malloc(MAX_IDNA_LENGTH);
1120: status=pa_idna_to_ascii_4z(utf32, result, MAX_IDNA_LENGTH, 0);
1121: if(status != IDNA_SUCCESS)
1122: throw Exception("idna encode", new String(in), "encode failed: %s", pa_idna_strerror(status));
1123:
1124: return result;
1125: }
1126:
1127: const char *pa_idna_decode(const char *in, Charset &asked_charset){
1128: if(!in || !(*in))
1129: return in;
1130:
1131: uint32_t utf32[MAX_IDNA_LENGTH];
1132: const uint32_t *utf32_start=utf32;
1133: uint32_t *utf32_end;
1134:
1135: int status=pa_idna_to_unicode_4z(in, utf32, MAX_IDNA_LENGTH, 0);
1136: if(status != IDNA_SUCCESS)
1137: throw Exception("idna decode", new String(in), "decode failed: %s", pa_idna_strerror(status));
1138:
1139: for(utf32_end=utf32; *utf32_end; utf32_end++);
1140:
1141: char *result = (char *)pa_malloc(MAX_IDNA_LENGTH);
1142: char *result_end = result;
1143:
1144: status=pa_convertUTF32toUTF8(&utf32_start, utf32_end, (UTF8**)&result_end, (UTF8*)(result+MAX_IDNA_LENGTH-1), strictConversion);
1145:
1146: if(status != conversionOK)
1147: throw Exception("idna decode", new String(in), "utf conversion failed (%d)", status);
1148:
1149: *result_end='\0';
1150:
1151: if(!asked_charset.isUTF8())
1.295 moko 1152: result = (char *)Charset::transcode(result, pa_UTF8_charset, asked_charset).cstr();
1.283 moko 1153:
1154: return result;
1155: }
1.292 moko 1156: /// must be last in this file
1157: #undef vsnprintf
1158: int pa_vsnprintf(char* b, size_t s, const char* f, va_list l) {
1159: if(!s)
1160: return 0;
1161:
1162: int r;
1163: // note: on win32 & maybe somewhere else
1164: // vsnprintf do not writes terminating 0 in 'buffer full' case, reducing
1165: // http://stackoverflow.com/questions/2915672/snprintf-and-visual-studio-2010
1166: --s;
1167:
1168: // clients do not check for negative 's', feature: ignore such prints
1169: if((ssize_t)s<0)
1170: return 0;
1171:
1172: #ifdef _MSC_VER
1173: // win32: if the number of bytes to write exceeds buffer, then count bytes are written and -1 is returned
1174: r=_vsnprintf(b, s, f, l);
1175: if(r<0)
1176: r=s;
1177: #else
1178: r=vsnprintf(b, s, f, l);
1179: /*
1180: solaris: man vsnprintf
1181:
1182: The snprintf() function returns the number of characters
1183: formatted, that is, the number of characters that would have
1184: been written to the buffer if it were large enough. If the
1185: value of n is 0 on a call to snprintf(), an unspecified
1186: value less than 1 is returned.
1187: */
1188:
1189: if(r<0)
1190: r=0;
1191: else if((size_t)r>s)
1192: r=s;
1193: #endif
1194: b[r]=0;
1195: return r;
1196: }
1197:
1198: int pa_snprintf(char* b, size_t s, const char* f, ...) {
1199: va_list l;
1200: va_start(l, f);
1201: int r=pa_vsnprintf(b, s, f, l);
1202: va_end(l);
1203: return r;
1204: }
1205:
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