Annotation of parser3/src/main/pa_common.C, revision 1.132
1.15 paf 1: /** @file
1.16 paf 2: Parser: commonly functions.
3:
1.102 paf 4: Copyright(c) 2001, 2002 ArtLebedev Group (http://www.artlebedev.com)
1.101 paf 5: Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
1.111 paf 6: */
1.16 paf 7:
1.132 ! paf 8: static const char* IDENT_COMMON_C="$Date: 2002/11/26 12:39:44 $";
1.1 paf 9:
10: #include "pa_common.h"
1.4 paf 11: #include "pa_exception.h"
1.14 paf 12: #include "pa_globals.h"
1.126 paf 13: #include "pa_hash.h"
14: #include "pa_vstring.h"
1.1 paf 15:
1.98 paf 16: #ifdef WIN32
17: # include <windows.h>
1.126 paf 18: #else
19: # define closesocket close
1.98 paf 20: #endif
21:
1.93 paf 22: // some maybe-undefined constants
23:
1.82 paf 24: #ifndef _O_TEXT
25: # define _O_TEXT 0
26: #endif
27: #ifndef _O_BINARY
28: # define _O_BINARY 0
1.47 paf 29: #endif
1.80 paf 30:
1.93 paf 31: // locking constants
32:
1.99 paf 33: #ifdef HAVE_FLOCK
34:
35: static int lock_shared_blocking(int fd) { return flock(fd, LOCK_SH); }
36: static int lock_exclusive_blocking(int fd) { return flock(fd, LOCK_EX); }
37: static int lock_exclusive_nonblocking(int fd) { return flock(fd, LOCK_EX || LOCK_NB); }
38: static int unlock(int fd) { return flock(fd, LOCK_UN); }
39:
1.98 paf 40: #else
1.99 paf 41: #ifdef HAVE__LOCKING
1.98 paf 42:
1.126 paf 43: #define FLOCK(operation) lseek(fd, 0, SEEK_SET); return _locking(fd, operation, 1)
1.99 paf 44: static int lock_shared_blocking(int fd) { FLOCK(_LK_LOCK); }
45: static int lock_exclusive_blocking(int fd) { FLOCK(_LK_LOCK); }
46: static int lock_exclusive_nonblocking(int fd) { FLOCK(_LK_NBLCK); }
47: static int unlock(int fd) { FLOCK(_LK_UNLCK); }
1.93 paf 48:
1.99 paf 49: #else
50: #ifdef HAVE_FCNTL
1.93 paf 51:
1.126 paf 52: #define FLOCK(cmd, arg) struct flock ls={arg, SEEK_SET}; return fcntl(fd, cmd, &ls)
1.99 paf 53: static int lock_shared_blocking(int fd) { FLOCK(F_SETLKW, F_RDLCK); }
54: static int lock_exclusive_blocking(int fd) { FLOCK(F_SETLKW, F_WRLCK); }
55: static int lock_exclusive_nonblocking(int fd) { FLOCK(F_SETLK, F_RDLCK); }
56: static int unlock(int fd) { FLOCK(F_SETLK, F_UNLCK); }
1.93 paf 57:
58: #else
59: #ifdef HAVE_LOCKF
1.99 paf 60:
1.126 paf 61: #define FLOCK(fd, operation) lseek(fd, 0, SEEK_SET); return lockf(fd, operation, 1)
1.99 paf 62: static int lock_shared_blocking(int fd) { FLOCK(F_LOCK); } // on intel solaris man doesn't have doc on shared blocking
63: static int lock_exclusive_blocking(int fd) { FLOCK(F_LOCK); }
64: static int lock_exclusive_nonblocking(int fd) { FLOCK(F_TLOCK); }
65: static int unlock(int fd) { FLOCK(F_TLOCK); }
66:
1.93 paf 67: #else
1.99 paf 68:
69: #error unable to find file locking func
70:
71: #endif
1.93 paf 72: #endif
73: #endif
74: #endif
75:
1.127 paf 76: #define DEFAULT_USER_AGENT "parser3"
77:
78:
1.126 paf 79:
80: static char* strnchr(char* buf, size_t size, char c) {
1.103 paf 81: // sanity check
82: if(!buf)
83: return 0;
84:
1.126 paf 85: for(; size-->0; buf++) {
1.86 paf 86: if(*buf==c)
87: return buf;
88: }
89:
90: return 0;
91: }
92:
1.126 paf 93: void fix_line_breaks(char* buf, size_t& size) {
1.87 paf 94: //_asm int 3;
1.126 paf 95: const char* const eob=buf+size;
96: char* dest=buf;
1.72 parser 97: // fix DOS: \r\n -> \n
98: // fix Macintosh: \r -> \n
1.126 paf 99: char* bol=buf;
100: while(char* eol=strnchr(bol, eob -bol, '\r')) {
1.72 parser 101: size_t len=eol-bol;
102: if(dest!=bol)
1.126 paf 103: memcpy(dest, bol, len);
1.72 parser 104: dest+=len;
1.126 paf 105: *dest++='\n';
1.72 parser 106:
1.126 paf 107: if(&eol[1]<eob && eol[1]=='\n') { // \r, \n = DOS
1.72 parser 108: bol=eol+2;
1.126 paf 109: size--;
110: } else // \r, not \n = Macintosh
1.72 parser 111: bol=eol+1;
112: }
113: // last piece without \r, including terminating 0
114: if(dest!=bol)
1.126 paf 115: memcpy(dest, bol, eob-bol);
1.72 parser 116: }
1.18 paf 117:
1.126 paf 118: char* file_read_text(Pool& pool, const String& file_spec,
119: bool fail_on_read_problem,
120: Hash *params, Hash** out_fields) {
1.72 parser 121: void *result; size_t size;
1.126 paf 122: return file_read(pool, file_spec, result, size, true, params, out_fields, fail_on_read_problem)?(char *)result:0;
123: }
124:
125: //http request stuff
126: /* ************************ http stuff *********************** */
127:
128: static bool set_addr(struct sockaddr_in *addr, const char* host, const short port){
129: memset(addr, 0, sizeof(*addr));
130: addr->sin_family=AF_INET;
131: addr->sin_port=htons(port);
132: if(host) {
133: if(struct hostent *hostIP=gethostbyname(host))
134: memcpy(&addr->sin_addr, hostIP->h_addr, hostIP->h_length);
135: else
136: return false;
137: } else
138: addr->sin_addr.s_addr=INADDR_ANY;
139: return true;
140: }
141:
142: static void http_read_response(String& response, int sock){
1.130 paf 143: bool check_status=true;
144: ssize_t EOLat=0;
1.126 paf 145: while(true) {
146: char *buf=(char *)response.pool().malloc(MAX_STRING);
147: ssize_t size=recv(sock, buf, MAX_STRING, 0);
148: if(size<=0)
149: break;
1.130 paf 150: response.APPEND_TAINTED(buf, size, "remote HTTP server response", 0);
151: if(check_status && (EOLat=response.pos("\r\n", 2))>=0) { // checking status in first response
152: check_status=false;
153:
154: const String& status_line=response.mid(0, (size_t)EOLat);
155: Array astatus(response.pool());
156: size_t pos_after_ref=0; status_line.split(astatus, &pos_after_ref, " ", 1);
157: const String* status_code=astatus.get_string(1);
158:
159: if(!status_code || *status_code!="200")
160: throw Exception("http.status",
161: status_code,
162: "invalid HTTP response status");
163: }
1.126 paf 164: }
1.130 paf 165: if(check_status)
166: throw Exception("http.response",
167: 0,
168: "bad response from host - no status found (size=%lu)", response.size());
1.126 paf 169: }
170:
171: /* ********************** request *************************** */
172:
173: #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP)
174: # define WE_CAN_USE_ALARM
175: #endif
176:
177: #ifdef WE_CAN_USE_ALARM
178: static sigjmp_buf timeout_env;
179: static void timeout_handler(int sig){
180: siglongjmp(timeout_env, 1);
181: }
182: #endif
183:
184: static void http_request(String& response,
185: const String *origin_string,
186: const char* host, int port,
187: const char* request,
188: int timeout){
189: if(!host)
190: throw Exception("http.host",
191: origin_string,
192: "zero hostname"); //never
193:
194: #ifdef WE_CAN_USE_ALARM
195: signal(SIGALRM, timeout_handler);
196: #endif
197: int sock=-1;
198: try {
199: #ifdef WE_CAN_USE_ALARM
200: if(sigsetjmp(timeout_env, 1))
201: throw Exception("http.timeout",
202: origin_string,
203: "timeout occured while retrieving document");
204: else {
205: alarm(timeout);
206: #endif
207: struct sockaddr_in dest;
208:
209: if(!set_addr(&dest, host, port))
210: throw Exception("http.host",
211: origin_string,
1.127 paf 212: "can not resolve hostname \"%s\"", host);
1.126 paf 213:
214: if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0)
215: throw Exception("http.connect",
216: origin_string,
1.127 paf 217: "can not make socket: %s (%d)", strerror(errno), errno);
1.126 paf 218: if(connect(sock, (struct sockaddr *)&dest, sizeof(dest)))
219: throw Exception("http.connect",
220: origin_string,
1.127 paf 221: "can not connect to host \"%s\": %s (%d)", host, strerror(errno), errno);
1.126 paf 222: size_t request_size=strlen(request);
223: if(send(sock, request, request_size, 0)!=(ssize_t)request_size)
224: throw Exception("http.connect",
225: origin_string,
1.127 paf 226: "error sending request: %s (%d)", strerror(errno), errno);
1.126 paf 227:
228: http_read_response(response, sock);
229: if(sock>=0)
230: closesocket(sock);
231: #ifdef WE_CAN_USE_ALARM
232: }
233: #endif
234: } catch(...) {
235: if(sock>=0)
236: closesocket(sock);
237: #ifdef WE_CAN_USE_ALARM
238: alarm(0);
239: #endif
240: /*re*/throw;
241: }
242: }
243:
1.127 paf 244: #ifndef DOXYGEN
245: struct Http_pass_header_info {
246: String* request;
247: bool user_agent_specified;
248: };
249: #endif
250: static void http_pass_header(const Hash::Key& key, Hash::Val *value, void *info)
1.126 paf 251: {
1.127 paf 252: Http_pass_header_info& i=*static_cast<Http_pass_header_info *>(info);
253: Pool& pool=i.request->pool();
254:
255: *(i.request)<<key<<": "<<*(static_cast<Value *>(value))->get_string()<<"\n";
256:
257: if(key.change_case(pool, String::CC_UPPER)=="USER-AGENT")
258: i.user_agent_specified=true;
1.126 paf 259: }
260: static void file_read_http(Pool& pool, const String& file_spec,
261: void*& data, size_t& data_size,
1.127 paf 262: Hash *options=0, Hash** out_fields=0) {
1.126 paf 263: char host[MAX_STRING];
1.129 paf 264: const char* uri;
1.126 paf 265: int port;
266: const char* method="GET";
267: int timeout=2;
1.127 paf 268: Value *vheaders=0;
1.126 paf 269:
270: char* connect_string=file_spec.cstr(String::UL_UNSPECIFIED);
271: if(strncmp(connect_string, "http://", 7)!=0)
272: throw Exception(0,
273: &file_spec,
274: "does not start with http://"); //never
275: connect_string+=7;
276:
277: strncpy(host, connect_string, sizeof(host)-1); host[sizeof(host)-1]=0;
278: char* host_uri=lsplit(host, '/');
279: uri=host_uri?connect_string+(host_uri-1-host):"/";
280: char* port_cstr=lsplit(host, ':');
281: char* error_pos=0;
282: port=port_cstr?strtol(port_cstr, &error_pos, 0):80;
283:
1.127 paf 284: if(options) {
285: int valid_options=0;
286: if(Value *vmethod=static_cast<Value *>(options->get(*http_method_name))) {
287: valid_options++;
288: method=vmethod->as_string().cstr();
289: }
290: if(Value *vtimeout=static_cast<Value *>(options->get(*http_timeout_name))) {
291: valid_options++;
292: timeout=vtimeout->as_int();
293: }
294: if(vheaders=static_cast<Value *>(options->get(*http_headers_name))) {
295: valid_options++;
296: }
297: if(valid_options!=options->size())
298: throw Exception("parser.runtime",
299: 0,
300: "invalid option passed");
1.126 paf 301: }
302:
303: //making request
1.127 paf 304: String request(pool);
1.126 paf 305: request<< method <<" "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n";
1.127 paf 306: bool user_agent_specified=false;
307: if(vheaders && !vheaders->is_string()) { // allow empty
308: if(Hash *headers=vheaders->get_hash(&file_spec)) {
309: Http_pass_header_info info={&request};
310: headers->for_each(http_pass_header, &info);
311: user_agent_specified=info.user_agent_specified;
312: } else
313: throw Exception("parser.runtime",
314: &file_spec,
315: "headers param must be hash");
316: };
317: if(!user_agent_specified) // defaulting
318: request << "user-agent: " DEFAULT_USER_AGENT "\n";
1.126 paf 319: request<<"\n";
320:
321: //sending request
322: String response(pool);
323: http_request(response,
324: &file_spec, host, port, request.cstr(String::UL_UNSPECIFIED), timeout);
325:
326: //processing results
327: int pos=response.pos("\r\n\r\n", 4);
328: if(pos<1){
329: throw Exception("http.response",
330: &file_spec,
331: "bad response from host - no headers found");
332: }
333: String header_block=response.mid(0, pos);
334: String body=response.mid(pos+4, response.size());
335:
336: Array aheaders(pool);
337: Hash& headers=*new(pool) Hash(pool);
338: size_t pos_after_ref=0;
339: header_block.split(aheaders, &pos_after_ref, "\r\n", 2);
340:
341: //processing status code
342: const String *status_line=aheaders.get_string(0);
343: if(!status_line){
344: throw Exception("http.response",
345: &file_spec,
346: "bad response from host - no status line ");
347: }
348: //processing headers
349: for(int i=1;i<aheaders.size();i++) {
350: if(const String *line=aheaders.get_string(i)) {
351: pos=line->pos(": ", 2);
352: if(pos<1)
353: throw Exception("http.response",
354: &file_spec,
355: "bad response from host - bad header \"%s\"", line->cstr());
356:
1.128 paf 357: headers.put(
358: line->mid(0, pos).change_case(pool, String::CC_UPPER),
359: new(pool) VString(line->mid(pos+2, line->size())));
1.126 paf 360: } else
361: throw Exception("http.response",
362: &file_spec,
363: "bad response from host - bad headers \"%s\"", header_block.cstr());
364: }
365:
366: // output response
367: data=body.cstr(); data_size=body.size();
1.130 paf 368: if(out_fields)
1.126 paf 369: *out_fields=&headers;
1.34 paf 370: }
1.123 paf 371:
372: #ifndef DOXYGEN
373: struct File_read_action_info {
374: void **data; size_t *data_size;
1.126 paf 375: };
1.123 paf 376: #endif
1.126 paf 377: static void file_read_action(Pool& pool,
378: struct stat& finfo,
1.123 paf 379: int f,
1.126 paf 380: const String& file_spec, const char* fname, bool as_text,
1.123 paf 381: void *context) {
1.126 paf 382: File_read_action_info& info=*static_cast<File_read_action_info *>(context);
1.123 paf 383: if(size_t to_read_size=(size_t)finfo.st_size) {
1.126 paf 384: *info.data=pool.malloc(to_read_size+(as_text?1:0), 3);
385: *info.data_size=(size_t)read(f, *info.data, to_read_size);
1.123 paf 386:
387: if(ssize_t(*info.data_size)<0 || *info.data_size>to_read_size)
1.126 paf 388: throw Exception(0,
1.123 paf 389: &file_spec,
390: "read failed: actually read %lu bytes count not in [0..%lu] valid range",
1.126 paf 391: *info.data_size, to_read_size);
1.123 paf 392: } else { // empty file
393: if(as_text) {
1.126 paf 394: *info.data=pool.malloc(1);
1.123 paf 395: *(char*)(*info.data)=0;
396: } else
397: *info.data=0;
398: *info.data_size=0;
399: return;
400: }
1.126 paf 401: }
402: bool file_read(Pool& pool, const String& file_spec,
403: void*& data, size_t& data_size,
404: bool as_text, Hash *params, Hash** out_fields,
405: bool fail_on_read_problem) {
406: bool result;
407: if(file_spec.starts_with("http://", 7)) {
408: // fail on read problem
409: file_read_http(pool, file_spec, data, data_size, params, out_fields);
410: result=true;
411: } else {
412: File_read_action_info info={&data, &data_size};
413: result=file_read_action_under_lock(pool, file_spec,
414: "read", file_read_action, &info,
415: as_text, fail_on_read_problem);
416: }
1.123 paf 417:
1.126 paf 418: if(result && as_text) {
1.131 paf 419: // UTF-8 signature: EF BB BF
420: if(data_size>=3) {
421: char *in=(char *)data;
422: if((in[0] == '\xEF') && (in[1] == '\xBB') &&
423: (in[2] == '\xBF')) {
424: data=in+3; data_size-=3;// skip prefix
425: }
426: }
427:
1.126 paf 428: fix_line_breaks((char *)(data), data_size);
1.123 paf 429: // note: after fixing
1.126 paf 430: ((char*&)(data))[data_size]=0;
1.123 paf 431: }
1.126 paf 432:
433: return result;
1.123 paf 434: }
435:
436: bool file_read_action_under_lock(Pool& pool, const String& file_spec,
1.126 paf 437: const char* action_name, File_read_action action, void *context,
438: bool as_text,
1.123 paf 439: bool fail_on_read_problem) {
1.126 paf 440: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.33 paf 441: int f;
442:
443: // first open, next stat:
1.45 paf 444: // directory update of NTFS hard links performed on open.
1.33 paf 445: // ex:
446: // a.html:^test[] and b.html hardlink to a.html
447: // user inserts ! before ^test in a.html
1.126 paf 448: // directory entry of b.html in NTFS not updated at once,
1.35 paf 449: // they delay update till open, so we would receive "!^test[" string
450: // if would do stat, next open.
1.123 paf 451: // later: it seems, even this does not help sometimes
1.98 paf 452: if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) {
1.123 paf 453: try {
454: if(lock_shared_blocking(f)!=0)
1.126 paf 455: throw Exception("file.lock",
1.123 paf 456: &file_spec,
457: "shared lock failed: %s (%d), actual filename '%s'",
1.126 paf 458: strerror(errno), errno, fname);
1.123 paf 459:
1.124 paf 460: struct stat finfo;
461: if(stat(fname, &finfo)!=0)
462: throw Exception("file.missing", // hardly possible: we just opened it OK
463: &file_spec,
464: "stat failed: %s (%d), actual filename '%s'",
1.126 paf 465: strerror(errno), errno, fname);
1.124 paf 466:
1.105 paf 467: #ifdef NO_FOREIGN_GROUP_FILES
1.132 ! paf 468: if(finfo.st_gid/*foreign?*/!=getegid())
1.126 paf 469: throw Exception("parser.runtime",
470: &file_spec,
1.123 paf 471: "parser reading files of foreign group disabled [recompile parser without --disable-foreign-group-files configure option], actual filename '%s'",
1.126 paf 472: fname);
1.105 paf 473: #endif
1.32 paf 474:
1.126 paf 475: action(pool, finfo, f, file_spec, fname, as_text, context);
1.123 paf 476: } catch(...) {
1.126 paf 477: unlock(f);close(f);
1.123 paf 478: if(fail_on_read_problem)
479: /*re*/throw;
480: return false;
481: }
1.87 paf 482:
1.126 paf 483: unlock(f);close(f);
1.72 parser 484: return true;
1.118 paf 485: } else {
486: if(fail_on_read_problem)
1.126 paf 487: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.118 paf 488: &file_spec,
1.123 paf 489: "%s failed: %s (%d), actual filename '%s'",
1.126 paf 490: action_name, strerror(errno), errno, fname);
1.118 paf 491: return false;
492: }
1.8 paf 493: }
494:
1.63 parser 495: static void create_dir_for_file(const String& file_spec) {
496: size_t pos_after=1;
497: int pos_before;
498: while((pos_before=file_spec.pos("/", 1, pos_after))>=0) {
1.126 paf 499: mkdir(file_spec.mid(0, pos_before).cstr(String::UL_FILE_SPEC), 0775);
1.63 parser 500: pos_after=pos_before+1;
501: }
502: }
503:
1.98 paf 504: bool file_write_action_under_lock(
1.28 paf 505: const String& file_spec,
1.126 paf 506: const char* action_name, File_write_action action, void *context,
507: bool as_text,
508: bool do_append,
509: bool do_block,
1.110 paf 510: bool fail_on_lock_problem) {
1.126 paf 511: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.28 paf 512: int f;
1.80 paf 513: if(access(fname, W_OK)!=0) // no
1.126 paf 514: create_dir_for_file(file_spec);
1.50 paf 515:
1.80 paf 516: if((f=open(fname,
517: O_CREAT|O_RDWR
518: |(as_text?_O_TEXT:_O_BINARY)
1.122 paf 519: |(do_append?O_APPEND:0), 0664))>=0) {
1.99 paf 520: if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) {
1.126 paf 521: Exception e("file.lock",
1.110 paf 522: &file_spec,
523: "shared lock failed: %s (%d), actual filename '%s'",
1.126 paf 524: strerror(errno), errno, fname);
525: close(f);
1.110 paf 526: if(fail_on_lock_problem)
527: throw e;
1.98 paf 528: return false;
529: }
1.96 paf 530:
531: try {
1.126 paf 532: action(f, context);
1.96 paf 533: } catch(...) {
1.104 paf 534: if(!do_append)
1.125 paf 535: ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower
1.126 paf 536: unlock(f);close(f);
1.96 paf 537: /*re*/throw;
538: }
1.80 paf 539:
1.104 paf 540: if(!do_append)
1.125 paf 541: ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering]
1.126 paf 542: unlock(f);close(f);
1.98 paf 543: return true;
1.80 paf 544: } else
1.126 paf 545: throw Exception(errno==EACCES?"file.access":0,
1.80 paf 546: &file_spec,
1.96 paf 547: "%s failed: %s (%d), actual filename '%s'",
1.126 paf 548: action_name, strerror(errno), errno, fname);
1.96 paf 549: // here should be nothing, see rethrow above
550: }
551:
552: #ifndef DOXYGEN
553: struct File_write_action_info {
554: const void *data; size_t size;
1.126 paf 555: };
1.96 paf 556: #endif
557: static void file_write_action(int f, void *context) {
1.126 paf 558: File_write_action_info& info=*static_cast<File_write_action_info *>(context);
1.113 paf 559: if(info.size) {
1.126 paf 560: int written=write(f, info.data, info.size);
1.116 paf 561: if(written<0)
1.126 paf 562: throw Exception(0,
563: 0,
564: "write failed: %s (%d)", strerror(errno), errno);
1.113 paf 565: }
1.96 paf 566: }
567: void file_write(
568: const String& file_spec,
569: const void *data, size_t size,
1.126 paf 570: bool as_text,
1.96 paf 571: bool do_append) {
1.126 paf 572: File_write_action_info info={data, size};
1.98 paf 573: file_write_action_under_lock(
1.96 paf 574: file_spec,
1.126 paf 575: "write", file_write_action, &info,
576: as_text,
577: do_append);
1.30 paf 578: }
579:
1.63 parser 580: // throws nothing! [this is required in file_move & file_delete]
1.50 paf 581: static void rmdir(const String& file_spec, size_t pos_after) {
582: int pos_before;
583: if((pos_before=file_spec.pos("/", 1, pos_after))>=0)
1.126 paf 584: rmdir(file_spec, pos_before+1);
1.50 paf 585:
1.126 paf 586: rmdir(file_spec.mid(0, pos_after-1/* / */).cstr(String::UL_FILE_SPEC));
1.50 paf 587: }
1.95 paf 588: bool file_delete(const String& file_spec, bool fail_on_read_problem) {
1.126 paf 589: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.54 parser 590: if(unlink(fname)!=0)
1.93 paf 591: if(fail_on_read_problem)
1.126 paf 592: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.93 paf 593: &file_spec,
594: "unlink failed: %s (%d), actual filename '%s'",
1.126 paf 595: strerror(errno), errno, fname);
1.93 paf 596: else
597: return false;
1.50 paf 598:
1.126 paf 599: rmdir(file_spec, 1);
1.93 paf 600: return true;
1.60 parser 601: }
1.95 paf 602: void file_move(const String& old_spec, const String& new_spec) {
1.126 paf 603: const char* old_spec_cstr=old_spec.cstr(String::UL_FILE_SPEC);
604: const char* new_spec_cstr=new_spec.cstr(String::UL_FILE_SPEC);
1.63 parser 605:
1.126 paf 606: create_dir_for_file(new_spec);
1.63 parser 607:
1.60 parser 608: if(rename(old_spec_cstr, new_spec_cstr)!=0)
1.126 paf 609: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.60 parser 610: &old_spec,
611: "rename failed: %s (%d), actual filename '%s' to '%s'",
1.126 paf 612: strerror(errno), errno, old_spec_cstr, new_spec_cstr);
1.63 parser 613:
1.126 paf 614: rmdir(old_spec, 1);
1.31 paf 615: }
616:
1.51 paf 617:
1.126 paf 618: bool entry_exists(const char* fname, struct stat *afinfo) {
1.118 paf 619: struct stat lfinfo;
620: bool result=stat(fname, &lfinfo)==0;
621: if(afinfo)
622: *afinfo=lfinfo;
623: return result;
1.119 paf 624: }
625:
626: bool entry_exists(const String& file_spec) {
1.126 paf 627: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
628: return entry_exists(fname, 0);
1.118 paf 629: }
630:
1.51 paf 631: static bool entry_readable(const String& file_spec, bool need_dir) {
1.126 paf 632: char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.120 paf 633: if(need_dir) {
1.126 paf 634: size_t size=strlen(fname);
1.120 paf 635: while(size) {
1.126 paf 636: char c=fname[size-1];
1.120 paf 637: if(c=='/' || c=='\\')
638: fname[--size]=0;
639: else
640: break;
641: }
642: }
1.51 paf 643: struct stat finfo;
1.118 paf 644: if(access(fname, R_OK)==0 && entry_exists(fname, &finfo)) {
1.109 paf 645: bool is_dir=(finfo.st_mode&S_IFDIR) != 0;
1.51 paf 646: return is_dir==need_dir;
647: }
648: return false;
649: }
1.31 paf 650: bool file_readable(const String& file_spec) {
1.126 paf 651: return entry_readable(file_spec, false);
1.51 paf 652: }
653: bool dir_readable(const String& file_spec) {
1.126 paf 654: return entry_readable(file_spec, true);
1.65 parser 655: }
656: String *file_readable(const String& path, const String& name) {
1.126 paf 657: String *result=new(path.pool()) String(path);
658: *result << "/";
1.65 parser 659: *result << name;
660: return file_readable(*result)?result:0;
1.43 paf 661: }
662: bool file_executable(const String& file_spec) {
1.64 parser 663: return access(file_spec.cstr(String::UL_FILE_SPEC), X_OK)==0;
1.44 paf 664: }
665:
1.64 parser 666: bool file_stat(const String& file_spec,
1.58 parser 667: size_t& rsize,
1.126 paf 668: time_t& ratime,
669: time_t& rmtime,
670: time_t& rctime,
1.64 parser 671: bool fail_on_read_problem) {
1.126 paf 672: Pool& pool=file_spec.pool();
673: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.44 paf 674: struct stat finfo;
675: if(stat(fname, &finfo)!=0)
1.64 parser 676: if(fail_on_read_problem)
1.126 paf 677: throw Exception("file.missing",
1.67 parser 678: &file_spec,
679: "getting file size failed: %s (%d), real filename '%s'",
1.126 paf 680: strerror(errno), errno, fname);
1.64 parser 681: else
682: return false;
1.58 parser 683: rsize=finfo.st_size;
684: ratime=finfo.st_atime;
685: rmtime=finfo.st_mtime;
686: rctime=finfo.st_ctime;
1.64 parser 687: return true;
1.18 paf 688: }
689:
1.126 paf 690: char* getrow(char* *row_ref, char delim) {
691: char* result=*row_ref;
1.8 paf 692: if(result) {
1.126 paf 693: *row_ref=strchr(result, delim);
1.8 paf 694: if(*row_ref)
695: *((*row_ref)++)=0;
696: else if(!*result)
697: return 0;
698: }
699: return result;
700: }
701:
1.126 paf 702: char* lsplit(char* string, char delim) {
1.23 paf 703: if(string) {
1.126 paf 704: char* v=strchr(string, delim);
1.8 paf 705: if(v) {
706: *v=0;
707: return v+1;
708: }
709: }
710: return 0;
711: }
712:
1.126 paf 713: char* lsplit(char* *string_ref, char delim) {
714: char* result=*string_ref;
715: char* next=lsplit(*string_ref, delim);
1.8 paf 716: *string_ref=next;
717: return result;
1.9 paf 718: }
719:
1.126 paf 720: char* rsplit(char* string, char delim) {
1.18 paf 721: if(string) {
1.126 paf 722: char* v=strrchr(string, delim);
1.18 paf 723: if(v) {
1.9 paf 724: *v=0;
725: return v+1;
726: }
727: }
728: return NULL;
1.10 paf 729: }
730:
1.37 paf 731: /// @todo less stupid type detection
1.126 paf 732: char* format(Pool& pool, double value, char* fmt) {
733: char local_buf[MAX_NUMBER];
1.108 paf 734: size_t size;
735:
1.10 paf 736: if(fmt)
737: if(strpbrk(fmt, "diouxX"))
738: if(strpbrk(fmt, "ouxX"))
1.126 paf 739: size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value);
1.10 paf 740: else
1.126 paf 741: size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value);
1.10 paf 742: else
1.126 paf 743: size=snprintf(local_buf, sizeof(local_buf), fmt, value);
1.10 paf 744: else
1.126 paf 745: size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value);
1.10 paf 746:
1.126 paf 747: char* pool_buf=(char *)pool.malloc(size+1, 4);
748: memcpy(pool_buf, local_buf, size+1);
1.108 paf 749: return pool_buf;
1.12 paf 750: }
751:
1.36 paf 752: size_t stdout_write(const void *buf, size_t size) {
1.12 paf 753: #ifdef WIN32
754: do{
1.126 paf 755: int chunk_written=fwrite(buf, 1, min(8*0x400, size), stdout);
1.12 paf 756: if(chunk_written<=0)
757: break;
758: size-=chunk_written;
1.36 paf 759: buf=((const char*)buf)+chunk_written;
1.126 paf 760: } while(size>0);
1.12 paf 761:
762: return size;
763: #else
1.126 paf 764: return fwrite(buf, 1, size, stdout);
1.12 paf 765: #endif
1.2 paf 766: }
1.14 paf 767:
1.126 paf 768: char* unescape_chars(Pool& pool, const char* cp, int len) {
769: char* s=(char *)pool.malloc(len + 1, 5);
1.14 paf 770: enum EscapeState {
1.33 paf 771: EscapeRest,
772: EscapeFirst,
1.14 paf 773: EscapeSecond
774: } escapeState=EscapeRest;
775: int escapedValue=0;
776: int srcPos=0;
777: int dstPos=0;
778: while(srcPos < len) {
1.126 paf 779: int ch=cp[srcPos];
1.14 paf 780: switch(escapeState) {
781: case EscapeRest:
782: if(ch=='%') {
783: escapeState=EscapeFirst;
784: } else if(ch=='+') {
1.126 paf 785: s[dstPos++]=' ';
1.14 paf 786: } else {
787: s[dstPos++]=ch;
788: }
789: break;
790: case EscapeFirst:
791: escapedValue=hex_value[ch] << 4;
792: escapeState=EscapeSecond;
793: break;
794: case EscapeSecond:
1.126 paf 795: escapedValue +=hex_value[ch];
1.14 paf 796: s[dstPos++]=escapedValue;
797: escapeState=EscapeRest;
798: break;
799: }
1.126 paf 800: srcPos++;
1.14 paf 801: }
802: s[dstPos]=0;
803: return s;
1.24 paf 804: }
805:
806: #ifdef WIN32
1.126 paf 807: void back_slashes_to_slashes(char* s) {
1.24 paf 808: if(s)
809: for(; *s; s++)
810: if(*s=='\\')
1.126 paf 811: *s='/';
1.24 paf 812: }
1.42 paf 813: /*
1.126 paf 814: void slashes_to_back_slashes(char* s) {
1.42 paf 815: if(s)
816: for(; *s; s++)
817: if(*s=='/')
1.126 paf 818: *s='\\';
1.42 paf 819: }
820: */
1.24 paf 821: #endif
1.41 paf 822:
1.126 paf 823: bool StrEqNc(const char* s1, const char* s2, bool strict) {
1.41 paf 824: while(true) {
825: if(!(*s1)) {
826: if(!(*s2))
827: return true;
828: else
829: return !strict;
830: } else if(!(*s2))
831: return !strict;
832: if(isalpha(*s1)) {
833: if(tolower(*s1) !=tolower(*s2))
834: return false;
835: } else if((*s1) !=(*s2))
836: return false;
1.126 paf 837: s1++;
838: s2++;
1.41 paf 839: }
1.57 parser 840: }
841:
1.84 paf 842: static bool isLeap(int year) {
1.57 parser 843: return !(
844: (year % 4) || ((year % 400) && !(year % 100))
1.126 paf 845: );
1.57 parser 846: }
847:
848: int getMonthDays(int year, int month) {
849: int monthDays[]={
1.126 paf 850: 31,
851: isLeap(year) ? 29 : 28,
852: 31,
853: 30,
854: 31,
855: 30,
856: 31,
857: 31,
858: 30,
859: 31,
860: 30,
1.57 parser 861: 31
1.126 paf 862: };
863: return monthDays[month];
1.41 paf 864: }
1.69 parser 865:
1.126 paf 866: void remove_crlf(char* start, char* end) {
867: for(char* p=start; p<end; p++)
1.69 parser 868: switch(*p) {
1.126 paf 869: case '\n': *p='|'; break;
870: case '\r': *p=' '; break;
1.69 parser 871: }
1.91 paf 872: }
873:
874:
875: /// must be last in this file
876: #undef vsnprintf
1.126 paf 877: int __vsnprintf(char* b, size_t s, const char* f, va_list l) {
1.91 paf 878: if(!s)
879: return 0;
880:
881: int r;
882: // note: on win32& maybe somewhere else
883: // vsnprintf do not writes terminating 0 in 'buffer full' case, reducing
884: --s;
885: #if _MSC_VER
886: /*
887: win32:
888: mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm
889:
890: if the number of bytes to write exceeds buffer, then count bytes are written and –1 is returned
891: */
1.126 paf 892: r=_vsnprintf(b, s, f, l);
1.91 paf 893: if(r<0)
894: r=s;
895: #else
1.126 paf 896: r=vsnprintf(b, s, f, l);
1.91 paf 897: /*
898: solaris:
899: man vsnprintf
900:
901: The snprintf() function returns the number of characters
902: formatted, that is, the number of characters that would have
903: been written to the buffer if it were large enough. If the
904: value of n is 0 on a call to snprintf(), an unspecified
905: value less than 1 is returned.
906: */
907:
908: if(r<0)
909: r=0;
910: else if(r>s)
911: r=s;
912: #endif
913: b[r]=0;
914: return r;
915: }
916:
1.126 paf 917: int __snprintf(char* b, size_t s, const char* f, ...) {
1.91 paf 918: va_list l;
1.126 paf 919: va_start(l, f);
920: int r=__vsnprintf(b, s, f, l);
921: va_end(l);
1.91 paf 922: return r;
1.98 paf 923: }
924:
925: int pa_sleep(unsigned long secs, unsigned long usecs) {
1.126 paf 926: for (; usecs >= 1000000; ++secs, usecs -= 1000000);
1.98 paf 927:
928: #ifdef WIN32
1.126 paf 929: Sleep(secs * 1000 + usecs / 1000);
1.98 paf 930: return 0;
931: #else
932: struct timeval t;
933: t.tv_sec = secs;
934: t.tv_usec = usecs;
1.126 paf 935: return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0);
1.98 paf 936: #endif
1.74 parser 937: }
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