Annotation of parser3/src/main/pa_common.C, revision 1.134
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:
1.134 ! paf 8: static const char* IDENT_COMMON_C="$Date: 2002/11/29 07:42:16 $";
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:
1.134 ! paf 255: // force all to URI lang
! 256: String& value_string=*new(pool) String(pool);
! 257: value_string.append(*(static_cast<Value *>(value))->get_string(), String::UL_URI, true);
! 258:
! 259: *(i.request)<<key<<": "<< value_string <<"\n";
1.127 paf 260:
261: if(key.change_case(pool, String::CC_UPPER)=="USER-AGENT")
262: i.user_agent_specified=true;
1.126 paf 263: }
264: static void file_read_http(Pool& pool, const String& file_spec,
265: void*& data, size_t& data_size,
1.127 paf 266: Hash *options=0, Hash** out_fields=0) {
1.126 paf 267: char host[MAX_STRING];
1.129 paf 268: const char* uri;
1.126 paf 269: int port;
270: const char* method="GET";
271: int timeout=2;
1.127 paf 272: Value *vheaders=0;
1.126 paf 273:
1.133 paf 274: String connect_string(pool);
275: // not in ^sql{... UL_SQL ...} spirit, but closer to ^file::load one
276: connect_string.append(file_spec, String::UL_URI); // tainted pieces -> URI pieces
277:
278: char* connect_string_cstr=connect_string.cstr(String::UL_UNSPECIFIED);
279: if(strncmp(connect_string_cstr, "http://", 7)!=0)
1.126 paf 280: throw Exception(0,
1.133 paf 281: &connect_string,
1.126 paf 282: "does not start with http://"); //never
1.133 paf 283: connect_string_cstr+=7;
1.126 paf 284:
1.133 paf 285: strncpy(host, connect_string_cstr, sizeof(host)-1); host[sizeof(host)-1]=0;
1.126 paf 286: char* host_uri=lsplit(host, '/');
1.133 paf 287: uri=host_uri?connect_string_cstr+(host_uri-1-host):"/";
1.126 paf 288: char* port_cstr=lsplit(host, ':');
289: char* error_pos=0;
290: port=port_cstr?strtol(port_cstr, &error_pos, 0):80;
291:
1.127 paf 292: if(options) {
293: int valid_options=0;
294: if(Value *vmethod=static_cast<Value *>(options->get(*http_method_name))) {
295: valid_options++;
296: method=vmethod->as_string().cstr();
297: }
298: if(Value *vtimeout=static_cast<Value *>(options->get(*http_timeout_name))) {
299: valid_options++;
300: timeout=vtimeout->as_int();
301: }
302: if(vheaders=static_cast<Value *>(options->get(*http_headers_name))) {
303: valid_options++;
304: }
305: if(valid_options!=options->size())
306: throw Exception("parser.runtime",
307: 0,
308: "invalid option passed");
1.133 paf 309: }
1.126 paf 310:
311: //making request
1.127 paf 312: String request(pool);
1.126 paf 313: request<< method <<" "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n";
1.127 paf 314: bool user_agent_specified=false;
315: if(vheaders && !vheaders->is_string()) { // allow empty
1.133 paf 316: if(Hash *headers=vheaders->get_hash(&connect_string)) {
1.127 paf 317: Http_pass_header_info info={&request};
318: headers->for_each(http_pass_header, &info);
319: user_agent_specified=info.user_agent_specified;
320: } else
321: throw Exception("parser.runtime",
1.133 paf 322: &connect_string,
1.127 paf 323: "headers param must be hash");
324: };
325: if(!user_agent_specified) // defaulting
326: request << "user-agent: " DEFAULT_USER_AGENT "\n";
1.126 paf 327: request<<"\n";
328:
329: //sending request
330: String response(pool);
331: http_request(response,
1.133 paf 332: &connect_string, host, port, request.cstr(String::UL_UNSPECIFIED), timeout);
1.126 paf 333:
334: //processing results
335: int pos=response.pos("\r\n\r\n", 4);
336: if(pos<1){
337: throw Exception("http.response",
1.133 paf 338: &connect_string,
1.126 paf 339: "bad response from host - no headers found");
340: }
341: String header_block=response.mid(0, pos);
342: String body=response.mid(pos+4, response.size());
343:
344: Array aheaders(pool);
345: Hash& headers=*new(pool) Hash(pool);
346: size_t pos_after_ref=0;
347: header_block.split(aheaders, &pos_after_ref, "\r\n", 2);
348:
349: //processing status code
350: const String *status_line=aheaders.get_string(0);
351: if(!status_line){
352: throw Exception("http.response",
1.133 paf 353: &connect_string,
1.126 paf 354: "bad response from host - no status line ");
355: }
356: //processing headers
357: for(int i=1;i<aheaders.size();i++) {
358: if(const String *line=aheaders.get_string(i)) {
359: pos=line->pos(": ", 2);
360: if(pos<1)
361: throw Exception("http.response",
1.133 paf 362: &connect_string,
1.126 paf 363: "bad response from host - bad header \"%s\"", line->cstr());
364:
1.128 paf 365: headers.put(
366: line->mid(0, pos).change_case(pool, String::CC_UPPER),
367: new(pool) VString(line->mid(pos+2, line->size())));
1.126 paf 368: } else
369: throw Exception("http.response",
1.133 paf 370: &connect_string,
1.126 paf 371: "bad response from host - bad headers \"%s\"", header_block.cstr());
372: }
373:
374: // output response
375: data=body.cstr(); data_size=body.size();
1.130 paf 376: if(out_fields)
1.126 paf 377: *out_fields=&headers;
1.34 paf 378: }
1.123 paf 379:
380: #ifndef DOXYGEN
381: struct File_read_action_info {
382: void **data; size_t *data_size;
1.126 paf 383: };
1.123 paf 384: #endif
1.126 paf 385: static void file_read_action(Pool& pool,
386: struct stat& finfo,
1.123 paf 387: int f,
1.126 paf 388: const String& file_spec, const char* fname, bool as_text,
1.123 paf 389: void *context) {
1.126 paf 390: File_read_action_info& info=*static_cast<File_read_action_info *>(context);
1.123 paf 391: if(size_t to_read_size=(size_t)finfo.st_size) {
1.126 paf 392: *info.data=pool.malloc(to_read_size+(as_text?1:0), 3);
393: *info.data_size=(size_t)read(f, *info.data, to_read_size);
1.123 paf 394:
395: if(ssize_t(*info.data_size)<0 || *info.data_size>to_read_size)
1.126 paf 396: throw Exception(0,
1.123 paf 397: &file_spec,
398: "read failed: actually read %lu bytes count not in [0..%lu] valid range",
1.126 paf 399: *info.data_size, to_read_size);
1.123 paf 400: } else { // empty file
401: if(as_text) {
1.126 paf 402: *info.data=pool.malloc(1);
1.123 paf 403: *(char*)(*info.data)=0;
404: } else
405: *info.data=0;
406: *info.data_size=0;
407: return;
408: }
1.126 paf 409: }
410: bool file_read(Pool& pool, const String& file_spec,
411: void*& data, size_t& data_size,
412: bool as_text, Hash *params, Hash** out_fields,
413: bool fail_on_read_problem) {
414: bool result;
415: if(file_spec.starts_with("http://", 7)) {
416: // fail on read problem
417: file_read_http(pool, file_spec, data, data_size, params, out_fields);
418: result=true;
419: } else {
420: File_read_action_info info={&data, &data_size};
421: result=file_read_action_under_lock(pool, file_spec,
422: "read", file_read_action, &info,
423: as_text, fail_on_read_problem);
424: }
1.123 paf 425:
1.126 paf 426: if(result && as_text) {
1.131 paf 427: // UTF-8 signature: EF BB BF
428: if(data_size>=3) {
429: char *in=(char *)data;
430: if((in[0] == '\xEF') && (in[1] == '\xBB') &&
431: (in[2] == '\xBF')) {
432: data=in+3; data_size-=3;// skip prefix
433: }
434: }
435:
1.126 paf 436: fix_line_breaks((char *)(data), data_size);
1.123 paf 437: // note: after fixing
1.126 paf 438: ((char*&)(data))[data_size]=0;
1.123 paf 439: }
1.126 paf 440:
441: return result;
1.123 paf 442: }
443:
444: bool file_read_action_under_lock(Pool& pool, const String& file_spec,
1.126 paf 445: const char* action_name, File_read_action action, void *context,
446: bool as_text,
1.123 paf 447: bool fail_on_read_problem) {
1.126 paf 448: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.33 paf 449: int f;
450:
451: // first open, next stat:
1.45 paf 452: // directory update of NTFS hard links performed on open.
1.33 paf 453: // ex:
454: // a.html:^test[] and b.html hardlink to a.html
455: // user inserts ! before ^test in a.html
1.126 paf 456: // directory entry of b.html in NTFS not updated at once,
1.35 paf 457: // they delay update till open, so we would receive "!^test[" string
458: // if would do stat, next open.
1.123 paf 459: // later: it seems, even this does not help sometimes
1.98 paf 460: if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) {
1.123 paf 461: try {
462: if(lock_shared_blocking(f)!=0)
1.126 paf 463: throw Exception("file.lock",
1.123 paf 464: &file_spec,
465: "shared lock failed: %s (%d), actual filename '%s'",
1.126 paf 466: strerror(errno), errno, fname);
1.123 paf 467:
1.124 paf 468: struct stat finfo;
469: if(stat(fname, &finfo)!=0)
470: throw Exception("file.missing", // hardly possible: we just opened it OK
471: &file_spec,
472: "stat failed: %s (%d), actual filename '%s'",
1.126 paf 473: strerror(errno), errno, fname);
1.124 paf 474:
1.105 paf 475: #ifdef NO_FOREIGN_GROUP_FILES
1.132 paf 476: if(finfo.st_gid/*foreign?*/!=getegid())
1.126 paf 477: throw Exception("parser.runtime",
478: &file_spec,
1.123 paf 479: "parser reading files of foreign group disabled [recompile parser without --disable-foreign-group-files configure option], actual filename '%s'",
1.126 paf 480: fname);
1.105 paf 481: #endif
1.32 paf 482:
1.126 paf 483: action(pool, finfo, f, file_spec, fname, as_text, context);
1.123 paf 484: } catch(...) {
1.126 paf 485: unlock(f);close(f);
1.123 paf 486: if(fail_on_read_problem)
487: /*re*/throw;
488: return false;
489: }
1.87 paf 490:
1.126 paf 491: unlock(f);close(f);
1.72 parser 492: return true;
1.118 paf 493: } else {
494: if(fail_on_read_problem)
1.126 paf 495: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.118 paf 496: &file_spec,
1.123 paf 497: "%s failed: %s (%d), actual filename '%s'",
1.126 paf 498: action_name, strerror(errno), errno, fname);
1.118 paf 499: return false;
500: }
1.8 paf 501: }
502:
1.63 parser 503: static void create_dir_for_file(const String& file_spec) {
504: size_t pos_after=1;
505: int pos_before;
506: while((pos_before=file_spec.pos("/", 1, pos_after))>=0) {
1.126 paf 507: mkdir(file_spec.mid(0, pos_before).cstr(String::UL_FILE_SPEC), 0775);
1.63 parser 508: pos_after=pos_before+1;
509: }
510: }
511:
1.98 paf 512: bool file_write_action_under_lock(
1.28 paf 513: const String& file_spec,
1.126 paf 514: const char* action_name, File_write_action action, void *context,
515: bool as_text,
516: bool do_append,
517: bool do_block,
1.110 paf 518: bool fail_on_lock_problem) {
1.126 paf 519: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.28 paf 520: int f;
1.80 paf 521: if(access(fname, W_OK)!=0) // no
1.126 paf 522: create_dir_for_file(file_spec);
1.50 paf 523:
1.80 paf 524: if((f=open(fname,
525: O_CREAT|O_RDWR
526: |(as_text?_O_TEXT:_O_BINARY)
1.122 paf 527: |(do_append?O_APPEND:0), 0664))>=0) {
1.99 paf 528: if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) {
1.126 paf 529: Exception e("file.lock",
1.110 paf 530: &file_spec,
531: "shared lock failed: %s (%d), actual filename '%s'",
1.126 paf 532: strerror(errno), errno, fname);
533: close(f);
1.110 paf 534: if(fail_on_lock_problem)
535: throw e;
1.98 paf 536: return false;
537: }
1.96 paf 538:
539: try {
1.126 paf 540: action(f, context);
1.96 paf 541: } catch(...) {
1.104 paf 542: if(!do_append)
1.125 paf 543: ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower
1.126 paf 544: unlock(f);close(f);
1.96 paf 545: /*re*/throw;
546: }
1.80 paf 547:
1.104 paf 548: if(!do_append)
1.125 paf 549: 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 550: unlock(f);close(f);
1.98 paf 551: return true;
1.80 paf 552: } else
1.126 paf 553: throw Exception(errno==EACCES?"file.access":0,
1.80 paf 554: &file_spec,
1.96 paf 555: "%s failed: %s (%d), actual filename '%s'",
1.126 paf 556: action_name, strerror(errno), errno, fname);
1.96 paf 557: // here should be nothing, see rethrow above
558: }
559:
560: #ifndef DOXYGEN
561: struct File_write_action_info {
562: const void *data; size_t size;
1.126 paf 563: };
1.96 paf 564: #endif
565: static void file_write_action(int f, void *context) {
1.126 paf 566: File_write_action_info& info=*static_cast<File_write_action_info *>(context);
1.113 paf 567: if(info.size) {
1.126 paf 568: int written=write(f, info.data, info.size);
1.116 paf 569: if(written<0)
1.126 paf 570: throw Exception(0,
571: 0,
572: "write failed: %s (%d)", strerror(errno), errno);
1.113 paf 573: }
1.96 paf 574: }
575: void file_write(
576: const String& file_spec,
577: const void *data, size_t size,
1.126 paf 578: bool as_text,
1.96 paf 579: bool do_append) {
1.126 paf 580: File_write_action_info info={data, size};
1.98 paf 581: file_write_action_under_lock(
1.96 paf 582: file_spec,
1.126 paf 583: "write", file_write_action, &info,
584: as_text,
585: do_append);
1.30 paf 586: }
587:
1.63 parser 588: // throws nothing! [this is required in file_move & file_delete]
1.50 paf 589: static void rmdir(const String& file_spec, size_t pos_after) {
590: int pos_before;
591: if((pos_before=file_spec.pos("/", 1, pos_after))>=0)
1.126 paf 592: rmdir(file_spec, pos_before+1);
1.50 paf 593:
1.126 paf 594: rmdir(file_spec.mid(0, pos_after-1/* / */).cstr(String::UL_FILE_SPEC));
1.50 paf 595: }
1.95 paf 596: bool file_delete(const String& file_spec, bool fail_on_read_problem) {
1.126 paf 597: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.54 parser 598: if(unlink(fname)!=0)
1.93 paf 599: if(fail_on_read_problem)
1.126 paf 600: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.93 paf 601: &file_spec,
602: "unlink failed: %s (%d), actual filename '%s'",
1.126 paf 603: strerror(errno), errno, fname);
1.93 paf 604: else
605: return false;
1.50 paf 606:
1.126 paf 607: rmdir(file_spec, 1);
1.93 paf 608: return true;
1.60 parser 609: }
1.95 paf 610: void file_move(const String& old_spec, const String& new_spec) {
1.126 paf 611: const char* old_spec_cstr=old_spec.cstr(String::UL_FILE_SPEC);
612: const char* new_spec_cstr=new_spec.cstr(String::UL_FILE_SPEC);
1.63 parser 613:
1.126 paf 614: create_dir_for_file(new_spec);
1.63 parser 615:
1.60 parser 616: if(rename(old_spec_cstr, new_spec_cstr)!=0)
1.126 paf 617: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.60 parser 618: &old_spec,
619: "rename failed: %s (%d), actual filename '%s' to '%s'",
1.126 paf 620: strerror(errno), errno, old_spec_cstr, new_spec_cstr);
1.63 parser 621:
1.126 paf 622: rmdir(old_spec, 1);
1.31 paf 623: }
624:
1.51 paf 625:
1.126 paf 626: bool entry_exists(const char* fname, struct stat *afinfo) {
1.118 paf 627: struct stat lfinfo;
628: bool result=stat(fname, &lfinfo)==0;
629: if(afinfo)
630: *afinfo=lfinfo;
631: return result;
1.119 paf 632: }
633:
634: bool entry_exists(const String& file_spec) {
1.126 paf 635: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
636: return entry_exists(fname, 0);
1.118 paf 637: }
638:
1.51 paf 639: static bool entry_readable(const String& file_spec, bool need_dir) {
1.126 paf 640: char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.120 paf 641: if(need_dir) {
1.126 paf 642: size_t size=strlen(fname);
1.120 paf 643: while(size) {
1.126 paf 644: char c=fname[size-1];
1.120 paf 645: if(c=='/' || c=='\\')
646: fname[--size]=0;
647: else
648: break;
649: }
650: }
1.51 paf 651: struct stat finfo;
1.118 paf 652: if(access(fname, R_OK)==0 && entry_exists(fname, &finfo)) {
1.109 paf 653: bool is_dir=(finfo.st_mode&S_IFDIR) != 0;
1.51 paf 654: return is_dir==need_dir;
655: }
656: return false;
657: }
1.31 paf 658: bool file_readable(const String& file_spec) {
1.126 paf 659: return entry_readable(file_spec, false);
1.51 paf 660: }
661: bool dir_readable(const String& file_spec) {
1.126 paf 662: return entry_readable(file_spec, true);
1.65 parser 663: }
664: String *file_readable(const String& path, const String& name) {
1.126 paf 665: String *result=new(path.pool()) String(path);
666: *result << "/";
1.65 parser 667: *result << name;
668: return file_readable(*result)?result:0;
1.43 paf 669: }
670: bool file_executable(const String& file_spec) {
1.64 parser 671: return access(file_spec.cstr(String::UL_FILE_SPEC), X_OK)==0;
1.44 paf 672: }
673:
1.64 parser 674: bool file_stat(const String& file_spec,
1.58 parser 675: size_t& rsize,
1.126 paf 676: time_t& ratime,
677: time_t& rmtime,
678: time_t& rctime,
1.64 parser 679: bool fail_on_read_problem) {
1.126 paf 680: Pool& pool=file_spec.pool();
681: const char* fname=file_spec.cstr(String::UL_FILE_SPEC);
1.44 paf 682: struct stat finfo;
683: if(stat(fname, &finfo)!=0)
1.64 parser 684: if(fail_on_read_problem)
1.126 paf 685: throw Exception("file.missing",
1.67 parser 686: &file_spec,
687: "getting file size failed: %s (%d), real filename '%s'",
1.126 paf 688: strerror(errno), errno, fname);
1.64 parser 689: else
690: return false;
1.58 parser 691: rsize=finfo.st_size;
692: ratime=finfo.st_atime;
693: rmtime=finfo.st_mtime;
694: rctime=finfo.st_ctime;
1.64 parser 695: return true;
1.18 paf 696: }
697:
1.126 paf 698: char* getrow(char* *row_ref, char delim) {
699: char* result=*row_ref;
1.8 paf 700: if(result) {
1.126 paf 701: *row_ref=strchr(result, delim);
1.8 paf 702: if(*row_ref)
703: *((*row_ref)++)=0;
704: else if(!*result)
705: return 0;
706: }
707: return result;
708: }
709:
1.126 paf 710: char* lsplit(char* string, char delim) {
1.23 paf 711: if(string) {
1.126 paf 712: char* v=strchr(string, delim);
1.8 paf 713: if(v) {
714: *v=0;
715: return v+1;
716: }
717: }
718: return 0;
719: }
720:
1.126 paf 721: char* lsplit(char* *string_ref, char delim) {
722: char* result=*string_ref;
723: char* next=lsplit(*string_ref, delim);
1.8 paf 724: *string_ref=next;
725: return result;
1.9 paf 726: }
727:
1.126 paf 728: char* rsplit(char* string, char delim) {
1.18 paf 729: if(string) {
1.126 paf 730: char* v=strrchr(string, delim);
1.18 paf 731: if(v) {
1.9 paf 732: *v=0;
733: return v+1;
734: }
735: }
736: return NULL;
1.10 paf 737: }
738:
1.37 paf 739: /// @todo less stupid type detection
1.126 paf 740: char* format(Pool& pool, double value, char* fmt) {
741: char local_buf[MAX_NUMBER];
1.108 paf 742: size_t size;
743:
1.10 paf 744: if(fmt)
745: if(strpbrk(fmt, "diouxX"))
746: if(strpbrk(fmt, "ouxX"))
1.126 paf 747: size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value);
1.10 paf 748: else
1.126 paf 749: size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value);
1.10 paf 750: else
1.126 paf 751: size=snprintf(local_buf, sizeof(local_buf), fmt, value);
1.10 paf 752: else
1.126 paf 753: size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value);
1.10 paf 754:
1.126 paf 755: char* pool_buf=(char *)pool.malloc(size+1, 4);
756: memcpy(pool_buf, local_buf, size+1);
1.108 paf 757: return pool_buf;
1.12 paf 758: }
759:
1.36 paf 760: size_t stdout_write(const void *buf, size_t size) {
1.12 paf 761: #ifdef WIN32
762: do{
1.126 paf 763: int chunk_written=fwrite(buf, 1, min(8*0x400, size), stdout);
1.12 paf 764: if(chunk_written<=0)
765: break;
766: size-=chunk_written;
1.36 paf 767: buf=((const char*)buf)+chunk_written;
1.126 paf 768: } while(size>0);
1.12 paf 769:
770: return size;
771: #else
1.126 paf 772: return fwrite(buf, 1, size, stdout);
1.12 paf 773: #endif
1.2 paf 774: }
1.14 paf 775:
1.126 paf 776: char* unescape_chars(Pool& pool, const char* cp, int len) {
777: char* s=(char *)pool.malloc(len + 1, 5);
1.14 paf 778: enum EscapeState {
1.33 paf 779: EscapeRest,
780: EscapeFirst,
1.14 paf 781: EscapeSecond
782: } escapeState=EscapeRest;
783: int escapedValue=0;
784: int srcPos=0;
785: int dstPos=0;
786: while(srcPos < len) {
1.126 paf 787: int ch=cp[srcPos];
1.14 paf 788: switch(escapeState) {
789: case EscapeRest:
790: if(ch=='%') {
791: escapeState=EscapeFirst;
792: } else if(ch=='+') {
1.126 paf 793: s[dstPos++]=' ';
1.14 paf 794: } else {
795: s[dstPos++]=ch;
796: }
797: break;
798: case EscapeFirst:
799: escapedValue=hex_value[ch] << 4;
800: escapeState=EscapeSecond;
801: break;
802: case EscapeSecond:
1.126 paf 803: escapedValue +=hex_value[ch];
1.14 paf 804: s[dstPos++]=escapedValue;
805: escapeState=EscapeRest;
806: break;
807: }
1.126 paf 808: srcPos++;
1.14 paf 809: }
810: s[dstPos]=0;
811: return s;
1.24 paf 812: }
813:
814: #ifdef WIN32
1.126 paf 815: void back_slashes_to_slashes(char* s) {
1.24 paf 816: if(s)
817: for(; *s; s++)
818: if(*s=='\\')
1.126 paf 819: *s='/';
1.24 paf 820: }
1.42 paf 821: /*
1.126 paf 822: void slashes_to_back_slashes(char* s) {
1.42 paf 823: if(s)
824: for(; *s; s++)
825: if(*s=='/')
1.126 paf 826: *s='\\';
1.42 paf 827: }
828: */
1.24 paf 829: #endif
1.41 paf 830:
1.126 paf 831: bool StrEqNc(const char* s1, const char* s2, bool strict) {
1.41 paf 832: while(true) {
833: if(!(*s1)) {
834: if(!(*s2))
835: return true;
836: else
837: return !strict;
838: } else if(!(*s2))
839: return !strict;
840: if(isalpha(*s1)) {
841: if(tolower(*s1) !=tolower(*s2))
842: return false;
843: } else if((*s1) !=(*s2))
844: return false;
1.126 paf 845: s1++;
846: s2++;
1.41 paf 847: }
1.57 parser 848: }
849:
1.84 paf 850: static bool isLeap(int year) {
1.57 parser 851: return !(
852: (year % 4) || ((year % 400) && !(year % 100))
1.126 paf 853: );
1.57 parser 854: }
855:
856: int getMonthDays(int year, int month) {
857: int monthDays[]={
1.126 paf 858: 31,
859: isLeap(year) ? 29 : 28,
860: 31,
861: 30,
862: 31,
863: 30,
864: 31,
865: 31,
866: 30,
867: 31,
868: 30,
1.57 parser 869: 31
1.126 paf 870: };
871: return monthDays[month];
1.41 paf 872: }
1.69 parser 873:
1.126 paf 874: void remove_crlf(char* start, char* end) {
875: for(char* p=start; p<end; p++)
1.69 parser 876: switch(*p) {
1.126 paf 877: case '\n': *p='|'; break;
878: case '\r': *p=' '; break;
1.69 parser 879: }
1.91 paf 880: }
881:
882:
883: /// must be last in this file
884: #undef vsnprintf
1.126 paf 885: int __vsnprintf(char* b, size_t s, const char* f, va_list l) {
1.91 paf 886: if(!s)
887: return 0;
888:
889: int r;
890: // note: on win32& maybe somewhere else
891: // vsnprintf do not writes terminating 0 in 'buffer full' case, reducing
892: --s;
893: #if _MSC_VER
894: /*
895: win32:
896: mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm
897:
898: if the number of bytes to write exceeds buffer, then count bytes are written and –1 is returned
899: */
1.126 paf 900: r=_vsnprintf(b, s, f, l);
1.91 paf 901: if(r<0)
902: r=s;
903: #else
1.126 paf 904: r=vsnprintf(b, s, f, l);
1.91 paf 905: /*
906: solaris:
907: man vsnprintf
908:
909: The snprintf() function returns the number of characters
910: formatted, that is, the number of characters that would have
911: been written to the buffer if it were large enough. If the
912: value of n is 0 on a call to snprintf(), an unspecified
913: value less than 1 is returned.
914: */
915:
916: if(r<0)
917: r=0;
918: else if(r>s)
919: r=s;
920: #endif
921: b[r]=0;
922: return r;
923: }
924:
1.126 paf 925: int __snprintf(char* b, size_t s, const char* f, ...) {
1.91 paf 926: va_list l;
1.126 paf 927: va_start(l, f);
928: int r=__vsnprintf(b, s, f, l);
929: va_end(l);
1.91 paf 930: return r;
1.98 paf 931: }
932:
933: int pa_sleep(unsigned long secs, unsigned long usecs) {
1.126 paf 934: for (; usecs >= 1000000; ++secs, usecs -= 1000000);
1.98 paf 935:
936: #ifdef WIN32
1.126 paf 937: Sleep(secs * 1000 + usecs / 1000);
1.98 paf 938: return 0;
939: #else
940: struct timeval t;
941: t.tv_sec = secs;
942: t.tv_usec = usecs;
1.126 paf 943: return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0);
1.98 paf 944: #endif
1.74 parser 945: }
E-mail:
![[BACK]](/cvsweb/icons/back.gif){kind=icon}
Return to pa_common.C CVS log ![[TXT]](/cvsweb/icons/text.gif){kind=icon}
![[DIR]](/cvsweb/icons/dir.gif){kind=icon}
Up to [parser3project] / parser3 / src / main