Annotation of parser3/src/main/pa_common.C, revision 1.143.2.21.2.26
1.15 paf 1: /** @file
1.16 paf 2: Parser: commonly functions.
3:
1.143.2.10 paf 4: Copyright(c) 2001-2003 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:
1.143.2.21.2. 6(paf 8:3): static const char* IDENT_COMMON_C="$Date: 2003/04/08 16:11:54 $";
1.1 paf 9:
10: #include "pa_common.h"
1.4 paf 11: #include "pa_exception.h"
1.126 paf 12: #include "pa_hash.h"
1.143.2.21.2. (paf 13:): #include "pa_globals.h"
5(paf 14:3): #include "pa_request_charsets.h"
15:3): #include "pa_charsets.h"
(paf 16:):
4(paf 17:3): #define PA_HTTP
(paf 18:):
19:): #ifdef PA_HTTP
1.143.2.3 paf 20: #include "pa_vstring.h"
1.143.2.4 paf 21: #include "pa_vint.h"
1.1 paf 22:
1.143.2.12 paf 23: #ifdef CYGWIN
24: #define _GNU_H_WINDOWS32_SOCKETS
25: // for PASCAL
26: #include <windows.h>
27: // SOCKET
28: typedef u_int SOCKET;
29: int PASCAL closesocket(SOCKET);
1.126 paf 30: #else
1.143.2.12 paf 31: # if defined(WIN32)
32: # include <windows.h>
33: # else
34: # define closesocket close
35: # endif
1.98 paf 36: #endif
37:
1.143.2.21.2. (paf 38:): #else
39:):
40:): # if defined(WIN32)
41:): # include <windows.h>
42:): # endif
43:):
44:): #endif
45:):
1.93 paf 46: // some maybe-undefined constants
47:
1.82 paf 48: #ifndef _O_TEXT
49: # define _O_TEXT 0
50: #endif
51: #ifndef _O_BINARY
52: # define _O_BINARY 0
1.47 paf 53: #endif
1.80 paf 54:
1.138 paf 55: #ifdef HAVE_FTRUNCATE
56: # define PA_O_TRUNC 0
57: #else
58: # ifdef _O_TRUNC
59: # define PA_O_TRUNC _O_TRUNC
60: # else
61: # error you must have either ftruncate function or _O_TRUNC bit declared
62: # endif
63: #endif
64:
1.93 paf 65: // locking constants
1.143.2.21.2. 9(paf 66:3): //#define PA_DEBUG_NO_LOCKING
67:3):
68:3): #ifdef PA_DEBUG_NO_LOCKING
69:3):
1.99 paf 70: #ifdef HAVE_FLOCK
71:
72: static int lock_shared_blocking(int fd) { return flock(fd, LOCK_SH); }
73: static int lock_exclusive_blocking(int fd) { return flock(fd, LOCK_EX); }
74: static int lock_exclusive_nonblocking(int fd) { return flock(fd, LOCK_EX || LOCK_NB); }
75: static int unlock(int fd) { return flock(fd, LOCK_UN); }
76:
1.98 paf 77: #else
1.99 paf 78: #ifdef HAVE__LOCKING
1.98 paf 79:
1.126 paf 80: #define FLOCK(operation) lseek(fd, 0, SEEK_SET); return _locking(fd, operation, 1)
1.99 paf 81: static int lock_shared_blocking(int fd) { FLOCK(_LK_LOCK); }
82: static int lock_exclusive_blocking(int fd) { FLOCK(_LK_LOCK); }
83: static int lock_exclusive_nonblocking(int fd) { FLOCK(_LK_NBLCK); }
84: static int unlock(int fd) { FLOCK(_LK_UNLCK); }
1.93 paf 85:
1.99 paf 86: #else
87: #ifdef HAVE_FCNTL
1.93 paf 88:
1.126 paf 89: #define FLOCK(cmd, arg) struct flock ls={arg, SEEK_SET}; return fcntl(fd, cmd, &ls)
1.99 paf 90: static int lock_shared_blocking(int fd) { FLOCK(F_SETLKW, F_RDLCK); }
91: static int lock_exclusive_blocking(int fd) { FLOCK(F_SETLKW, F_WRLCK); }
92: static int lock_exclusive_nonblocking(int fd) { FLOCK(F_SETLK, F_RDLCK); }
93: static int unlock(int fd) { FLOCK(F_SETLK, F_UNLCK); }
1.93 paf 94:
95: #else
96: #ifdef HAVE_LOCKF
1.99 paf 97:
1.126 paf 98: #define FLOCK(fd, operation) lseek(fd, 0, SEEK_SET); return lockf(fd, operation, 1)
1.99 paf 99: static int lock_shared_blocking(int fd) { FLOCK(F_LOCK); } // on intel solaris man doesn't have doc on shared blocking
100: static int lock_exclusive_blocking(int fd) { FLOCK(F_LOCK); }
101: static int lock_exclusive_nonblocking(int fd) { FLOCK(F_TLOCK); }
102: static int unlock(int fd) { FLOCK(F_TLOCK); }
103:
1.93 paf 104: #else
1.99 paf 105:
106: #error unable to find file locking func
107:
108: #endif
1.93 paf 109: #endif
110: #endif
111: #endif
112:
1.143.2.21.2. 6(paf 113:3): #else
114:3): static int lock_shared_blocking(int fd) { return 0; }
115:3): static int lock_exclusive_blocking(int fd) { return 0; }
116:3): static int lock_exclusive_nonblocking(int fd) { return 0; }
117:3): static int unlock(int fd) { return 0; }
118:3):
119:3): #endif
120:3):
1.143.2.16 paf 121: // defines for globals
122:
123: #define FILE_STATUS_NAME "status"
124:
125: // globals
126:
1.143.2.21.2. (paf 127:): const String file_status_name(FILE_STATUS_NAME);
1.143.2.16 paf 128:
1.143.2.14 paf 129: // defines for statics
130:
131: #define HTTP_METHOD_NAME "method"
132: #define HTTP_TIMEOUT_NAME "timeout"
133: #define HTTP_HEADERS_NAME "headers"
134: #define HTTP_ANY_STATUS_NAME "any-status"
1.143.2.21.2. 5(paf 135:3): #define HTTP_CHARSET_NAME "charset"
1.143.2.14 paf 136:
137: // statics
138:
1.143.2.21.2. (paf 139:): static const String http_method_name(HTTP_METHOD_NAME);
140:): static const String http_timeout_name(HTTP_TIMEOUT_NAME);
141:): static const String http_headers_name(HTTP_HEADERS_NAME);
142:): static const String http_any_status_name(HTTP_ANY_STATUS_NAME);
5(paf 143:3): static const String http_charset_name(HTTP_CHARSET_NAME);
1.143.2.14 paf 144:
145: // defines
146:
1.127 paf 147: #define DEFAULT_USER_AGENT "parser3"
148:
1.143.2.14 paf 149: // functions
1.127 paf 150:
1.143.2.21.2. 0(paf 151:3): void fix_line_breaks(char *str, size_t& length) {
1.87 paf 152: //_asm int 3;
1.143.2.21.2. 0(paf 153:3): const char* const eob=str+length;
154:3): char* dest=str;
1.72 parser 155: // fix DOS: \r\n -> \n
156: // fix Macintosh: \r -> \n
1.143.2.21.2. 0(paf 157:3): char* bol=str;
1.137 paf 158: while(char* eol=(char*)memchr(bol, '\r', eob -bol)) {
1.72 parser 159: size_t len=eol-bol;
160: if(dest!=bol)
1.126 paf 161: memcpy(dest, bol, len);
1.72 parser 162: dest+=len;
1.126 paf 163: *dest++='\n';
1.72 parser 164:
1.126 paf 165: if(&eol[1]<eob && eol[1]=='\n') { // \r, \n = DOS
1.72 parser 166: bol=eol+2;
1.143.2.21.2. 0(paf 167:3): length--;
1.126 paf 168: } else // \r, not \n = Macintosh
1.72 parser 169: bol=eol+1;
170: }
171: // last piece without \r, including terminating 0
172: if(dest!=bol)
1.126 paf 173: memcpy(dest, bol, eob-bol);
1.72 parser 174: }
1.18 paf 175:
1.143.2.21.2. 5(paf 176:3): char* file_read_text(Request_charsets& charsets,
177:3): const String& file_spec,
178:3): bool fail_on_read_problem,
179:3): HashStringValue* params/*, HashStringValue* * out_fields*/) {
1.143.2.18 paf 180: File_read_result file=
1.143.2.21.2. 5(paf 181:3): file_read(charsets, file_spec, true, params, fail_on_read_problem);
(paf 182:): return file.success?file.str:0;
1.126 paf 183: }
184:
1.143.2.21.2. (paf 185:): #ifdef PA_HTTP
1.126 paf 186: //http request stuff
187:
188: static bool set_addr(struct sockaddr_in *addr, const char* host, const short port){
189: memset(addr, 0, sizeof(*addr));
190: addr->sin_family=AF_INET;
191: addr->sin_port=htons(port);
192: if(host) {
193: if(struct hostent *hostIP=gethostbyname(host))
194: memcpy(&addr->sin_addr, hostIP->h_addr, hostIP->h_length);
195: else
196: return false;
197: } else
198: addr->sin_addr.s_addr=INADDR_ANY;
199: return true;
200: }
201:
1.143.2.21.2. 4(paf 202:3): static int http_read_response(String& response, int sock, bool fail_on_status_ne_200){
1.143.2.2 paf 203: int result=0;
1.143.2.21.2. 2(paf 204:3): size_t EOLat=0;
1.126 paf 205: while(true) {
1.143.2.21.2. (paf 206:): char *buf=new(PointerFreeGC) char[MAX_STRING];
1.126 paf 207: ssize_t size=recv(sock, buf, MAX_STRING, 0);
208: if(size<=0)
209: break;
1.143.2.21.2. 7(paf 210:3): response.append_strdup(buf, size, String::L_TAINTED);
2(paf 211:3): if(!result && (EOLat=response.pos("\r\n", 2))!=STRING_NOT_FOUND) { // checking status in first response
(paf 212:): const String& status_line=response.mid(0, (size_t)EOLat);
1.143.2.15 paf 213: ArrayString astatus;
1.143.2.21.2. 4(paf 214:3): size_t pos_after=0;
215:3): status_line.split(astatus, pos_after, " ");
216:3): const String& status_code=*astatus.get(1);
217:3): result=status_code.as_int();
1.142 paf 218:
1.143.2.3 paf 219: if(fail_on_status_ne_200 && result!=200)
1.142 paf 220: throw Exception("http.status",
1.143.2.21.2. 4(paf 221:3): &status_code,
1.142 paf 222: "invalid HTTP response status");
223: }
224: }
1.143.2.2 paf 225: if(result)
226: return result;
1.142 paf 227: else
228: throw Exception("http.response",
1.143.2.21.2. (paf 229:): 0,
230:): "bad response from host - no status found (size=%lu)", response.length());
1.126 paf 231: }
232:
233: /* ********************** request *************************** */
234:
235: #if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP)
1.143.2.21.2. 4(paf 236:3): # define PA_USE_ALARM
1.126 paf 237: #endif
238:
1.143.2.21.2. 4(paf 239:3): #ifdef PA_USE_ALARM
1.126 paf 240: static sigjmp_buf timeout_env;
241: static void timeout_handler(int sig){
242: siglongjmp(timeout_env, 1);
243: }
244: #endif
245:
1.143.2.21.2. 4(paf 246:3): static int http_request(String& response,
247:3): const char* host, int port,
248:3): const char* request,
249:3): int timeout,
250:3): bool fail_on_status_ne_200) {
1.126 paf 251: if(!host)
252: throw Exception("http.host",
1.143.2.21.2. 4(paf 253:3): 0,
1.126 paf 254: "zero hostname"); //never
255:
1.143.2.21.2. 4(paf 256:3): #ifdef PA_USE_ALARM
257:3): signal(SIGALRM, timeout_handler);
1.126 paf 258: #endif
259: int sock=-1;
1.143.2.21.2. 4(paf 260:3): #ifdef PA_USE_ALARM
261:3): if(sigsetjmp(timeout_env, 1)) {
262:3): // stupid gcc [2.95.4] generated bad code
263:3): // which failed to handle sigsetjmp+throw: crashed inside of pre-throw code.
264:3): // rewritten simplier [though duplicating closesocket code]
265:3): if(sock>=0)
266:3): closesocket(sock);
267:3): throw Exception("http.timeout",
268:3): origin_string,
269:3): "timeout occured while retrieving document");
270:3): return 0; // never
271:3): } else {
272:3): alarm(timeout);
1.126 paf 273: #endif
1.143.2.21.2. 4(paf 274:3): try {
275:3): int result;
1.126 paf 276: struct sockaddr_in dest;
277:
1.143.2.21.2. 4(paf 278:3): if(!set_addr(&dest, host, port))
1.126 paf 279: throw Exception("http.host",
1.143.2.21.2. 4(paf 280:3): 0,
1.127 paf 281: "can not resolve hostname \"%s\"", host);
1.126 paf 282:
283: if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0)
284: throw Exception("http.connect",
1.143.2.21.2. 4(paf 285:3): 0,
1.127 paf 286: "can not make socket: %s (%d)", strerror(errno), errno);
1.126 paf 287: if(connect(sock, (struct sockaddr *)&dest, sizeof(dest)))
288: throw Exception("http.connect",
1.143.2.21.2. 4(paf 289:3): 0,
1.127 paf 290: "can not connect to host \"%s\": %s (%d)", host, strerror(errno), errno);
1.126 paf 291: size_t request_size=strlen(request);
292: if(send(sock, request, request_size, 0)!=(ssize_t)request_size)
293: throw Exception("http.connect",
1.143.2.21.2. 4(paf 294:3): 0,
1.127 paf 295: "error sending request: %s (%d)", strerror(errno), errno);
1.126 paf 296:
1.143.2.21.2. (paf 297:): result=http_read_response(response, sock, fail_on_status_ne_200);
1.142 paf 298: closesocket(sock);
1.143.2.21.2. 4(paf 299:3): #ifdef PA_USE_ALARM
1.142 paf 300: alarm(0);
1.126 paf 301: #endif
1.143.2.21.2. 4(paf 302:3): return result;
303:3): } catch(...) {
304:3): #ifdef PA_USE_ALARM
305:3): alarm(0);
1.126 paf 306: #endif
1.143.2.21.2. 4(paf 307:3): if(sock>=0)
308:3): closesocket(sock);
309:3): rethrow;
310:3): }
311:3): #ifdef PA_USE_ALARM
1.126 paf 312: }
1.143.2.21.2. 4(paf 313:3): #endif
1.126 paf 314: }
315:
1.127 paf 316: #ifndef DOXYGEN
317: struct Http_pass_header_info {
1.143.2.21.2. 5(paf 318:3): Request_charsets* charsets;
1.127 paf 319: String* request;
320: bool user_agent_specified;
321: };
322: #endif
1.143.2.21.2. 5(paf 323:3): static void http_pass_header(HashStringValue::key_type key,
324:3): HashStringValue::value_type value,
4(paf 325:3): Http_pass_header_info *info) {
326:3): *info->request <<key<<": "
5(paf 327:3): << attributed_meaning_to_string(*value, String::L_HTTP_HEADER, false)
328:3): << "\n";
1.135 paf 329:
1.143.2.21.2. 5(paf 330:3): if(String(key, String::L_TAINTED).change_case(info->charsets->source(), String::CC_UPPER)=="USER-AGENT")
331:3): info->user_agent_specified=true;
1.126 paf 332: }
1.143.2.21.2. 5(paf 333:3):
334:3):
335:3): static Charset* detect_charset(Charset& source_charset, const String& content_type_value) {
336:3): const StringBody CONTENT_TYPE_VALUE=
337:3): content_type_value.change_case(source_charset, String::CC_UPPER);
338:3): // content-type: xxx/xxx; source_charset=WE-NEED-THIS
339:3): // content-type: xxx/xxx; source_charset="WE-NEED-THIS"
340:3): // content-type: xxx/xxx; source_charset="WE-NEED-THIS";
341:3): size_t before_charseteq_pos=CONTENT_TYPE_VALUE.pos("CHARSET=");
342:3): if(before_charseteq_pos!=STRING_NOT_FOUND) {
343:3): size_t charset_begin=before_charseteq_pos+8/*CHARSET="*/;
344:3): size_t open_quote_pos=CONTENT_TYPE_VALUE.pos('"', charset_begin);
345:3): bool quoted=open_quote_pos==charset_begin;
346:3): if(quoted)
347:3): charset_begin++; // skip opening '"'
6(paf 348:3): size_t charset_end=CONTENT_TYPE_VALUE.length();
5(paf 349:3): if(quoted) {
350:3): size_t close_quote_pos=CONTENT_TYPE_VALUE.pos('"', charset_begin);
351:3): if(close_quote_pos!=STRING_NOT_FOUND)
352:3): charset_end=close_quote_pos;
353:3): } else {
354:3): size_t delim_pos=CONTENT_TYPE_VALUE.pos(';', charset_begin);
355:3): if(delim_pos!=STRING_NOT_FOUND)
356:3): charset_end=delim_pos;
357:3): }
358:3): const StringBody CHARSET_NAME_BODY=
359:3): CONTENT_TYPE_VALUE.mid(charset_begin, charset_end);
360:3):
361:3): return &charsets.get(CHARSET_NAME_BODY);
362:3): }
363:3):
364:3): return 0;
365:3): }
366:3):
367:3):
1.143.2.16 paf 368: #ifndef DOXYGEN
1.143.2.21 paf 369: struct File_read_http_result {
1.143.2.21.2. 4(paf 370:3): char *str; size_t length;
(paf 371:): HashStringValue* headers;
1.143.2.16 paf 372: };
373: #endif
1.143.2.21.2. 5(paf 374:3): static File_read_http_result file_read_http(Request_charsets& charsets,
375:3): const String& file_spec,
4(paf 376:3): HashStringValue *options=0) {
1.143.2.21 paf 377: File_read_http_result result;
1.126 paf 378: char host[MAX_STRING];
1.129 paf 379: const char* uri;
1.126 paf 380: int port;
1.143.2.21.2. 4(paf 381:3): const char* method=0;
1.126 paf 382: int timeout=2;
1.142 paf 383: bool fail_on_status_ne_200=true;
1.143.2.21.2. 4(paf 384:3): Value* vheaders=0;
5(paf 385:3): Charset *asked_remote_charset=0;
1.126 paf 386:
1.127 paf 387: if(options) {
388: int valid_options=0;
1.143.2.21.2. (paf 389:): if(Value* vmethod=options->get(http_method_name)) {
1.127 paf 390: valid_options++;
1.143.2.21.2. (paf 391:): method=vmethod->as_string().cstr();
1.127 paf 392: }
1.143.2.21.2. (paf 393:): if(Value* vtimeout=options->get(http_timeout_name)) {
1.127 paf 394: valid_options++;
395: timeout=vtimeout->as_int();
396: }
1.143.2.3 paf 397: if(vheaders=options->get(http_headers_name)) {
1.127 paf 398: valid_options++;
399: }
1.143.2.21.2. (paf 400:): if(Value* vany_status=options->get(http_any_status_name)) {
1.142 paf 401: valid_options++;
402: fail_on_status_ne_200=!vany_status->as_bool();
403: }
1.143.2.21.2. 5(paf 404:3): if(Value* vcharset_name=options->get(http_charset_name)) {
405:3): valid_options++;
406:3): asked_remote_charset=&::charsets.get(vcharset_name->as_string().
407:3): change_case(charsets.source(), String::CC_UPPER));
408:3): }
1.142 paf 409:
1.143.2.3 paf 410: if(valid_options!=options->count())
1.127 paf 411: throw Exception("parser.runtime",
1.143.2.21.2. (paf 412:): 0,
1.127 paf 413: "invalid option passed");
1.143.2.21.2. 5(paf 414:3): }
415:3): if(!asked_remote_charset) // defaulting to $request:charset
416:3): asked_remote_charset=&charsets.source();
1.126 paf 417:
1.143.2.21.2. 6(paf 418:3): //preparing request
419:3): String& connect_string=*new String;
420:3): // not in ^sql{... L_SQL ...} spirit, but closer to ^file::load one
421:3): connect_string.append(file_spec, String::L_URI); // tainted pieces -> URI pieces
422:3):
5(paf 423:3): const char* request_cstr;
424:3): {
425:3): // influence URLencoding of tainted pieces to String::L_URI lang
426:3): Temp_client_charset temp(charsets, *asked_remote_charset);
427:3):
6(paf 428:3): const char* connect_string_cstr=connect_string.cstr(String::L_UNSPECIFIED);
429:3):
430:3): const char* current=connect_string_cstr;
431:3): if(strncmp(current, "http://", 7)!=0)
432:3): throw Exception(0,
433:3): &connect_string,
434:3): "does not start with http://"); //never
435:3): current+=7;
436:3):
437:3): strncpy(host, current, sizeof(host)-1); host[sizeof(host)-1]=0;
438:3): char* host_uri=lsplit(host, '/');
439:3): uri=host_uri?current+(host_uri-1-host):"/";
440:3): char* port_cstr=lsplit(host, ':');
441:3): char* error_pos=0;
442:3): port=port_cstr?strtol(port_cstr, &error_pos, 0):80;
443:3):
444:3):
445:3): //making request
446:3): String request;
447:3): if(method)
448:3): request<<method;
449:3): else
450:3): request<<"GET";
451:3): request<< " "<< uri <<" HTTP/1.0\n"
452:3): "host: "<< host <<"\n";
453:3): bool user_agent_specified=false;
454:3): if(vheaders && !vheaders->is_string()) { // allow empty
455:3): if(HashStringValue *headers=vheaders->get_hash()) {
456:3): Http_pass_header_info info={&charsets, &request};
457:3): headers->for_each(http_pass_header, &info);
458:3): user_agent_specified=info.user_agent_specified;
459:3): } else
460:3): throw Exception("parser.runtime",
461:3): &connect_string,
462:3): "headers param must be hash");
463:3): };
464:3): if(!user_agent_specified) // defaulting
465:3): request << "user-agent: " DEFAULT_USER_AGENT "\n";
466:3): request<<"\n";
5(paf 467:3):
6(paf 468:3): request_cstr=request.cstr(String::L_UNSPECIFIED);
5(paf 469:3): }
6(paf 470:3): // recode those pieces which are not in String::L_URI lang
471:3): // [those violating HTTP standard, but widly used]
472:3): request_cstr=Charset::transcode(
473:3): String::C(request_cstr, strlen(request_cstr)),
474:3): charsets.source(),
475:3): *asked_remote_charset);
476:3):
477:3): //sending request
478:3): String response;
(paf 479:): int status_code=http_request(response,
4(paf 480:3): host, port, request_cstr,
1.142 paf 481: timeout, fail_on_status_ne_200);
1.126 paf 482:
483: //processing results
1.143.2.21.2. 2(paf 484:3): size_t pos=response.pos("\r\n\r\n", 4);
5(paf 485:3): if(pos==STRING_NOT_FOUND || pos<1) {
1.126 paf 486: throw Exception("http.response",
1.143.2.21.2. 4(paf 487:3): &connect_string,
1.126 paf 488: "bad response from host - no headers found");
489: }
1.143.2.21.2. (paf 490:): const String& header_block=response.mid(0, pos);
5(paf 491:3): const String& raw_body=response.mid(pos+4, response.length());
1.126 paf 492:
1.143.2.15 paf 493: ArrayString aheaders;
1.143.2.21.2. 4(paf 494:3): result.headers=new HashStringValue;
495:3): size_t pos_after=0;
496:3): header_block.split(aheaders, pos_after, "\r\n");
1.126 paf 497:
498: //processing headers
1.143.2.21.2. 6(paf 499:3): size_t aheaders_count=aheaders.count();
5(paf 500:3): Charset* real_remote_charset=0; // undetected, yet
6(paf 501:3): for(size_t i=1; i<aheaders_count; i++) {
4(paf 502:3): const String& line=*aheaders.get(i);
503:3): pos=line.pos(": ", 2);
2(paf 504:3): if(pos==STRING_NOT_FOUND || pos<1)
1.126 paf 505: throw Exception("http.response",
1.143.2.21.2. 4(paf 506:3): &connect_string,
507:3): "bad response from host - bad header \"%s\"", line.cstr());
5(paf 508:3): const StringBody HEADER_NAME=
509:3): line.mid(0, pos).change_case(charsets.source(), String::CC_UPPER);
510:3): const String& header_value=line.mid(pos+2, line.length());
6(paf 511:3): if(HEADER_NAME=="CONTENT-TYPE")
5(paf 512:3): real_remote_charset=detect_charset(charsets.source(), header_value);
513:3): result.headers->put(HEADER_NAME, new VString(header_value));
1.126 paf 514: }
1.143.2.21.2. 5(paf 515:3): // defaulting to used-asked charset [it's never empty!]
516:3): if(!real_remote_charset)
517:3): real_remote_charset=asked_remote_charset;
1.126 paf 518:
519: // output response
1.143.2.21.2. 5(paf 520:3): String::C real_body=Charset::transcode(
521:3): String::C(raw_body.cstrm()/*must be modifiable*/, raw_body.length()),
522:3): *real_remote_charset,
523:3): charsets.source());
524:3):
525:3): result.str=const_cast<char *>(real_body.str); // hacking a little
526:3): result.length=real_body.length;
4(paf 527:3): result.headers->put(file_status_name, new VInt(status_code));
1.143.2.16 paf 528: return result;
1.34 paf 529: }
1.123 paf 530:
1.143.2.21.2. (paf 531:): #endif
532:):
1.123 paf 533: #ifndef DOXYGEN
534: struct File_read_action_info {
1.143.2.4 paf 535: char **data; size_t *data_size;
1.126 paf 536: };
1.123 paf 537: #endif
1.143.2.21.2. (paf 538:): static void file_read_action(
6(paf 539:3): struct stat& finfo,
540:3): int f,
541:3): const String& file_spec, const char* fname, bool as_text,
542:3): void *context) {
1.126 paf 543: File_read_action_info& info=*static_cast<File_read_action_info *>(context);
1.123 paf 544: if(size_t to_read_size=(size_t)finfo.st_size) {
1.143.2.21.2. (paf 545:): *info.data=new(PointerFreeGC) char[to_read_size+(as_text?1:0)];
1.126 paf 546: *info.data_size=(size_t)read(f, *info.data, to_read_size);
1.123 paf 547:
548: if(ssize_t(*info.data_size)<0 || *info.data_size>to_read_size)
1.126 paf 549: throw Exception(0,
1.143.2.21.2. (paf 550:): &file_spec,
1.123 paf 551: "read failed: actually read %lu bytes count not in [0..%lu] valid range",
1.126 paf 552: *info.data_size, to_read_size);
1.123 paf 553: } else { // empty file
554: if(as_text) {
1.143.2.21.2. (paf 555:): *info.data=new(PointerFreeGC) char[1];
1.123 paf 556: *(char*)(*info.data)=0;
557: } else
558: *info.data=0;
559: *info.data_size=0;
560: return;
561: }
1.126 paf 562: }
1.143.2.21.2. 5(paf 563:3): File_read_result file_read(Request_charsets& charsets, const String& file_spec,
1.143.2.16 paf 564: bool as_text, HashStringValue *params,
1.126 paf 565: bool fail_on_read_problem) {
1.143.2.21.2. 1(paf 566:3): File_read_result result={false};
(paf 567:): #ifdef PA_HTTP
4(paf 568:3): if(file_spec.starts_with("http://")) {
1.126 paf 569: // fail on read problem
1.143.2.21.2. 5(paf 570:3): File_read_http_result http=file_read_http(charsets, file_spec, params);
1.143.2.4 paf 571: result.success=true;
1.143.2.21.2. 1(paf 572:3): result.str=http.str;
573:3): result.length=http.length;
2(paf 574:3): result.headers=http.headers;
1.126 paf 575: } else {
1.143.2.21.2. (paf 576:): #endif
577:): File_read_action_info info={&result.str, &result.length};
578:): result.success=file_read_action_under_lock(file_spec,
1.126 paf 579: "read", file_read_action, &info,
580: as_text, fail_on_read_problem);
1.143.2.21.2. (paf 581:): #ifdef PA_HTTP
1.126 paf 582: }
1.143.2.21.2. (paf 583:): #endif
1.123 paf 584:
1.143.2.4 paf 585: if(result.success && as_text) {
1.131 paf 586: // UTF-8 signature: EF BB BF
1.143.2.21.2. (paf 587:): if(result.length>=3) {
588:): char *in=(char *)result.str;
2(paf 589:3): if(strncmp(in, "\xEB\xBB\xBF", 3)==0) {
(paf 590:): result.str=in+3; result.length-=3;// skip prefix
1.131 paf 591: }
592: }
593:
1.143.2.21.2. (paf 594:): fix_line_breaks((char *)(result.str), result.length);
1.123 paf 595: // note: after fixing
1.143.2.21.2. (paf 596:): ((char*&)(result.str))[result.length]=0;
1.123 paf 597: }
1.126 paf 598:
599: return result;
1.123 paf 600: }
601:
1.143.2.21.2. 3(paf 602:3): #ifdef PA_SAFE_MODE
603:3): void check_safe_mode(stat finfo, const String& file_spec, const char* fname) {
604:3): if(finfo.st_uid/*foreign?*/!=geteuid()
605:3): && finfo.st_gid/*foreign?*/!=getegid())
606:3): throw Exception("parser.runtime",
607:3): &file_spec,
608:3): "parser is in safe mode: "
609:3): "reading files of foreign group and user disabled "
610:3): "[recompile parser with --disable-safe-mode configure option], "
611:3): "actual filename '%s', "
612:3): "fuid(%d)!=euid(%d) or fgid(%d)!=egid(%d)",
613:3): fname,
614:3): finfo.st_uid, geteuid(),
615:3): finfo.st_gid, getegid());
616:3): }
617:3): #endif
618:3):
(paf 619:): bool file_read_action_under_lock(const String& file_spec,
1.126 paf 620: const char* action_name, File_read_action action, void *context,
621: bool as_text,
1.123 paf 622: bool fail_on_read_problem) {
1.143.2.21.2. (paf 623:): const char* fname=file_spec.cstr(String::L_FILE_SPEC);
1.33 paf 624: int f;
625:
626: // first open, next stat:
1.45 paf 627: // directory update of NTFS hard links performed on open.
1.33 paf 628: // ex:
629: // a.html:^test[] and b.html hardlink to a.html
630: // user inserts ! before ^test in a.html
1.126 paf 631: // directory entry of b.html in NTFS not updated at once,
1.35 paf 632: // they delay update till open, so we would receive "!^test[" string
633: // if would do stat, next open.
1.123 paf 634: // later: it seems, even this does not help sometimes
1.98 paf 635: if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) {
1.123 paf 636: try {
637: if(lock_shared_blocking(f)!=0)
1.126 paf 638: throw Exception("file.lock",
1.143.2.21.2. (paf 639:): &file_spec,
1.123 paf 640: "shared lock failed: %s (%d), actual filename '%s'",
1.143.2.21.2. (paf 641:): strerror(errno), errno, fname);
1.123 paf 642:
1.124 paf 643: struct stat finfo;
644: if(stat(fname, &finfo)!=0)
645: throw Exception("file.missing", // hardly possible: we just opened it OK
1.143.2.21.2. (paf 646:): &file_spec,
1.124 paf 647: "stat failed: %s (%d), actual filename '%s'",
1.143.2.21.2. (paf 648:): strerror(errno), errno, fname);
1.124 paf 649:
1.140 paf 650: #ifdef PA_SAFE_MODE
1.143.2.21.2. 3(paf 651:3): check_safe_mode(finfo, file_spec, fname);
1.105 paf 652: #endif
1.32 paf 653:
1.143.2.21.2. (paf 654:): action(finfo, f, file_spec, fname, as_text, context);
1.123 paf 655: } catch(...) {
1.126 paf 656: unlock(f);close(f);
1.123 paf 657: if(fail_on_read_problem)
1.143.2.11 paf 658: rethrow;
1.123 paf 659: return false;
660: }
1.87 paf 661:
1.126 paf 662: unlock(f);close(f);
1.72 parser 663: return true;
1.118 paf 664: } else {
665: if(fail_on_read_problem)
1.126 paf 666: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.143.2.21.2. (paf 667:): &file_spec,
1.123 paf 668: "%s failed: %s (%d), actual filename '%s'",
1.143.2.21.2. (paf 669:): action_name, strerror(errno), errno, fname);
1.118 paf 670: return false;
671: }
1.8 paf 672: }
673:
1.143.2.21.2. (paf 674:): static void create_dir_for_file(const String& file_spec) {
1.63 parser 675: size_t pos_after=1;
1.143.2.21.2. 2(paf 676:3): size_t pos_before;
3(paf 677:3): while((pos_before=file_spec.pos('/', pos_after))!=STRING_NOT_FOUND) {
(paf 678:): mkdir(file_spec.mid(0, pos_before).cstr(String::L_FILE_SPEC), 0775);
1.63 parser 679: pos_after=pos_before+1;
680: }
681: }
682:
1.98 paf 683: bool file_write_action_under_lock(
1.143.2.21.2. (paf 684:): const String& file_spec,
1.126 paf 685: const char* action_name, File_write_action action, void *context,
686: bool as_text,
687: bool do_append,
688: bool do_block,
1.110 paf 689: bool fail_on_lock_problem) {
1.143.2.21.2. (paf 690:): const char* fname=file_spec.cstr(String::L_FILE_SPEC);
1.28 paf 691: int f;
1.80 paf 692: if(access(fname, W_OK)!=0) // no
1.126 paf 693: create_dir_for_file(file_spec);
1.50 paf 694:
1.80 paf 695: if((f=open(fname,
696: O_CREAT|O_RDWR
697: |(as_text?_O_TEXT:_O_BINARY)
1.138 paf 698: |(do_append?O_APPEND:PA_O_TRUNC), 0664))>=0) {
1.99 paf 699: if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) {
1.126 paf 700: Exception e("file.lock",
1.143.2.21.2. (paf 701:): &file_spec,
1.110 paf 702: "shared lock failed: %s (%d), actual filename '%s'",
1.143.2.21.2. (paf 703:): strerror(errno), errno, fname);
1.126 paf 704: close(f);
1.110 paf 705: if(fail_on_lock_problem)
706: throw e;
1.98 paf 707: return false;
708: }
1.96 paf 709:
710: try {
1.126 paf 711: action(f, context);
1.96 paf 712: } catch(...) {
1.138 paf 713: #ifdef HAVE_FTRUNCATE
1.104 paf 714: if(!do_append)
1.125 paf 715: ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower
1.138 paf 716: #endif
1.126 paf 717: unlock(f);close(f);
1.143.2.11 paf 718: rethrow;
1.96 paf 719: }
1.80 paf 720:
1.138 paf 721: #ifdef HAVE_FTRUNCATE
1.104 paf 722: if(!do_append)
1.125 paf 723: 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 724: #endif
1.126 paf 725: unlock(f);close(f);
1.98 paf 726: return true;
1.80 paf 727: } else
1.126 paf 728: throw Exception(errno==EACCES?"file.access":0,
1.143.2.21.2. (paf 729:): &file_spec,
1.96 paf 730: "%s failed: %s (%d), actual filename '%s'",
1.143.2.21.2. (paf 731:): action_name, strerror(errno), errno, fname);
1.96 paf 732: // here should be nothing, see rethrow above
733: }
734:
735: #ifndef DOXYGEN
736: struct File_write_action_info {
1.143.2.21.2. (paf 737:): const char* str; size_t length;
1.126 paf 738: };
1.96 paf 739: #endif
740: static void file_write_action(int f, void *context) {
1.126 paf 741: File_write_action_info& info=*static_cast<File_write_action_info *>(context);
1.143.2.21.2. (paf 742:): if(info.length) {
743:): int written=write(f, info.str, info.length);
1.116 paf 744: if(written<0)
1.126 paf 745: throw Exception(0,
1.143.2.21.2. (paf 746:): 0,
1.126 paf 747: "write failed: %s (%d)", strerror(errno), errno);
1.113 paf 748: }
1.96 paf 749: }
750: void file_write(
1.143.2.21.2. (paf 751:): const String& file_spec,
752:): const char* data, size_t size,
1.126 paf 753: bool as_text,
1.96 paf 754: bool do_append) {
1.126 paf 755: File_write_action_info info={data, size};
1.98 paf 756: file_write_action_under_lock(
1.143.2.4 paf 757: file_spec,
758: "write", file_write_action, &info,
759: as_text,
760: do_append);
1.30 paf 761: }
762:
1.63 parser 763: // throws nothing! [this is required in file_move & file_delete]
1.143.2.21.2. (paf 764:): static void rmdir(const String& file_spec, size_t pos_after) {
2(paf 765:3): size_t pos_before;
3(paf 766:3): if((pos_before=file_spec.pos('/', pos_after))!=STRING_NOT_FOUND)
1.126 paf 767: rmdir(file_spec, pos_before+1);
1.50 paf 768:
1.143.2.21.2. (paf 769:): rmdir(file_spec.mid(0, pos_after-1/* / */).cstr(String::L_FILE_SPEC));
1.50 paf 770: }
1.143.2.21.2. (paf 771:): bool file_delete(const String& file_spec, bool fail_on_read_problem) {
772:): const char* fname=file_spec.cstr(String::L_FILE_SPEC);
1.54 parser 773: if(unlink(fname)!=0)
1.93 paf 774: if(fail_on_read_problem)
1.126 paf 775: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.143.2.21.2. (paf 776:): &file_spec,
1.93 paf 777: "unlink failed: %s (%d), actual filename '%s'",
1.143.2.21.2. (paf 778:): strerror(errno), errno, fname);
1.93 paf 779: else
780: return false;
1.50 paf 781:
1.126 paf 782: rmdir(file_spec, 1);
1.93 paf 783: return true;
1.60 parser 784: }
1.143.2.21.2. (paf 785:): void file_move(const String& old_spec, const String& new_spec) {
786:): const char* old_spec_cstr=old_spec.cstr(String::L_FILE_SPEC);
787:): const char* new_spec_cstr=new_spec.cstr(String::L_FILE_SPEC);
1.63 parser 788:
1.126 paf 789: create_dir_for_file(new_spec);
1.63 parser 790:
1.60 parser 791: if(rename(old_spec_cstr, new_spec_cstr)!=0)
1.126 paf 792: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.143.2.21.2. (paf 793:): &old_spec,
1.60 parser 794: "rename failed: %s (%d), actual filename '%s' to '%s'",
1.143.2.21.2. (paf 795:): strerror(errno), errno, old_spec_cstr, new_spec_cstr);
1.63 parser 796:
1.126 paf 797: rmdir(old_spec, 1);
1.31 paf 798: }
799:
1.51 paf 800:
1.126 paf 801: bool entry_exists(const char* fname, struct stat *afinfo) {
1.118 paf 802: struct stat lfinfo;
803: bool result=stat(fname, &lfinfo)==0;
804: if(afinfo)
805: *afinfo=lfinfo;
806: return result;
1.119 paf 807: }
808:
1.143.2.21.2. (paf 809:): bool entry_exists(const String& file_spec) {
810:): const char* fname=file_spec.cstr(String::L_FILE_SPEC);
1.126 paf 811: return entry_exists(fname, 0);
1.118 paf 812: }
813:
1.143.2.21.2. (paf 814:): static bool entry_readable(const String& file_spec, bool need_dir) {
815:): char* fname=file_spec.cstrm(String::L_FILE_SPEC);
1.120 paf 816: if(need_dir) {
1.126 paf 817: size_t size=strlen(fname);
1.120 paf 818: while(size) {
1.126 paf 819: char c=fname[size-1];
1.120 paf 820: if(c=='/' || c=='\\')
821: fname[--size]=0;
822: else
823: break;
824: }
825: }
1.51 paf 826: struct stat finfo;
1.118 paf 827: if(access(fname, R_OK)==0 && entry_exists(fname, &finfo)) {
1.109 paf 828: bool is_dir=(finfo.st_mode&S_IFDIR) != 0;
1.51 paf 829: return is_dir==need_dir;
830: }
831: return false;
832: }
1.143.2.21.2. (paf 833:): bool file_readable(const String& file_spec) {
1.126 paf 834: return entry_readable(file_spec, false);
1.51 paf 835: }
1.143.2.21.2. (paf 836:): bool dir_readable(const String& file_spec) {
1.126 paf 837: return entry_readable(file_spec, true);
1.65 parser 838: }
1.143.2.21.2. 0(paf 839:3): const String* file_readable(const String& path, const String& name) {
(paf 840:): String& result=*new String(path);
841:): result << "/";
842:): result << name;
843:): return file_readable(result)?&result:0;
1.43 paf 844: }
1.143.2.21.2. (paf 845:): bool file_executable(const String& file_spec) {
846:): return access(file_spec.cstr(String::L_FILE_SPEC), X_OK)==0;
1.44 paf 847: }
848:
1.143.2.21.2. (paf 849:): bool file_stat(const String& file_spec,
1.58 parser 850: size_t& rsize,
1.126 paf 851: time_t& ratime,
852: time_t& rmtime,
853: time_t& rctime,
1.64 parser 854: bool fail_on_read_problem) {
1.143.2.21.2. (paf 855:): const char* fname=file_spec.cstr(String::L_FILE_SPEC);
5(paf 856:3): struct stat finfo;
1.44 paf 857: if(stat(fname, &finfo)!=0)
1.64 parser 858: if(fail_on_read_problem)
1.126 paf 859: throw Exception("file.missing",
1.143.2.21.2. (paf 860:): &file_spec,
1.67 parser 861: "getting file size failed: %s (%d), real filename '%s'",
1.143.2.21.2. (paf 862:): strerror(errno), errno, fname);
1.64 parser 863: else
864: return false;
1.58 parser 865: rsize=finfo.st_size;
866: ratime=finfo.st_atime;
867: rmtime=finfo.st_mtime;
868: rctime=finfo.st_ctime;
1.64 parser 869: return true;
1.18 paf 870: }
871:
1.126 paf 872: char* getrow(char* *row_ref, char delim) {
873: char* result=*row_ref;
1.8 paf 874: if(result) {
1.126 paf 875: *row_ref=strchr(result, delim);
1.8 paf 876: if(*row_ref)
877: *((*row_ref)++)=0;
878: else if(!*result)
879: return 0;
880: }
881: return result;
882: }
883:
1.126 paf 884: char* lsplit(char* string, char delim) {
1.23 paf 885: if(string) {
1.126 paf 886: char* v=strchr(string, delim);
1.8 paf 887: if(v) {
888: *v=0;
889: return v+1;
890: }
891: }
892: return 0;
893: }
894:
1.126 paf 895: char* lsplit(char* *string_ref, char delim) {
896: char* result=*string_ref;
897: char* next=lsplit(*string_ref, delim);
1.8 paf 898: *string_ref=next;
899: return result;
1.9 paf 900: }
901:
1.126 paf 902: char* rsplit(char* string, char delim) {
1.18 paf 903: if(string) {
1.126 paf 904: char* v=strrchr(string, delim);
1.18 paf 905: if(v) {
1.9 paf 906: *v=0;
907: return v+1;
908: }
909: }
910: return NULL;
1.10 paf 911: }
912:
1.37 paf 913: /// @todo less stupid type detection
1.143.2.21.2. (paf 914:): const char* format(double value, char* fmt) {
1.126 paf 915: char local_buf[MAX_NUMBER];
1.108 paf 916: size_t size;
917:
1.10 paf 918: if(fmt)
919: if(strpbrk(fmt, "diouxX"))
920: if(strpbrk(fmt, "ouxX"))
1.126 paf 921: size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value);
1.10 paf 922: else
1.126 paf 923: size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value);
1.10 paf 924: else
1.126 paf 925: size=snprintf(local_buf, sizeof(local_buf), fmt, value);
1.10 paf 926: else
1.126 paf 927: size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value);
1.10 paf 928:
1.143.2.21.2. (paf 929:): return pa_strdup(local_buf, size);
1.12 paf 930: }
931:
1.36 paf 932: size_t stdout_write(const void *buf, size_t size) {
1.12 paf 933: #ifdef WIN32
934: do{
1.143.2.21.2. (paf 935:): int chunk_written=fwrite(buf, 1, min((size_t)8*0x400, size), stdout);
1.12 paf 936: if(chunk_written<=0)
937: break;
938: size-=chunk_written;
1.36 paf 939: buf=((const char*)buf)+chunk_written;
1.126 paf 940: } while(size>0);
1.12 paf 941:
942: return size;
943: #else
1.126 paf 944: return fwrite(buf, 1, size, stdout);
1.12 paf 945: #endif
1.2 paf 946: }
1.14 paf 947:
1.143.2.21.2. (paf 948:): char* unescape_chars(const char* cp, int len) {
949:): char* s=new(PointerFreeGC) char[len + 1];
1.14 paf 950: enum EscapeState {
1.33 paf 951: EscapeRest,
952: EscapeFirst,
1.14 paf 953: EscapeSecond
954: } escapeState=EscapeRest;
955: int escapedValue=0;
956: int srcPos=0;
957: int dstPos=0;
958: while(srcPos < len) {
1.126 paf 959: int ch=cp[srcPos];
1.14 paf 960: switch(escapeState) {
961: case EscapeRest:
962: if(ch=='%') {
963: escapeState=EscapeFirst;
964: } else if(ch=='+') {
1.126 paf 965: s[dstPos++]=' ';
1.14 paf 966: } else {
967: s[dstPos++]=ch;
968: }
969: break;
970: case EscapeFirst:
971: escapedValue=hex_value[ch] << 4;
972: escapeState=EscapeSecond;
973: break;
974: case EscapeSecond:
1.126 paf 975: escapedValue +=hex_value[ch];
1.14 paf 976: s[dstPos++]=escapedValue;
977: escapeState=EscapeRest;
978: break;
979: }
1.126 paf 980: srcPos++;
1.14 paf 981: }
982: s[dstPos]=0;
983: return s;
1.24 paf 984: }
985:
986: #ifdef WIN32
1.126 paf 987: void back_slashes_to_slashes(char* s) {
1.24 paf 988: if(s)
989: for(; *s; s++)
990: if(*s=='\\')
1.126 paf 991: *s='/';
1.24 paf 992: }
1.42 paf 993: /*
1.126 paf 994: void slashes_to_back_slashes(char* s) {
1.42 paf 995: if(s)
996: for(; *s; s++)
997: if(*s=='/')
1.126 paf 998: *s='\\';
1.42 paf 999: }
1000: */
1.24 paf 1001: #endif
1.41 paf 1002:
1.126 paf 1003: bool StrEqNc(const char* s1, const char* s2, bool strict) {
1.41 paf 1004: while(true) {
1005: if(!(*s1)) {
1006: if(!(*s2))
1007: return true;
1008: else
1009: return !strict;
1010: } else if(!(*s2))
1011: return !strict;
1012: if(isalpha(*s1)) {
1013: if(tolower(*s1) !=tolower(*s2))
1014: return false;
1015: } else if((*s1) !=(*s2))
1016: return false;
1.126 paf 1017: s1++;
1018: s2++;
1.41 paf 1019: }
1.57 parser 1020: }
1021:
1.84 paf 1022: static bool isLeap(int year) {
1.57 parser 1023: return !(
1024: (year % 4) || ((year % 400) && !(year % 100))
1.126 paf 1025: );
1.57 parser 1026: }
1027:
1028: int getMonthDays(int year, int month) {
1029: int monthDays[]={
1.126 paf 1030: 31,
1031: isLeap(year) ? 29 : 28,
1032: 31,
1033: 30,
1034: 31,
1035: 30,
1036: 31,
1037: 31,
1038: 30,
1039: 31,
1040: 30,
1.57 parser 1041: 31
1.126 paf 1042: };
1043: return monthDays[month];
1.41 paf 1044: }
1.69 parser 1045:
1.126 paf 1046: void remove_crlf(char* start, char* end) {
1047: for(char* p=start; p<end; p++)
1.69 parser 1048: switch(*p) {
1.126 paf 1049: case '\n': *p='|'; break;
1050: case '\r': *p=' '; break;
1.69 parser 1051: }
1.91 paf 1052: }
1053:
1054:
1055: /// must be last in this file
1056: #undef vsnprintf
1.126 paf 1057: int __vsnprintf(char* b, size_t s, const char* f, va_list l) {
1.91 paf 1058: if(!s)
1059: return 0;
1060:
1061: int r;
1062: // note: on win32& maybe somewhere else
1063: // vsnprintf do not writes terminating 0 in 'buffer full' case, reducing
1064: --s;
1065: #if _MSC_VER
1066: /*
1067: win32:
1068: mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm
1069:
1.143.2.12 paf 1070: if the number of bytes to write exceeds buffer, then count bytes are written and Ö1 is returned
1.91 paf 1071: */
1.126 paf 1072: r=_vsnprintf(b, s, f, l);
1.91 paf 1073: if(r<0)
1074: r=s;
1075: #else
1.126 paf 1076: r=vsnprintf(b, s, f, l);
1.91 paf 1077: /*
1078: solaris:
1079: man vsnprintf
1080:
1081: The snprintf() function returns the number of characters
1082: formatted, that is, the number of characters that would have
1083: been written to the buffer if it were large enough. If the
1084: value of n is 0 on a call to snprintf(), an unspecified
1085: value less than 1 is returned.
1086: */
1087:
1088: if(r<0)
1089: r=0;
1090: else if(r>s)
1091: r=s;
1092: #endif
1093: b[r]=0;
1094: return r;
1095: }
1096:
1.126 paf 1097: int __snprintf(char* b, size_t s, const char* f, ...) {
1.91 paf 1098: va_list l;
1.126 paf 1099: va_start(l, f);
1100: int r=__vsnprintf(b, s, f, l);
1101: va_end(l);
1.91 paf 1102: return r;
1.98 paf 1103: }
1104:
1105: int pa_sleep(unsigned long secs, unsigned long usecs) {
1.126 paf 1106: for (; usecs >= 1000000; ++secs, usecs -= 1000000);
1.98 paf 1107:
1108: #ifdef WIN32
1.126 paf 1109: Sleep(secs * 1000 + usecs / 1000);
1.98 paf 1110: return 0;
1111: #else
1112: struct timeval t;
1113: t.tv_sec = secs;
1114: t.tv_usec = usecs;
1.126 paf 1115: return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0);
1.98 paf 1116: #endif
1.135 paf 1117: }
1118:
1119:
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