Annotation of parser3/src/main/pa_common.C, revision 1.108
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)
1.16 paf 6:
1.108 ! paf 7: $Id: pa_common.C,v 1.107 2002/03/28 11:50:14 paf Exp $
1.1 paf 8: */
9:
10: #include "pa_common.h"
1.2 paf 11: #include "pa_types.h"
1.4 paf 12: #include "pa_exception.h"
1.14 paf 13: #include "pa_pool.h"
14: #include "pa_globals.h"
15: #include "pa_value.h"
16: #include "pa_hash.h"
17: #include "pa_string.h"
1.1 paf 18:
1.98 paf 19: #ifdef WIN32
20: # include <windows.h>
21: #endif
22:
1.93 paf 23: // some maybe-undefined constants
24:
1.82 paf 25: #ifndef _O_TEXT
26: # define _O_TEXT 0
27: #endif
28: #ifndef _O_BINARY
29: # define _O_BINARY 0
1.47 paf 30: #endif
1.80 paf 31: #ifndef O_TRUNC
32: # define O_TRUNC 0
33: #endif
34:
1.93 paf 35: // locking constants
36:
1.99 paf 37: #ifdef HAVE_FLOCK
38:
39: static int lock_shared_blocking(int fd) { return flock(fd, LOCK_SH); }
40: static int lock_exclusive_blocking(int fd) { return flock(fd, LOCK_EX); }
41: static int lock_exclusive_nonblocking(int fd) { return flock(fd, LOCK_EX || LOCK_NB); }
42: static int unlock(int fd) { return flock(fd, LOCK_UN); }
43:
1.98 paf 44: #else
1.99 paf 45: #ifdef HAVE__LOCKING
1.98 paf 46:
1.99 paf 47: #define FLOCK(operation) lseek(fd, 0, SEEK_SET); return _locking(fd, operation, 1)
48: static int lock_shared_blocking(int fd) { FLOCK(_LK_LOCK); }
49: static int lock_exclusive_blocking(int fd) { FLOCK(_LK_LOCK); }
50: static int lock_exclusive_nonblocking(int fd) { FLOCK(_LK_NBLCK); }
51: static int unlock(int fd) { FLOCK(_LK_UNLCK); }
1.93 paf 52:
1.99 paf 53: #else
54: #ifdef HAVE_FCNTL
1.93 paf 55:
1.99 paf 56: #define FLOCK(cmd, arg) struct flock ls={arg, SEEK_SET}; return fcntl(fd, cmd, &ls)
57: static int lock_shared_blocking(int fd) { FLOCK(F_SETLKW, F_RDLCK); }
58: static int lock_exclusive_blocking(int fd) { FLOCK(F_SETLKW, F_WRLCK); }
59: static int lock_exclusive_nonblocking(int fd) { FLOCK(F_SETLK, F_RDLCK); }
60: static int unlock(int fd) { FLOCK(F_SETLK, F_UNLCK); }
1.93 paf 61:
62: #else
63: #ifdef HAVE_LOCKF
1.99 paf 64:
65: #define FLOCK(fd, operation) lseek(fd, 0, SEEK_SET); return lockf(fd, operation, 1)
66: static int lock_shared_blocking(int fd) { FLOCK(F_LOCK); } // on intel solaris man doesn't have doc on shared blocking
67: static int lock_exclusive_blocking(int fd) { FLOCK(F_LOCK); }
68: static int lock_exclusive_nonblocking(int fd) { FLOCK(F_TLOCK); }
69: static int unlock(int fd) { FLOCK(F_TLOCK); }
70:
1.93 paf 71: #else
1.99 paf 72:
73: #error unable to find file locking func
74:
75: #endif
1.93 paf 76: #endif
77: #endif
78: #endif
79:
1.86 paf 80: static char *strnchr(char *buf, size_t size, char c) {
1.103 paf 81: // sanity check
82: if(!buf)
83: return 0;
84:
1.86 paf 85: for(; size-->0; buf++) {
86: if(*buf==c)
87: return buf;
88: }
89:
90: return 0;
91: }
92:
93: void fix_line_breaks(char *buf, size_t& size) {
1.87 paf 94: //_asm int 3;
1.86 paf 95: const char * const eob=buf+size;
1.87 paf 96: char *dest=buf;
1.72 parser 97: // fix DOS: \r\n -> \n
98: // fix Macintosh: \r -> \n
1.87 paf 99: char *bol=buf;
1.86 paf 100: while(char *eol=strnchr(bol, eob -bol, '\r')) {
1.72 parser 101: size_t len=eol-bol;
102: if(dest!=bol)
103: memcpy(dest, bol, len);
104: dest+=len;
105: *dest++='\n';
106:
1.87 paf 107: if(&eol[1]<eob && eol[1]=='\n') { // \r,\n = DOS
1.72 parser 108: bol=eol+2;
109: size--;
110: } else // \r,not \n = Macintosh
111: bol=eol+1;
112: }
113: // last piece without \r, including terminating 0
114: if(dest!=bol)
1.87 paf 115: memcpy(dest, bol, eob-bol);
1.72 parser 116: }
1.18 paf 117:
1.28 paf 118: char *file_read_text(Pool& pool, const String& file_spec, bool fail_on_read_problem) {
1.72 parser 119: void *result; size_t size;
120: return file_read(pool, file_spec, result, size, true, fail_on_read_problem)?(char *)result:0;
1.34 paf 121: }
122: bool file_read(Pool& pool, const String& file_spec,
1.87 paf 123: void*& data, size_t& data_size, bool as_text,
1.44 paf 124: bool fail_on_read_problem,
125: size_t offset, size_t limit) {
1.64 parser 126: const char *fname=file_spec.cstr(String::UL_FILE_SPEC);
1.62 parser 127: //printf("file_read(%s)\n", fname);
1.33 paf 128: int f;
1.2 paf 129: struct stat finfo;
1.33 paf 130:
131: // first open, next stat:
1.45 paf 132: // directory update of NTFS hard links performed on open.
1.33 paf 133: // ex:
134: // a.html:^test[] and b.html hardlink to a.html
135: // user inserts ! before ^test in a.html
136: // directory entry of b.html in NTFS not updated at once,
1.35 paf 137: // they delay update till open, so we would receive "!^test[" string
138: // if would do stat, next open.
1.98 paf 139: if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) {
1.99 paf 140: lock_shared_blocking(f);
1.98 paf 141: if(stat(fname, &finfo)!=0) {
1.106 paf 142: Exception e("file.missing",
1.98 paf 143: &file_spec,
144: "stat failed: %s (%d), actual filename '%s'",
145: strerror(errno), errno, fname);
1.99 paf 146: unlock(f);
1.98 paf 147: close(f);
148: if(fail_on_read_problem)
149: throw e;
150: return false;
151: }
1.105 paf 152: #ifdef NO_FOREIGN_GROUP_FILES
153: if(finfo.st_gid/*foreign?*/!=getegid()) {
1.107 paf 154: Exception e("parser.runtime",
1.105 paf 155: &file_spec,
156: "parser reading files of foreign group disabled [recompile parser without --disable-foreign-group-files configure option], actual filename '%s'",
157: fname);
158: unlock(f);
159: close(f);
160: if(fail_on_read_problem)
161: throw e;
162: return false;
163: }
164: #endif
1.98 paf 165: size_t max_size=limit?min(offset+limit, (size_t)finfo.st_size)-offset:finfo.st_size;
1.47 paf 166: if(!max_size) { // eof
1.83 paf 167: if(as_text) {
168: data=pool.malloc(1);
169: *(char*)data=0;
170: } else
171: data=0;
1.98 paf 172: data_size=0;
1.59 parser 173: } else {
1.78 paf 174: data=pool.malloc(max_size+(as_text?1:0), 3);
1.59 parser 175: if(offset)
176: lseek(f, offset, SEEK_SET);
1.98 paf 177: data_size=read(f, data, max_size);
1.47 paf 178: }
1.99 paf 179: unlock(f);
1.2 paf 180: close(f);
1.59 parser 181: if(!max_size) // eof
182: return true;
1.32 paf 183:
1.98 paf 184: if(int(data_size)<0 || data_size>max_size)
1.106 paf 185: throw Exception(0,
1.33 paf 186: &file_spec,
1.44 paf 187: "read failed: actually read %d bytes count not in [0..%lu] valid range",
1.98 paf 188: data_size, (unsigned long)max_size); //never
1.87 paf 189:
190: if(as_text) {
191: fix_line_breaks((char *)data, data_size);
192: // note: after fixing
193: ((char*&)data)[data_size]=0;
194: }
1.72 parser 195: return true;
1.2 paf 196: }
1.4 paf 197: if(fail_on_read_problem)
1.106 paf 198: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.33 paf 199: &file_spec,
1.54 parser 200: "read failed: %s (%d), actual filename '%s'",
201: strerror(errno), errno, fname);
1.34 paf 202: return false;
1.8 paf 203: }
204:
1.63 parser 205: static void create_dir_for_file(const String& file_spec) {
206: size_t pos_after=1;
207: int pos_before;
208: while((pos_before=file_spec.pos("/", 1, pos_after))>=0) {
1.64 parser 209: mkdir(file_spec.mid(0, pos_before).cstr(String::UL_FILE_SPEC), 0775);
1.63 parser 210: pos_after=pos_before+1;
211: }
212: }
213:
1.98 paf 214: bool file_write_action_under_lock(
1.28 paf 215: const String& file_spec,
1.96 paf 216: const char *action_name, void (*action)(int, void *), void *context,
1.80 paf 217: bool as_text,
1.98 paf 218: bool do_append,
219: bool do_block) {
1.64 parser 220: const char *fname=file_spec.cstr(String::UL_FILE_SPEC);
1.28 paf 221: int f;
1.80 paf 222: if(access(fname, W_OK)!=0) // no
1.63 parser 223: create_dir_for_file(file_spec);
1.50 paf 224:
1.80 paf 225: if((f=open(fname,
226: O_CREAT|O_RDWR
227: |(as_text?_O_TEXT:_O_BINARY)
1.104 paf 228: |(do_append?O_APPEND:O_TRUNC), 0664))>=0) {
1.99 paf 229: if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) {
1.98 paf 230: close(f);
231: return false;
232: }
1.96 paf 233:
234: try {
235: action(f, context);
236: } catch(...) {
1.98 paf 237: #if O_TRUNC==0
1.104 paf 238: if(!do_append)
239: ftruncate(f, tell(f));
1.98 paf 240: #endif
1.99 paf 241: unlock(f);
1.96 paf 242: close(f);
243: /*re*/throw;
244: }
1.80 paf 245:
1.98 paf 246: #if O_TRUNC==0
1.104 paf 247: if(!do_append)
248: ftruncate(f, tell(f));
1.98 paf 249: #endif
1.99 paf 250: unlock(f);
1.80 paf 251: close(f);
1.98 paf 252: return true;
1.80 paf 253: } else
1.106 paf 254: throw Exception(errno==EACCES?"file.access":0,
1.80 paf 255: &file_spec,
1.96 paf 256: "%s failed: %s (%d), actual filename '%s'",
257: action_name, strerror(errno), errno, fname);
258: // here should be nothing, see rethrow above
259: }
260:
261: #ifndef DOXYGEN
262: struct File_write_action_info {
263: const void *data; size_t size;
264: };
265: #endif
266: static void file_write_action(int f, void *context) {
267: File_write_action_info& info=*static_cast<File_write_action_info *>(context);
268: if(info.size)
269: write(f, info.data, info.size);
270: }
271: void file_write(
272: const String& file_spec,
273: const void *data, size_t size,
274: bool as_text,
275: bool do_append) {
276: File_write_action_info info={data, size};
1.98 paf 277: file_write_action_under_lock(
1.96 paf 278: file_spec,
279: "write", file_write_action, &info,
280: as_text,
281: do_append);
1.30 paf 282: }
283:
1.63 parser 284: // throws nothing! [this is required in file_move & file_delete]
1.50 paf 285: static void rmdir(const String& file_spec, size_t pos_after) {
286: int pos_before;
287: if((pos_before=file_spec.pos("/", 1, pos_after))>=0)
288: rmdir(file_spec, pos_before+1);
289:
1.64 parser 290: rmdir(file_spec.mid(0, pos_after-1/* / */).cstr(String::UL_FILE_SPEC));
1.50 paf 291: }
1.95 paf 292: bool file_delete(const String& file_spec, bool fail_on_read_problem) {
1.64 parser 293: const char *fname=file_spec.cstr(String::UL_FILE_SPEC);
1.54 parser 294: if(unlink(fname)!=0)
1.93 paf 295: if(fail_on_read_problem)
1.106 paf 296: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.93 paf 297: &file_spec,
298: "unlink failed: %s (%d), actual filename '%s'",
299: strerror(errno), errno, fname);
300: else
301: return false;
1.50 paf 302:
303: rmdir(file_spec, 1);
1.93 paf 304: return true;
1.60 parser 305: }
1.95 paf 306: void file_move(const String& old_spec, const String& new_spec) {
1.64 parser 307: const char *old_spec_cstr=old_spec.cstr(String::UL_FILE_SPEC);
308: const char *new_spec_cstr=new_spec.cstr(String::UL_FILE_SPEC);
1.63 parser 309:
310: create_dir_for_file(new_spec);
311:
1.60 parser 312: if(rename(old_spec_cstr, new_spec_cstr)!=0)
1.106 paf 313: throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
1.60 parser 314: &old_spec,
315: "rename failed: %s (%d), actual filename '%s' to '%s'",
316: strerror(errno), errno, old_spec_cstr, new_spec_cstr);
1.63 parser 317:
318: rmdir(old_spec, 1);
1.31 paf 319: }
320:
1.51 paf 321:
322: static bool entry_readable(const String& file_spec, bool need_dir) {
1.64 parser 323: const char *fname=file_spec.cstr(String::UL_FILE_SPEC);
1.51 paf 324: struct stat finfo;
325: if(access(fname, R_OK)==0 && stat(fname, &finfo)==0) {
1.73 parser 326: bool is_dir=finfo.st_mode&S_IFDIR != 0;
1.51 paf 327: return is_dir==need_dir;
328: }
329: return false;
330: }
1.31 paf 331: bool file_readable(const String& file_spec) {
1.51 paf 332: return entry_readable(file_spec, false);
333: }
334: bool dir_readable(const String& file_spec) {
335: return entry_readable(file_spec, true);
1.65 parser 336: }
337: String *file_readable(const String& path, const String& name) {
338: String *result=new(path.pool()) String(path);
339: *result << "/";
340: *result << name;
341: return file_readable(*result)?result:0;
1.43 paf 342: }
343: bool file_executable(const String& file_spec) {
1.64 parser 344: return access(file_spec.cstr(String::UL_FILE_SPEC), X_OK)==0;
1.44 paf 345: }
346:
1.64 parser 347: bool file_stat(const String& file_spec,
1.58 parser 348: size_t& rsize,
349: time_t& ratime,
350: time_t& rmtime,
1.64 parser 351: time_t& rctime,
352: bool fail_on_read_problem) {
1.44 paf 353: Pool& pool=file_spec.pool();
1.64 parser 354: const char *fname=file_spec.cstr(String::UL_FILE_SPEC);
1.44 paf 355: struct stat finfo;
356: if(stat(fname, &finfo)!=0)
1.64 parser 357: if(fail_on_read_problem)
1.106 paf 358: throw Exception("file.missing",
1.67 parser 359: &file_spec,
360: "getting file size failed: %s (%d), real filename '%s'",
361: strerror(errno), errno, fname);
1.64 parser 362: else
363: return false;
1.58 parser 364: rsize=finfo.st_size;
365: ratime=finfo.st_atime;
366: rmtime=finfo.st_mtime;
367: rctime=finfo.st_ctime;
1.64 parser 368: return true;
1.18 paf 369: }
370:
1.8 paf 371: char *getrow(char **row_ref, char delim) {
372: char *result=*row_ref;
373: if(result) {
374: *row_ref=strchr(result, delim);
375: if(*row_ref)
376: *((*row_ref)++)=0;
377: else if(!*result)
378: return 0;
379: }
380: return result;
381: }
382:
1.23 paf 383: char *lsplit(char *string, char delim) {
384: if(string) {
385: char *v=strchr(string, delim);
1.8 paf 386: if(v) {
387: *v=0;
388: return v+1;
389: }
390: }
391: return 0;
392: }
393:
394: char *lsplit(char **string_ref, char delim) {
395: char *result=*string_ref;
396: char *next=lsplit(*string_ref, delim);
397: *string_ref=next;
398: return result;
1.9 paf 399: }
400:
401: char *rsplit(char *string, char delim) {
1.18 paf 402: if(string) {
1.9 paf 403: char *v=strrchr(string, delim);
1.18 paf 404: if(v) {
1.9 paf 405: *v=0;
406: return v+1;
407: }
408: }
409: return NULL;
1.10 paf 410: }
411:
1.37 paf 412: /// @todo less stupid type detection
1.10 paf 413: char *format(Pool& pool, double value, char *fmt) {
1.108 ! paf 414: char local_buf[MAX_NUMBER];
! 415: size_t size;
! 416:
1.10 paf 417: if(fmt)
418: if(strpbrk(fmt, "diouxX"))
419: if(strpbrk(fmt, "ouxX"))
1.108 ! paf 420: size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value);
1.10 paf 421: else
1.108 ! paf 422: size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value);
1.10 paf 423: else
1.108 ! paf 424: size=snprintf(local_buf, sizeof(local_buf), fmt, value);
1.10 paf 425: else
1.108 ! paf 426: size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value);
1.10 paf 427:
1.108 ! paf 428: char *pool_buf=(char *)pool.malloc(size+1, 4);
! 429: memcpy(pool_buf, local_buf, size+1);
! 430: return pool_buf;
1.12 paf 431: }
432:
1.36 paf 433: size_t stdout_write(const void *buf, size_t size) {
1.12 paf 434: #ifdef WIN32
435: do{
436: int chunk_written=fwrite(buf, 1, min(8*0x400, size), stdout);
437: if(chunk_written<=0)
438: break;
439: size-=chunk_written;
1.36 paf 440: buf=((const char*)buf)+chunk_written;
1.12 paf 441: } while(size>0);
442:
443: return size;
444: #else
1.13 paf 445: return fwrite(buf, 1, size, stdout);
1.12 paf 446: #endif
1.2 paf 447: }
1.14 paf 448:
1.77 parser 449: char *unescape_chars(Pool& pool, const char *cp, int len) {
1.78 paf 450: char *s=(char *)pool.malloc(len + 1, 5);
1.14 paf 451: enum EscapeState {
1.33 paf 452: EscapeRest,
453: EscapeFirst,
1.14 paf 454: EscapeSecond
455: } escapeState=EscapeRest;
456: int escapedValue=0;
457: int srcPos=0;
458: int dstPos=0;
459: while(srcPos < len) {
460: int ch=cp[srcPos];
461: switch(escapeState) {
462: case EscapeRest:
463: if(ch=='%') {
464: escapeState=EscapeFirst;
465: } else if(ch=='+') {
466: s[dstPos++]=' ';
467: } else {
468: s[dstPos++]=ch;
469: }
470: break;
471: case EscapeFirst:
472: escapedValue=hex_value[ch] << 4;
473: escapeState=EscapeSecond;
474: break;
475: case EscapeSecond:
476: escapedValue +=hex_value[ch];
477: s[dstPos++]=escapedValue;
478: escapeState=EscapeRest;
479: break;
480: }
481: srcPos++;
482: }
483: s[dstPos]=0;
484: return s;
485: }
486:
1.52 paf 487: /// used by attributed_meaning_to_string / append_attribute_subattribute
1.40 paf 488: struct Attributed_meaning_info {
1.52 paf 489: String *header; // header line being constructed
490: String::Untaint_lang lang; // language in which to append to that line
1.40 paf 491: };
1.17 paf 492: static void append_attribute_subattribute(const Hash::Key& akey, Hash::Val *avalue,
1.14 paf 493: void *info) {
494: if(akey==VALUE_NAME)
495: return;
496:
1.40 paf 497: Attributed_meaning_info& ami=*static_cast<Attributed_meaning_info *>(info);
498:
1.14 paf 499: // ...; charset=windows1251
1.48 paf 500: *ami.header << "; ";
1.70 parser 501: ami.header->append(akey, ami.lang);
1.48 paf 502: *ami.header << "=";
1.70 parser 503: ami.header->append(static_cast<Value *>(avalue)->as_string(), ami.lang);
1.14 paf 504: }
1.49 paf 505: const String& attributed_meaning_to_string(Value& meaning,
506: String::Untaint_lang lang) {
1.20 paf 507: String &result=*new(meaning.pool()) String(meaning.pool());
1.75 parser 508: if(Hash *hash=meaning.get_hash(0)) {
1.14 paf 509: // $value(value) $subattribute(subattribute value)
510: if(Value *value=static_cast<Value *>(hash->get(*value_name)))
1.40 paf 511: result.append(value->as_string(), lang, true);
1.14 paf 512:
1.40 paf 513: Attributed_meaning_info attributed_meaning_info={
1.52 paf 514: &result,
515: lang
1.40 paf 516: };
517: hash->for_each(append_attribute_subattribute, &attributed_meaning_info);
1.14 paf 518: } else // result value
1.40 paf 519: result.append(meaning.as_string(), lang, true);
1.14 paf 520:
521: return result;
1.24 paf 522: }
523:
524: #ifdef WIN32
525: void back_slashes_to_slashes(char *s) {
526: if(s)
527: for(; *s; s++)
528: if(*s=='\\')
529: *s='/';
530: }
1.42 paf 531: /*
532: void slashes_to_back_slashes(char *s) {
533: if(s)
534: for(; *s; s++)
535: if(*s=='/')
536: *s='\\';
537: }
538: */
1.24 paf 539: #endif
1.41 paf 540:
541: bool StrEqNc(const char *s1, const char *s2, bool strict) {
542: while(true) {
543: if(!(*s1)) {
544: if(!(*s2))
545: return true;
546: else
547: return !strict;
548: } else if(!(*s2))
549: return !strict;
550: if(isalpha(*s1)) {
551: if(tolower(*s1) !=tolower(*s2))
552: return false;
553: } else if((*s1) !=(*s2))
554: return false;
555: s1++;
556: s2++;
557: }
1.57 parser 558: }
559:
1.84 paf 560: static bool isLeap(int year) {
1.57 parser 561: return !(
562: (year % 4) || ((year % 400) && !(year % 100))
563: );
564: }
565:
566: int getMonthDays(int year, int month) {
567: int monthDays[]={
568: 31,
569: isLeap(year) ? 29 : 28,
570: 31,
571: 30,
572: 31,
573: 30,
574: 31,
575: 31,
576: 30,
577: 31,
578: 30,
579: 31
580: };
581: return monthDays[month];
1.41 paf 582: }
1.69 parser 583:
584: void remove_crlf(char *start, char *end) {
585: for(char *p=start; p<end; p++)
586: switch(*p) {
587: case '\n': *p='|'; break;
588: case '\r': *p=' '; break;
589: }
1.91 paf 590: }
591:
592:
593: /// must be last in this file
594: #undef vsnprintf
595: int __vsnprintf(char *b, size_t s, const char *f, va_list l) {
596: if(!s)
597: return 0;
598:
599: int r;
600: // note: on win32& maybe somewhere else
601: // vsnprintf do not writes terminating 0 in 'buffer full' case, reducing
602: --s;
603: #if _MSC_VER
604: /*
605: win32:
606: mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm
607:
608: if the number of bytes to write exceeds buffer, then count bytes are written and –1 is returned
609: */
610: r=_vsnprintf(b, s, f, l);
611: if(r<0)
612: r=s;
613: #else
614: r=vsnprintf(b, s, f, l);
615: /*
616: solaris:
617: man vsnprintf
618:
619: The snprintf() function returns the number of characters
620: formatted, that is, the number of characters that would have
621: been written to the buffer if it were large enough. If the
622: value of n is 0 on a call to snprintf(), an unspecified
623: value less than 1 is returned.
624: */
625:
626: if(r<0)
627: r=0;
628: else if(r>s)
629: r=s;
630: #endif
631: b[r]=0;
632: return r;
633: }
634:
635: int __snprintf(char *b, size_t s, const char *f, ...) {
636: va_list l;
637: va_start(l, f);
638: int r=__vsnprintf(b, s, f, l);
639: va_end(l);
640: return r;
1.98 paf 641: }
642:
643: int pa_sleep(unsigned long secs, unsigned long usecs) {
644: for (; usecs >= 1000000; ++secs, usecs -= 1000000);
645:
646: #ifdef WIN32
647: Sleep(secs * 1000 + usecs / 1000);
648: return 0;
649: #else
650: struct timeval t;
651: t.tv_sec = secs;
652: t.tv_usec = usecs;
653: return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0);
654: #endif
1.74 parser 655: }
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