/** @file
Parser: commonly functions.
Copyright(c) 2001-2003 ArtLebedev Group (http://www.artlebedev.com)
Author: Alexandr Petrosian <paf@design.ru> (http://paf.design.ru)
*/
static const char* IDENT_COMMON_C="$Date: 2003/02/14 17:28:19 $";
#include "pa_common.h"
#include "pa_exception.h"
#include "pa_hash.h"
#include "pa_vstring.h"
#include "pa_vint.h"
#include "pa_globals.h"
#ifdef CYGWIN
#define _GNU_H_WINDOWS32_SOCKETS
// for PASCAL
#include <windows.h>
// SOCKET
typedef u_int SOCKET;
int PASCAL closesocket(SOCKET);
#else
# if defined(WIN32)
# include <windows.h>
# else
# define closesocket close
# endif
#endif
// some maybe-undefined constants
#ifndef _O_TEXT
# define _O_TEXT 0
#endif
#ifndef _O_BINARY
# define _O_BINARY 0
#endif
#ifdef HAVE_FTRUNCATE
# define PA_O_TRUNC 0
#else
# ifdef _O_TRUNC
# define PA_O_TRUNC _O_TRUNC
# else
# error you must have either ftruncate function or _O_TRUNC bit declared
# endif
#endif
// locking constants
#ifdef HAVE_FLOCK
static int lock_shared_blocking(int fd) { return flock(fd, LOCK_SH); }
static int lock_exclusive_blocking(int fd) { return flock(fd, LOCK_EX); }
static int lock_exclusive_nonblocking(int fd) { return flock(fd, LOCK_EX || LOCK_NB); }
static int unlock(int fd) { return flock(fd, LOCK_UN); }
#else
#ifdef HAVE__LOCKING
#define FLOCK(operation) lseek(fd, 0, SEEK_SET); return _locking(fd, operation, 1)
static int lock_shared_blocking(int fd) { FLOCK(_LK_LOCK); }
static int lock_exclusive_blocking(int fd) { FLOCK(_LK_LOCK); }
static int lock_exclusive_nonblocking(int fd) { FLOCK(_LK_NBLCK); }
static int unlock(int fd) { FLOCK(_LK_UNLCK); }
#else
#ifdef HAVE_FCNTL
#define FLOCK(cmd, arg) struct flock ls={arg, SEEK_SET}; return fcntl(fd, cmd, &ls)
static int lock_shared_blocking(int fd) { FLOCK(F_SETLKW, F_RDLCK); }
static int lock_exclusive_blocking(int fd) { FLOCK(F_SETLKW, F_WRLCK); }
static int lock_exclusive_nonblocking(int fd) { FLOCK(F_SETLK, F_RDLCK); }
static int unlock(int fd) { FLOCK(F_SETLK, F_UNLCK); }
#else
#ifdef HAVE_LOCKF
#define FLOCK(fd, operation) lseek(fd, 0, SEEK_SET); return lockf(fd, operation, 1)
static int lock_shared_blocking(int fd) { FLOCK(F_LOCK); } // on intel solaris man doesn't have doc on shared blocking
static int lock_exclusive_blocking(int fd) { FLOCK(F_LOCK); }
static int lock_exclusive_nonblocking(int fd) { FLOCK(F_TLOCK); }
static int unlock(int fd) { FLOCK(F_TLOCK); }
#else
#error unable to find file locking func
#endif
#endif
#endif
#endif
// defines for globals
#define FILE_STATUS_NAME "status"
// globals
StringPtr file_status_name(new String(FILE_STATUS_NAME));
// defines for statics
#define HTTP_METHOD_NAME "method"
#define HTTP_TIMEOUT_NAME "timeout"
#define HTTP_HEADERS_NAME "headers"
#define HTTP_ANY_STATUS_NAME "any-status"
// statics
static StringPtr http_method_name(new String(HTTP_METHOD_NAME));
static StringPtr http_timeout_name(new String(HTTP_TIMEOUT_NAME));
static StringPtr http_headers_name(new String(HTTP_HEADERS_NAME));
static StringPtr http_any_status_name(new String(HTTP_ANY_STATUS_NAME));
// defines
#define DEFAULT_USER_AGENT "parser3"
// functions
void fix_line_breaks(char* buf, size_t& size) {
if(size==0)
return;
//_asm int 3;
const char* const eob=buf+size;
char* dest=buf;
// fix DOS: \r\n -> \n
// fix Macintosh: \r -> \n
char* bol=buf;
while(char* eol=(char*)memchr(bol, '\r', eob -bol)) {
size_t len=eol-bol;
if(dest!=bol)
memcpy(dest, bol, len);
dest+=len;
*dest++='\n';
if(&eol[1]<eob && eol[1]=='\n') { // \r, \n = DOS
bol=eol+2;
size--;
} else // \r, not \n = Macintosh
bol=eol+1;
}
// last piece without \r, including terminating 0
if(dest!=bol)
memcpy(dest, bol, eob-bol);
}
char* file_read_text(Pool& pool, Charset& charset,
StringPtr file_spec,
bool fail_on_read_problem,
HashStringValue* params/*, HashStringValuePtr* out_fields*/) {
File_read_result file=
file_read(pool, charset, file_spec, true, params, fail_on_read_problem);
return file.success?file.data:0;
}
//http request stuff
/* ************************ http stuff *********************** */
static bool set_addr(struct sockaddr_in *addr, const char* host, const short port){
memset(addr, 0, sizeof(*addr));
addr->sin_family=AF_INET;
addr->sin_port=htons(port);
if(host) {
if(struct hostent *hostIP=gethostbyname(host))
memcpy(&addr->sin_addr, hostIP->h_addr, hostIP->h_length);
else
return false;
} else
addr->sin_addr.s_addr=INADDR_ANY;
return true;
}
static int http_read_response(Pool& pool, String& response, int sock, bool fail_on_status_ne_200){
int result=0;
ssize_t EOLat=0;
while(true) {
char *buf=(char *)pool.malloc(MAX_STRING);
ssize_t size=recv(sock, buf, MAX_STRING, 0);
if(size<=0)
break;
response.APPEND_TAINTED(buf, size, "remote HTTP server response", 0);
if(!result && (EOLat=response.pos("\r\n", 2))>=0) { // checking status in first response
StringPtr status_line=response.mid(0, (size_t)EOLat);
ArrayString astatus;
status_line->split(astatus, 0, " ", 1);
StringPtr status_code=astatus.get(1);
result=status_code->as_int();
if(fail_on_status_ne_200 && result!=200)
throw Exception("http.status",
status_code,
"invalid HTTP response status");
}
}
if(result)
return result;
else
throw Exception("http.response",
Exception::undefined_source,
"bad response from host - no status found (size=%lu)", response.size());
}
/* ********************** request *************************** */
#if defined(SIGALRM) && defined(HAVE_SIGSETJMP) && defined(HAVE_SIGLONGJMP)
# define WE_CAN_USE_ALARM
#endif
#ifdef WE_CAN_USE_ALARM
static sigjmp_buf timeout_env;
static void timeout_handler(int sig){
siglongjmp(timeout_env, 1);
}
#endif
static int http_request(Pool& pool,
String& response,
StringPtr origin_string,
const char* host, int port,
const char* request,
int timeout,
bool fail_on_status_ne_200) {
if(!host)
throw Exception("http.host",
origin_string,
"zero hostname"); //never
#ifdef WE_CAN_USE_ALARM
signal(SIGALRM, timeout_handler);
#endif
int sock=-1;
try {
int result;
#ifdef WE_CAN_USE_ALARM
if(sigsetjmp(timeout_env, 1))
throw Exception("http.timeout",
origin_string,
"timeout occured while retrieving document");
else {
alarm(timeout);
#endif
struct sockaddr_in dest;
if(!set_addr(&dest, host, port))
throw Exception("http.host",
origin_string,
"can not resolve hostname \"%s\"", host);
if((sock=socket(AF_INET, SOCK_STREAM, IPPROTO_TCP/*0*/))<0)
throw Exception("http.connect",
origin_string,
"can not make socket: %s (%d)", strerror(errno), errno);
if(connect(sock, (struct sockaddr *)&dest, sizeof(dest)))
throw Exception("http.connect",
origin_string,
"can not connect to host \"%s\": %s (%d)", host, strerror(errno), errno);
size_t request_size=strlen(request);
if(send(sock, request, request_size, 0)!=(ssize_t)request_size)
throw Exception("http.connect",
origin_string,
"error sending request: %s (%d)", strerror(errno), errno);
result=http_read_response(pool, response, sock, fail_on_status_ne_200);
closesocket(sock);
#ifdef WE_CAN_USE_ALARM
alarm(0);
}
#endif
return result;
} catch(...) {
if(sock>=0)
closesocket(sock);
#ifdef WE_CAN_USE_ALARM
alarm(0);
#endif
rethrow;
}
}
#ifndef DOXYGEN
struct Http_pass_header_info {
Pool* pool;
Charset* charset;
String* request;
bool user_agent_specified;
};
#endif
static void http_pass_header(HashStringValue::key_type key, HashStringValue::value_type value,
Http_pass_header_info *info) {
*(info->request)<<*key<<": "
<< *attributed_meaning_to_string(*info->pool, value, String::UL_HTTP_HEADER, false)
<<"\n";
if(*key->change_case(*info->pool, *info->charset, String::CC_UPPER)=="USER-AGENT")
info->user_agent_specified=true;
}
#ifndef DOXYGEN
struct File_read_http_info {
char **data; size_t *data_size;
HashStringValuePtr headers;
};
#endif
static File_read_http_info file_read_http(Pool& pool, Charset& charset, StringPtr file_spec,
HashStringValue *options=0) {
File_read_http_info result;
char host[MAX_STRING];
const char* uri;
int port;
CharPtr method(0);
int timeout=2;
bool fail_on_status_ne_200=true;
ValuePtr vheaders(0);
StringPtr connect_string(new String());
// not in ^sql{... UL_SQL ...} spirit, but closer to ^file::load one
connect_string->append(*file_spec, String::UL_URI); // tainted pieces -> URI pieces
CharPtr connect_string_cstr=connect_string->cstr(String::UL_UNSPECIFIED);
const char* current=connect_string_cstr;
if(strncmp(current, "http://", 7)!=0)
throw Exception(0,
connect_string,
"does not start with http://"); //never
current+=7;
strncpy(host, current, sizeof(host)-1); host[sizeof(host)-1]=0;
char* host_uri=lsplit(host, '/');
uri=host_uri?current+(host_uri-1-host):"/";
char* port_cstr=lsplit(host, ':');
char* error_pos=0;
port=port_cstr?strtol(port_cstr, &error_pos, 0):80;
if(options) {
int valid_options=0;
if(ValuePtr vmethod=options->get(http_method_name)) {
valid_options++;
method=vmethod->as_string(&pool)->cstr();
}
if(ValuePtr vtimeout=options->get(http_timeout_name)) {
valid_options++;
timeout=vtimeout->as_int();
}
if(vheaders=options->get(http_headers_name)) {
valid_options++;
}
if(ValuePtr vany_status=options->get(http_any_status_name)) {
valid_options++;
fail_on_status_ne_200=!vany_status->as_bool();
}
if(valid_options!=options->count())
throw Exception("parser.runtime",
Exception::undefined_source,
"invalid option passed");
}
//making request
String request;
if(method)
request<<method;
else
request<<"GET";
request<< " "<< uri <<" HTTP/1.0\nHost: "<< host<<"\n";
bool user_agent_specified=false;
if(vheaders && !vheaders->is_string()) { // allow empty
if(HashStringValue *headers=vheaders->get_hash(connect_string)) {
Http_pass_header_info info={&pool, &charset, &request};
headers->for_each(http_pass_header, &info);
user_agent_specified=info.user_agent_specified;
} else
throw Exception("parser.runtime",
connect_string,
"headers param must be hash");
};
if(!user_agent_specified) // defaulting
request << "user-agent: " DEFAULT_USER_AGENT "\n";
request<<"\n";
//sending request
String response;
CharPtr request_cstr=request.cstr(String::UL_UNSPECIFIED);
int status_code=http_request(pool, response,
connect_string, host, port, request_cstr,
timeout, fail_on_status_ne_200);
//processing results
int pos=response.pos("\r\n\r\n", 4);
if(pos<1){
throw Exception("http.response",
connect_string,
"bad response from host - no headers found");
}
StringPtr header_block=response.mid(0, pos);
StringPtr body=response.mid(pos+4, response.size());
ArrayString aheaders;
result.headers=HashStringValuePtr(new HashStringValue);
header_block->split(aheaders, 0, "\r\n", 2);
//processing headers
for(int i=1; i<aheaders.count(); i++) {
StringPtr line=aheaders.get(i);
pos=line->pos(": ", 2);
if(pos<1)
throw Exception("http.response",
connect_string,
"bad response from host - bad header \"%s\"", line->cstr().get());
result.headers->put(
line->mid(0, pos)->change_case(pool, charset, String::CC_UPPER),
ValuePtr(new VString(line->mid(pos+2, line->size()))));
}
// output response
*result.data=new(pool) char[*result.data_size=body->size()];
body->store_to(*result.data, String::UL_AS_IS);
result.headers->put(file_status_name, ValuePtr(new VInt(status_code)));
return result;
}
#ifndef DOXYGEN
struct File_read_action_info {
char **data; size_t *data_size;
};
#endif
static void file_read_action(Pool& pool,
struct stat& finfo,
int f,
StringPtr file_spec, const char* fname, bool as_text,
void *context) {
File_read_action_info& info=*static_cast<File_read_action_info *>(context);
if(size_t to_read_size=(size_t)finfo.st_size) {
*info.data=pool.malloc(to_read_size+(as_text?1:0));
*info.data_size=(size_t)read(f, *info.data, to_read_size);
if(ssize_t(*info.data_size)<0 || *info.data_size>to_read_size)
throw Exception(0,
file_spec,
"read failed: actually read %lu bytes count not in [0..%lu] valid range",
*info.data_size, to_read_size);
} else { // empty file
if(as_text) {
*info.data=pool.malloc(1);
*(char*)(*info.data)=0;
} else
*info.data=0;
*info.data_size=0;
return;
}
}
File_read_result file_read(Pool& pool, Charset& charset, StringPtr file_spec,
bool as_text, HashStringValue *params,
bool fail_on_read_problem) {
File_read_result result;
if(file_spec->starts_with("http://", 7)) {
// fail on read problem
result.headers=file_read_http(pool, charset, file_spec, params).headers;
result.success=true;
} else {
File_read_action_info info={&result.data, &result.size};
result.success=file_read_action_under_lock(pool, file_spec,
"read", file_read_action, &info,
as_text, fail_on_read_problem);
}
if(result.success && as_text) {
// UTF-8 signature: EF BB BF
if(result.size>=3) {
char *in=(char *)result.data;
if((in[0] == '\xEF') && (in[1] == '\xBB') &&
(in[2] == '\xBF')) {
result.data=in+3; result.size-=3;// skip prefix
}
}
fix_line_breaks((char *)(result.data), result.size);
// note: after fixing
((char*&)(result.data))[result.size]=0;
}
return result;
}
bool file_read_action_under_lock(Pool& pool, StringPtr file_spec,
const char* action_name, File_read_action action, void *context,
bool as_text,
bool fail_on_read_problem) {
CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
int f;
// first open, next stat:
// directory update of NTFS hard links performed on open.
// ex:
// a.html:^test[] and b.html hardlink to a.html
// user inserts ! before ^test in a.html
// directory entry of b.html in NTFS not updated at once,
// they delay update till open, so we would receive "!^test[" string
// if would do stat, next open.
// later: it seems, even this does not help sometimes
if((f=open(fname, O_RDONLY|(as_text?_O_TEXT:_O_BINARY)))>=0) {
try {
if(lock_shared_blocking(f)!=0)
throw Exception("file.lock",
file_spec,
"shared lock failed: %s (%d), actual filename '%s'",
strerror(errno), errno, fname.get());
struct stat finfo;
if(stat(fname, &finfo)!=0)
throw Exception("file.missing", // hardly possible: we just opened it OK
file_spec,
"stat failed: %s (%d), actual filename '%s'",
strerror(errno), errno, fname.get());
#ifdef PA_SAFE_MODE
if(finfo.st_uid/*foreign?*/!=geteuid()
&& finfo.st_gid/*foreign?*/!=getegid())
throw Exception("parser.runtime",
file_spec,
"parser is in safe mode: reading files of foreign group and user disabled [recompile parser with --disable-safe-mode configure option], actual filename '%s'",
fname.get());
#endif
action(pool, finfo, f, file_spec, fname, as_text, context);
} catch(...) {
unlock(f);close(f);
if(fail_on_read_problem)
rethrow;
return false;
}
unlock(f);close(f);
return true;
} else {
if(fail_on_read_problem)
throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
file_spec,
"%s failed: %s (%d), actual filename '%s'",
action_name, strerror(errno), errno, fname.get());
return false;
}
}
static void create_dir_for_file(StringPtr file_spec) {
size_t pos_after=1;
int pos_before;
while((pos_before=file_spec->pos("/", 1, pos_after))>=0) {
mkdir(file_spec->mid(0, pos_before)->cstr(String::UL_FILE_SPEC), 0775);
pos_after=pos_before+1;
}
}
bool file_write_action_under_lock(
StringPtr file_spec,
const char* action_name, File_write_action action, void *context,
bool as_text,
bool do_append,
bool do_block,
bool fail_on_lock_problem) {
CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
int f;
if(access(fname, W_OK)!=0) // no
create_dir_for_file(file_spec);
if((f=open(fname,
O_CREAT|O_RDWR
|(as_text?_O_TEXT:_O_BINARY)
|(do_append?O_APPEND:PA_O_TRUNC), 0664))>=0) {
if((do_block?lock_exclusive_blocking(f):lock_exclusive_nonblocking(f))!=0) {
Exception e("file.lock",
file_spec,
"shared lock failed: %s (%d), actual filename '%s'",
strerror(errno), errno, fname.get());
close(f);
if(fail_on_lock_problem)
throw e;
return false;
}
try {
action(f, context);
} catch(...) {
#ifdef HAVE_FTRUNCATE
if(!do_append)
ftruncate(f, lseek(f, 0, SEEK_CUR)); // one can not use O_TRUNC, read lower
#endif
unlock(f);close(f);
rethrow;
}
#ifdef HAVE_FTRUNCATE
if(!do_append)
ftruncate(f, lseek(f, 0, SEEK_CUR)); // O_TRUNC truncates even exclusevely write-locked file [thanks to Igor Milyakov <virtan@rotabanner.com> for discovering]
#endif
unlock(f);close(f);
return true;
} else
throw Exception(errno==EACCES?"file.access":0,
file_spec,
"%s failed: %s (%d), actual filename '%s'",
action_name, strerror(errno), errno, fname.get());
// here should be nothing, see rethrow above
}
#ifndef DOXYGEN
struct File_write_action_info {
const char *data; size_t size;
};
#endif
static void file_write_action(int f, void *context) {
File_write_action_info& info=*static_cast<File_write_action_info *>(context);
if(info.size) {
int written=write(f, info.data, info.size);
if(written<0)
throw Exception(0,
Exception::undefined_source,
"write failed: %s (%d)", strerror(errno), errno);
}
}
void file_write(
StringPtr file_spec,
const char *data, size_t size,
bool as_text,
bool do_append) {
File_write_action_info info={data, size};
file_write_action_under_lock(
file_spec,
"write", file_write_action, &info,
as_text,
do_append);
}
// throws nothing! [this is required in file_move & file_delete]
static void rmdir(StringPtr file_spec, size_t pos_after) {
int pos_before;
if((pos_before=file_spec->pos("/", 1, pos_after))>=0)
rmdir(file_spec, pos_before+1);
rmdir(file_spec->mid(0, pos_after-1/* / */)->cstr(String::UL_FILE_SPEC));
}
bool file_delete(StringPtr file_spec, bool fail_on_read_problem) {
CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
if(unlink(fname)!=0)
if(fail_on_read_problem)
throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
file_spec,
"unlink failed: %s (%d), actual filename '%s'",
strerror(errno), errno, fname.get());
else
return false;
rmdir(file_spec, 1);
return true;
}
void file_move(StringPtr old_spec, StringPtr new_spec) {
CharPtr old_spec_cstr=old_spec->cstr(String::UL_FILE_SPEC);
CharPtr new_spec_cstr=new_spec->cstr(String::UL_FILE_SPEC);
create_dir_for_file(new_spec);
if(rename(old_spec_cstr, new_spec_cstr)!=0)
throw Exception(errno==EACCES?"file.access":errno==ENOENT?"file.missing":0,
old_spec,
"rename failed: %s (%d), actual filename '%s' to '%s'",
strerror(errno), errno, old_spec_cstr.get(), new_spec_cstr.get());
rmdir(old_spec, 1);
}
bool entry_exists(const char* fname, struct stat *afinfo) {
struct stat lfinfo;
bool result=stat(fname, &lfinfo)==0;
if(afinfo)
*afinfo=lfinfo;
return result;
}
bool entry_exists(StringPtr file_spec) {
CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
return entry_exists(fname, 0);
}
static bool entry_readable(StringPtr file_spec, bool need_dir) {
CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
if(need_dir) {
size_t size=strlen(fname);
while(size) {
char c=fname[size-1];
if(c=='/' || c=='\\')
fname[--size]=0;
else
break;
}
}
struct stat finfo;
if(access(fname, R_OK)==0 && entry_exists(fname, &finfo)) {
bool is_dir=(finfo.st_mode&S_IFDIR) != 0;
return is_dir==need_dir;
}
return false;
}
bool file_readable(StringPtr file_spec) {
return entry_readable(file_spec, false);
}
bool dir_readable(StringPtr file_spec) {
return entry_readable(file_spec, true);
}
StringPtr file_readable(StringPtr path, const String& name) {
StringPtr result(new String(*path));
*result << "/";
*result << name;
return file_readable(result)?result:StringPtr(0);
}
bool file_executable(StringPtr file_spec) {
return access(file_spec->cstr(String::UL_FILE_SPEC), X_OK)==0;
}
bool file_stat(StringPtr file_spec,
size_t& rsize,
time_t& ratime,
time_t& rmtime,
time_t& rctime,
bool fail_on_read_problem) {
CharPtr fname=file_spec->cstr(String::UL_FILE_SPEC);
struct stat finfo;
if(stat(fname, &finfo)!=0)
if(fail_on_read_problem)
throw Exception("file.missing",
file_spec,
"getting file size failed: %s (%d), real filename '%s'",
strerror(errno), errno, fname.get());
else
return false;
rsize=finfo.st_size;
ratime=finfo.st_atime;
rmtime=finfo.st_mtime;
rctime=finfo.st_ctime;
return true;
}
char* getrow(char* *row_ref, char delim) {
char* result=*row_ref;
if(result) {
*row_ref=strchr(result, delim);
if(*row_ref)
*((*row_ref)++)=0;
else if(!*result)
return 0;
}
return result;
}
char* lsplit(char* string, char delim) {
if(string) {
char* v=strchr(string, delim);
if(v) {
*v=0;
return v+1;
}
}
return 0;
}
char* lsplit(char* *string_ref, char delim) {
char* result=*string_ref;
char* next=lsplit(*string_ref, delim);
*string_ref=next;
return result;
}
char* rsplit(char* string, char delim) {
if(string) {
char* v=strrchr(string, delim);
if(v) {
*v=0;
return v+1;
}
}
return NULL;
}
/// @todo less stupid type detection
const char* format(Pool& pool, double value, char* fmt) {
char local_buf[MAX_NUMBER];
size_t size;
if(fmt)
if(strpbrk(fmt, "diouxX"))
if(strpbrk(fmt, "ouxX"))
size=snprintf(local_buf, sizeof(local_buf), fmt, (uint)value);
else
size=snprintf(local_buf, sizeof(local_buf), fmt, (int)value);
else
size=snprintf(local_buf, sizeof(local_buf), fmt, value);
else
size=snprintf(local_buf, sizeof(local_buf), "%d", (int)value);
return pool.copy(local_buf, size+1);
}
size_t stdout_write(const void *buf, size_t size) {
#ifdef WIN32
do{
int chunk_written=fwrite(buf, 1, min(8*0x400, size), stdout);
if(chunk_written<=0)
break;
size-=chunk_written;
buf=((const char*)buf)+chunk_written;
} while(size>0);
return size;
#else
return fwrite(buf, 1, size, stdout);
#endif
}
char* unescape_chars(Pool& pool, const char* cp, int len) {
char* s=pool.malloc(len + 1);
enum EscapeState {
EscapeRest,
EscapeFirst,
EscapeSecond
} escapeState=EscapeRest;
int escapedValue=0;
int srcPos=0;
int dstPos=0;
while(srcPos < len) {
int ch=cp[srcPos];
switch(escapeState) {
case EscapeRest:
if(ch=='%') {
escapeState=EscapeFirst;
} else if(ch=='+') {
s[dstPos++]=' ';
} else {
s[dstPos++]=ch;
}
break;
case EscapeFirst:
escapedValue=hex_value[ch] << 4;
escapeState=EscapeSecond;
break;
case EscapeSecond:
escapedValue +=hex_value[ch];
s[dstPos++]=escapedValue;
escapeState=EscapeRest;
break;
}
srcPos++;
}
s[dstPos]=0;
return s;
}
#ifdef WIN32
void back_slashes_to_slashes(char* s) {
if(s)
for(; *s; s++)
if(*s=='\\')
*s='/';
}
/*
void slashes_to_back_slashes(char* s) {
if(s)
for(; *s; s++)
if(*s=='/')
*s='\\';
}
*/
#endif
bool StrEqNc(const char* s1, const char* s2, bool strict) {
while(true) {
if(!(*s1)) {
if(!(*s2))
return true;
else
return !strict;
} else if(!(*s2))
return !strict;
if(isalpha(*s1)) {
if(tolower(*s1) !=tolower(*s2))
return false;
} else if((*s1) !=(*s2))
return false;
s1++;
s2++;
}
}
static bool isLeap(int year) {
return !(
(year % 4) || ((year % 400) && !(year % 100))
);
}
int getMonthDays(int year, int month) {
int monthDays[]={
31,
isLeap(year) ? 29 : 28,
31,
30,
31,
30,
31,
31,
30,
31,
30,
31
};
return monthDays[month];
}
void remove_crlf(char* start, char* end) {
for(char* p=start; p<end; p++)
switch(*p) {
case '\n': *p='|'; break;
case '\r': *p=' '; break;
}
}
/// must be last in this file
#undef vsnprintf
int __vsnprintf(char* b, size_t s, const char* f, va_list l) {
if(!s)
return 0;
int r;
// note: on win32& maybe somewhere else
// vsnprintf do not writes terminating 0 in 'buffer full' case, reducing
--s;
#if _MSC_VER
/*
win32:
mk:@MSITStore:C:\Program%20Files\Microsoft%20Visual%20Studio\MSDN\2001APR\1033\vccore.chm::/html/_crt__vsnprintf.2c_._vsnwprintf.htm
if the number of bytes to write exceeds buffer, then count bytes are written and Ö1 is returned
*/
r=_vsnprintf(b, s, f, l);
if(r<0)
r=s;
#else
r=vsnprintf(b, s, f, l);
/*
solaris:
man vsnprintf
The snprintf() function returns the number of characters
formatted, that is, the number of characters that would have
been written to the buffer if it were large enough. If the
value of n is 0 on a call to snprintf(), an unspecified
value less than 1 is returned.
*/
if(r<0)
r=0;
else if(r>s)
r=s;
#endif
b[r]=0;
return r;
}
int __snprintf(char* b, size_t s, const char* f, ...) {
va_list l;
va_start(l, f);
int r=__vsnprintf(b, s, f, l);
va_end(l);
return r;
}
int pa_sleep(unsigned long secs, unsigned long usecs) {
for (; usecs >= 1000000; ++secs, usecs -= 1000000);
#ifdef WIN32
Sleep(secs * 1000 + usecs / 1000);
return 0;
#else
struct timeval t;
t.tv_sec = secs;
t.tv_usec = usecs;
return (select(0, NULL, NULL, NULL, &t) == -1 ? errno : 0);
#endif
}
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