curl.h

#ifndef __CURL_CURL_H
#define __CURL_CURL_H
/***************************************************************************
 *                                  _   _ ____  _
 *  Project                     ___| | | |  _ \| |
 *                             / __| | | | |_) | |
 *                            | (__| |_| |  _ <| |___
 *                             \___|\___/|_| \_\_____|
 *
 * Copyright (C) 1998 - 2009, Daniel Stenberg, <daniel@haxx.se>, et al.
 *
 * This software is licensed as described in the file COPYING, which
 * you should have received as part of this distribution. The terms
 * are also available at http://curl.haxx.se/docs/copyright.html.
 *
 * You may opt to use, copy, modify, merge, publish, distribute and/or sell
 * copies of the Software, and permit persons to whom the Software is
 * furnished to do so, under the terms of the COPYING file.
 *
 * This software is distributed on an "AS IS" basis, WITHOUT WARRANTY OF ANY
 * KIND, either express or implied.
 *
 * $Id$
 ***************************************************************************/

/*
 * If you have libcurl problems, all docs and details are found here:
 *   http://curl.haxx.se/libcurl/
 *
 * curl-library mailing list subscription and unsubscription web interface:
 *   http://cool.haxx.se/mailman/listinfo/curl-library/
 */

#include "curlver.h"         /* libcurl version defines   */
#include "curl/curlbuild.h"  /* libcurl build definitions */
#include "curlrules.h"       /* libcurl rules enforcement */

/*
 * Define WIN32 when build target is Win32 API
 */

#if (defined(_WIN32) || defined(__WIN32__)) && \
     !defined(WIN32) && !defined(__SYMBIAN32__)
#define WIN32
#endif

#include <stdio.h>
#include <limits.h>

/* The include stuff here below is mainly for time_t! */
#ifdef vms
# include <types.h>
# include <time.h>
#else
# include <sys/types.h>
# include <time.h>
#endif /* defined (vms) */

#if defined(WIN32) && !defined(_WIN32_WCE) && !defined(__GNUC__) && \
  !defined(__CYGWIN__) || defined(__MINGW32__)
#if !(defined(_WINSOCKAPI_) || defined(_WINSOCK_H))
/* The check above prevents the winsock2 inclusion if winsock.h already was
   included, since they can't co-exist without problems */
#include <winsock2.h>
#include <ws2tcpip.h>
#endif
#else

/* HP-UX systems version 9, 10 and 11 lack sys/select.h and so does oldish
   libc5-based Linux systems. Only include it on system that are known to
   require it! */
#if defined(_AIX) || defined(__NOVELL_LIBC__) || defined(__NetBSD__) || \
    defined(__minix) || defined(__SYMBIAN32__) || defined(__INTEGRITY)
#include <sys/select.h>
#endif

#ifndef _WIN32_WCE
#include <sys/socket.h>
#endif
#if !defined(WIN32) && !defined(__WATCOMC__)
#include <sys/time.h>
#endif
#include <sys/types.h>
#endif

#ifdef __BEOS__
#include <support/SupportDefs.h>
#endif

#ifdef  __cplusplus
extern "C" {
#endif

typedef void CURL;

/*
 * Decorate exportable functions for Win32 and Symbian OS DLL linking.
 * This avoids using a .def file for building libcurl.dll.
 */
#if (defined(WIN32) || defined(_WIN32) || defined(__SYMBIAN32__)) && \
     !defined(CURL_STATICLIB)
#if defined(BUILDING_LIBCURL)
#define CURL_EXTERN  __declspec(dllexport)
#else
#define CURL_EXTERN  __declspec(dllimport)
#endif
#else

#ifdef CURL_HIDDEN_SYMBOLS
/*
 * This definition is used to make external definitions visible in the
 * shared library when symbols are hidden by default.  It makes no
 * difference when compiling applications whether this is set or not,
 * only when compiling the library.
 */
#define CURL_EXTERN CURL_EXTERN_SYMBOL
#else
#define CURL_EXTERN
#endif
#endif

#ifndef curl_socket_typedef
/* socket typedef */
#ifdef WIN32
typedef SOCKET curl_socket_t;
#define CURL_SOCKET_BAD INVALID_SOCKET
#else
typedef int curl_socket_t;
#define CURL_SOCKET_BAD -1
#endif
#define curl_socket_typedef
#endif /* curl_socket_typedef */

struct curl_httppost {
  struct curl_httppost *next;       /* next entry in the list */
  char *name;                       /* pointer to allocated name */
  long namelength;                  /* length of name length */
  char *contents;                   /* pointer to allocated data contents */
  long contentslength;              /* length of contents field */
  char *buffer;                     /* pointer to allocated buffer contents */
  long bufferlength;                /* length of buffer field */
  char *contenttype;                /* Content-Type */
  struct curl_slist* contentheader; /* list of extra headers for this form */
  struct curl_httppost *more;       /* if one field name has more than one
                                       file, this link should link to following
                                       files */
  long flags;                       /* as defined below */
#define HTTPPOST_FILENAME (1<<0)    /* specified content is a file name */
#define HTTPPOST_READFILE (1<<1)    /* specified content is a file name */
#define HTTPPOST_PTRNAME (1<<2)     /* name is only stored pointer
                                       do not free in formfree */
#define HTTPPOST_PTRCONTENTS (1<<3) /* contents is only stored pointer
                                       do not free in formfree */
#define HTTPPOST_BUFFER (1<<4)      /* upload file from buffer */
#define HTTPPOST_PTRBUFFER (1<<5)   /* upload file from pointer contents */
#define HTTPPOST_CALLBACK (1<<6)    /* upload file contents by using the
                                       regular read callback to get the data
                                       and pass the given pointer as custom
                                       pointer */

  char *showfilename;               /* The file name to show. If not set, the
                                       actual file name will be used (if this
                                       is a file part) */
  void *userp;                      /* custom pointer used for
                                       HTTPPOST_CALLBACK posts */
};

typedef int (*curl_progress_callback)(void *clientp,
                                      double dltotal,
                                      double dlnow,
                                      double ultotal,
                                      double ulnow);

#ifndef CURL_MAX_WRITE_SIZE
  /* Tests have proven that 20K is a very bad buffer size for uploads on
     Windows, while 16K for some odd reason performed a lot better.
     We do the ifndef check to allow this value to easier be changed at build
     time for those who feel adventurous. */
#define CURL_MAX_WRITE_SIZE 16384
#endif
/* This is a magic return code for the write callback that, when returned,
   will signal libcurl to pause receiving on the current transfer. */
#define CURL_WRITEFUNC_PAUSE 0x10000001
typedef size_t (*curl_write_callback)(char *buffer,
                                      size_t size,
                                      size_t nitems,
                                      void *outstream);

/* this is the return codes for the seek callbacks */
#define CURL_SEEKFUNC_OK       0
#define CURL_SEEKFUNC_FAIL     1 /* fail the entire transfer */
#define CURL_SEEKFUNC_CANTSEEK 2 /* tell libcurl seeking can't be done, so
                                    libcurl might try other means instead */
typedef int (*curl_seek_callback)(void *instream,
                                  curl_off_t offset,
                                  int origin); /* 'whence' */

/* This is a return code for the read callback that, when returned, will
   signal libcurl to immediately abort the current transfer. */
#define CURL_READFUNC_ABORT 0x10000000