Revert changes relative to lib/*.[ch] recent renaming

This reverts renaming and usage of lib/*.h header files done
28-12-2012, reverting 2 commits:

  f871de0... build: make use of 76 lib/*.h renamed files
  ffd8e12... build: rename 76 lib/*.h files

This also reverts removal of redundant include guard (redundant thanks
to changes in above commits) done 2-12-2013, reverting 1 commit:

  c087374... curl_setup.h: remove redundant include guard

This also reverts renaming and usage of lib/*.c source files done
3-12-2013, reverting 3 commits:

  13606bb... build: make use of 93 lib/*.c renamed files
  5b6e792... build: rename 93 lib/*.c files
  7d83dff... build: commit 13606bbfde follow-up 1

Start of related discussion thread:

  http://curl.haxx.se/mail/lib-2013-01/0012.html

Asking for confirmation on pushing this revertion commit:

  http://curl.haxx.se/mail/lib-2013-01/0048.html

Confirmation summary:

  http://curl.haxx.se/mail/lib-2013-01/0079.html

NOTICE: The list of 2 files that have been modified by other
intermixed commits, while renamed, and also by at least one
of the 6 commits this one reverts follows below. These 2 files
will exhibit a hole in history unless git's '--follow' option
is used when viewing logs.

  lib/curl_imap.h
  lib/curl_smtp.h

1 files changed, 591 insertions, 0 deletions

diff --git a/lib/file.c b/lib/file.c
new file mode 100644
index 000000000..886a09e24
--- /dev/null
+++ b/lib/file.c
@@ -0,0 +1,591 @@
+/***************************************************************************
+ *                                  _   _ ____  _
+ *  Project                     ___| | | |  _ \| |
+ *                             / __| | | | |_) | |
+ *                            | (__| |_| |  _ <| |___
+ *                             \___|\___/|_| \_\_____|
+ *
+ * Copyright (C) 1998 - 2012, 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.
+ *
+ ***************************************************************************/
+
+#include "setup.h"
+
+#ifndef CURL_DISABLE_FILE
+
+#ifdef HAVE_NETINET_IN_H
+#include <netinet/in.h>
+#endif
+#ifdef HAVE_NETDB_H
+#include <netdb.h>
+#endif
+#ifdef HAVE_ARPA_INET_H
+#include <arpa/inet.h>
+#endif
+#ifdef HAVE_NET_IF_H
+#include <net/if.h>
+#endif
+#ifdef HAVE_SYS_IOCTL_H
+#include <sys/ioctl.h>
+#endif
+
+#ifdef HAVE_SYS_PARAM_H
+#include <sys/param.h>
+#endif
+
+#ifdef HAVE_FCNTL_H
+#include <fcntl.h>
+#endif
+
+#include "strtoofft.h"
+#include "urldata.h"
+#include <curl/curl.h>
+#include "progress.h"
+#include "sendf.h"
+#include "escape.h"
+#include "file.h"
+#include "speedcheck.h"
+#include "getinfo.h"
+#include "transfer.h"
+#include "url.h"
+#include "curl_memory.h"
+#include "parsedate.h" /* for the week day and month names */
+#include "warnless.h"
+
+#define _MPRINTF_REPLACE /* use our functions only */
+#include <curl/mprintf.h>
+
+/* The last #include file should be: */
+#include "memdebug.h"
+
+#if defined(WIN32) || defined(MSDOS) || defined(__EMX__) || \
+  defined(__SYMBIAN32__)
+#define DOS_FILESYSTEM 1
+#endif
+
+#ifdef OPEN_NEEDS_ARG3
+#  define open_readonly(p,f) open((p),(f),(0))
+#else
+#  define open_readonly(p,f) open((p),(f))
+#endif
+
+/*
+ * Forward declarations.
+ */
+
+static CURLcode file_do(struct connectdata *, bool *done);
+static CURLcode file_done(struct connectdata *conn,
+                          CURLcode status, bool premature);
+static CURLcode file_connect(struct connectdata *conn, bool *done);
+static CURLcode file_disconnect(struct connectdata *conn,
+                                bool dead_connection);
+
+
+/*
+ * FILE scheme handler.
+ */
+
+const struct Curl_handler Curl_handler_file = {
+  "FILE",                               /* scheme */
+  ZERO_NULL,                            /* setup_connection */
+  file_do,                              /* do_it */
+  file_done,                            /* done */
+  ZERO_NULL,                            /* do_more */
+  file_connect,                         /* connect_it */
+  ZERO_NULL,                            /* connecting */
+  ZERO_NULL,                            /* doing */
+  ZERO_NULL,                            /* proto_getsock */
+  ZERO_NULL,                            /* doing_getsock */
+  ZERO_NULL,                            /* domore_getsock */
+  ZERO_NULL,                            /* perform_getsock */
+  file_disconnect,                      /* disconnect */
+  ZERO_NULL,                            /* readwrite */
+  0,                                    /* defport */
+  CURLPROTO_FILE,                       /* protocol */
+  PROTOPT_NONETWORK | PROTOPT_NOURLQUERY /* flags */
+};
+
+
+ /*
+  Check if this is a range download, and if so, set the internal variables
+  properly. This code is copied from the FTP implementation and might as
+  well be factored out.
+ */
+static CURLcode file_range(struct connectdata *conn)
+{
+  curl_off_t from, to;
+  curl_off_t totalsize=-1;
+  char *ptr;
+  char *ptr2;
+  struct SessionHandle *data = conn->data;
+
+  if(data->state.use_range && data->state.range) {
+    from=curlx_strtoofft(data->state.range, &ptr, 0);
+    while(*ptr && (ISSPACE(*ptr) || (*ptr=='-')))
+      ptr++;
+    to=curlx_strtoofft(ptr, &ptr2, 0);
+    if(ptr == ptr2) {
+      /* we didn't get any digit */
+      to=-1;
+    }
+    if((-1 == to) && (from>=0)) {
+      /* X - */
+      data->state.resume_from = from;
+      DEBUGF(infof(data, "RANGE %" FORMAT_OFF_T " to end of file\n",
+                   from));
+    }
+    else if(from < 0) {
+      /* -Y */
+      data->req.maxdownload = -from;
+      data->state.resume_from = from;
+      DEBUGF(infof(data, "RANGE the last %" FORMAT_OFF_T " bytes\n",
+                   -from));
+    }
+    else {
+      /* X-Y */
+      totalsize = to-from;
+      data->req.maxdownload = totalsize+1; /* include last byte */
+      data->state.resume_from = from;
+      DEBUGF(infof(data, "RANGE from %" FORMAT_OFF_T
+                   " getting %" FORMAT_OFF_T " bytes\n",
+                   from, data->req.maxdownload));
+    }
+    DEBUGF(infof(data, "range-download from %" FORMAT_OFF_T
+                 " to %" FORMAT_OFF_T ", totally %" FORMAT_OFF_T " bytes\n",
+                 from, to, data->req.maxdownload));
+  }
+  else
+    data->req.maxdownload = -1;
+  return CURLE_OK;
+}
+
+/*
+ * file_connect() gets called from Curl_protocol_connect() to allow us to
+ * do protocol-specific actions at connect-time.  We emulate a
+ * connect-then-transfer protocol and "connect" to the file here
+ */
+static CURLcode file_connect(struct connectdata *conn, bool *done)
+{
+  struct SessionHandle *data = conn->data;
+  char *real_path;
+  struct FILEPROTO *file;
+  int fd;
+#ifdef DOS_FILESYSTEM
+  int i;
+  char *actual_path;
+#endif
+
+  /* If there already is a protocol-specific struct allocated for this
+     sessionhandle, deal with it */
+  Curl_reset_reqproto(conn);
+
+  real_path = curl_easy_unescape(data, data->state.path, 0, NULL);
+  if(!real_path)
+    return CURLE_OUT_OF_MEMORY;
+
+  if(!data->state.proto.file) {
+    file = calloc(1, sizeof(struct FILEPROTO));
+    if(!file) {
+      free(real_path);
+      return CURLE_OUT_OF_MEMORY;
+    }
+    data->state.proto.file = file;
+  }
+  else {
+    /* file is not a protocol that can deal with "persistancy" */
+    file = data->state.proto.file;
+    Curl_safefree(file->freepath);
+    file->path = NULL;
+    if(file->fd != -1)
+      close(file->fd);
+    file->fd = -1;
+  }
+
+#ifdef DOS_FILESYSTEM
+  /* If the first character is a slash, and there's
+     something that looks like a drive at the beginning of
+     the path, skip the slash.  If we remove the initial
+     slash in all cases, paths without drive letters end up
+     relative to the current directory which isn't how
+     browsers work.
+
+     Some browsers accept | instead of : as the drive letter
+     separator, so we do too.
+
+     On other platforms, we need the slash to indicate an
+     absolute pathname.  On Windows, absolute paths start
+     with a drive letter.
+  */
+  actual_path = real_path;
+  if((actual_path[0] == '/') &&
+      actual_path[1] &&
+     (actual_path[2] == ':' || actual_path[2] == '|')) {
+    actual_path[2] = ':';
+    actual_path++;
+  }
+
+  /* change path separators from '/' to '\\' for DOS, Windows and OS/2 */
+  for(i=0; actual_path[i] != '\0'; ++i)
+    if(actual_path[i] == '/')
+      actual_path[i] = '\\';
+
+  fd = open_readonly(actual_path, O_RDONLY|O_BINARY);
+  file->path = actual_path;
+#else
+  fd = open_readonly(real_path, O_RDONLY);
+  file->path = real_path;
+#endif
+  file->freepath = real_path; /* free this when done */
+
+  file->fd = fd;
+  if(!data->set.upload && (fd == -1)) {
+    failf(data, "Couldn't open file %s", data->state.path);
+    file_done(conn, CURLE_FILE_COULDNT_READ_FILE, FALSE);
+    return CURLE_FILE_COULDNT_READ_FILE;
+  }
+  *done = TRUE;
+
+  return CURLE_OK;
+}
+
+static CURLcode file_done(struct connectdata *conn,
+                               CURLcode status, bool premature)
+{
+  struct FILEPROTO *file = conn->data->state.proto.file;
+  (void)status; /* not used */
+  (void)premature; /* not used */
+
+  if(file) {
+    Curl_safefree(file->freepath);
+    file->path = NULL;
+    if(file->fd != -1)
+      close(file->fd);
+    file->fd = -1;
+  }
+
+  return CURLE_OK;
+}
+
+static CURLcode file_disconnect(struct connectdata *conn,
+                                bool dead_connection)
+{
+  struct FILEPROTO *file = conn->data->state.proto.file;
+  (void)dead_connection; /* not used */
+
+  if(file) {
+    Curl_safefree(file->freepath);
+    file->path = NULL;
+    if(file->fd != -1)
+      close(file->fd);
+    file->fd = -1;
+  }
+
+  return CURLE_OK;
+}
+
+#ifdef DOS_FILESYSTEM
+#define DIRSEP '\\'
+#else
+#define DIRSEP '/'
+#endif
+
+static CURLcode file_upload(struct connectdata *conn)
+{
+  struct FILEPROTO *file = conn->data->state.proto.file;
+  const char *dir = strchr(file->path, DIRSEP);
+  int fd;
+  int mode;
+  CURLcode res=CURLE_OK;
+  struct SessionHandle *data = conn->data;
+  char *buf = data->state.buffer;
+  size_t nread;
+  size_t nwrite;
+  curl_off_t bytecount = 0;
+  struct timeval now = Curl_tvnow();
+  struct_stat file_stat;
+  const char* buf2;
+
+  /*
+   * Since FILE: doesn't do the full init, we need to provide some extra
+   * assignments here.
+   */
+  conn->fread_func = data->set.fread_func;
+  conn->fread_in = data->set.in;
+  conn->data->req.upload_fromhere = buf;
+
+  if(!dir)
+    return CURLE_FILE_COULDNT_READ_FILE; /* fix: better error code */
+
+  if(!dir[1])
+    return CURLE_FILE_COULDNT_READ_FILE; /* fix: better error code */
+
+#ifdef O_BINARY
+#define MODE_DEFAULT O_WRONLY|O_CREAT|O_BINARY
+#else
+#define MODE_DEFAULT O_WRONLY|O_CREAT
+#endif
+
+  if(data->state.resume_from)
+    mode = MODE_DEFAULT|O_APPEND;
+  else
+    mode = MODE_DEFAULT|O_TRUNC;
+
+  fd = open(file->path, mode, conn->data->set.new_file_perms);
+  if(fd < 0) {
+    failf(data, "Can't open %s for writing", file->path);
+    return CURLE_WRITE_ERROR;
+  }
+
+  if(-1 != data->set.infilesize)
+    /* known size of data to "upload" */
+    Curl_pgrsSetUploadSize(data, data->set.infilesize);
+
+  /* treat the negative resume offset value as the case of "-" */
+  if(data->state.resume_from < 0) {
+    if(fstat(fd, &file_stat)) {
+      close(fd);
+      failf(data, "Can't get the size of %s", file->path);
+      return CURLE_WRITE_ERROR;
+    }
+    else
+      data->state.resume_from = (curl_off_t)file_stat.st_size;
+  }
+
+  while(res == CURLE_OK) {
+    int readcount;
+    res = Curl_fillreadbuffer(conn, BUFSIZE, &readcount);
+    if(res)
+      break;
+
+    if(readcount <= 0)  /* fix questionable compare error. curlvms */
+      break;
+
+    nread = (size_t)readcount;
+
+    /*skip bytes before resume point*/
+    if(data->state.resume_from) {
+      if((curl_off_t)nread <= data->state.resume_from ) {
+        data->state.resume_from -= nread;
+        nread = 0;
+        buf2 = buf;
+      }
+      else {
+        buf2 = buf + data->state.resume_from;
+        nread -= (size_t)data->state.resume_from;
+        data->state.resume_from = 0;
+      }
+    }
+    else
+      buf2 = buf;
+
+    /* write the data to the target */
+    nwrite = write(fd, buf2, nread);
+    if(nwrite != nread) {
+      res = CURLE_SEND_ERROR;
+      break;
+    }
+
+    bytecount += nread;
+
+    Curl_pgrsSetUploadCounter(data, bytecount);
+
+    if(Curl_pgrsUpdate(conn))
+      res = CURLE_ABORTED_BY_CALLBACK;
+    else
+      res = Curl_speedcheck(data, now);
+  }
+  if(!res && Curl_pgrsUpdate(conn))
+    res = CURLE_ABORTED_BY_CALLBACK;
+
+  close(fd);
+
+  return res;
+}
+
+/*
+ * file_do() is the protocol-specific function for the do-phase, separated
+ * from the connect-phase above. Other protocols merely setup the transfer in
+ * the do-phase, to have it done in the main transfer loop but since some
+ * platforms we support don't allow select()ing etc on file handles (as
+ * opposed to sockets) we instead perform the whole do-operation in this
+ * function.
+ */
+static CURLcode file_do(struct connectdata *conn, bool *done)
+{
+  /* This implementation ignores the host name in conformance with
+     RFC 1738. Only local files (reachable via the standard file system)
+     are supported. This means that files on remotely mounted directories
+     (via NFS, Samba, NT sharing) can be accessed through a file:// URL
+  */
+  CURLcode res = CURLE_OK;
+  struct_stat statbuf; /* struct_stat instead of struct stat just to allow the
+                          Windows version to have a different struct without
+                          having to redefine the simple word 'stat' */
+  curl_off_t expected_size=0;
+  bool fstated=FALSE;
+  ssize_t nread;
+  struct SessionHandle *data = conn->data;
+  char *buf = data->state.buffer;
+  curl_off_t bytecount = 0;
+  int fd;
+  struct timeval now = Curl_tvnow();
+
+  *done = TRUE; /* unconditionally */
+
+  Curl_initinfo(data);
+  Curl_pgrsStartNow(data);
+
+  if(data->set.upload)
+    return file_upload(conn);
+
+  /* get the fd from the connection phase */
+  fd = conn->data->state.proto.file->fd;
+
+  /* VMS: This only works reliable for STREAMLF files */
+  if(-1 != fstat(fd, &statbuf)) {
+    /* we could stat it, then read out the size */
+    expected_size = statbuf.st_size;
+    /* and store the modification time */
+    data->info.filetime = (long)statbuf.st_mtime;
+    fstated = TRUE;
+  }
+
+  if(fstated && !data->state.range && data->set.timecondition) {
+    if(!Curl_meets_timecondition(data, (time_t)data->info.filetime)) {
+      *done = TRUE;
+      return CURLE_OK;
+    }
+  }
+
+  /* If we have selected NOBODY and HEADER, it means that we only want file
+     information. Which for FILE can't be much more than the file size and
+     date. */
+  if(data->set.opt_no_body && data->set.include_header && fstated) {
+    CURLcode result;
+    snprintf(buf, sizeof(data->state.buffer),
+             "Content-Length: %" FORMAT_OFF_T "\r\n", expected_size);
+    result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
+    if(result)
+      return result;
+
+    result = Curl_client_write(conn, CLIENTWRITE_BOTH,
+                               (char *)"Accept-ranges: bytes\r\n", 0);
+    if(result)
+      return result;
+
+    if(fstated) {
+      time_t filetime = (time_t)statbuf.st_mtime;
+      struct tm buffer;
+      const struct tm *tm = &buffer;
+      result = Curl_gmtime(filetime, &buffer);
+      if(result)
+        return result;
+
+      /* format: "Tue, 15 Nov 1994 12:45:26 GMT" */
+      snprintf(buf, BUFSIZE-1,
+               "Last-Modified: %s, %02d %s %4d %02d:%02d:%02d GMT\r\n",
+               Curl_wkday[tm->tm_wday?tm->tm_wday-1:6],
+               tm->tm_mday,
+               Curl_month[tm->tm_mon],
+               tm->tm_year + 1900,
+               tm->tm_hour,
+               tm->tm_min,
+               tm->tm_sec);
+      result = Curl_client_write(conn, CLIENTWRITE_BOTH, buf, 0);
+    }
+    /* if we fstat()ed the file, set the file size to make it available post-
+       transfer */
+    if(fstated)
+      Curl_pgrsSetDownloadSize(data, expected_size);
+    return result;
+  }
+
+  /* Check whether file range has been specified */
+  file_range(conn);
+
+  /* Adjust the start offset in case we want to get the N last bytes
+   * of the stream iff the filesize could be determined */
+  if(data->state.resume_from < 0) {
+    if(!fstated) {
+      failf(data, "Can't get the size of file.");
+      return CURLE_READ_ERROR;
+    }
+    else
+      data->state.resume_from += (curl_off_t)statbuf.st_size;
+  }
+
+  if(data->state.resume_from <= expected_size)
+    expected_size -= data->state.resume_from;
+  else {
+    failf(data, "failed to resume file:// transfer");
+    return CURLE_BAD_DOWNLOAD_RESUME;
+  }
+
+  /* A high water mark has been specified so we obey... */
+  if(data->req.maxdownload > 0)
+    expected_size = data->req.maxdownload;
+
+  if(fstated && (expected_size == 0))
+    return CURLE_OK;
+
+  /* The following is a shortcut implementation of file reading
+     this is both more efficient than the former call to download() and
+     it avoids problems with select() and recv() on file descriptors
+     in Winsock */
+  if(fstated)
+    Curl_pgrsSetDownloadSize(data, expected_size);
+
+  if(data->state.resume_from) {
+    if(data->state.resume_from !=
+       lseek(fd, data->state.resume_from, SEEK_SET))
+      return CURLE_BAD_DOWNLOAD_RESUME;
+  }
+
+  Curl_pgrsTime(data, TIMER_STARTTRANSFER);
+
+  while(res == CURLE_OK) {
+    /* Don't fill a whole buffer if we want less than all data */
+    size_t bytestoread =
+      (expected_size < CURL_OFF_T_C(BUFSIZE) - CURL_OFF_T_C(1)) ?
+      curlx_sotouz(expected_size) : BUFSIZE - 1;
+
+    nread = read(fd, buf, bytestoread);
+
+    if(nread > 0)
+      buf[nread] = 0;
+
+    if(nread <= 0 || expected_size == 0)
+      break;
+
+    bytecount += nread;
+    expected_size -= nread;
+
+    res = Curl_client_write(conn, CLIENTWRITE_BODY, buf, nread);
+    if(res)
+      return res;
+
+    Curl_pgrsSetDownloadCounter(data, bytecount);
+
+    if(Curl_pgrsUpdate(conn))
+      res = CURLE_ABORTED_BY_CALLBACK;
+    else
+      res = Curl_speedcheck(data, now);
+  }
+  if(Curl_pgrsUpdate(conn))
+    res = CURLE_ABORTED_BY_CALLBACK;
+
+  return res;
+}
+
+#endif