Imported Upstream version 1.5

[routino] / src / files.c

diff --git a/src/files.c b/src/files.c
index ce595ab..8e54025 100644 (file)
--- a/src/files.c
+++ b/src/files.c
@@ -1,5 +1,5 @@
 /***************************************
- $Header: /home/amb/routino/src/RCS/files.c,v 1.18 2010/03/29 18:20:06 amb Exp $
+ $Header: /home/amb/routino/src/RCS/files.c,v 1.24 2010/10/16 10:59:18 amb Exp $
 
  Functions to handle files.
 
@@ -21,9 +21,11 @@
  along with this program.  If not, see <http://www.gnu.org/licenses/>.
  ***************************************/
 
+#include <assert.h>
 
 #include <unistd.h>
 #include <stdlib.h>
+#include <stdio.h>
 #include <string.h>
 #include <fcntl.h>
 #include <errno.h>
@@ -31,7 +33,7 @@
 #include <sys/mman.h>
 #include <sys/types.h>
 
-#include "functions.h"
+#include "files.h"
 
 
 /*+ A structure to contain the list of memory mapped files. +*/
@@ -100,7 +102,54 @@ void *MapFile(const char *filename)
    {
     close(fd);
 
-    fprintf(stderr,"Cannot mmap file '%s' [%s].\n",filename,strerror(errno));
+    assert(0);
+
+    fprintf(stderr,"Cannot mmap file '%s' for reading [%s].\n",filename,strerror(errno));
+    exit(EXIT_FAILURE);
+   }
+
+ mappedfiles=(struct mmapinfo*)realloc((void*)mappedfiles,(nmappedfiles+1)*sizeof(struct mmapinfo));
+
+ mappedfiles[nmappedfiles].filename=filename;
+ mappedfiles[nmappedfiles].fd=fd;
+ mappedfiles[nmappedfiles].address=address;
+ mappedfiles[nmappedfiles].length=size;
+
+ nmappedfiles++;
+
+ return(address);
+}
+
+
+/*++++++++++++++++++++++++++++++++++++++
+  Open a file and map it into memory.
+
+  void *MapFileWriteable Returns the address of the file or exits in case of an error.
+
+  const char *filename The name of the file to open.
+  ++++++++++++++++++++++++++++++++++++++*/
+
+void *MapFileWriteable(const char *filename)
+{
+ int fd;
+ off_t size;
+ void *address;
+
+ /* Open the file and get its size */
+
+ fd=ReOpenFileWriteable(filename);
+
+ size=SizeFile(filename);
+
+ /* Map the file */
+
+ address=mmap(NULL,size,PROT_READ|PROT_WRITE,MAP_SHARED,fd,0);
+
+ if(address==MAP_FAILED)
+   {
+    close(fd);
+
+    fprintf(stderr,"Cannot mmap file '%s' for reading and writing [%s].\n",filename,strerror(errno));
     exit(EXIT_FAILURE);
    }
 
@@ -161,18 +210,18 @@ void *UnmapFile(const char *filename)
 /*++++++++++++++++++++++++++++++++++++++
   Open a new file on disk for writing to.
 
-  int OpenFile Returns the file descriptor if OK or exits in case of an error.
+  int OpenFileNew Returns the file descriptor if OK or exits in case of an error.
 
   const char *filename The name of the file to create.
   ++++++++++++++++++++++++++++++++++++++*/
 
-int OpenFile(const char *filename)
+int OpenFileNew(const char *filename)
 {
  int fd;
 
  /* Open the file */
 
- fd=open(filename,O_WRONLY|O_CREAT|O_TRUNC,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
+ fd=open(filename,O_RDWR|O_CREAT|O_TRUNC,S_IRUSR|S_IWUSR|S_IRGRP|S_IROTH);
 
  if(fd<0)
    {
@@ -185,14 +234,14 @@ int OpenFile(const char *filename)
 
 
 /*++++++++++++++++++++++++++++++++++++++
-  Open a new file on disk for reading and appending.
+  Open a new file on disk for reading from and appending.
 
-  int AppendFile Returns the file descriptor if OK or exits in case of an error.
+  int OpenFileAppend Returns the file descriptor if OK or exits in case of an error.
 
   const char *filename The name of the file to create.
   ++++++++++++++++++++++++++++++++++++++*/
 
-int AppendFile(const char *filename)
+int OpenFileAppend(const char *filename)
 {
  int fd;
 
@@ -211,7 +260,7 @@ int AppendFile(const char *filename)
 
 
 /*++++++++++++++++++++++++++++++++++++++
-  Open an existing file on disk for reading from.
+  Open an existing file on disk for reading.
 
   int ReOpenFile Returns the file descriptor if OK or exits in case of an error.
 
@@ -237,48 +286,28 @@ int ReOpenFile(const char *filename)
 
 
 /*++++++++++++++++++++++++++++++++++++++
-  Write data to a file on disk.
-
-  int WriteFile Returns 0 if OK or something else in case of an error.
+  Open an existing file on disk for reading from or writing to.
 
-  int fd The file descriptor to write to.
+  int ReOpenFileWriteable Returns the file descriptor if OK or exits in case of an error.
 
-  const void *address The address of the data to be written from.
-
-  size_t length The length of data to write.
+  const char *filename The name of the file to open.
   ++++++++++++++++++++++++++++++++++++++*/
 
-int WriteFile(int fd,const void *address,size_t length)
+int ReOpenFileWriteable(const char *filename)
 {
- /* Write the data */
-
- if(write(fd,address,length)!=length)
-    return(-1);
-
- return(0);
-}
-
-
-/*++++++++++++++++++++++++++++++++++++++
-  Read data from a file on disk.
-
-  int ReadFile Returns 0 if OK or something else in case of an error.
-
-  int fd The file descriptor to read from.
-
-  void *address The address of the data to be read into.
+ int fd;
 
-  size_t length The length of data to read.
-  ++++++++++++++++++++++++++++++++++++++*/
+ /* Open the file */
 
-int ReadFile(int fd,void *address,size_t length)
-{
- /* Read the data */
+ fd=open(filename,O_RDWR);
 
- if(read(fd,address,length)!=length)
-    return(-1);
+ if(fd<0)
+   {
+    fprintf(stderr,"Cannot open file '%s' for reading and writing [%s].\n",filename,strerror(errno));
+    exit(EXIT_FAILURE);
+   }
 
- return(0);
+ return(fd);
 }
 
 
@@ -324,27 +353,6 @@ int ExistsFile(const char *filename)
 
 
 /*++++++++++++++++++++++++++++++++++++++
-  Seek to a position in a file on disk.
-
-  int SeekFile Returns 0 if OK or something else in case of an error.
-
-  int fd The file descriptor to seek within.
-
-  off_t position The position to seek to.
-  ++++++++++++++++++++++++++++++++++++++*/
-
-int SeekFile(int fd,off_t position)
-{
- /* Seek the data */
-
- if(lseek(fd,position,SEEK_SET)!=position)
-    return(-1);
-
- return(0);
-}
-
-
-/*++++++++++++++++++++++++++++++++++++++
   Close a file on disk.
 
   int fd The file descriptor to close.