int NewInputFile (const char* Name)
/* Open a new input file. Returns true if the file could be successfully opened
** and false otherwise.
*/
{
int RetCode = 0; /* Return code. Assume an error. */
char* PathName = 0;
FILE* F;
struct stat Buf;
StrBuf NameBuf; /* No need to initialize */
StrBuf Path = AUTO_STRBUF_INITIALIZER;
unsigned FileIdx;
CharSource* S;
/* If this is the main file, just try to open it. If it's an include file,
** search for it using the include path list.
*/
if (FCount == 0) {
/* Main file */
F = fopen (Name, "r");
if (F == 0) {
Fatal ("Cannot open input file '%s': %s", Name, strerror (errno));
}
} else {
/* We are on include level. Search for the file in the include
** directories.
*/
PathName = SearchFile (IncSearchPath, Name);
if (PathName == 0 || (F = fopen (PathName, "r")) == 0) {
/* Not found or cannot open, print an error and bail out */
Error ("Cannot open include file '%s': %s", Name, strerror (errno));
goto ExitPoint;
}
/* Use the path name from now on */
Name = PathName;
}
/* Stat the file and remember the values. There's a race condition here,
** since we cannot use fileno() (non-standard identifier in standard
** header file), and therefore not fstat. When using stat with the
** file name, there's a risk that the file was deleted and recreated
** while it was open. Since mtime and size are only used to check
** if a file has changed in the debugger, we will ignore this problem
** here.
*/
if (FileStat (Name, &Buf) != 0) {
Fatal ("Cannot stat input file '%s': %s", Name, strerror (errno));
}
/* Add the file to the input file table and remember the index */
FileIdx = AddFile (SB_InitFromString (&NameBuf, Name),
(FCount == 0)? FT_MAIN : FT_INCLUDE,
Buf.st_size, (unsigned long) Buf.st_mtime);
/* Create a new input source variable and initialize it */
S = xmalloc (sizeof (*S));
S->Func = &IFFunc;
S->V.File.F = F;
S->V.File.Pos.Line = 0;
S->V.File.Pos.Col = 0;
S->V.File.Pos.Name = FileIdx;
SB_Init (&S->V.File.Line);
/* Push the path for this file onto the include search lists */
SB_CopyBuf (&Path, Name, FindName (Name) - Name);
SB_Terminate (&Path);
S->V.File.IncSearchPath = PushSearchPath (IncSearchPath, SB_GetConstBuf (&Path));
S->V.File.BinSearchPath = PushSearchPath (BinSearchPath, SB_GetConstBuf (&Path));
SB_Done (&Path);
/* Count active input files */
++FCount;
/* Use this input source */
UseCharSource (S);
/* File successfully opened */
RetCode = 1;
ExitPoint:
/* Free an allocated name buffer */
xfree (PathName);
/* Return the success code */
return RetCode;
}
int NewInputFile (const char* Name)
/* Open a new input file. Returns true if the file could be successfully opened
* and false otherwise.
*/
{
int RetCode = 0; /* Return code. Assume an error. */
char* PathName = 0;
/* First try to open the file */
FILE* F = fopen (Name, "r");
if (F == 0) {
/* Error (fatal error if this is the main file) */
if (FCount == 0) {
Fatal ("Cannot open input file `%s': %s", Name, strerror (errno));
}
/* We are on include level. Search for the file in the include
* directories.
*/
PathName = FindInclude (Name);
if (PathName == 0 || (F = fopen (PathName, "r")) == 0) {
/* Not found or cannot open, print an error and bail out */
Error ("Cannot open include file `%s': %s", Name, strerror (errno));
goto ExitPoint;
}
/* Use the path name from now on */
Name = PathName;
}
/* check again if we do now have an open file */
if (F != 0) {
StrBuf NameBuf;
unsigned FileIdx;
CharSource* S;
/* Stat the file and remember the values. There a race condition here,
* since we cannot use fileno() (non standard identifier in standard
* header file), and therefore not fstat. When using stat with the
* file name, there's a risk that the file was deleted and recreated
* while it was open. Since mtime and size are only used to check
* if a file has changed in the debugger, we will ignore this problem
* here.
*/
struct stat Buf;
if (stat (Name, &Buf) != 0) {
Fatal ("Cannot stat input file `%s': %s", Name, strerror (errno));
}
/* Add the file to the input file table and remember the index */
FileIdx = AddFile (SB_InitFromString (&NameBuf, Name), Buf.st_size, Buf.st_mtime);
/* Create a new input source variable and initialize it */
S = xmalloc (sizeof (*S));
S->Func = &IFFunc;
S->V.File.F = F;
S->V.File.Pos.Line = 0;
S->V.File.Pos.Col = 0;
S->V.File.Pos.Name = FileIdx;
S->V.File.Line[0] = '\0';
/* Count active input files */
++FCount;
/* Use this input source */
UseCharSource (S);
}
/* File successfully opened */
RetCode = 1;
ExitPoint:
/* Free an allocated name buffer */
xfree (PathName);
/* Return the success code */
return RetCode;
}