void SplitAddAttr (Collection* C, const char* Combined, const char* Name)
/* Split a combined name/value pair and add it as an attribute to C. Some
* attributes may not need a name. If the name is missing, use Name. If
* Name is NULL, terminate with an error.
*/
{
/* Name and value are separated by an equal sign */
const char* Pos = strchr (Combined, '=');
if (Pos == 0) {
/* Combined is actually a value */
if (Name == 0) {
Error ("Command line attribute `%s' doesn't contain a name", Combined);
}
AddAttr (C, Name, Combined);
} else {
/* Must split name and value */
StrBuf N = AUTO_STRBUF_INITIALIZER;
SB_CopyBuf (&N, Combined, Pos - Combined);
SB_Terminate (&N);
/* Add the attribute */
AddAttr (C, SB_GetConstBuf (&N), Pos+1);
/* Release memory */
SB_Done (&N);
}
}
static AFile* NewAFile (IFile* IF, FILE* F)
/* Create a new AFile, push it onto the stack, add the path of the file to
* the path search list, and finally return a pointer to the new AFile struct.
*/
{
StrBuf Path = AUTO_STRBUF_INITIALIZER;
/* Allocate a AFile structure */
AFile* AF = (AFile*) xmalloc (sizeof (AFile));
/* Initialize the fields */
AF->Line = 0;
AF->F = F;
AF->Input = IF;
/* Increment the usage counter of the corresponding IFile. If this
* is the first use, set the file data and output debug info if
* requested.
*/
if (IF->Usage++ == 0) {
/* Get file size and modification time. 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 (FileStat (IF->Name, &Buf) != 0) {
/* Error */
Fatal ("Cannot stat `%s': %s", IF->Name, strerror (errno));
}
IF->Size = (unsigned long) Buf.st_size;
IF->MTime = (unsigned long) Buf.st_mtime;
/* Set the debug data */
g_fileinfo (IF->Name, IF->Size, IF->MTime);
}
/* Insert the new structure into the AFile collection */
CollAppend (&AFiles, AF);
/* Get the path of this file and add it as an extra search path.
* To avoid file search overhead, we will add one path only once.
* This is checked by the PushSearchPath function.
*/
SB_CopyBuf (&Path, IF->Name, FindName (IF->Name) - IF->Name);
SB_Terminate (&Path);
AF->SearchPath = PushSearchPath (UsrIncSearchPath, SB_GetConstBuf (&Path));
SB_Done (&Path);
/* Return the new struct */
return AF;
}
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;
}