languages/cpython
languages/cpython
1
0
Fork 0
mirror of https://github.com/python/cpython synced 2024-10-14 10:33:27 +00:00
Code Issues Packages Projects Releases Wiki Activity

Sigh. More restructuring was needed.

Browse source 
Make an explicit test for whether the prefix is in fact the
source directory, and then don't use the registry.
This commit is contained in:
Guido van Rossum 1998-08-08 23:40:40 +00:00
parent 7fb668866d
commit 43ff114d2b
1 changed files with 57 additions and 27 deletions
Show stats Download patch file Download diff file Expand all files Collapse all files

84
PC/getpathp.c
View file

@ -98,6 +98,23 @@ exists(filename)
}
static int
ismodule(filename) /* Is module -- check for .pyc/.pyo too */
char *filename;
{
if (exists(filename))
return 1;
/* Check for the compiled version of prefix. */
if (strlen(filename) < MAXPATHLEN) {
strcat(filename, Py_OptimizeFlag ? "o" : "c");
if (exists(filename))
return 1;
}
return 0;
}
static void
join(buffer, stuff)
char *buffer;
@ -131,7 +148,7 @@ search_for_prefix(argv0_path, landmark)
do {
n = strlen(prefix);
join(prefix, landmark);
if (exists(prefix)) {
if (ismodule(prefix)) {
prefix[n] = '\0';
return 1;
}
@ -142,6 +159,22 @@ search_for_prefix(argv0_path, landmark)
}
#ifdef MS_WIN32
#ifndef BUILD_LANDMARK
#define BUILD_LANDMARK "PC\\getpathp.c"
#endif
static int
prefixisbuilddir()
{
int n = strlen(prefix);
int ok;
join(prefix, BUILD_LANDMARK);
ok = exists(prefix);
prefix[n] = '\0';
return ok;
}
#include "malloc.h" // for alloca - see comments below!
extern const char *PyWin_DLLVersionString; // a string loaded from the DLL at startup.
@ -309,18 +342,10 @@ calculate_path()
int bufsz;
char *pythonhome = Py_GetPythonHome();
char *envpath = getenv("PYTHONPATH");
#ifdef MS_WIN32
char *machinepath, *userpath;
/* Are we running under Windows 3.1(1) Win32s? */
if (PyWin_IsWin32s()) {
/* Only CLASSES_ROOT is supported */
machinepath = getpythonregpath(HKEY_CLASSES_ROOT, TRUE);
userpath = NULL;
} else {
machinepath = getpythonregpath(HKEY_LOCAL_MACHINE, FALSE);
userpath = getpythonregpath(HKEY_CURRENT_USER, FALSE);
}
#ifdef MS_WIN32
char *machinepath = NULL;
char *userpath = NULL;
#endif
get_progpath();
@ -329,19 +354,8 @@ calculate_path()
if (pythonhome == NULL || *pythonhome == '\0') {
if (search_for_prefix(argv0_path, LANDMARK))
pythonhome = prefix;
else {
/* Couldnt find a source version - lets see if a compiled version exists. */
char LANDMARK_Look[MAX_PATH+1];
strcpy(LANDMARK_Look, LANDMARK);
/* Turn it into ".pyc" or ".pyc" depending on the current mode. */
strcat(LANDMARK_Look, Py_OptimizeFlag ? "o": "c");
/* And search again */
if (search_for_prefix(argv0_path, LANDMARK_Look))
pythonhome = prefix;
else
/* Give up in disgust - just use the default! */
pythonhome = NULL;
}
else
pythonhome = NULL;
}
else
strcpy(prefix, pythonhome);
@ -349,14 +363,30 @@ calculate_path()
if (envpath && *envpath == '\0')
envpath = NULL;
/* We need to construct a path from the following parts:
#ifdef MS_WIN32
if (!prefixisbuilddir()) {
/* Are we running under Windows 3.1(1) Win32s? */
if (PyWin_IsWin32s()) {
/* Only CLASSES_ROOT is supported */
machinepath = getpythonregpath(HKEY_CLASSES_ROOT, TRUE);
userpath = NULL;
} else {
machinepath = getpythonregpath(HKEY_LOCAL_MACHINE, FALSE);
userpath = getpythonregpath(HKEY_CURRENT_USER, FALSE);
}
}
#endif
/* We need to construct a path from the following parts.
(1) the PYTHONPATH environment variable, if set;
(2) for Win32, the machinepath and userpath, if set;
The following only if neither machinepath nor userpath is set:
(3) the PYTHONPATH config macro, with the leading "."
of each component replaced with pythonhome, if set;
(4) the directory containing the executable (argv0_path).
The length calculation calculates #3 first.
Extra rules:
- If PYTHONHOME is set (in any way) item (2) is ignored.
- If registry values are used, (3) and (4) are ignored.
*/
/* Calculate size of return buffer */