Revision: 75884
http://sourceforge.net/p/brlcad/code/75884
Author: starseeker
Date: 2020-05-21 19:37:16 +0000 (Thu, 21 May 2020)
Log Message:
-----------
Set up the libbu fallback as something that can be called if the other
mechanisms fail, not just as a compile-time fallback if system methods aren't
available.
Modified Paths:
--------------
brlcad/trunk/src/libbu/whereami.c
Modified: brlcad/trunk/src/libbu/whereami.c
===================================================================
--- brlcad/trunk/src/libbu/whereami.c 2020-05-21 19:05:08 UTC (rev 75883)
+++ brlcad/trunk/src/libbu/whereami.c 2020-05-21 19:37:16 UTC (rev 75884)
@@ -89,6 +89,54 @@
#error unsupported compiler
#endif
+/* LIBBU fallback implementation */
+static
+int _bu_getExecutablePath(char* out, int capacity, int* dirname_length)
+{
+ const char *pname = _bu_progname_raw();
+ struct bu_vls epath = BU_VLS_INIT_ZERO;
+
+ if (pname[0] == '.') {
+ char iwd[MAXPATHLEN];
+ char fullpath[MAXPATHLEN];
+ bu_getiwd(iwd, MAXPATHLEN);
+ // Use a VLS for this, since in principle there's nothing stopping the
+ // iwd and the bu_progname each individually from running right up to
+ // MAXPATHLEN, and if they do a MAXPATHLEN buffer won't hold both of
+ // them for realpath to try and digest down into something sane.
+ bu_vls_sprintf(&epath, "%s%c%s", iwd, BU_DIR_SEPARATOR, pname);
+ if (!bu_file_realpath(bu_vls_cstr(&epath), fullpath)) {
+ /* Unable to resolve initial path concatentation */
+ bu_vls_free(&epath);
+ return -1;
+ }
+ bu_vls_sprintf(&epath, "%s", fullpath);
+ } else {
+ bu_vls_sprintf(&epath, "%s", pname);
+ }
+
+ int length = bu_vls_strlen(&epath);
+ if (length <= capacity) {
+
+ memcpy(out, bu_vls_cstr(&epath), length);
+
+ if (dirname_length) {
+ int i;
+ for (i = length - 1; i >= 0; --i) {
+ if (out[i] == '/') {
+ *dirname_length = i;
+ break;
+ }
+ }
+ }
+ }
+
+ bu_vls_free(&epath);
+
+ return length;
+}
+
+
#if defined(_WIN32)
#define WIN32_LEAN_AND_MEAN
@@ -260,6 +308,10 @@
break;
}
+ if (length <= 0) {
+ return _bu_getExecutablePath(out, capacity, dirname_length);
+ }
+
return length;
}
@@ -452,6 +504,10 @@
if (path != buffer1)
WAI_FREE(path);
+ if (length <= 0) {
+ return _bu_getExecutablePath(out, capacity, dirname_length);
+ }
+
return length;
}
@@ -558,6 +614,10 @@
fclose(self_exe);
+ if (length <= 0) {
+ return _bu_getExecutablePath(out, capacity, dirname_length);
+ }
+
return length;
}
@@ -666,6 +726,10 @@
if (path != buffer1)
WAI_FREE(path);
+ if (length <= 0) {
+ return _bu_getExecutablePath(out, capacity, dirname_length);
+ }
+
return length;
}
@@ -719,47 +783,7 @@
WAI_FUNCSPEC
int WAI_PREFIX(getExecutablePath)(char* out, int capacity, int* dirname_length)
{
- const char *pname = _bu_progname_raw();
- struct bu_vls epath = BU_VLS_INIT_ZERO;
-
- if (pname[0] == '.') {
- char iwd[MAXPATHLEN];
- char fullpath[MAXPATHLEN];
- bu_getiwd(iwd, MAXPATHLEN);
- // Use a VLS for this, since in principle there's nothing stopping the
- // iwd and the bu_progname each individually from running right up to
- // MAXPATHLEN, and if they do a MAXPATHLEN buffer won't hold both of
- // them for realpath to try and digest down into something sane.
- bu_vls_sprintf(&epath, "%s%c%s", iwd, BU_DIR_SEPARATOR, pname);
- if (!bu_file_realpath(bu_vls_cstr(&epath), fullpath)) {
- /* Unable to resolve initial path concatentation */
- bu_vls_free(&epath);
- return -1;
- }
- bu_vls_sprintf(&epath, "%s", fullpath);
- } else {
- bu_vls_sprintf(&epath, "%s", pname);
- }
-
- int length = bu_vls_strlen(&epath);
- if (length <= capacity) {
-
- memcpy(out, bu_vls_cstr(&epath), length);
-
- if (dirname_length) {
- int i;
- for (i = length - 1; i >= 0; --i) {
- if (out[i] == '/') {
- *dirname_length = i;
- break;
- }
- }
- }
- }
-
- bu_vls_free(&epath);
-
- return length;
+ return _bu_getExecutablePath(out, capacity, dirname_length);
}
WAI_NOINLINE WAI_FUNCSPEC
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