160 строки
4.3 KiB
C
160 строки
4.3 KiB
C
/*
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* Copyright (c) 2004-2005 The Trustees of Indiana University and Indiana
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* University Research and Technology
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* Corporation. All rights reserved.
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* Copyright (c) 2004-2005 The University of Tennessee and The University
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* of Tennessee Research Foundation. All rights
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* reserved.
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* Copyright (c) 2004-2005 High Performance Computing Center Stuttgart,
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* University of Stuttgart. All rights reserved.
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* Copyright (c) 2004-2005 The Regents of the University of California.
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* All rights reserved.
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* $COPYRIGHT$
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*
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* Additional copyrights may follow
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*
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* $HEADER$
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*/
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#include "opal_config.h"
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#include <stdlib.h>
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#include <string.h>
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#if HAVE_DIRNAME
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#include <libgen.h>
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#endif /* HAVE_DIRNAME */
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#include "opal/util/basename.h"
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#include "opal/util/os_path.h"
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#include "opal/constants.h"
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/**
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* Return a pointer into the original string where the last PATH delimiter
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* was found. It does not modify the original string. Moreover, it does not
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* scan the full string, but only the part allowed by the specified number
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* of characters.
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* If the last character on the string is a path separator, it will be skipped.
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*/
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static inline char* opal_find_last_path_separator( const char* filename, size_t n )
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{
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char* p = (char*)filename + n;
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/* First skip the latest separators */
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for( ; p != filename; p-- ) {
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#if defined(__WINDOWS__)
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if( (*p != '\\') && (*p != '/') )
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break;
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#else
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if( *p != OPAL_PATH_SEP[0] )
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break;
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#endif /* defined(__WINDOWS__) */
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}
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for( ; p != filename; p-- ) {
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#if defined(__WINDOWS__)
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if( (*p == '\\') || (*p == '/') )
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return p;
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#else
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if( *p == OPAL_PATH_SEP[0] )
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return p;
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#endif /* defined(__WINDOWS__) */
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}
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return NULL; /* nothing found inside the filename */
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}
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char *opal_basename(const char *filename)
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{
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size_t i;
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char *tmp, *ret = NULL;
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const char sep = OPAL_PATH_SEP[0];
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/* Check for the bozo case */
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if (NULL == filename) {
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return NULL;
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}
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/* On Windows, automatically exclude a drive designator */
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#ifdef __WINDOWS__
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if (strlen(filename) == 2 &&
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isalpha(filename[0]) && ':' == filename[1]) {
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return strdup(filename);
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} else if (strlen(filename) == 3 &&
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isalpha(filename[0]) && ':' == filename[1] && sep == filename[2]) {
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return strdup(filename);
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}
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if (':' == filename[1] && isalpha(filename[0])) {
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filename += 2;
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if (sep == filename[0]) {
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++filename;
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}
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}
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#endif
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/* Check for the bozo cases */
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if (0 == strlen(filename)) {
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return strdup("");
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}
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if (sep == filename[0] && '\0' == filename[1]) {
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return strdup(filename);
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}
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/* Remove trailing sep's (note that we already know that strlen > 0) */
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tmp = strdup(filename);
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for (i = strlen(tmp) - 1; i > 0; --i) {
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if (sep == tmp[i]) {
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tmp[i] = '\0';
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} else {
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break;
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}
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}
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if (0 == i) {
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tmp[0] = sep;
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return tmp;
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}
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/* Look for the final sep */
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ret = strrchr(tmp, sep);
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if (NULL == ret) {
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return tmp;
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}
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ret = strdup(ret + 1);
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free(tmp);
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return opal_make_filename_os_friendly(ret);
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}
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char* opal_dirname(const char* filename)
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{
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#if defined(HAVE_DIRNAME)
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return dirname(filename);
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#else
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const char* p = opal_find_last_path_separator(filename, strlen(filename));
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for( ; p != filename; p-- ) {
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if( (*p == '\\') || (*p == '/') ) {
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/* If there are several delimiters remove them all */
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for( --p; p != filename; p-- ) {
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if( (*p != '\\') && (*p != '/') ) {
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p++;
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break;
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}
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}
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if( p != filename ) {
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char* ret = (char*)malloc( p - filename + 1 );
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strncpy_s( ret, (p - filename + 1), filename, p - filename );
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ret[p - filename] = '\0';
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return opal_make_filename_os_friendly(ret);
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}
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break; /* return the duplicate of "." */
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}
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}
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return _strdup(".");
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#endif /* defined(HAVE_DIRNAME) */
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}
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