searchPath.c File Reference

Detailed Description

Implementation of search path management and file locating functions.

Copyright

• (c) 2002 The University of Chicago, as Operator of Argonne National Laboratory.
• (c) 2002 The Regents of the University of California, as Operator of Los Alamos National Laboratory.

License

This file is distributed under the terms of the Software License Agreement found in the file LICENSE included with this distribution.

Author

H. Shang, M. Borland, R. Soliday

Definition in file searchPath.c.

#include "mdb.h"

Go to the source code of this file.

Functions
void	setSearchPath (char *input)
	Sets the search path for file lookup.
char *	findFileInSearchPath (const char *filename)
	Finds a file within the configured search path.

Function Documentation

findFileInSearchPath()

char * findFileInSearchPath

(

const char *

filename

)

Finds a file within the configured search path.

This function searches for the specified filename in each directory listed in the search_path. If the filename includes SDDS tags (indicated by '=' and '+'), the tags are processed and appended to the found file path.

Parameters

filename

The name of the file to locate. It may include SDDS tags in the format <filename>=<x>+<y>.

Returns

A dynamically allocated string containing the path to the found file with tags, or NULL if the file is not found.

Definition at line 49 of file searchPath.c.

                                                 {
    if (!filename || !strlen(filename))
        return NULL;
 
    /* Work on a modifiable copy of filename */
    char *localFilename = strdup(filename);
    if (!localFilename)
        return NULL;
 
    char *sddsTags = NULL;
    /* Look for '=' in the copy */
    if ((sddsTags = strchr(localFilename, '='))) {
        /* Check for SDDS tag format "<filename>=<x>+<y>" */
        if (!strchr(sddsTags + 1, '+'))
            sddsTags = NULL;
        else {
            /* Split the string without modifying the original */
            *sddsTags = '\0';
            sddsTags++;
        }
    }
 
    char *result = NULL;
    if (search_path && strlen(search_path)) {
        char *pathList;
        cp_str(&pathList, search_path);
        char *path;
        while ((path = get_token(pathList))) {
            size_t needed = strlen(localFilename) + strlen(path) + 2 +
                            (sddsTags ? strlen(sddsTags) + 2 : 0);
            char *tmpName = malloc(needed);
            sprintf(tmpName, "%s/%s", path, localFilename);
            free(path);
            if (fexists(tmpName)) {
                if (sddsTags) {
                    strcat(tmpName, "=");
                    strcat(tmpName, sddsTags);
                }
                cp_str(&result, tmpName);
                free(tmpName);
                free(pathList);
                free(localFilename);
                return result;
            }
            free(tmpName);
        }
        free(pathList);
    }
    if (fexists(localFilename)) {
        cp_str(&result, localFilename);
        free(localFilename);
        return result;
    }
    free(localFilename);
    return NULL;
}

setSearchPath()

void setSearchPath

(

char *

input

)

Sets the search path for file lookup.

This function updates the global search_path variable. If a new input path is provided, it copies the input string to search_path, freeing any previously allocated memory. If the input is NULL, search_path is set to NULL.

Parameters

input

The new search path to set. If NULL, the search path is cleared.

Definition at line 28 of file searchPath.c.

                                {
  if (search_path)
    free(search_path);
  if (input)
    cp_str(&search_path, input);
  else
    search_path = NULL;
}