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Diffstat (limited to 'libtecla-1.4.1/direader.c')
-rw-r--r--libtecla-1.4.1/direader.c299
1 files changed, 0 insertions, 299 deletions
diff --git a/libtecla-1.4.1/direader.c b/libtecla-1.4.1/direader.c
deleted file mode 100644
index 8a81fbf..0000000
--- a/libtecla-1.4.1/direader.c
+++ /dev/null
@@ -1,299 +0,0 @@
-/*
- * Copyright (c) 2000, 2001 by Martin C. Shepherd.
- *
- * All rights reserved.
- *
- * Permission is hereby granted, free of charge, to any person obtaining a
- * copy of this software and associated documentation files (the
- * "Software"), to deal in the Software without restriction, including
- * without limitation the rights to use, copy, modify, merge, publish,
- * distribute, and/or sell copies of the Software, and to permit persons
- * to whom the Software is furnished to do so, provided that the above
- * copyright notice(s) and this permission notice appear in all copies of
- * the Software and that both the above copyright notice(s) and this
- * permission notice appear in supporting documentation.
- *
- * THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND, EXPRESS
- * OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
- * MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND NONINFRINGEMENT
- * OF THIRD PARTY RIGHTS. IN NO EVENT SHALL THE COPYRIGHT HOLDER OR
- * HOLDERS INCLUDED IN THIS NOTICE BE LIABLE FOR ANY CLAIM, OR ANY SPECIAL
- * INDIRECT OR CONSEQUENTIAL DAMAGES, OR ANY DAMAGES WHATSOEVER RESULTING
- * FROM LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT,
- * NEGLIGENCE OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION
- * WITH THE USE OR PERFORMANCE OF THIS SOFTWARE.
- *
- * Except as contained in this notice, the name of a copyright holder
- * shall not be used in advertising or otherwise to promote the sale, use
- * or other dealings in this Software without prior written authorization
- * of the copyright holder.
- */
-
-/*
- * Standard includes.
- */
-#include <stdio.h>
-#include <stdlib.h>
-#include <string.h>
-#include <errno.h>
-
-/*
- * Operating system includes.
- */
-#include <unistd.h>
-#include <sys/types.h>
-#include <sys/stat.h>
-#include <dirent.h>
-
-#include "direader.h"
-
-/*
- * Use the reentrant POSIX threads version of readdir()?
- */
-#if defined(_POSIX_C_SOURCE) && _POSIX_C_SOURCE >= 199506L
-#define USE_READDIR_R 1
-#endif
-
-/*
- * Set the max length of the error-reporting string. There is no point
- * in this being longer than the width of a typical terminal window.
- * In composing error messages, I have assumed that this number is
- * at least 80, so you don't decrease it below this number.
- */
-#define ERRLEN 200
-
-/*
- * Objects of the following type are used to maintain the resources
- * needed to read directories.
- */
-struct DirReader {
- DIR *dir; /* The directory stream (if open, NULL otherwise) */
- struct dirent *file; /* The latest directory entry */
- char errmsg[ERRLEN+1]; /* Error-report buffer */
-#ifdef USE_READDIR_R
- struct dirent *buffer; /* A buffer used by the threaded version of readdir */
- int buffer_dim; /* The allocated size of buffer[] */
-#endif
-};
-
-static int _dr_path_is_dir(const char *pathname);
-
-/*.......................................................................
- * Create a new DirReader object.
- *
- * Output:
- * return DirReader * The new object, or NULL on error.
- */
-DirReader *_new_DirReader(void)
-{
- DirReader *dr; /* The object to be returned */
-/*
- * Allocate the container.
- */
- dr = (DirReader *) malloc(sizeof(DirReader));
- if(!dr) {
- fprintf(stderr, "_new_DirReader: Insufficient memory.\n");
- return NULL;
- };
-/*
- * Before attempting any operation that might fail, initialize the
- * container at least up to the point at which it can safely be passed
- * to _del_DirReader().
- */
- dr->dir = NULL;
- dr->file = NULL;
- dr->errmsg[0] = '\0';
-#ifdef USE_READDIR_R
- dr->buffer = NULL;
- dr->buffer_dim = 0;
-#endif
- return dr;
-}
-
-/*.......................................................................
- * Delete a DirReader object.
- *
- * Input:
- * dr DirReader * The object to be deleted.
- * Output:
- * return DirReader * The deleted object (always NULL).
- */
-DirReader *_del_DirReader(DirReader *dr)
-{
- if(dr) {
- _dr_close_dir(dr);
-#ifdef USE_READDIR_R
- free(dr->buffer);
-#endif
- free(dr);
- };
- return NULL;
-}
-
-/*.......................................................................
- * Open a new directory.
- *
- * Input:
- * dr DirReader * The directory reader resource object.
- * path const char * The directory to be opened.
- * Input/Output:
- * errmsg char ** If an error occurs and errmsg isn't NULL, a
- * pointer to an error description will be assigned
- * to *errmsg.
- * Output:
- * return int 0 - OK.
- * 1 - Error (see *errmsg for a description).
- */
-int _dr_open_dir(DirReader *dr, const char *path, char **errmsg)
-{
- DIR *dir = NULL; /* The directory stream */
-/*
- * If a directory is already open, close it first.
- */
- (void) _dr_close_dir(dr);
-/*
- * Is the path a directory?
- */
- if(!_dr_path_is_dir(path)) {
- if(errmsg) {
- const char *fmt = "Can't open directory: %.*s\n";
- sprintf(dr->errmsg, fmt, ERRLEN - strlen(fmt), path);
- *errmsg = dr->errmsg;
- };
- return 1;
- };
-/*
- * Attempt to open the directory.
- */
- dir = opendir(path);
- if(!dir) {
- if(errmsg) {
- const char *fmt = "Can't open directory: %.*s\n";
- sprintf(dr->errmsg, fmt, ERRLEN - strlen(fmt), path);
- *errmsg = dr->errmsg;
- };
- return 1;
- };
-/*
- * If using POSIX threads, allocate a buffer for readdir_r().
- */
-#ifdef USE_READDIR_R
- {
- size_t size;
- int name_max = pathconf(path, _PC_NAME_MAX);
-#ifdef NAME_MAX
- if(name_max < 0)
- name_max = NAME_MAX;
-#endif
- if(name_max < 0) {
- if(errmsg) {
- strcpy(dr->errmsg, "Unable to deduce readdir() buffer size.");
- *errmsg = dr->errmsg;
- };
- closedir(dir);
- return 1;
- };
-/*
- * How big a buffer do we need to allocate?
- */
- size = sizeof(struct dirent) + name_max;
-/*
- * Extend the buffer?
- */
- if(size > dr->buffer_dim || !dr->buffer) {
- struct dirent *buffer = (struct dirent *) (dr->buffer ?
- realloc(dr->buffer, size) :
- malloc(size));
- if(!buffer) {
- if(errmsg) {
- strcpy(dr->errmsg, "Insufficient memory for readdir() buffer.");
- *errmsg = dr->errmsg;
- };
- closedir(dir);
- return 1;
- };
- dr->buffer = buffer;
- dr->buffer_dim = size;
- };
- };
-#endif
-/*
- * Record the successfully opened directory.
- */
- dr->dir = dir;
- return 0;
-}
-
-/*.......................................................................
- * If the DirReader object is currently contains an open directory,
- * close it.
- *
- * Input:
- * dr DirReader * The directory reader resource object.
- */
-void _dr_close_dir(DirReader *dr)
-{
- if(dr && dr->dir) {
- closedir(dr->dir);
- dr->dir = NULL;
- dr->file = NULL;
- dr->errmsg[0] = '\0';
- };
-}
-
-/*.......................................................................
- * Read the next file from the directory opened with _dr_open_dir().
- *
- * Input:
- * dr DirReader * The directory reader resource object.
- * Output:
- * return char * The name of the new file, or NULL if we reached
- * the end of the directory.
- */
-char *_dr_next_file(DirReader *dr)
-{
-/*
- * Are we currently reading a directory?
- */
- if(dr->dir) {
-/*
- * Read the next directory entry.
- */
-#ifdef USE_READDIR_R
- if(readdir_r(dr->dir, dr->buffer, &dr->file) == 0 && dr->file)
- return dr->file->d_name;
-#else
- dr->file = readdir(dr->dir);
- if(dr->file)
- return dr->file->d_name;
-#endif
- };
-/*
- * When the end of a directory is reached, close it.
- */
- _dr_close_dir(dr);
- return NULL;
-}
-
-/*.......................................................................
- * Return 1 if the specified pathname refers to a directory.
- *
- * Input:
- * pathname const char * The path to test.
- * Output:
- * return int 0 - Not a directory.
- * 1 - pathname[] refers to a directory.
- */
-static int _dr_path_is_dir(const char *pathname)
-{
- struct stat statbuf; /* The file-statistics return buffer */
-/*
- * Look up the file attributes.
- */
- if(stat(pathname, &statbuf) < 0)
- return 0;
-/*
- * Is the file a directory?
- */
- return S_ISDIR(statbuf.st_mode) != 0;
-}
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