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authormarha <marha@users.sourceforge.net>2009-11-06 06:21:24 +0000
committermarha <marha@users.sourceforge.net>2009-11-06 06:21:24 +0000
commit0ae41e8705d1a90e05e5452759396d6ef3e9d33f (patch)
tree0633e2a8cdad0b13af31d9ff471174fe3f69e637 /libXpm/src/RdFToBuf.c
parenta606d151fb424f09f5b548ed58879dc20ba4f173 (diff)
parentc9179017c7e70703b7cac46c2df8b950506319e0 (diff)
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Added libXpm
Diffstat (limited to 'libXpm/src/RdFToBuf.c')
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1 files changed, 125 insertions, 0 deletions
diff --git a/libXpm/src/RdFToBuf.c b/libXpm/src/RdFToBuf.c
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+/*
+ * Copyright (C) 1989-95 GROUPE BULL
+ *
+ * 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, sublicense, and/or
+ * sell copies of the Software, and to permit persons to whom the Software is
+ * furnished to do so, subject to the following conditions:
+ *
+ * The above copyright notice and this permission notice shall be included in
+ * all copies or substantial portions of the Software.
+ *
+ * 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. IN NO EVENT SHALL
+ * GROUPE BULL BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN
+ * AN ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
+ * CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE SOFTWARE.
+ *
+ * Except as contained in this notice, the name of GROUPE BULL shall not be
+ * used in advertising or otherwise to promote the sale, use or other dealings
+ * in this Software without prior written authorization from GROUPE BULL.
+ */
+
+/*****************************************************************************\
+* RdFToBuf.c: *
+* *
+* XPM library *
+* Copy a file to a malloc'ed buffer, provided as a convenience. *
+* *
+* Developed by Arnaud Le Hors *
+\*****************************************************************************/
+
+/*
+ * The code related to FOR_MSW has been added by
+ * HeDu (hedu@cul-ipn.uni-kiel.de) 4/94
+ */
+
+/* October 2004, source code review by Thomas Biege <thomas@suse.de> */
+
+#ifdef HAVE_CONFIG_H
+#include <config.h>
+#endif
+#include "XpmI.h"
+#include <sys/stat.h>
+#if !defined(FOR_MSW) && !defined(WIN32)
+#include <unistd.h>
+#endif
+#ifndef VAX11C
+#include <fcntl.h>
+#endif
+#if defined(FOR_MSW) || defined(WIN32)
+#include <io.h>
+typedef long off_t;
+#define stat _stat
+#define fstat _fstat
+#define fdopen _fdopen
+#define O_RDONLY _O_RDONLY
+#endif
+
+int
+XpmReadFileToBuffer(
+ char *filename,
+ char **buffer_return)
+{
+ int fd, fcheck;
+ off_t len;
+ char *ptr;
+ struct stat stats;
+ FILE *fp;
+
+ *buffer_return = NULL;
+
+#ifndef VAX11C
+ fd = open(filename, O_RDONLY);
+#else
+ fd = open(filename, O_RDONLY, NULL);
+#endif
+ if (fd < 0)
+ return XpmOpenFailed;
+
+ if (fstat(fd, &stats)) {
+ close(fd);
+ return XpmOpenFailed;
+ }
+ fp = fdopen(fd, "r");
+ if (!fp) {
+ close(fd);
+ return XpmOpenFailed;
+ }
+ len = stats.st_size;
+ ptr = (char *) XpmMalloc(len + 1);
+ if (!ptr) {
+ fclose(fp);
+ return XpmNoMemory;
+ }
+ fcheck = fread(ptr, 1, len, fp);
+ fclose(fp);
+#ifdef VMS
+ /* VMS often stores text files in a variable-length record format,
+ where there are two bytes of size followed by the record. fread
+ converts this so it looks like a record followed by a newline.
+ Unfortunately, the size reported by fstat() (and fseek/ftell)
+ counts the two bytes for the record terminator, while fread()
+ counts only one. So, fread() sees fewer bytes in the file (size
+ minus # of records) and thus when asked to read the amount
+ returned by stat(), it fails.
+ The best solution, suggested by DEC, seems to consider the length
+ returned from fstat() as an upper bound and call fread() with
+ a record length of 1. Then don't check the return value.
+ We'll check for 0 for gross error that's all.
+ */
+ len = fcheck;
+ if (fcheck == 0) {
+#else
+ if (fcheck != len) {
+#endif
+ XpmFree(ptr);
+ return XpmOpenFailed;
+ }
+ ptr[len] = '\0';
+ *buffer_return = ptr;
+ return XpmSuccess;
+}