--- /dev/null
+/* read-file.c -- read file contents into a string
+ Copyright (C) 2006 Free Software Foundation, Inc.
+ Written by Simon Josefsson and Bruno Haible.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "read-file.h"
+
+/* Get realloc, free. */
+#include <stdlib.h>
+
+/* Get errno. */
+#include <errno.h>
+
+/* Read a STREAM and return a newly allocated string with the content,
+ and set *LENGTH to the length of the string. The string is
+ zero-terminated, but the terminating zero byte is not counted in
+ *LENGTH. On errors, *LENGTH is undefined, errno preserves the
+ values set by system functions (if any), and NULL is returned. */
+char *
+fread_file (FILE * stream, size_t * length)
+{
+ char *buf = malloc (1);
+ size_t alloc = 1;
+ size_t size = 0;
+
+ if (!buf)
+ return NULL;
+
+ while (!feof (stream))
+ {
+ size_t count;
+
+ if (size + BUFSIZ + 1 > alloc)
+ {
+ char *new_buf;
+
+ alloc += alloc / 2;
+ if (alloc < size + BUFSIZ + 1)
+ alloc = size + BUFSIZ + 1;
+
+ new_buf = realloc (buf, alloc);
+ if (!new_buf)
+ {
+ int save_errno = errno;
+ free (buf);
+ errno = save_errno;
+ return NULL;
+ }
+
+ buf = new_buf;
+ }
+
+ count = fread (buf + size, 1, alloc - size - 1, stream);
+ size += count;
+
+ if (ferror (stream))
+ {
+ int save_errno = errno;
+ free (buf);
+ errno = save_errno;
+ return NULL;
+ }
+ }
+
+ buf[size] = '\0';
+
+ *length = size;
+
+ return buf;
+}
+
+static char *
+internal_read_file (const char *filename, size_t * length, const char *mode)
+{
+ FILE *stream = fopen (filename, mode);
+ char *out;
+ int save_errno;
+ int rc;
+
+ if (!stream)
+ return NULL;
+
+ out = fread_file (stream, length);
+
+ save_errno = errno;
+
+ if (fclose (stream) != 0)
+ {
+ if (out)
+ {
+ save_errno = errno;
+ free (out);
+ }
+ errno = save_errno;
+ return NULL;
+ }
+
+ return out;
+}
+
+/* Open and read the contents of FILENAME, and return a newly
+ allocated string with the content, and set *LENGTH to the length of
+ the string. The string is zero-terminated, but the terminating
+ zero byte is not counted in *LENGTH. On errors, *LENGTH is
+ undefined, errno preserves the values set by system functions (if
+ any), and NULL is returned. */
+char *
+read_file (const char *filename, size_t * length)
+{
+ return internal_read_file (filename, length, "r");
+}
+
+/* Open (on non-POSIX systems, in binary mode) and read the contents
+ of FILENAME, and return a newly allocated string with the content,
+ and set LENGTH to the length of the string. The string is
+ zero-terminated, but the terminating zero byte is not counted in
+ the LENGTH variable. On errors, *LENGTH is undefined, errno
+ preserves the values set by system functions (if any), and NULL is
+ returned. */
+char *
+read_binary_file (const char *filename, size_t * length)
+{
+ return internal_read_file (filename, length, "rb");
+}
--- /dev/null
+/* read-file.h -- read file contents into a string
+ Copyright (C) 2006 Free Software Foundation, Inc.
+ Written by Simon Josefsson.
+
+ This program is free software; you can redistribute it and/or modify
+ it under the terms of the GNU General Public License as published by
+ the Free Software Foundation; either version 2, or (at your option)
+ any later version.
+
+ This program is distributed in the hope that it will be useful,
+ but WITHOUT ANY WARRANTY; without even the implied warranty of
+ MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ GNU General Public License for more details.
+
+ You should have received a copy of the GNU General Public License
+ along with this program; if not, write to the Free Software Foundation,
+ Inc., 51 Franklin Street, Fifth Floor, Boston, MA 02110-1301, USA. */
+
+#ifndef READ_FILE_H
+#define READ_FILE_H
+
+/* Get size_t. */
+#include <stddef.h>
+
+/* Get FILE. */
+#include <stdio.h>
+
+extern char *fread_file (FILE * stream, size_t * length);
+
+extern char *read_file (const char *filename, size_t * length);
+
+extern char *read_binary_file (const char *filename, size_t * length);
+
+#endif /* READ_FILE_H */
--- /dev/null
+# read-file.m4 serial 1
+dnl Copyright (C) 2002, 2003, 2004, 2005, 2006 Free Software Foundation, Inc.
+dnl This file is free software; the Free Software Foundation
+dnl gives unlimited permission to copy and/or distribute it,
+dnl with or without modifications, as long as this notice is preserved.
+
+AC_DEFUN([gl_FUNC_READ_FILE],
+[
+ AC_LIBSOURCES([read-file.c, read-file.h])
+ AC_LIBOBJ([read-file])
+ gl_PREREQ_READ_FILE
+])
+
+# Prerequisites of lib/read-file.c.
+AC_DEFUN([gl_PREREQ_READ_FILE], [:])
--- /dev/null
+/*
+ * Copyright (C) 2006 Free Software Foundation
+ * Written by Simon Josefsson
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2, or (at your option)
+ * any later version.
+ *
+ * This program is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with this program; if not, write to the Free Software
+ * Foundation, Inc., 51 Franklin Street, Fifth Floor, Boston, MA
+ * 02110-1301, USA. */
+
+#ifdef HAVE_CONFIG_H
+# include <config.h>
+#endif
+
+#include "read-file.h"
+
+#include <stdio.h>
+
+#define FILE1 "/etc/resolv.conf"
+#define FILE2 "/dev/null"
+
+int
+main (void)
+{
+ {
+ size_t len;
+ char *out = read_file (FILE1, &len);
+
+ if (!out)
+ perror ("Could not read file");
+
+ if (out[len] != '\0')
+ perror ("BAD: out[len] not zero");
+
+ printf ("Read %d from %s...\n", len, FILE1);
+
+ free (out);
+ }
+
+ {
+ size_t len;
+ char *out = read_file (FILE2, &len);
+
+ if (!out)
+ perror ("Could not read file");
+
+ if (out[len] != '\0')
+ perror ("BAD: out[len] not zero");
+
+ printf ("Read %d from %s...\n", len, FILE2);
+
+ free (out);
+ }
+
+ return 0;
+}
projects / pspp / commitdiff