/*
+ * Copyright 2011 The Chromium Authors, All Rights Reserved.
* Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
*
+ * util_is_printable_string contributed by
+ * Pantelis Antoniou <pantelis.antoniou AT gmail.com>
+ *
* 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 of the
* USA
*/
+#include <ctype.h>
#include <stdio.h>
#include <stdlib.h>
#include <stdarg.h>
#include <string.h>
+#include <assert.h>
+
+#include <errno.h>
+#include <fcntl.h>
+#include <unistd.h>
+#include "libfdt.h"
#include "util.h"
char *xstrdup(const char *s)
memcpy(str+lenp, name, lenn+1);
return str;
}
+
+int util_is_printable_string(const void *data, int len)
+{
+ const char *s = data;
+ const char *ss;
+
+ /* zero length is not */
+ if (len == 0)
+ return 0;
+
+ /* must terminate with zero */
+ if (s[len - 1] != '\0')
+ return 0;
+
+ ss = s;
+ while (*s && isprint(*s))
+ s++;
+
+ /* not zero, or not done yet */
+ if (*s != '\0' || (s + 1 - ss) < len)
+ return 0;
+
+ return 1;
+}
+
+/*
+ * Parse a octal encoded character starting at index i in string s. The
+ * resulting character will be returned and the index i will be updated to
+ * point at the character directly after the end of the encoding, this may be
+ * the '\0' terminator of the string.
+ */
+static char get_oct_char(const char *s, int *i)
+{
+ char x[4];
+ char *endx;
+ long val;
+
+ x[3] = '\0';
+ strncpy(x, s + *i, 3);
+
+ val = strtol(x, &endx, 8);
+
+ assert(endx > x);
+
+ (*i) += endx - x;
+ return val;
+}
+
+/*
+ * Parse a hexadecimal encoded character starting at index i in string s. The
+ * resulting character will be returned and the index i will be updated to
+ * point at the character directly after the end of the encoding, this may be
+ * the '\0' terminator of the string.
+ */
+static char get_hex_char(const char *s, int *i)
+{
+ char x[3];
+ char *endx;
+ long val;
+
+ x[2] = '\0';
+ strncpy(x, s + *i, 2);
+
+ val = strtol(x, &endx, 16);
+ if (!(endx > x))
+ die("\\x used with no following hex digits\n");
+
+ (*i) += endx - x;
+ return val;
+}
+
+char get_escape_char(const char *s, int *i)
+{
+ char c = s[*i];
+ int j = *i + 1;
+ char val;
+
+ assert(c);
+ switch (c) {
+ case 'a':
+ val = '\a';
+ break;
+ case 'b':
+ val = '\b';
+ break;
+ case 't':
+ val = '\t';
+ break;
+ case 'n':
+ val = '\n';
+ break;
+ case 'v':
+ val = '\v';
+ break;
+ case 'f':
+ val = '\f';
+ break;
+ case 'r':
+ val = '\r';
+ break;
+ case '0':
+ case '1':
+ case '2':
+ case '3':
+ case '4':
+ case '5':
+ case '6':
+ case '7':
+ j--; /* need to re-read the first digit as
+ * part of the octal value */
+ val = get_oct_char(s, &j);
+ break;
+ case 'x':
+ val = get_hex_char(s, &j);
+ break;
+ default:
+ val = c;
+ }
+
+ (*i) = j;
+ return val;
+}
+
+int utilfdt_read_err(const char *filename, char **buffp)
+{
+ int fd = 0; /* assume stdin */
+ char *buf = NULL;
+ off_t bufsize = 1024, offset = 0;
+ int ret = 0;
+
+ *buffp = NULL;
+ if (strcmp(filename, "-") != 0) {
+ fd = open(filename, O_RDONLY);
+ if (fd < 0)
+ return errno;
+ }
+
+ /* Loop until we have read everything */
+ buf = malloc(bufsize);
+ do {
+ /* Expand the buffer to hold the next chunk */
+ if (offset == bufsize) {
+ bufsize *= 2;
+ buf = realloc(buf, bufsize);
+ if (!buf) {
+ ret = ENOMEM;
+ break;
+ }
+ }
+
+ ret = read(fd, &buf[offset], bufsize - offset);
+ if (ret < 0) {
+ ret = errno;
+ break;
+ }
+ offset += ret;
+ } while (ret != 0);
+
+ /* Clean up, including closing stdin; return errno on error */
+ close(fd);
+ if (ret)
+ free(buf);
+ else
+ *buffp = buf;
+ return ret;
+}
+
+char *utilfdt_read(const char *filename)
+{
+ char *buff;
+ int ret = utilfdt_read_err(filename, &buff);
+
+ if (ret) {
+ fprintf(stderr, "Couldn't open blob from '%s': %s\n", filename,
+ strerror(ret));
+ return NULL;
+ }
+ /* Successful read */
+ return buff;
+}
+
+int utilfdt_write_err(const char *filename, const void *blob)
+{
+ int fd = 1; /* assume stdout */
+ int totalsize;
+ int offset;
+ int ret = 0;
+ const char *ptr = blob;
+
+ if (strcmp(filename, "-") != 0) {
+ fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
+ if (fd < 0)
+ return errno;
+ }
+
+ totalsize = fdt_totalsize(blob);
+ offset = 0;
+
+ while (offset < totalsize) {
+ ret = write(fd, ptr + offset, totalsize - offset);
+ if (ret < 0) {
+ ret = -errno;
+ break;
+ }
+ offset += ret;
+ }
+ /* Close the file/stdin; return errno on error */
+ if (fd != 1)
+ close(fd);
+ return ret < 0 ? -ret : 0;
+}
+
+
+int utilfdt_write(const char *filename, const void *blob)
+{
+ int ret = utilfdt_write_err(filename, blob);
+
+ if (ret) {
+ fprintf(stderr, "Couldn't write blob to '%s': %s\n", filename,
+ strerror(ret));
+ }
+ return ret ? -1 : 0;
+}
+
+int utilfdt_decode_type(const char *fmt, int *type, int *size)
+{
+ int qualifier = 0;
+
+ if (!*fmt)
+ return -1;
+
+ /* get the conversion qualifier */
+ *size = -1;
+ if (strchr("hlLb", *fmt)) {
+ qualifier = *fmt++;
+ if (qualifier == *fmt) {
+ switch (*fmt++) {
+/* TODO: case 'l': qualifier = 'L'; break;*/
+ case 'h':
+ qualifier = 'b';
+ break;
+ }
+ }
+ }
+
+ /* we should now have a type */
+ if ((*fmt == '\0') || !strchr("iuxs", *fmt))
+ return -1;
+
+ /* convert qualifier (bhL) to byte size */
+ if (*fmt != 's')
+ *size = qualifier == 'b' ? 1 :
+ qualifier == 'h' ? 2 :
+ qualifier == 'l' ? 4 : -1;
+ *type = *fmt++;
+
+ /* that should be it! */
+ if (*fmt)
+ return -1;
+ return 0;
+}
projects / karo-tx-linux.git / blobdiff