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* Copyright 2011 The Chromium Authors, All Rights Reserved.
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* Copyright 2008 Jon Loeliger, Freescale Semiconductor, Inc.
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* util_is_printable_string contributed by
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* Pantelis Antoniou <pantelis.antoniou AT gmail.com>
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* This program is free software; you can redistribute it and/or
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* modify it under the terms of the GNU General Public License as
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* published by the Free Software Foundation; either version 2 of the
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* License, or (at your option) any later version.
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* This program is distributed in the hope that it will be useful,
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* but WITHOUT ANY WARRANTY; without even the implied warranty of
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* MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the GNU
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* General Public License for more details.
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* You should have received a copy of the GNU General Public License
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* along with this program; if not, write to the Free Software
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* Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307
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#include "version_gen.h"
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char *xstrdup(const char *s)
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int len = strlen(s) + 1;
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char *d = xmalloc(len);
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/* based in part from (3) vsnprintf */
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int xasprintf(char **strp, const char *fmt, ...)
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int n, size = 128; /* start with 128 bytes */
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/* initial pointer is NULL making the fist realloc to be malloc */
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p = xrealloc(p, size);
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/* Try to print in the allocated space. */
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n = vsnprintf(p, size, fmt, ap);
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/* If that worked, return the string. */
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if (n > -1 && n < size)
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/* Else try again with more space. */
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if (n > -1) /* glibc 2.1 */
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size = n + 1; /* precisely what is needed */
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size *= 2; /* twice the old size */
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char *join_path(const char *path, const char *name)
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int lenp = strlen(path);
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int lenn = strlen(name);
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len = lenp + lenn + 2;
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if ((lenp > 0) && (path[lenp-1] == '/')) {
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memcpy(str, path, lenp);
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memcpy(str+lenp, name, lenn+1);
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bool util_is_printable_string(const void *data, int len)
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const char *s = data;
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/* zero length is not */
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/* must terminate with zero */
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if (s[len - 1] != '\0')
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while (s < se && *s && isprint((unsigned char)*s))
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/* not zero, or not done yet */
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if (*s != '\0' || s == ss)
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* Parse a octal encoded character starting at index i in string s. The
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* resulting character will be returned and the index i will be updated to
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* point at the character directly after the end of the encoding, this may be
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* the '\0' terminator of the string.
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static char get_oct_char(const char *s, int *i)
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strncpy(x, s + *i, 3);
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val = strtol(x, &endx, 8);
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* Parse a hexadecimal encoded character starting at index i in string s. The
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* resulting character will be returned and the index i will be updated to
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* point at the character directly after the end of the encoding, this may be
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* the '\0' terminator of the string.
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static char get_hex_char(const char *s, int *i)
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strncpy(x, s + *i, 2);
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val = strtol(x, &endx, 16);
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die("\\x used with no following hex digits\n");
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char get_escape_char(const char *s, int *i)
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j--; /* need to re-read the first digit as
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* part of the octal value */
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val = get_oct_char(s, &j);
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val = get_hex_char(s, &j);
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int utilfdt_read_err_len(const char *filename, char **buffp, off_t *len)
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int fd = 0; /* assume stdin */
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off_t bufsize = 1024, offset = 0;
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if (strcmp(filename, "-") != 0) {
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fd = open(filename, O_RDONLY);
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/* Loop until we have read everything */
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buf = xmalloc(bufsize);
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/* Expand the buffer to hold the next chunk */
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if (offset == bufsize) {
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buf = xrealloc(buf, bufsize);
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ret = read(fd, &buf[offset], bufsize - offset);
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/* Clean up, including closing stdin; return errno on error */
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int utilfdt_read_err(const char *filename, char **buffp)
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return utilfdt_read_err_len(filename, buffp, &len);
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char *utilfdt_read_len(const char *filename, off_t *len)
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int ret = utilfdt_read_err_len(filename, &buff, len);
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fprintf(stderr, "Couldn't open blob from '%s': %s\n", filename,
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/* Successful read */
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char *utilfdt_read(const char *filename)
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return utilfdt_read_len(filename, &len);
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int utilfdt_write_err(const char *filename, const void *blob)
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int fd = 1; /* assume stdout */
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const char *ptr = blob;
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if (strcmp(filename, "-") != 0) {
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fd = open(filename, O_WRONLY | O_CREAT | O_TRUNC, 0666);
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totalsize = fdt_totalsize(blob);
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while (offset < totalsize) {
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ret = write(fd, ptr + offset, totalsize - offset);
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/* Close the file/stdin; return errno on error */
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return ret < 0 ? -ret : 0;
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int utilfdt_write(const char *filename, const void *blob)
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int ret = utilfdt_write_err(filename, blob);
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fprintf(stderr, "Couldn't write blob to '%s': %s\n", filename,
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int utilfdt_decode_type(const char *fmt, int *type, int *size)
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/* get the conversion qualifier */
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if (strchr("hlLb", *fmt)) {
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if (qualifier == *fmt) {
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/* TODO: case 'l': qualifier = 'L'; break;*/
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/* we should now have a type */
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if ((*fmt == '\0') || !strchr("iuxs", *fmt))
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/* convert qualifier (bhL) to byte size */
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*size = qualifier == 'b' ? 1 :
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qualifier == 'h' ? 2 :
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qualifier == 'l' ? 4 : -1;
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/* that should be it! */
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void utilfdt_print_data(const char *data, int len)
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/* no data, don't print */
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if (util_is_printable_string(data, len)) {
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} while (s < data + len);
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} else if ((len % 4) == 0) {
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const fdt32_t *cell = (const fdt32_t *)data;
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for (i = 0, len /= 4; i < len; i++)
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printf("0x%08x%s", fdt32_to_cpu(cell[i]),
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i < (len - 1) ? " " : "");
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const unsigned char *p = (const unsigned char *)data;
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for (i = 0; i < len; i++)
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printf("%02x%s", *p++, i < len - 1 ? " " : "");
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void NORETURN util_version(void)
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printf("Version: %s\n", DTC_VERSION);
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void NORETURN util_usage(const char *errmsg, const char *synopsis,
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const char *short_opts,
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struct option const long_opts[],
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const char * const opts_help[])
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FILE *fp = errmsg ? stderr : stdout;
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const char a_arg[] = "<arg>";
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size_t a_arg_len = strlen(a_arg) + 1;
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"Options: -[%s]\n", synopsis, short_opts);
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/* prescan the --long opt length to auto-align */
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for (i = 0; long_opts[i].name; ++i) {
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/* +1 is for space between --opt and help text */
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int l = strlen(long_opts[i].name) + 1;
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if (long_opts[i].has_arg == a_argument)
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for (i = 0; long_opts[i].name; ++i) {
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/* helps when adding new applets or options */
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assert(opts_help[i] != NULL);
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/* first output the short flag if it has one */
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if (long_opts[i].val > '~')
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fprintf(fp, " -%c, ", long_opts[i].val);
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/* then the long flag */
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if (long_opts[i].has_arg == no_argument)
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fprintf(fp, "--%-*s", optlen, long_opts[i].name);
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fprintf(fp, "--%s %s%*s", long_opts[i].name, a_arg,
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(int)(optlen - strlen(long_opts[i].name) - a_arg_len), "");
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/* finally the help text */
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fprintf(fp, "%s\n", opts_help[i]);
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fprintf(fp, "\nError: %s\n", errmsg);