626 lines
14 KiB
C
626 lines
14 KiB
C
/*
|
|
* This file is part of the libpayload project.
|
|
*
|
|
* Copyright (C) 2007 Uwe Hermann <uwe@hermann-uwe.de>
|
|
* Copyright (C) 2008 Advanced Micro Devices, Inc.
|
|
* Copyright (C) 2010 coresystems GmbH
|
|
*
|
|
* Redistribution and use in source and binary forms, with or without
|
|
* modification, are permitted provided that the following conditions
|
|
* are met:
|
|
* 1. Redistributions of source code must retain the above copyright
|
|
* notice, this list of conditions and the following disclaimer.
|
|
* 2. Redistributions in binary form must reproduce the above copyright
|
|
* notice, this list of conditions and the following disclaimer in the
|
|
* documentation and/or other materials provided with the distribution.
|
|
* 3. The name of the author may not be used to endorse or promote products
|
|
* derived from this software without specific prior written permission.
|
|
*
|
|
* THIS SOFTWARE IS PROVIDED BY THE AUTHOR AND CONTRIBUTORS ``AS IS'' AND
|
|
* ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED TO, THE
|
|
* IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A PARTICULAR PURPOSE
|
|
* ARE DISCLAIMED. IN NO EVENT SHALL THE AUTHOR OR CONTRIBUTORS BE LIABLE
|
|
* FOR ANY DIRECT, INDIRECT, INCIDENTAL, SPECIAL, EXEMPLARY, OR CONSEQUENTIAL
|
|
* DAMAGES (INCLUDING, BUT NOT LIMITED TO, PROCUREMENT OF SUBSTITUTE GOODS
|
|
* OR SERVICES; LOSS OF USE, DATA, OR PROFITS; OR BUSINESS INTERRUPTION)
|
|
* HOWEVER CAUSED AND ON ANY THEORY OF LIABILITY, WHETHER IN CONTRACT, STRICT
|
|
* LIABILITY, OR TORT (INCLUDING NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY
|
|
* OUT OF THE USE OF THIS SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF
|
|
* SUCH DAMAGE.
|
|
*/
|
|
|
|
#include <libpayload.h>
|
|
#include <string.h>
|
|
#include <ctype.h>
|
|
#include <errno.h>
|
|
|
|
/**
|
|
* Calculate the length of a fixed-size string.
|
|
*
|
|
* @param str The input string.
|
|
* @param maxlen Return at most maxlen characters as length of the string.
|
|
* @return The length of the string, not including the final NUL character.
|
|
* The maximum length returned is maxlen.
|
|
*/
|
|
size_t strnlen(const char *str, size_t maxlen)
|
|
{
|
|
size_t len = 0;
|
|
|
|
/* NULL and empty strings have length 0. */
|
|
if (!str)
|
|
return 0;
|
|
|
|
/* Loop until we find a NUL character, or maxlen is reached. */
|
|
while ((*str++ != '\0') && (len < maxlen))
|
|
len++;
|
|
|
|
return len;
|
|
}
|
|
|
|
/**
|
|
* Calculate the length of a string.
|
|
*
|
|
* @param str The input string.
|
|
* @return The length of the string, not including the final NUL character.
|
|
*/
|
|
size_t strlen(const char *str)
|
|
{
|
|
size_t len = 0;
|
|
|
|
/* NULL and empty strings have length 0. */
|
|
if (!str)
|
|
return 0;
|
|
|
|
/* Loop until we find a NUL character. */
|
|
while (*str++ != '\0')
|
|
len++;
|
|
|
|
return len;
|
|
}
|
|
|
|
/**
|
|
* Compare two strings.
|
|
*
|
|
* @param s1 The first string.
|
|
* @param s2 The second string.
|
|
* @return Returns a value less than zero, if s1 is shorter than s2. Returns
|
|
* zero, if s1 equals s2. Returns a value greater than zero, if
|
|
* s1 is longer than s2.
|
|
*/
|
|
int strcasecmp(const char *s1, const char *s2)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; 1; i++) {
|
|
if (tolower(s1[i]) != tolower(s2[i]))
|
|
return s1[i] - s2[i];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Compare two strings with fixed length.
|
|
*
|
|
* @param s1 The first string.
|
|
* @param s2 The second string.
|
|
* @param maxlen Return at most maxlen characters as length of the string.
|
|
* @return A non-zero value if s1 and s2 differ, or zero if s1 equals s2.
|
|
*/
|
|
int strncasecmp(const char *s1, const char *s2, size_t maxlen)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < maxlen; i++) {
|
|
if (tolower(s1[i]) != tolower(s2[i]))
|
|
return s1[i] - s2[i];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Compare two strings.
|
|
*
|
|
* @param s1 The first string.
|
|
* @param s2 The second string.
|
|
* @return Returns a value less than zero, if s1 is shorter than s2. Returns
|
|
* zero, if s1 equals s2. Returns a value greater than zero, if
|
|
* s1 is longer than s2.
|
|
*/
|
|
int strcmp(const char *s1, const char *s2)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; 1; i++) {
|
|
if (s1[i] != s2[i])
|
|
return s1[i] - s2[i];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Compare two strings with fixed length.
|
|
*
|
|
* @param s1 The first string.
|
|
* @param s2 The second string.
|
|
* @param maxlen Return at most maxlen characters as length of the string.
|
|
* @return A non-zero value if s1 and s2 differ, or zero if s1 equals s2.
|
|
*/
|
|
int strncmp(const char *s1, const char *s2, size_t maxlen)
|
|
{
|
|
int i;
|
|
|
|
for (i = 0; i < maxlen; i++) {
|
|
if (s1[i] != s2[i])
|
|
return s1[i] - s2[i];
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/**
|
|
* Copy a string with a maximum length.
|
|
*
|
|
* @param d The destination memory.
|
|
* @param s The source string.
|
|
* @param n Copy at most n characters as length of the string.
|
|
* @return A pointer to the destination memory.
|
|
*/
|
|
char *strncpy(char *d, const char *s, size_t n)
|
|
{
|
|
/* Use +1 to get the NUL terminator. */
|
|
int max = n > strlen(s) + 1 ? strlen(s) + 1 : n;
|
|
int i;
|
|
|
|
for (i = 0; i < max; i++)
|
|
d[i] = (char)s[i];
|
|
|
|
return d;
|
|
}
|
|
|
|
/**
|
|
* Copy a string.
|
|
*
|
|
* @param d The destination memory.
|
|
* @param s The source string.
|
|
* @return A pointer to the destination memory.
|
|
*/
|
|
char *strcpy(char *d, const char *s)
|
|
{
|
|
return strncpy(d, s, strlen(s) + 1);
|
|
}
|
|
|
|
/**
|
|
* Concatenates two strings
|
|
*
|
|
* @param d The destination string.
|
|
* @param s The source string.
|
|
* @return A pointer to the destination string.
|
|
*/
|
|
char *strcat(char *d, const char *s)
|
|
{
|
|
char *p = d + strlen(d);
|
|
int sl = strlen(s);
|
|
int i;
|
|
|
|
for (i = 0; i < sl; i++)
|
|
p[i] = s[i];
|
|
|
|
p[i] = '\0';
|
|
return d;
|
|
}
|
|
|
|
/**
|
|
* Concatenates two strings with a maximum length.
|
|
*
|
|
* @param d The destination string.
|
|
* @param s The source string.
|
|
* @param n Not more than n characters from s will be appended to d.
|
|
* @return A pointer to the destination string.
|
|
*/
|
|
char *strncat(char *d, const char *s, size_t n)
|
|
{
|
|
char *p = d + strlen(d);
|
|
int sl = strlen(s);
|
|
int max = n > sl ? sl : n;
|
|
// int max = n > strlen(s) ? strlen(s) : n;
|
|
int i;
|
|
|
|
for (i = 0; i < max; i++)
|
|
p[i] = s[i];
|
|
|
|
p[i] = '\0';
|
|
return d;
|
|
}
|
|
|
|
/**
|
|
* Concatenates two strings with a maximum length.
|
|
*
|
|
* @param d The destination string.
|
|
* @param s The source string.
|
|
* @param n Not more than n characters from s will be appended to d.
|
|
* @return A pointer to the destination string.
|
|
*/
|
|
size_t strlcat(char *d, const char *s, size_t n)
|
|
{
|
|
int sl = strlen(s);
|
|
int dl = strlen(d);
|
|
|
|
char *p = d + dl;
|
|
int max = n > (sl + dl) ? sl : (n - dl - 1);
|
|
int i;
|
|
|
|
for (i = 0; i < max; i++)
|
|
p[i] = s[i];
|
|
|
|
p[i] = '\0';
|
|
return max;
|
|
}
|
|
|
|
/**
|
|
* Find a character in a string.
|
|
*
|
|
* @param s The string.
|
|
* @param c The character.
|
|
* @return A pointer to the first occurence of the character in the
|
|
* string, or NULL if the character was not encountered within the string.
|
|
*/
|
|
char *strchr(const char *s, int c)
|
|
{
|
|
char *p = (char *)s;
|
|
|
|
for (; *p != 0; p++) {
|
|
if (*p == c)
|
|
return p;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Find a character in a string.
|
|
*
|
|
* @param s The string.
|
|
* @param c The character.
|
|
* @return A pointer to the last occurence of the character in the
|
|
* string, or NULL if the character was not encountered within the string.
|
|
*/
|
|
|
|
char *strrchr(const char *s, int c)
|
|
{
|
|
char *p = (char *)s + strlen(s);
|
|
|
|
for (; p >= s; p--) {
|
|
if (*p == c)
|
|
return p;
|
|
}
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Duplicate a string.
|
|
*
|
|
* @param s The string to duplicate.
|
|
* @return A pointer to the copy of the original string.
|
|
*/
|
|
char *strdup(const char *s)
|
|
{
|
|
int n = strlen(s);
|
|
char *p = malloc(n + 1);
|
|
|
|
if (p != NULL) {
|
|
strncpy(p, s, n);
|
|
p[n] = 0;
|
|
}
|
|
return p;
|
|
}
|
|
|
|
/**
|
|
* Find a substring within a string.
|
|
*
|
|
* @param h The haystack string.
|
|
* @param n The needle string (substring).
|
|
* @return A pointer to the first occurence of the substring in
|
|
* the string, or NULL if the substring was not encountered within the string.
|
|
*/
|
|
char *strstr(const char *h, const char *n)
|
|
{
|
|
int hn = strlen(h);
|
|
int nn = strlen(n);
|
|
int i;
|
|
|
|
for (i = 0; i <= hn - nn; i++)
|
|
if (!memcmp(&h[i], n, nn))
|
|
return (char *)&h[i];
|
|
|
|
return NULL;
|
|
}
|
|
|
|
/**
|
|
* Separate strings.
|
|
*
|
|
* @param stringp reference of the string to separate.
|
|
* @param delim string containing all delimiters.
|
|
* @return Token string.
|
|
*/
|
|
char *strsep(char **stringp, const char *delim)
|
|
{
|
|
char *walk, *token;
|
|
|
|
if (!stringp || !*stringp || !**stringp)
|
|
return NULL;
|
|
|
|
token = walk = *stringp;
|
|
|
|
/* Walk, search for delimiters */
|
|
while(*walk && !strchr(delim, *walk))
|
|
walk++;
|
|
|
|
if (*walk) {
|
|
/* NUL terminate */
|
|
*walk = '\0';
|
|
walk++;
|
|
}
|
|
|
|
*stringp = walk;
|
|
|
|
return token;
|
|
}
|
|
|
|
/* Check that a character is in the valid range for the
|
|
given base
|
|
*/
|
|
|
|
static int _valid(char ch, int base)
|
|
{
|
|
char end = (base > 9) ? '9' : '0' + (base - 1);
|
|
|
|
/* all bases will be some subset of the 0-9 range */
|
|
|
|
if (ch >= '0' && ch <= end)
|
|
return 1;
|
|
|
|
/* Bases > 11 will also have to match in the a-z range */
|
|
|
|
if (base > 11) {
|
|
if (tolower(ch) >= 'a' &&
|
|
tolower(ch) <= 'a' + (base - 11))
|
|
return 1;
|
|
}
|
|
|
|
return 0;
|
|
}
|
|
|
|
/* Return the "value" of the character in the given base */
|
|
|
|
static int _offset(char ch, int base)
|
|
{
|
|
if (ch >= '0' && ch <= '9')
|
|
return ch - '0';
|
|
else
|
|
return tolower(ch) - 'a';
|
|
}
|
|
|
|
/**
|
|
* Convert the initial portion of a string into a signed int
|
|
* @param ptr A pointer to the string to convert
|
|
* @param endptr A pointer to the unconverted part of the string
|
|
* @param base The base of the number to convert, or 0 for auto
|
|
* @return A signed integer representation of the string
|
|
*/
|
|
|
|
long int strtol(const char *ptr, char **endptr, int base)
|
|
{
|
|
int ret = 0;
|
|
int negative = 1;
|
|
|
|
if (endptr != NULL)
|
|
*endptr = (char *) ptr;
|
|
|
|
/* Purge whitespace */
|
|
|
|
for( ; *ptr && isspace(*ptr); ptr++);
|
|
|
|
if (ptr[0] == '-') {
|
|
negative = -1;
|
|
ptr++;
|
|
}
|
|
|
|
if (!*ptr)
|
|
return 0;
|
|
|
|
/* Determine the base */
|
|
|
|
if (base == 0) {
|
|
if (ptr[0] == '0' && (ptr[1] == 'x' || ptr[1] == 'X'))
|
|
base = 16;
|
|
else if (ptr[0] == '0') {
|
|
base = 8;
|
|
ptr++;
|
|
}
|
|
else
|
|
base = 10;
|
|
}
|
|
|
|
/* Base 16 allows the 0x on front - so skip over it */
|
|
|
|
if (base == 16) {
|
|
if (ptr[0] == '0' && (ptr[1] == 'x' || ptr[1] == 'X'))
|
|
ptr += 2;
|
|
}
|
|
|
|
/* If the first character isn't valid, then don't
|
|
* bother */
|
|
|
|
if (!*ptr || !_valid(*ptr, base))
|
|
return 0;
|
|
|
|
for( ; *ptr && _valid(*ptr, base); ptr++)
|
|
ret = (ret * base) + _offset(*ptr, base);
|
|
|
|
if (endptr != NULL)
|
|
*endptr = (char *) ptr;
|
|
|
|
return ret * negative;
|
|
}
|
|
|
|
/**
|
|
* Convert the initial portion of a string into an unsigned int
|
|
* @param ptr A pointer to the string to convert
|
|
* @param endptr A pointer to the unconverted part of the string
|
|
* @param base The base of the number to convert, or 0 for auto
|
|
* @return An unsigned integer representation of the string
|
|
*/
|
|
|
|
unsigned long int strtoul(const char *ptr, char **endptr, int base)
|
|
{
|
|
int ret = 0;
|
|
|
|
if (endptr != NULL)
|
|
*endptr = (char *) ptr;
|
|
|
|
/* Purge whitespace */
|
|
|
|
for( ; *ptr && isspace(*ptr); ptr++);
|
|
|
|
if (!*ptr)
|
|
return 0;
|
|
|
|
/* Determine the base */
|
|
|
|
if (base == 0) {
|
|
if (ptr[0] == '0' && (ptr[1] == 'x' || ptr[1] == 'X'))
|
|
base = 16;
|
|
else if (ptr[0] == '0') {
|
|
base = 8;
|
|
ptr++;
|
|
}
|
|
else
|
|
base = 10;
|
|
}
|
|
|
|
/* Base 16 allows the 0x on front - so skip over it */
|
|
|
|
if (base == 16) {
|
|
if (ptr[0] == '0' && (ptr[1] == 'x' || ptr[1] == 'X'))
|
|
ptr += 2;
|
|
}
|
|
|
|
/* If the first character isn't valid, then don't
|
|
* bother */
|
|
|
|
if (!*ptr || !_valid(*ptr, base))
|
|
return 0;
|
|
|
|
for( ; *ptr && _valid(*ptr, base); ptr++)
|
|
ret = (ret * base) + _offset(*ptr, base);
|
|
|
|
if (endptr != NULL)
|
|
*endptr = (char *) ptr;
|
|
|
|
return ret;
|
|
}
|
|
|
|
/**
|
|
* Determine the number of leading characters in s that match characters in a
|
|
* @param s A pointer to the string to analyse
|
|
* @param a A pointer to an array of characters that match the prefix
|
|
* @return The number of matching characters
|
|
*/
|
|
|
|
size_t strspn(const char *s, const char *a)
|
|
{
|
|
int i, j;
|
|
int al = strlen(a);
|
|
for (i = 0; s[i] != 0; i++) {
|
|
int found = 0;
|
|
for (j = 0; j < al; j++) {
|
|
if (s[i] == a[j]) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (!found)
|
|
break;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
/**
|
|
* Determine the number of leading characters in s that do not match characters in a
|
|
* @param s A pointer to the string to analyse
|
|
* @param a A pointer to an array of characters that do not match the prefix
|
|
* @return The number of not matching characters
|
|
*/
|
|
|
|
size_t strcspn(const char *s, const char *a)
|
|
{
|
|
int i, j;
|
|
int al = strlen(a);
|
|
for (i = 0; s[i] != 0; i++) {
|
|
int found = 0;
|
|
for (j = 0; j < al; j++) {
|
|
if (s[i] == a[j]) {
|
|
found = 1;
|
|
break;
|
|
}
|
|
}
|
|
if (found)
|
|
break;
|
|
}
|
|
return i;
|
|
}
|
|
|
|
/**
|
|
* Extract first token in string str that is delimited by a character in tokens.
|
|
* Destroys str and eliminates the token delimiter.
|
|
* @param str A pointer to the string to tokenize.
|
|
* @param delim A pointer to an array of characters that delimit the token
|
|
* @param ptr A pointer to a string pointer to keep state of the tokenizer
|
|
* @return Pointer to token
|
|
*/
|
|
|
|
char* strtok_r(char *str, const char *delim, char **ptr)
|
|
{
|
|
/* start new tokenizing job or continue existing one? */
|
|
if (str == NULL)
|
|
str = *ptr;
|
|
|
|
/* skip over prefix delimiters */
|
|
char *start = str + strspn(str, delim);
|
|
|
|
/* find first delimiter character */
|
|
char *end = start + strcspn(start, delim);
|
|
end[0] = '\0';
|
|
|
|
*ptr = end+1;
|
|
return start;
|
|
}
|
|
|
|
static char **strtok_global;
|
|
|
|
/**
|
|
* Extract first token in string str that is delimited by a character in tokens.
|
|
* Destroys str, eliminates the token delimiter and uses global state.
|
|
* @param str A pointer to the string to tokenize.
|
|
* @param delim A pointer to an array of characters that delimit the token
|
|
* @return Pointer to token
|
|
*/
|
|
|
|
char* strtok(char *str, const char *delim)
|
|
{
|
|
return strtok_r(str, delim, strtok_global);
|
|
}
|
|
|
|
/**
|
|
* Print error message and error number
|
|
* @param s Error message to print
|
|
*/
|
|
void perror(const char *s)
|
|
{
|
|
printf("%s: %d\n", s?s:"(none)", errno);
|
|
}
|