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/*
* linux/lib/vsprintf.c
*
* Copyright (C) 1991, 1992 Linus Torvalds
*/
/* vsprintf.c -- Lars Wirzenius & Linus Torvalds. */
/*
* Wirzenius wrote this portably, Torvalds fucked it up :-)
*/
#include <errno.h>
#include <malloc.h>
#include <vsprintf.h>
#include <linux/ctype.h>
/* from lib/kstrtox.c */
static const char *_parse_integer_fixup_radix(const char *s, uint *basep)
{
/* Look for a 0x prefix */
if (s[0] == '0') {
int ch = tolower(s[1]);
if (ch == 'x') {
*basep = 16;
s += 2;
} else if (!*basep) {
/* Only select octal if we don't have a base */
*basep = 8;
}
}
/* Use decimal by default */
if (!*basep)
*basep = 10;
return s;
}
/**
* decode_digit() - Decode a single character into its numeric digit value
*
* This ignore case
*
* @ch: Character to convert (expects '0'..'9', 'a'..'f' or 'A'..'F')
* Return: value of digit (0..0xf) or 255 if the character is invalid
*/
static uint decode_digit(int ch)
{
if (!isxdigit(ch))
return 256;
ch = tolower(ch);
return ch <= '9' ? ch - '0' : ch - 'a' + 0xa;
}
ulong simple_strtoul(const char *cp, char **endp, uint base)
{
ulong result = 0;
uint value;
cp = _parse_integer_fixup_radix(cp, &base);
while (value = decode_digit(*cp), value < base) {
result = result * base + value;
cp++;
}
if (endp)
*endp = (char *)cp;
return result;
}
ulong hextoul(const char *cp, char **endp)
{
return simple_strtoul(cp, endp, 16);
}
ulong dectoul(const char *cp, char **endp)
{
return simple_strtoul(cp, endp, 10);
}
int strict_strtoul(const char *cp, unsigned int base, unsigned long *res)
{
char *tail;
unsigned long val;
size_t len;
*res = 0;
len = strlen(cp);
if (len == 0)
return -EINVAL;
val = simple_strtoul(cp, &tail, base);
if (tail == cp)
return -EINVAL;
if ((*tail == '\0') ||
((len == (size_t)(tail - cp) + 1) && (*tail == '\n'))) {
*res = val;
return 0;
}
return -EINVAL;
}
long simple_strtol(const char *cp, char **endp, unsigned int base)
{
if (*cp == '-')
return -simple_strtoul(cp + 1, endp, base);
return simple_strtoul(cp, endp, base);
}
unsigned long ustrtoul(const char *cp, char **endp, unsigned int base)
{
unsigned long result = simple_strtoul(cp, endp, base);
switch (tolower(**endp)) {
case 'g':
result *= 1024;
/* fall through */
case 'm':
result *= 1024;
/* fall through */
case 'k':
result *= 1024;
(*endp)++;
if (**endp == 'i')
(*endp)++;
if (**endp == 'B')
(*endp)++;
}
return result;
}
unsigned long long ustrtoull(const char *cp, char **endp, unsigned int base)
{
unsigned long long result = simple_strtoull(cp, endp, base);
switch (tolower(**endp)) {
case 'g':
result *= 1024;
/* fall through */
case 'm':
result *= 1024;
/* fall through */
case 'k':
result *= 1024;
(*endp)++;
if (**endp == 'i')
(*endp)++;
if (**endp == 'B')
(*endp)++;
}
return result;
}
unsigned long long simple_strtoull(const char *cp, char **endp,
unsigned int base)
{
unsigned long long result = 0;
uint value;
cp = _parse_integer_fixup_radix(cp, &base);
while (value = decode_digit(*cp), value < base) {
result = result * base + value;
cp++;
}
if (endp)
*endp = (char *) cp;
return result;
}
long long simple_strtoll(const char *cp, char **endp, unsigned int base)
{
if (*cp == '-')
return -simple_strtoull(cp + 1, endp, base);
return simple_strtoull(cp, endp, base);
}
long trailing_strtoln_end(const char *str, const char *end, char const **endp)
{
const char *p;
if (!end)
end = str + strlen(str);
p = end - 1;
if (p > str && isdigit(*p)) {
do {
if (!isdigit(p[-1])) {
if (endp)
*endp = p;
return dectoul(p, NULL);
}
} while (--p > str);
}
if (endp)
*endp = end;
return -1;
}
long trailing_strtoln(const char *str, const char *end)
{
return trailing_strtoln_end(str, end, NULL);
}
long trailing_strtol(const char *str)
{
return trailing_strtoln(str, NULL);
}
void str_to_upper(const char *in, char *out, size_t len)
{
for (; len > 0 && *in; len--)
*out++ = toupper(*in++);
if (len)
*out = '\0';
}
const char **str_to_list(const char *instr)
{
const char **ptr;
char *str, *p;
int count, i;
/* don't allocate if the string is empty */
str = *instr ? strdup(instr) : (char *)instr;
if (!str)
return NULL;
/* count the number of space-separated strings */
for (count = *str != '\0', p = str; *p; p++) {
if (*p == ' ') {
count++;
*p = '\0';
}
}
/* allocate the pointer array, allowing for a NULL terminator */
ptr = calloc(count + 1, sizeof(char *));
if (!ptr) {
if (*str)
free(str);
return NULL;
}
for (i = 0, p = str; i < count; p += strlen(p) + 1, i++)
ptr[i] = p;
return ptr;
}
void str_free_list(const char **ptr)
{
if (ptr)
free((char *)ptr[0]);
free(ptr);
}
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