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Convert BIN2HEX/HEX2BIN to functions and add the abs() family 

of functions while we're at it.

hex2bin() now also supports upper-case input characters.

Signed-off-by: Uwe Hermann <uwe@hermann-uwe.de>
Acked-by: Jordan Crouse <jordan.crouse@amd.com>



git-svn-id: svn://svn.coreboot.org/coreboot/trunk@3235 2b7e53f0-3cfb-0310-b3e9-8179ed1497e1
This commit is contained in:
Uwe Hermann 2008-04-11 18:38:04 +00:00
parent fad8c2bd7c
commit b103345a14
2 changed files with 57 additions and 4 deletions
Show Stats Download Patch File Download Diff File Expand all files Collapse all files

9
payloads/libpayload/include/libpayload.h
View File

@ -41,10 +41,6 @@
#define MAX(a,b) ((a) > (b) ? (a) : (b))
#define ARRAY_SIZE(a) (sizeof(a) / sizeof((a)[0]))
#define BIN2HEX(b) ("0123456789abcdef"[b & 15])
#define HEX2BIN(h) (('0' <= h && h <= '9') ? (h - '0') : \
('a' <= h && h <= 'f') ? (h - 'a' + 10) : 0)
#define LITTLE_ENDIAN 1234
#define BIG_ENDIAN 4321
#ifdef CONFIG_TARGET_I386
@ -119,6 +115,11 @@ void *realloc(void *ptr, size_t size);
/* libc/lib.c */
int bcd2dec(int b);
int dec2bcd(int d);
int abs(int j);
long int labs(long int j);
long long int llabs(long long int j);
u8 bin2hex(u8 b);
u8 hex2bin(u8 h);
/* libc/memory.c */
void *memset(void *s, int c, size_t n);

52
payloads/libpayload/libc/lib.c
View File

@ -27,6 +27,8 @@
* SUCH DAMAGE.
*/
#include <libpayload.h>
/*
* Convert a number in BCD format to decimal.
*
@ -49,3 +51,53 @@ int dec2bcd(int d)
return ((d / 10) << 4) | (d % 10);
}
/**
* Return the absolute value of the specified integer.
*
* @param val The integer of which we want to know the absolute value.
* @return The absolute value of the specified integer.
*/
int abs(int j)
{
return (j >= 0 ? j : -j);
}
long int labs(long int j)
{
return (j >= 0 ? j : -j);
}
long long int llabs(long long int j)
{
return (j >= 0 ? j : -j);
}
/**
* Given a 4-bit value, return the ASCII hex representation of it.
*
* @param b A 4-bit value which shall be converted to ASCII hex.
* @return The ASCII hex representation of the specified 4-bit value.
* Returned hex-characters will always be lower-case (a-f, not A-F).
*/
u8 bin2hex(u8 b)
{
return (b < 10) ? '0' + b : 'a' + (b - 10);
}
/**
* Given an ASCII hex input character, return its integer value.
*
* For example, the input value '6' will be converted to 6, 'a'/'A' will
* be converted to 10, 'f'/'F' will be converted to 15, and so on.
*
* The return value for invalid input characters is 0.
*
* @param h The input byte in ASCII hex format.
* @return The integer value of the specified ASCII hex byte.
*/
u8 hex2bin(u8 h)
{
return (('0' <= h && h <= '9') ? (h - '0') : \
('A' <= h && h <= 'F') ? (h - 'A' + 10) : \
('a' <= h && h <= 'f') ? (h - 'a' + 10) : 0);
}