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Simplify left rotation to help the compiler

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This commit is contained in:
Kp 2013-06-09 19:23:16 +00:00
parent c60c2dea30
commit ac97642962
1 changed files with 3 additions and 10 deletions
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13
main/text.c
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@ -42,17 +42,10 @@ void free_text()
} }
// rotates a byte left one bit, preserving the bit falling off the right // rotates a byte left one bit, preserving the bit falling off the right
void static void encode_rotate_left(char *c)
encode_rotate_left(char *c)
{ {
int found; unsigned char v = *c;
*c = (v >> 7) | (v << 1);
found = 0;
if (*c & 0x80)
found = 1;
*c = *c << 1;
if (found)
*c |= 0x01;
} }
#define BITMAP_TBL_XOR 0xD3 #define BITMAP_TBL_XOR 0xD3