Unwanted cropping occuring

I don't understand why this:

Code:

---

void printb( void const * addr, size_t const bits ) {
        size_t size = bits / CHAR_BIT, b = 0;
        uchar const *a = addr;
        uchar val;
        if ( bits % CHAR_BIT ) ++size;
        while ( size-- ) {
                for ( val = a[size]; val; val <<= 1, ++b ) {
                        if ( b == bits ) return;
                        putchar( '0' + !!(val & SCHAR_MIN) );
                }
        }
}
...
                putchar('\n');
                num = test.man;
                printb( &num, FPN_MAN_BIT );
                putchar('\n');
                num = mine.man;
                printb( &num, FPN_MAN_BIT );
                putchar('\n');

---

is giving me this:

Code:

---

gcc -Wall -o "test_fpn" "test_fpn.c" && "./test_fpn"
...
same = 0
001
01
test.man = 0000000200000 mine.man = 0000000400000 exp t = 082 m = 081 sig t = 0 m = 0 fpn t = 1.000000e+01 m = 6.000000e+00 value '1e+1'
same = 0
0011111101111001
011111
test.man = 00000003EBC20 mine.man = 0000000788000 exp t = 099 m = 090 sig t = 0 m = 0 fpn t = 1.000000e+08 m = 2.544640e+05 value '1e+8'
same = 0
00010101000000111111001
00101111101
test.man = 00000001502F9 mine.man = 00000002FA000 exp t = 0A0 m = 094 sig t = 0 m = 0 fpn t = 1.000000e+10 m = 2.877440e+06 value '1e+10'
Compilation finished successfully.

---

Don't mind the mantissa itself, I was trying to see what was the results of various attempts, gotta leave for work soon so would like to fix this particular issue before I do.

Edit: Never mind, figured it out, I forgot I needed to set the break condition as a seperate variable, I declared a new variable "bit" and just reset to 1 on each start of the loop and shifted it just like num but instead of testing if num was empty tested if bit was empty.