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Fix printf width calculations

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K. Lange 2018-04-29 16:32:35 +09:00 committed by Kevin Lange
parent 0218dc3862
commit ec0480fc11
1 changed files with 22 additions and 5 deletions
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27
libc/printf.c
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@ -5,10 +5,27 @@
static void print_dec(unsigned int value, unsigned int width, char * buf, int * ptr, int fill_zero, int align_right) {
unsigned int n_width = 1;
unsigned int i = 9;
while (value > i && i < UINT32_MAX) {
n_width += 1;
i *= 10;
i += 9;
if (value < 10UL) {
n_width = 1;
} else if (value < 100UL) {
n_width = 2;
} else if (value < 1000UL) {
n_width = 3;
} else if (value < 10000UL) {
n_width = 4;
} else if (value < 100000UL) {
n_width = 5;
} else if (value < 1000000UL) {
n_width = 6;
} else if (value < 10000000UL) {
n_width = 7;
} else if (value < 100000000UL) {
n_width = 8;
} else if (value < 1000000000UL) {
n_width = 9;
} else {
n_width = 10;
}
int printed = 0;
@ -39,7 +56,7 @@ static void print_dec(unsigned int value, unsigned int width, char * buf, int *
printed++;
}
*ptr += n_width;
while (n_width + printed < width) {
while (printed < (int)width) {
buf[*ptr] = fill_zero ? '0' : ' ';
*ptr += 1;
printed += 1;