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dc: support for bases 2 and 8, by Nate Case (ncase AT xes-inc.com)
function old new delta print_base 87 176 +89 set_output_base 81 95 +14 static.bases - 5 +5 ------------------------------------------------------------------------------ (add/remove: 1/0 grow/shrink: 2/0 up/down: 108/0) Total: 108 bytes
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@ -98,19 +98,45 @@ static void not(void)
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static void set_output_base(void)
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static void set_output_base(void)
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{
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{
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base = (unsigned)pop();
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static const char bases[] ALIGN1 = { 2, 8, 10, 16, 0 };
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if ((base != 10) && (base != 16)) {
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unsigned b = (unsigned)pop();
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bb_error_msg("error, base %d is not supported", base);
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base = *strchrnul(bases, b);
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if (base == 0) {
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bb_error_msg("error, base %u is not supported", b);
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base = 10;
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base = 10;
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}
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}
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}
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}
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static void print_base(double print)
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static void print_base(double print)
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{
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{
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if (base == 16)
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unsigned x, i;
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printf("%x\n", (unsigned)print);
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else
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if (base == 10) {
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printf("%g\n", print);
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printf("%g\n", print);
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return;
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}
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x = (unsigned)print;
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switch (base) {
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case 16:
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printf("%x\n", x);
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break;
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case 8:
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printf("%o\n", x);
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break;
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default: /* base 2 */
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i = (unsigned)INT_MAX + 1;
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do {
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if (x & i) break;
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i >>= 1;
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} while (i > 1);
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do {
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bb_putchar('1' - !(x & i));
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i >>= 1;
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} while (i);
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bb_putchar('\n');
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}
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}
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}
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static void print_stack_no_pop(void)
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static void print_stack_no_pop(void)
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