49 lines
1.3 KiB
C
49 lines
1.3 KiB
C
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#include <fxlibc/printf.h>
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/* Fixed-point decimal formatter (extension: %D)
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(0) Pad with zeros, rather than spaces, on the left
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(-) Move spaces to the right (overrides '0')
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( ) Force a blank sign before nonnegative numbers
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(+) Force a sign before every number (overrides ' ')
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{len} Minimal number of characters to print
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{pre} Number of digits after the decimal dot */
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void __printf_format_D(
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struct __printf_output * restrict out,
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struct __printf_format * restrict opt,
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va_list * restrict args)
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{
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int64_t n = __printf_load_i(opt->size, args);
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/* Compute the sign and the absolute value */
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struct __printf_geometry g = {
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.sign = (n < 0) ? '-' : '+',
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.prefix = 0,
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.style = _PRINTF_NUMERIC,
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};
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if(n < 0) n = -n;
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/* Get the digit string */
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char digits[32];
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g.content = __printf_digits10(digits, n) + 1;
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__printf_compute_geometry(opt, &g);
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/* Print the result */
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__printf_outn(out, ' ', g.left_spaces);
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if(g.sign) __printf_out(out, g.sign);
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__printf_outn(out, '0', g.zeros);
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for(int i = g.content - 2; i >= 0; i--)
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{
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if(i == opt->precision - 1) __printf_out(out, '.');
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__printf_out(out, digits[i]);
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}
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__printf_outn(out, ' ', g.right_spaces);
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}
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void __printf_enable_fixed(void)
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{
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__printf_register('D', __printf_format_D);
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}
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