FreeCalypso > hg > fc-selenite

annotate src/libsys/sprintf/integer.c @ 134:7d50d8d13711

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FFS code sync with Magnetite + gcc version fix This change brings the new flash autodetection for FC and Pirelli targets from Magnetite, and should also fix the gcc version for C1xx and gtamodem targets, which were previously broken because they used TI's original flash autodetect code (which operates at address 0) while the boot ROM is mapped there.
author Mychaela Falconia <falcon@freecalypso.org>
date Tue, 11 Dec 2018 08:43:25 +0000
parents 425ab6d987f3
children
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1 /*
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2 * Embedded [v]sprintf() implementation by Mychaela Falconia,
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3 * loosely based on the 4.3BSD-Tahoe version.
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4 *
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5 * This module contains the integer conversion functions.
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6 */
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7
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8 #include <sys/types.h>
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9 #include <ctype.h>
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10 #include "defs.h"
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12 extern u_char * _sprintf_field(u_char *op, int width, int flags, int sign,
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13 u_char *body, int size, int dprec, int fpprec);
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14
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15 static const char lcdigits[] = "0123456789abcdef";
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16 static const char ucdigits[] = "0123456789ABCDEF";
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17
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18 u_char *
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19 _sprintf_integer(u_char *op, int width, int flags, int sign,
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20 unsigned number, int base, int prec)
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21 {
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22 const char *digits;
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23 char buf[12];
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24 char *t, *endp;
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25
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26 /*
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27 * ``... diouXx conversions ... if a precision is
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28 * specified, the 0 flag will be ignored.''
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29 * -- ANSI X3J11
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30 */
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31 if (prec >= 0)
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32 flags &= ~ZEROPAD;
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33
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34 if (flags & UPPERCASE)
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35 digits = ucdigits;
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36 else
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37 digits = lcdigits;
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38
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39 /*
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40 * ``The result of converting a zero value with an
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41 * explicit precision of zero is no characters.''
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42 * -- ANSI X3J11
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43 */
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44 t = endp = buf + sizeof(buf);
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45 if (number != 0 || prec != 0) {
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46 do {
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47 *--t = digits[number % base];
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48 number /= base;
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49 } while (number);
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50 if (flags & ALT && base == 8 && *t != '0')
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51 *--t = '0'; /* octal leading 0 */
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52 }
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53 return _sprintf_field(op, width, flags, sign, t, endp - t, prec, 0);
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54 }