FreeCalypso > hg > freecalypso-sw
view gsm-fw/sprintf/integer.c @ 1021:8b52011dc66a
doc/Pirelli-Howto: update for the current situation
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
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date | Sat, 23 Apr 2016 06:19:09 +0000 |
parents | 7e45ada9c365 |
children |
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/* * Embedded [v]sprintf() implementation by Michael Spacefalcon, * loosely based on the 4.3BSD-Tahoe version. * * This module contains the integer conversion functions. */ #include <sys/types.h> #include <ctype.h> #include "defs.h" extern u_char * _sprintf_field(u_char *op, int width, int flags, int sign, u_char *body, int size, int dprec, int fpprec); static const char lcdigits[] = "0123456789abcdef"; static const char ucdigits[] = "0123456789ABCDEF"; u_char * _sprintf_integer(u_char *op, int width, int flags, int sign, unsigned number, int base, int prec) { const char *digits; char buf[12]; char *t, *endp; /* * ``... diouXx conversions ... if a precision is * specified, the 0 flag will be ignored.'' * -- ANSI X3J11 */ if (prec >= 0) flags &= ~ZEROPAD; if (flags & UPPERCASE) digits = ucdigits; else digits = lcdigits; /* * ``The result of converting a zero value with an * explicit precision of zero is no characters.'' * -- ANSI X3J11 */ t = endp = buf + sizeof(buf); if (number != 0 || prec != 0) { do { *--t = digits[number % base]; number /= base; } while (number); if (flags & ALT && base == 8 && *t != '0') *--t = '0'; /* octal leading 0 */ } return _sprintf_field(op, width, flags, sign, t, endp - t, prec, 0); }