FreeCalypso > hg > freecalypso-sw
view gsm-fw/sprintf/integer.c @ 992:a7b0b426f9ca
target-utils: boot ROM UART autodetection revamped
The new implementation should work with both the familiar Calypso C035
boot ROM version found in our regular targets as well as the older
Calypso F741979B version found on the vintage D-Sample board.
author | Mychaela Falconia <falcon@ivan.Harhan.ORG> |
---|---|
date | Wed, 30 Dec 2015 21:28:41 +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); }