Finish the Zynq demo.
Richard Barry
11 years ago
parent
2fc4e89b98
commit
c83414ccc4
@ -0,0 +1,293 @@
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/*
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Copyright 2001, 2002 Georges Menie (www.menie.org)
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stdarg version contributed by Christian Ettinger
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This program is free software; you can redistribute it and/or modify
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it under the terms of the GNU Lesser General Public License as published by
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the Free Software Foundation; either version 2 of the License, or
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(at your option) any later version.
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This program is distributed in the hope that it will be useful,
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but WITHOUT ANY WARRANTY; without even the implied warranty of
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MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
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GNU Lesser General Public License for more details.
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You should have received a copy of the GNU Lesser General Public License
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along with this program; if not, write to the Free Software
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Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA
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*/
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/*
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putchar is the only external dependency for this file,
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if you have a working putchar, leave it commented out.
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If not, uncomment the define below and
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replace outbyte(c) by your own function call.
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*/
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#define putchar(c) c
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#include <stdarg.h>
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static void printchar(char **str, int c)
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{
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//extern int putchar(int c);
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if (str) {
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**str = (char)c;
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++(*str);
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}
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else
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{
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(void)putchar(c);
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}
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}
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#define PAD_RIGHT 1
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#define PAD_ZERO 2
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static int prints(char **out, const char *string, int width, int pad)
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{
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register int pc = 0, padchar = ' ';
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if (width > 0) {
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register int len = 0;
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register const char *ptr;
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for (ptr = string; *ptr; ++ptr) ++len;
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if (len >= width) width = 0;
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else width -= len;
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if (pad & PAD_ZERO) padchar = '0';
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}
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if (!(pad & PAD_RIGHT)) {
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for ( ; width > 0; --width) {
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printchar (out, padchar);
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++pc;
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}
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}
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for ( ; *string ; ++string) {
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printchar (out, *string);
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++pc;
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}
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for ( ; width > 0; --width) {
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printchar (out, padchar);
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++pc;
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}
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return pc;
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}
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/* the following should be enough for 32 bit int */
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#define PRINT_BUF_LEN 12
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static int printi(char **out, int i, int b, int sg, int width, int pad, int letbase)
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{
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char print_buf[PRINT_BUF_LEN];
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register char *s;
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register int t, neg = 0, pc = 0;
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register unsigned int u = (unsigned int)i;
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if (i == 0) {
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print_buf[0] = '0';
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print_buf[1] = '\0';
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return prints (out, print_buf, width, pad);
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}
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if (sg && b == 10 && i < 0) {
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neg = 1;
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u = (unsigned int)-i;
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}
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s = print_buf + PRINT_BUF_LEN-1;
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*s = '\0';
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while (u) {
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t = (unsigned int)u % b;
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if( t >= 10 )
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t += letbase - '0' - 10;
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*--s = (char)(t + '0');
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u /= b;
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}
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if (neg) {
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if( width && (pad & PAD_ZERO) ) {
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printchar (out, '-');
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++pc;
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--width;
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}
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else {
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*--s = '-';
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}
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}
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return pc + prints (out, s, width, pad);
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}
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static int print( char **out, const char *format, va_list args )
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{
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register int width, pad;
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register int pc = 0;
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char scr[2];
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for (; *format != 0; ++format) {
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if (*format == '%') {
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++format;
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width = pad = 0;
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if (*format == '\0') break;
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if (*format == '%') goto out;
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if (*format == '-') {
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++format;
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pad = PAD_RIGHT;
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}
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while (*format == '0') {
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++format;
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pad |= PAD_ZERO;
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}
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for ( ; *format >= '0' && *format <= '9'; ++format) {
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width *= 10;
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width += *format - '0';
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}
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if( *format == 's' ) {
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register char *s = (char *)va_arg( args, int );
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pc += prints (out, s?s:"(null)", width, pad);
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continue;
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}
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if( *format == 'd' ) {
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pc += printi (out, va_arg( args, int ), 10, 1, width, pad, 'a');
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continue;
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}
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if( *format == 'x' ) {
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pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'a');
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continue;
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}
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if( *format == 'X' ) {
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pc += printi (out, va_arg( args, int ), 16, 0, width, pad, 'A');
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continue;
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}
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if( *format == 'u' ) {
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pc += printi (out, va_arg( args, int ), 10, 0, width, pad, 'a');
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continue;
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}
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if( *format == 'c' ) {
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/* char are converted to int then pushed on the stack */
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scr[0] = (char)va_arg( args, int );
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scr[1] = '\0';
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pc += prints (out, scr, width, pad);
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continue;
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}
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}
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else {
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out:
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printchar (out, *format);
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++pc;
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}
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}
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if (out) **out = '\0';
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va_end( args );
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return pc;
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}
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int printf(const char *format, ...)
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{
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va_list args;
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va_start( args, format );
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return print( 0, format, args );
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}
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int sprintf(char *out, const char *format, ...)
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{
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va_list args;
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va_start( args, format );
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return print( &out, format, args );
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}
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int snprintf( char *buf, unsigned int count, const char *format, ... )
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{
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va_list args;
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( void ) count;
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va_start( args, format );
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return print( &buf, format, args );
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}
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#ifdef TEST_PRINTF
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int main(void)
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{
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char *ptr = "Hello world!";
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char *np = 0;
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int i = 5;
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unsigned int bs = sizeof(int)*8;
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int mi;
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char buf[80];
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mi = (1 << (bs-1)) + 1;
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printf("%s\n", ptr);
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printf("printf test\n");
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printf("%s is null pointer\n", np);
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printf("%d = 5\n", i);
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printf("%d = - max int\n", mi);
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printf("char %c = 'a'\n", 'a');
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printf("hex %x = ff\n", 0xff);
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printf("hex %02x = 00\n", 0);
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printf("signed %d = unsigned %u = hex %x\n", -3, -3, -3);
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printf("%d %s(s)%", 0, "message");
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printf("\n");
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printf("%d %s(s) with %%\n", 0, "message");
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sprintf(buf, "justif: \"%-10s\"\n", "left"); printf("%s", buf);
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sprintf(buf, "justif: \"%10s\"\n", "right"); printf("%s", buf);
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sprintf(buf, " 3: %04d zero padded\n", 3); printf("%s", buf);
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sprintf(buf, " 3: %-4d left justif.\n", 3); printf("%s", buf);
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sprintf(buf, " 3: %4d right justif.\n", 3); printf("%s", buf);
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sprintf(buf, "-3: %04d zero padded\n", -3); printf("%s", buf);
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sprintf(buf, "-3: %-4d left justif.\n", -3); printf("%s", buf);
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sprintf(buf, "-3: %4d right justif.\n", -3); printf("%s", buf);
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return 0;
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}
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/*
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* if you compile this file with
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* gcc -Wall $(YOUR_C_OPTIONS) -DTEST_PRINTF -c printf.c
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* you will get a normal warning:
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* printf.c:214: warning: spurious trailing `%' in format
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* this line is testing an invalid % at the end of the format string.
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*
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* this should display (on 32bit int machine) :
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*
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* Hello world!
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* printf test
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* (null) is null pointer
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* 5 = 5
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* -2147483647 = - max int
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* char a = 'a'
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* hex ff = ff
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* hex 00 = 00
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* signed -3 = unsigned 4294967293 = hex fffffffd
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* 0 message(s)
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* 0 message(s) with %
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* justif: "left "
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* justif: " right"
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* 3: 0003 zero padded
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* 3: 3 left justif.
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* 3: 3 right justif.
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* -3: -003 zero padded
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* -3: -3 left justif.
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* -3: -3 right justif.
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*/
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#endif
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/* To keep linker happy. */
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int write( int i, char* c, int n)
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{
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(void)i;
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(void)n;
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(void)c;
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return 0;
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}
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