/*----------------------------------------------------------------
|
/*----------------------------------------------------------------
|
// //
|
// //
|
// printf.c //
|
// printf.c //
|
// //
|
// //
|
// This file is part of the Amber project //
|
// This file is part of the Amber project //
|
// http://www.opencores.org/project,amber //
|
// http://www.opencores.org/project,amber //
|
// //
|
// //
|
// Description //
|
// Description //
|
// printf functions for the mini-libc library. //
|
// printf functions for the mini-libc library. //
|
// //
|
// //
|
// Author(s): //
|
// Author(s): //
|
// - Conor Santifort, csantifort.amber@gmail.com //
|
// - Conor Santifort, csantifort.amber@gmail.com //
|
// //
|
// //
|
//////////////////////////////////////////////////////////////////
|
//////////////////////////////////////////////////////////////////
|
// //
|
// //
|
// Copyright (C) 2010 Authors and OPENCORES.ORG //
|
// Copyright (C) 2010 Authors and OPENCORES.ORG //
|
// //
|
// //
|
// This source file may be used and distributed without //
|
// This source file may be used and distributed without //
|
// restriction provided that this copyright statement is not //
|
// restriction provided that this copyright statement is not //
|
// removed from the file and that any derivative work contains //
|
// removed from the file and that any derivative work contains //
|
// the original copyright notice and the associated disclaimer. //
|
// the original copyright notice and the associated disclaimer. //
|
// //
|
// //
|
// This source file is free software; you can redistribute it //
|
// This source file is free software; you can redistribute it //
|
// and/or modify it under the terms of the GNU Lesser General //
|
// and/or modify it under the terms of the GNU Lesser General //
|
// Public License as published by the Free Software Foundation; //
|
// Public License as published by the Free Software Foundation; //
|
// either version 2.1 of the License, or (at your option) any //
|
// either version 2.1 of the License, or (at your option) any //
|
// later version. //
|
// later version. //
|
// //
|
// //
|
// This source is distributed in the hope that it will be //
|
// This source is distributed in the hope that it will be //
|
// useful, but WITHOUT ANY WARRANTY; without even the implied //
|
// useful, but WITHOUT ANY WARRANTY; without even the implied //
|
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
|
// warranty of MERCHANTABILITY or FITNESS FOR A PARTICULAR //
|
// PURPOSE. See the GNU Lesser General Public License for more //
|
// PURPOSE. See the GNU Lesser General Public License for more //
|
// details. //
|
// details. //
|
// //
|
// //
|
// You should have received a copy of the GNU Lesser General //
|
// You should have received a copy of the GNU Lesser General //
|
// Public License along with this source; if not, download it //
|
// Public License along with this source; if not, download it //
|
// from http://www.opencores.org/lgpl.shtml //
|
// from http://www.opencores.org/lgpl.shtml //
|
// //
|
// //
|
----------------------------------------------------------------*/
|
----------------------------------------------------------------*/
|
|
|
#include "stdio.h"
|
#include "stdio.h"
|
|
|
/* Defines */
|
/* Defines */
|
#define PAD_RIGHT 1
|
#define PAD_RIGHT 1
|
#define PAD_ZERO 2
|
#define PAD_ZERO 2
|
|
|
/* the following should be enough for 32 bit int */
|
/* the following should be enough for 32 bit int */
|
#define PRINT_BUF_LEN 16
|
#define PRINT_BUF_LEN 16
|
|
|
|
|
inline void outbyte(char** dst, char c)
|
inline void outbyte(char** dst, char c)
|
{
|
{
|
/* Note the standard number for stdout in Unix is 1 but
|
/* Note the standard number for stdout in Unix is 1 but
|
I use 0 here, because I don't support stdin or stderr
|
I use 0 here, because I don't support stdin or stderr
|
*/
|
*/
|
if (*dst)
|
if (*dst)
|
*(*dst)++ = c;
|
*(*dst)++ = c;
|
else
|
else
|
_outbyte(c);
|
_outbyte(c);
|
}
|
}
|
|
|
|
|
int sprintf(char* dst, const char *fmt, ...)
|
int sprintf(char* dst, const char *fmt, ...)
|
{
|
{
|
register unsigned long *varg = (unsigned long *)(&fmt);
|
register unsigned long *varg = (unsigned long *)(&fmt);
|
*varg++;
|
*varg++;
|
|
|
/* Need to pass a pointer to a pointer to the location to
|
/* Need to pass a pointer to a pointer to the location to
|
write the character, to that the pointer to the location
|
write the character, to that the pointer to the location
|
can be incremented by the final outpute function
|
can be incremented by the final outpute function
|
*/
|
*/
|
|
|
return print(&dst, fmt, varg);
|
return print(&dst, fmt, varg);
|
}
|
}
|
|
|
int printf(const char *fmt, ...)
|
int printf(const char *fmt, ...)
|
{
|
{
|
register unsigned long *varg = (unsigned long *)(&fmt);
|
register unsigned long *varg = (unsigned long *)(&fmt);
|
*varg++;
|
*varg++;
|
char *dst = 0;
|
char *dst = 0;
|
|
|
return print((char**)&dst, fmt, varg);
|
return print((char**)&dst, fmt, varg);
|
}
|
}
|
|
|
/* printf supports the following types of syntax ---
|
/* printf supports the following types of syntax ---
|
char *ptr = "Hello world!";
|
char *ptr = "Hello world!";
|
char *np = 0;
|
char *np = 0;
|
int i = 5;
|
int i = 5;
|
unsigned int bs = sizeof(int)*8;
|
unsigned int bs = sizeof(int)*8;
|
int mi;
|
int mi;
|
mi = (1 << (bs-1)) + 1;
|
mi = (1 << (bs-1)) + 1;
|
|
|
printf("%s\n", ptr);
|
printf("%s\n", ptr);
|
printf("printf test\n");
|
printf("printf test\n");
|
printf("%s is null pointer\n", np);
|
printf("%s is null pointer\n", np);
|
printf("%d = 5\n", i);
|
printf("%d = 5\n", i);
|
printf("%d = - max int\n", mi);
|
printf("%d = - max int\n", mi);
|
printf("char %c = 'a'\n", 'a');
|
printf("char %c = 'a'\n", 'a');
|
printf("hex %x = ff\n", 0xff);
|
printf("hex %x = ff\n", 0xff);
|
printf("hex %02x = 00\n", 0);
|
printf("hex %02x = 00\n", 0);
|
printf("signed %d = unsigned %u = hex %x\n", -3, -3, -3);
|
printf("signed %d = unsigned %u = hex %x\n", -3, -3, -3);
|
printf("%d %s(s)%", 0, "message");
|
printf("%d %s(s)%", 0, "message");
|
printf("\n");
|
printf("\n");
|
printf("%d %s(s) with %%\n", 0, "message");
|
printf("%d %s(s) with %%\n", 0, "message");
|
|
|
*/
|
*/
|
|
|
int print(char** dst, const char *format, unsigned long *varg)
|
int print(char** dst, const char *format, unsigned long *varg)
|
{
|
{
|
register int width, pad;
|
register int width, pad;
|
register int pc = 0;
|
register int pc = 0;
|
char scr[2];
|
char scr[2];
|
|
|
for (; *format != 0; ++format) {
|
for (; *format != 0; ++format) {
|
if (*format == '%') {
|
if (*format == '%') {
|
++format;
|
++format;
|
width = pad = 0;
|
width = pad = 0;
|
if (*format == '\0') break;
|
if (*format == '\0') break;
|
if (*format == '%') goto out;
|
if (*format == '%') goto out;
|
if (*format == '-') {
|
if (*format == '-') {
|
++format;
|
++format;
|
pad = PAD_RIGHT;
|
pad = PAD_RIGHT;
|
}
|
}
|
while (*format == '0') {
|
while (*format == '0') {
|
++format;
|
++format;
|
pad |= PAD_ZERO;
|
pad |= PAD_ZERO;
|
}
|
}
|
for ( ; *format >= '0' && *format <= '9'; ++format) {
|
for ( ; *format >= '0' && *format <= '9'; ++format) {
|
width *= 10;
|
width *= 10;
|
width += *format - '0';
|
width += *format - '0';
|
}
|
}
|
if( *format == 's' ) {
|
if( *format == 's' ) {
|
register char *s = *((char **)varg++);
|
register char *s = *((char **)varg++);
|
pc += prints (dst, s?s:"(null)", width, pad);
|
pc += prints (dst, s?s:"(null)", width, pad);
|
continue;
|
continue;
|
}
|
}
|
if( *format == 'd' ) {
|
if( *format == 'd' ) {
|
pc += printi (dst, *varg++, 10, 1, width, pad, 'a');
|
pc += printi (dst, *varg++, 10, 1, width, pad, 'a');
|
continue;
|
continue;
|
}
|
}
|
if( *format == 'x' ) {
|
if( *format == 'x' ) {
|
pc += printi (dst, *varg++, 16, 0, width, pad, 'a');
|
pc += printi (dst, *varg++, 16, 0, width, pad, 'a');
|
continue;
|
continue;
|
}
|
}
|
if( *format == 'X' ) {
|
if( *format == 'X' ) {
|
pc += printi (dst, *varg++, 16, 0, width, pad, 'A');
|
pc += printi (dst, *varg++, 16, 0, width, pad, 'A');
|
continue;
|
continue;
|
}
|
}
|
if( *format == 'u' ) {
|
if( *format == 'u' ) {
|
pc += printi (dst, *varg++, 10, 0, width, pad, 'a');
|
pc += printi (dst, *varg++, 10, 0, width, pad, 'a');
|
continue;
|
continue;
|
}
|
}
|
if( *format == 'c' ) {
|
if( *format == 'c' ) {
|
/* char are converted to int then pushed on the stack */
|
/* char are converted to int then pushed on the stack */
|
scr[0] = *varg++;
|
scr[0] = *varg++;
|
scr[1] = '\0';
|
scr[1] = '\0';
|
pc += prints (dst, scr, width, pad);
|
pc += prints (dst, scr, width, pad);
|
continue;
|
continue;
|
}
|
}
|
}
|
}
|
else {
|
else {
|
out:
|
out:
|
if (*format=='\n') outbyte(dst,'\r');
|
if (*format=='\n') outbyte(dst,'\r');
|
outbyte (dst, *format);
|
outbyte (dst, *format);
|
++pc;
|
++pc;
|
}
|
}
|
}
|
}
|
|
|
return pc;
|
return pc;
|
}
|
}
|
|
|
|
|
/* Print a string - no formatting characters will be interpreted here */
|
/* Print a string - no formatting characters will be interpreted here */
|
int prints(char** dst, const char *string, int width, int pad)
|
int prints(char** dst, const char *string, int width, int pad)
|
{
|
{
|
register int pc = 0, padchar = ' ';
|
register int pc = 0, padchar = ' ';
|
|
|
if (width > 0) {
|
if (width > 0) {
|
register int len = 0;
|
register int len = 0;
|
register const char *ptr;
|
register const char *ptr;
|
for (ptr = string; *ptr; ++ptr) ++len;
|
for (ptr = string; *ptr; ++ptr) ++len;
|
if (len >= width) width = 0;
|
if (len >= width) width = 0;
|
else width -= len;
|
else width -= len;
|
if (pad & PAD_ZERO) padchar = '0';
|
if (pad & PAD_ZERO) padchar = '0';
|
}
|
}
|
if (!(pad & PAD_RIGHT)) {
|
if (!(pad & PAD_RIGHT)) {
|
for ( ; width > 0; --width) {
|
for ( ; width > 0; --width) {
|
outbyte(dst, padchar);
|
outbyte(dst, padchar);
|
++pc;
|
++pc;
|
}
|
}
|
}
|
}
|
for ( ; *string ; ++string) {
|
for ( ; *string ; ++string) {
|
outbyte(dst, *string);
|
outbyte(dst, *string);
|
++pc;
|
++pc;
|
}
|
}
|
for ( ; width > 0; --width) {
|
for ( ; width > 0; --width) {
|
outbyte(dst, padchar);
|
outbyte(dst, padchar);
|
++pc;
|
++pc;
|
}
|
}
|
|
|
return pc;
|
return pc;
|
}
|
}
|
|
|
|
|
/* Printf an integer */
|
/* Printf an integer */
|
int printi(char** dst, unsigned long i, int b, int sg, int width, int pad, int letbase)
|
int printi(char** dst, int i, int b, int sg, int width, int pad, int letbase)
|
{
|
{
|
char print_buf[PRINT_BUF_LEN];
|
char print_buf[PRINT_BUF_LEN];
|
char *s;
|
char *s;
|
int t, neg = 0, pc = 0;
|
int t, neg = 0, pc = 0;
|
unsigned int u = i;
|
unsigned int u = i;
|
|
|
if (i == 0) {
|
if (i == 0) {
|
print_buf[0] = '0';
|
print_buf[0] = '0';
|
print_buf[1] = '\0';
|
print_buf[1] = '\0';
|
return prints (dst, print_buf, width, pad);
|
return prints (dst, print_buf, width, pad);
|
}
|
}
|
|
|
if (sg && b == 10 && i < 0) {
|
if (sg && b == 10 && i < 0) {
|
neg = 1;
|
neg = 1;
|
u = -i;
|
u = -i;
|
}
|
}
|
|
|
s = print_buf + PRINT_BUF_LEN-1;
|
s = print_buf + PRINT_BUF_LEN-1;
|
*s = '\0';
|
*s = '\0';
|
|
|
while (u) {
|
while (u) {
|
if ( b == 16 ) t = u & 0xf; /* hex modulous */
|
if ( b == 16 ) t = u & 0xf; /* hex modulous */
|
else t = u - ( _div (u, b) * b ); /* Modulous */
|
else t = u - ( _div (u, b) * b ); /* Modulous */
|
|
|
if( t >= 10 )
|
if( t >= 10 )
|
t += letbase - '0' - 10;
|
t += letbase - '0' - 10;
|
*--s = t + '0';
|
*--s = t + '0';
|
|
|
/* u /= b; */
|
/* u /= b; */
|
if ( b == 16) u = u >> 4; /* divide by 16 */
|
if ( b == 16) u = u >> 4; /* divide by 16 */
|
else u = _div(u, b);
|
else u = _div(u, b);
|
}
|
}
|
|
|
if (neg) {
|
if (neg) {
|
if( width && (pad & PAD_ZERO) ) {
|
if( width && (pad & PAD_ZERO) ) {
|
/* _outbyte('-'); */
|
/* _outbyte('-'); */
|
outbyte(dst,'-');
|
outbyte(dst,'-');
|
++pc;
|
++pc;
|
--width;
|
--width;
|
}
|
}
|
else {
|
else {
|
*--s = '-';
|
*--s = '-';
|
}
|
}
|
}
|
}
|
|
|
return pc + prints (dst, s, width, pad);
|
return pc + prints (dst, s, width, pad);
|
}
|
}
|
|
|
|
|
