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/* Copyright (c) 1995-2013 Xilinx, Inc. All rights reserved.
*
* Redistribution and use in source and binary forms, with or without
* modification, are permitted provided that the following conditions are
* met:
*
* 1. Redistributions source code must retain the above copyright notice,
* this list of conditions and the following disclaimer.
*
* 2. Redistributions in binary form must reproduce the above copyright
* notice, this list of conditions and the following disclaimer in the
* documentation and/or other materials provided with the distribution.
*
* 3. Neither the name of Xilinx nor the names of its contributors may be
* used to endorse or promote products derived from this software without
* specific prior written permission.
*
* THIS SOFTWARE IS PROVIDED BY THE COPYRIGHT HOLDER AND CONTRIBUTORS "AS
* IS" AND ANY EXPRESS OR IMPLIED WARRANTIES, INCLUDING, BUT NOT LIMITED
* TO, THE IMPLIED WARRANTIES OF MERCHANTABILITY AND FITNESS FOR A
* PARTICULAR PURPOSE ARE DISCLAIMED. IN NO EVENT SHALL THE COPYRIGHT
* HOLDER OR CONTRIBUTORS BE LIABLE FOR ANY DIRECT, INDIRECT, INCIDENTAL,
* SPECIAL, EXEMPLARY, OR CONSEQUENTIAL DAMAGES (INCLUDING, BUT NOT LIMITED
* TO, PROCUREMENT OF SUBSTITUTE GOODS OR SERVICES; LOSS OF USE, DATA, OR
* PROFITS; OR BUSINESS INTERRUPTION) HOWEVER CAUSED AND ON ANY THEORY OF
* LIABILITY, WHETHER IN CONTRACT, STRICT LIABILITY, OR TORT (INCLUDING
* NEGLIGENCE OR OTHERWISE) ARISING IN ANY WAY OUT OF THE USE OF THIS
* SOFTWARE, EVEN IF ADVISED OF THE POSSIBILITY OF SUCH DAMAGE.
*/
#include <ctype.h>
#include <string.h>
#include <stdarg.h>
extern void outbyte (char);
/*----------------------------------------------------*/
/* Use the following parameter passing structure to */
/* make xil_printf re-entrant. */
/*----------------------------------------------------*/
typedef struct params_s {
int len;
int num1;
int num2;
char pad_character;
int do_padding;
int left_flag;
} params_t;
/*---------------------------------------------------*/
/* The purpose of this routine is to output data the */
/* same as the standard printf function without the */
/* overhead most run-time libraries involve. Usually */
/* the printf brings in many kilobytes of code and */
/* that is unacceptable in most embedded systems. */
/*---------------------------------------------------*/
typedef char* charptr;
typedef int (*func_ptr)(int c);
/*---------------------------------------------------*/
/* */
/* This routine puts pad characters into the output */
/* buffer. */
/* */
static void padding( const int l_flag, params_t *par)
{
int i;
if (par->do_padding && l_flag && (par->len < par->num1))
for (i=par->len; i<par->num1; i++)
outbyte( par->pad_character);
}
/*---------------------------------------------------*/
/* */
/* This routine moves a string to the output buffer */
/* as directed by the padding and positioning flags. */
/* */
static void outs( charptr lp, params_t *par)
{
/* pad on left if needed */
par->len = strlen( lp);
padding( !(par->left_flag), par);
/* Move string to the buffer */
while (*lp && (par->num2)--)
outbyte( *lp++);
/* Pad on right if needed */
/* CR 439175 - elided next stmt. Seemed bogus. */
/* par->len = strlen( lp); */
padding( par->left_flag, par);
}
/*---------------------------------------------------*/
/* */
/* This routine moves a number to the output buffer */
/* as directed by the padding and positioning flags. */
/* */
static void outnum( const long n, const long base, params_t *par)
{
charptr cp;
int negative;
char outbuf[32];
const char digits[] = "0123456789ABCDEF";
unsigned long num;
/* Check if number is negative */
if (base == 10 && n < 0L) {
negative = 1;
num = -(n);
}
else{
num = (n);
negative = 0;
}
/* Build number (backwards) in outbuf */
cp = outbuf;
do {
*cp++ = digits[(int)(num % base)];
} while ((num /= base) > 0);
if (negative)
*cp++ = '-';
*cp-- = 0;
/* Move the converted number to the buffer and */
/* add in the padding where needed. */
par->len = strlen(outbuf);
padding( !(par->left_flag), par);
while (cp >= outbuf)
outbyte( *cp--);
padding( par->left_flag, par);
}
/*---------------------------------------------------*/
/* */
/* This routine gets a number from the format */
/* string. */
/* */
static int getnum( charptr* linep)
{
int n;
charptr cp;
n = 0;
cp = *linep;
while (isdigit(*cp))
n = n*10 + ((*cp++) - '0');
*linep = cp;
return(n);
}
/*---------------------------------------------------*/
/* */
/* This routine operates just like a printf/sprintf */
/* routine. It outputs a set of data under the */
/* control of a formatting string. Not all of the */
/* standard C format control are supported. The ones */
/* provided are primarily those needed for embedded */
/* systems work. Primarily the floaing point */
/* routines are omitted. Other formats could be */
/* added easily by following the examples shown for */
/* the supported formats. */
/* */
/* void esp_printf( const func_ptr f_ptr,
const charptr ctrl1, ...) */
void xil_printf( const charptr ctrl1, ...)
{
int long_flag;
int dot_flag;
params_t par;
char ch;
va_list argp;
charptr ctrl = ctrl1;
va_start( argp, ctrl1);
for ( ; *ctrl; ctrl++) {
/* move format string chars to buffer until a */
/* format control is found. */
if (*ctrl != '%') {
outbyte(*ctrl);
continue;
}
/* initialize all the flags for this format. */
dot_flag = long_flag = par.left_flag = par.do_padding = 0;
par.pad_character = ' ';
par.num2=32767;
try_next:
ch = *(++ctrl);
if (isdigit(ch)) {
if (dot_flag)
par.num2 = getnum(&ctrl);
else {
if (ch == '0')
par.pad_character = '0';
par.num1 = getnum(&ctrl);
par.do_padding = 1;
}
ctrl--;
goto try_next;
}
switch (tolower(ch)) {
case '%':
outbyte( '%');
continue;
case '-':
par.left_flag = 1;
break;
case '.':
dot_flag = 1;
break;
case 'l':
long_flag = 1;
break;
case 'd':
if (long_flag || ch == 'D') {
outnum( va_arg(argp, long), 10L, &par);
continue;
}
else {
outnum( va_arg(argp, int), 10L, &par);
continue;
}
case 'x':
outnum((long)va_arg(argp, int), 16L, &par);
continue;
case 's':
outs( va_arg( argp, charptr), &par);
continue;
case 'c':
outbyte( va_arg( argp, int));
continue;
case '\\':
switch (*ctrl) {
case 'a':
outbyte( 0x07);
break;
case 'h':
outbyte( 0x08);
break;
case 'r':
outbyte( 0x0D);
break;
case 'n':
outbyte( 0x0D);
outbyte( 0x0A);
break;
default:
outbyte( *ctrl);
break;
}
ctrl++;
break;
default:
continue;
}
goto try_next;
}
va_end( argp);
}
/*---------------------------------------------------*/
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