mirror of
git://projects.qi-hardware.com/openwrt-xburst.git
synced 2024-11-15 11:39:42 +02:00
ce814c1c05
git-svn-id: svn://svn.openwrt.org/openwrt/trunk/openwrt@3076 3c298f89-4303-0410-b956-a3cf2f4a3e73
325 lines
6.5 KiB
C
325 lines
6.5 KiB
C
/*
|
|
* Copyright (C) 2001 MontaVista Software Inc.
|
|
* Author: Jun Sun, jsun@mvista.com or jsun@junsun.net
|
|
*
|
|
* This program is free software; you can redistribute it and/or modify it
|
|
* under the terms of the GNU General Public License as published by the
|
|
* Free Software Foundation; either version 2 of the License, or (at your
|
|
* option) any later version.
|
|
*
|
|
*/
|
|
|
|
#include "print.h"
|
|
|
|
/* macros */
|
|
#define IsDigit(x) ( ((x) >= '0') && ((x) <= '9') )
|
|
#define Ctod(x) ( (x) - '0')
|
|
|
|
/* forward declaration */
|
|
extern int PrintChar(char *, char, int, int);
|
|
extern int PrintString(char *, char *, int, int);
|
|
extern int PrintNum(char *, unsigned long, int, int, int, int, char, int);
|
|
|
|
/* private variable */
|
|
static const char theFatalMsg[] = "fatal error in lp_Print!";
|
|
|
|
/* -*-
|
|
* A low level printf() function.
|
|
*/
|
|
void
|
|
lp_Print(void (*output)(void *, char *, int),
|
|
void * arg,
|
|
char *fmt,
|
|
va_list ap)
|
|
{
|
|
|
|
#define OUTPUT(arg, s, l) \
|
|
{ if (((l) < 0) || ((l) > LP_MAX_BUF)) { \
|
|
(*output)(arg, (char*)theFatalMsg, sizeof(theFatalMsg)-1); for(;;); \
|
|
} else { \
|
|
(*output)(arg, s, l); \
|
|
} \
|
|
}
|
|
|
|
char buf[LP_MAX_BUF];
|
|
|
|
char c;
|
|
char *s;
|
|
long int num;
|
|
|
|
int longFlag;
|
|
int negFlag;
|
|
int width;
|
|
int prec;
|
|
int ladjust;
|
|
char padc;
|
|
|
|
int length;
|
|
|
|
for(;;) {
|
|
{
|
|
/* scan for the next '%' */
|
|
char *fmtStart = fmt;
|
|
while ( (*fmt != '\0') && (*fmt != '%')) {
|
|
fmt ++;
|
|
}
|
|
|
|
/* flush the string found so far */
|
|
OUTPUT(arg, fmtStart, fmt-fmtStart);
|
|
|
|
/* are we hitting the end? */
|
|
if (*fmt == '\0') break;
|
|
}
|
|
|
|
/* we found a '%' */
|
|
fmt ++;
|
|
|
|
/* check for long */
|
|
if (*fmt == 'l') {
|
|
longFlag = 1;
|
|
fmt ++;
|
|
} else {
|
|
longFlag = 0;
|
|
}
|
|
|
|
/* check for other prefixes */
|
|
width = 0;
|
|
prec = -1;
|
|
ladjust = 0;
|
|
padc = ' ';
|
|
|
|
if (*fmt == '-') {
|
|
ladjust = 1;
|
|
fmt ++;
|
|
}
|
|
|
|
if (*fmt == '0') {
|
|
padc = '0';
|
|
fmt++;
|
|
}
|
|
|
|
if (IsDigit(*fmt)) {
|
|
while (IsDigit(*fmt)) {
|
|
width = 10 * width + Ctod(*fmt++);
|
|
}
|
|
}
|
|
|
|
if (*fmt == '.') {
|
|
fmt ++;
|
|
if (IsDigit(*fmt)) {
|
|
prec = 0;
|
|
while (IsDigit(*fmt)) {
|
|
prec = prec*10 + Ctod(*fmt++);
|
|
}
|
|
}
|
|
}
|
|
|
|
|
|
/* check format flag */
|
|
negFlag = 0;
|
|
switch (*fmt) {
|
|
case 'b':
|
|
if (longFlag) {
|
|
num = va_arg(ap, long int);
|
|
} else {
|
|
num = va_arg(ap, int);
|
|
}
|
|
length = PrintNum(buf, num, 2, 0, width, ladjust, padc, 0);
|
|
OUTPUT(arg, buf, length);
|
|
break;
|
|
|
|
case 'd':
|
|
case 'D':
|
|
if (longFlag) {
|
|
num = va_arg(ap, long int);
|
|
} else {
|
|
num = va_arg(ap, int);
|
|
}
|
|
if (num < 0) {
|
|
num = - num;
|
|
negFlag = 1;
|
|
}
|
|
length = PrintNum(buf, num, 10, negFlag, width, ladjust, padc, 0);
|
|
OUTPUT(arg, buf, length);
|
|
break;
|
|
|
|
case 'o':
|
|
case 'O':
|
|
if (longFlag) {
|
|
num = va_arg(ap, long int);
|
|
} else {
|
|
num = va_arg(ap, int);
|
|
}
|
|
length = PrintNum(buf, num, 8, 0, width, ladjust, padc, 0);
|
|
OUTPUT(arg, buf, length);
|
|
break;
|
|
|
|
case 'u':
|
|
case 'U':
|
|
if (longFlag) {
|
|
num = va_arg(ap, long int);
|
|
} else {
|
|
num = va_arg(ap, int);
|
|
}
|
|
length = PrintNum(buf, num, 10, 0, width, ladjust, padc, 0);
|
|
OUTPUT(arg, buf, length);
|
|
break;
|
|
|
|
case 'x':
|
|
if (longFlag) {
|
|
num = va_arg(ap, long int);
|
|
} else {
|
|
num = va_arg(ap, int);
|
|
}
|
|
length = PrintNum(buf, num, 16, 0, width, ladjust, padc, 0);
|
|
OUTPUT(arg, buf, length);
|
|
break;
|
|
|
|
case 'X':
|
|
if (longFlag) {
|
|
num = va_arg(ap, long int);
|
|
} else {
|
|
num = va_arg(ap, int);
|
|
}
|
|
length = PrintNum(buf, num, 16, 0, width, ladjust, padc, 1);
|
|
OUTPUT(arg, buf, length);
|
|
break;
|
|
|
|
case 'c':
|
|
c = (char)va_arg(ap, int);
|
|
length = PrintChar(buf, c, width, ladjust);
|
|
OUTPUT(arg, buf, length);
|
|
break;
|
|
|
|
case 's':
|
|
s = (char*)va_arg(ap, char *);
|
|
length = PrintString(buf, s, width, ladjust);
|
|
OUTPUT(arg, buf, length);
|
|
break;
|
|
|
|
case '\0':
|
|
fmt --;
|
|
break;
|
|
|
|
default:
|
|
/* output this char as it is */
|
|
OUTPUT(arg, fmt, 1);
|
|
} /* switch (*fmt) */
|
|
|
|
fmt ++;
|
|
} /* for(;;) */
|
|
|
|
/* special termination call */
|
|
OUTPUT(arg, "\0", 1);
|
|
}
|
|
|
|
|
|
/* --------------- local help functions --------------------- */
|
|
int
|
|
PrintChar(char * buf, char c, int length, int ladjust)
|
|
{
|
|
int i;
|
|
|
|
if (length < 1) length = 1;
|
|
if (ladjust) {
|
|
*buf = c;
|
|
for (i=1; i< length; i++) buf[i] = ' ';
|
|
} else {
|
|
for (i=0; i< length-1; i++) buf[i] = ' ';
|
|
buf[length - 1] = c;
|
|
}
|
|
return length;
|
|
}
|
|
|
|
int
|
|
PrintString(char * buf, char* s, int length, int ladjust)
|
|
{
|
|
int i;
|
|
int len=0;
|
|
char* s1 = s;
|
|
while (*s1++) len++;
|
|
if (length < len) length = len;
|
|
|
|
if (ladjust) {
|
|
for (i=0; i< len; i++) buf[i] = s[i];
|
|
for (i=len; i< length; i++) buf[i] = ' ';
|
|
} else {
|
|
for (i=0; i< length-len; i++) buf[i] = ' ';
|
|
for (i=length-len; i < length; i++) buf[i] = s[i-length+len];
|
|
}
|
|
return length;
|
|
}
|
|
|
|
int
|
|
PrintNum(char * buf, unsigned long u, int base, int negFlag,
|
|
int length, int ladjust, char padc, int upcase)
|
|
{
|
|
/* algorithm :
|
|
* 1. prints the number from left to right in reverse form.
|
|
* 2. fill the remaining spaces with padc if length is longer than
|
|
* the actual length
|
|
* TRICKY : if left adjusted, no "0" padding.
|
|
* if negtive, insert "0" padding between "0" and number.
|
|
* 3. if (!ladjust) we reverse the whole string including paddings
|
|
* 4. otherwise we only reverse the actual string representing the num.
|
|
*/
|
|
|
|
int actualLength =0;
|
|
char *p = buf;
|
|
int i;
|
|
|
|
do {
|
|
int tmp = u %base;
|
|
if (tmp <= 9) {
|
|
*p++ = '0' + tmp;
|
|
} else if (upcase) {
|
|
*p++ = 'A' + tmp - 10;
|
|
} else {
|
|
*p++ = 'a' + tmp - 10;
|
|
}
|
|
u /= base;
|
|
} while (u != 0);
|
|
|
|
if (negFlag) {
|
|
*p++ = '-';
|
|
}
|
|
|
|
/* figure out actual length and adjust the maximum length */
|
|
actualLength = p - buf;
|
|
if (length < actualLength) length = actualLength;
|
|
|
|
/* add padding */
|
|
if (ladjust) {
|
|
padc = ' ';
|
|
}
|
|
if (negFlag && !ladjust && (padc == '0')) {
|
|
for (i = actualLength-1; i< length-1; i++) buf[i] = padc;
|
|
buf[length -1] = '-';
|
|
} else {
|
|
for (i = actualLength; i< length; i++) buf[i] = padc;
|
|
}
|
|
|
|
|
|
/* prepare to reverse the string */
|
|
{
|
|
int begin = 0;
|
|
int end;
|
|
if (ladjust) {
|
|
end = actualLength - 1;
|
|
} else {
|
|
end = length -1;
|
|
}
|
|
|
|
while (end > begin) {
|
|
char tmp = buf[begin];
|
|
buf[begin] = buf[end];
|
|
buf[end] = tmp;
|
|
begin ++;
|
|
end --;
|
|
}
|
|
}
|
|
|
|
/* adjust the string pointer */
|
|
return length;
|
|
}
|