4 * Copyright (C) 1991, 1992 Linus Torvalds
9 #include <console/vtxprintf.h>
11 /* haha, don't need ctype.c */
12 #define isdigit(c) ((c) >= '0' && (c) <= '9')
13 #define is_digit isdigit
14 #define isxdigit(c) (((c) >= '0' && (c) <= '9') || ((c) >= 'a' && (c) <= 'f') || ((c) >= 'A' && (c) <= 'F'))
16 static int skip_atoi(const char **s)
21 i = i*10 + *((*s)++) - '0';
25 #define ZEROPAD 1 /* pad with zero */
26 #define SIGN 2 /* unsigned/signed long */
27 #define PLUS 4 /* show plus */
28 #define SPACE 8 /* space if plus */
29 #define LEFT 16 /* left justified */
30 #define SPECIAL 32 /* 0x */
31 #define LARGE 64 /* use 'ABCDEF' instead of 'abcdef' */
33 static int number(void (*tx_byte)(unsigned char byte),
34 unsigned long long num, int base, int size, int precision, int type)
37 const char *digits="0123456789abcdefghijklmnopqrstuvwxyz";
42 digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
45 if (base < 2 || base > 36)
47 c = (type & ZEROPAD) ? '0' : ' ';
50 if ((signed long long)num < 0) {
54 } else if (type & PLUS) {
57 } else if (type & SPACE) {
72 tmp[i++] = digits[do_div(num,base)];
76 if (!(type&(ZEROPAD+LEFT)))
78 tx_byte(' '), count++;
80 tx_byte(sign), count++;
83 tx_byte('0'), count++;
85 tx_byte('0'), count++;
86 tx_byte(digits[33]), count++;
92 while (i < precision--)
93 tx_byte('0'), count++;
95 tx_byte(tmp[i]), count++;
97 tx_byte(' '), count++;
102 int vtxprintf(void (*tx_byte)(unsigned char byte), const char *fmt, va_list args)
105 unsigned long long num;
109 int flags; /* flags to number() */
111 int field_width; /* width of output field */
112 int precision; /* min. # of digits for integers; max
113 number of chars for from string */
114 int qualifier; /* 'h', 'l', or 'L' for integer fields */
118 for (count=0; *fmt ; ++fmt) {
120 tx_byte(*fmt), count++;
127 ++fmt; /* this also skips first '%' */
129 case '-': flags |= LEFT; goto repeat;
130 case '+': flags |= PLUS; goto repeat;
131 case ' ': flags |= SPACE; goto repeat;
132 case '#': flags |= SPECIAL; goto repeat;
133 case '0': flags |= ZEROPAD; goto repeat;
136 /* get field width */
139 field_width = skip_atoi(&fmt);
140 else if (*fmt == '*') {
142 /* it's the next argument */
143 field_width = va_arg(args, int);
144 if (field_width < 0) {
145 field_width = -field_width;
150 /* get the precision */
155 precision = skip_atoi(&fmt);
156 else if (*fmt == '*') {
158 /* it's the next argument */
159 precision = va_arg(args, int);
165 /* get the conversion qualifier */
167 if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L') {
182 while (--field_width > 0)
183 tx_byte(' '), count++;
184 tx_byte((unsigned char) va_arg(args, int)), count++;
185 while (--field_width > 0)
186 tx_byte(' '), count++;
190 s = va_arg(args, char *);
194 len = strnlen(s, precision);
197 while (len < field_width--)
198 tx_byte(' '), count++;
199 for (i = 0; i < len; ++i)
200 tx_byte(*s++), count++;
201 while (len < field_width--)
202 tx_byte(' '), count++;
206 if (field_width == -1) {
207 field_width = 2*sizeof(void *);
210 count += number(tx_byte,
211 (unsigned long) va_arg(args, void *), 16,
212 field_width, precision, flags);
217 if (qualifier == 'L') {
218 long long *ip = va_arg(args, long long *);
220 } else if (qualifier == 'l') {
221 long * ip = va_arg(args, long *);
224 int * ip = va_arg(args, int *);
230 tx_byte('%'), count++;
233 /* integer number formats - set up the flags and "break" */
251 tx_byte('%'), count++;
253 tx_byte(*fmt), count++;
258 if (qualifier == 'L') {
259 num = va_arg(args, unsigned long long);
260 } else if (qualifier == 'l') {
261 num = va_arg(args, unsigned long);
262 } else if (qualifier == 'h') {
263 num = (unsigned short) va_arg(args, int);
266 } else if (flags & SIGN) {
267 num = va_arg(args, int);
269 num = va_arg(args, unsigned int);
271 count += number(tx_byte, num, base, field_width, precision, flags);