mirror of
https://gitlab.os-k.eu/os-k-team/os-k.git
synced 2023-08-25 14:03:10 +02:00
414 lines
12 KiB
C
414 lines
12 KiB
C
//----------------------------------------------------------------------------//
|
|
// GNU GPL OS/K //
|
|
// //
|
|
// Desc: Buffer library //
|
|
// //
|
|
// //
|
|
// Copyright © 2018-2020 The OS/K Team //
|
|
// //
|
|
// This file is part of OS/K. //
|
|
// //
|
|
// OS/K 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 3 of the License, or //
|
|
// any later version. //
|
|
// //
|
|
// OS/K is distributed in the hope that it will be useful, //
|
|
// but WITHOUT ANY WARRANTY//without even the implied warranty of //
|
|
// MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the //
|
|
// GNU General Public License for more details. //
|
|
// //
|
|
// You should have received a copy of the GNU General Public License //
|
|
// along with OS/K. If not, see <https://www.gnu.org/licenses/>. //
|
|
//----------------------------------------------------------------------------//
|
|
|
|
#include <lib/buf.h>
|
|
|
|
#ifdef _KALEID_KERNEL
|
|
#include <io/vga.h>
|
|
#endif
|
|
|
|
//
|
|
// Prints formatted string on buf according to fmt
|
|
//
|
|
size_t BPrintOnBuf(Buffer_t *buf, const char *fmt, ...)
|
|
{
|
|
size_t sz;
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
ExAcquireLock(&buf->lock);
|
|
sz = vbprintf(buf, fmt, ap);
|
|
ExReleaseLock(&buf->lock);
|
|
va_end(ap);
|
|
|
|
return sz;
|
|
}
|
|
|
|
size_t BPrintOnBufV(Buffer_t *buf, const char *fmt, va_list ap)
|
|
{
|
|
size_t sz;
|
|
|
|
ExAcquireLock(&buf->lock);
|
|
sz = vbprintf(buf, fmt, ap);
|
|
ExReleaseLock(&buf->lock);
|
|
|
|
return sz;
|
|
}
|
|
|
|
size_t bprintf(Buffer_t *buf, const char *fmt, ...)
|
|
{
|
|
error_t sz;
|
|
va_list ap;
|
|
|
|
va_start(ap, fmt);
|
|
sz = vbprintf(buf, fmt, ap);
|
|
va_end(ap);
|
|
|
|
return sz;
|
|
}
|
|
|
|
#define CONVBUFSIZE 100
|
|
|
|
//
|
|
// Actually does BPrintOnBuf's job; doesn't lock anything
|
|
// Quite a long function
|
|
//
|
|
size_t vbprintf(Buffer_t *buf, const char *fmt, va_list ap)
|
|
{
|
|
error_t rc = 0;
|
|
size_t written = 0;
|
|
|
|
ssize_t width, prec, len;
|
|
char type;
|
|
|
|
uchar uch;
|
|
char *s;
|
|
|
|
// Conversion buffer
|
|
char convbuf[CONVBUFSIZE];
|
|
|
|
// Flags
|
|
int plus, minus, space, zero, hash;
|
|
|
|
// Length modifiers
|
|
int l, h, hh;
|
|
|
|
// Signed
|
|
bool sgn;
|
|
|
|
// Capital digits
|
|
bool cap;
|
|
|
|
// Base
|
|
int base;
|
|
|
|
if (!buf || !fmt) { seterrno(EINVAL); return 0; }
|
|
if (buf->flags & (BF_EOF|BF_ERR)) { seterrno(EENDF); return 0; }
|
|
if (buf->state != BS_RDWR && buf->state != BS_WRONLY) {
|
|
seterrno(EBADF);
|
|
return 0;
|
|
}
|
|
|
|
// Progress in format string
|
|
while (*fmt && !rc) {
|
|
|
|
// Deal with all non-'%' characters
|
|
if (*fmt != '%') {
|
|
rc = bputc(buf, *fmt);
|
|
written++, fmt++;
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// %[flags][width|*][.precision|*][length]type
|
|
//
|
|
|
|
// Skip the '%'
|
|
fmt++;
|
|
|
|
// "%%" modifier
|
|
if (*fmt == '%') {
|
|
rc = bputc(buf, '%');
|
|
written++, fmt++;
|
|
continue;
|
|
}
|
|
|
|
// Reset everything
|
|
cap = sgn = 0;
|
|
l = h = hh = 0;
|
|
width = prec = 0;
|
|
plus = minus = space = zero = hash = 0;
|
|
|
|
//
|
|
// Flags field
|
|
//
|
|
while (*fmt) {
|
|
if (*fmt == '#') { fmt++; hash++; }
|
|
else if (*fmt == '0') { fmt++; zero++; }
|
|
else if (*fmt == '+') { fmt++; plus++; }
|
|
else if (*fmt == '-') { fmt++; minus++; }
|
|
else if (*fmt == ' ') { fmt++; space++; }
|
|
|
|
// Next field
|
|
else break;
|
|
}
|
|
|
|
//
|
|
// Width & precision fields
|
|
// A width field of zero is ignored
|
|
//
|
|
|
|
// Extracts either width or precision
|
|
#define bextractwp(name) \
|
|
do { \
|
|
if (*fmt == '*') { \
|
|
fmt++; \
|
|
name = va_arg(ap, int); \
|
|
} else { \
|
|
while (isdigit(*fmt)) { \
|
|
name = 10 * name + (*fmt - '0'); \
|
|
fmt++; \
|
|
} \
|
|
} \
|
|
} while (0)
|
|
|
|
// Extract width
|
|
bextractwp(width);
|
|
|
|
// A width below 0 activates the "minus" flag
|
|
if (width < 0) {
|
|
width = -width;
|
|
minus++;
|
|
}
|
|
|
|
// Extract precision
|
|
if (*fmt == '.') {
|
|
fmt++;
|
|
bextractwp(prec);
|
|
}
|
|
|
|
//
|
|
// Length field
|
|
//
|
|
|
|
while (*fmt) {
|
|
if (*fmt == 'l' || *fmt == 'z' || *fmt == 't') {
|
|
fmt++;
|
|
l++;
|
|
}
|
|
|
|
else if (*fmt == 'h') {
|
|
fmt++;
|
|
h++;
|
|
}
|
|
|
|
// Next field
|
|
else break;
|
|
}
|
|
|
|
// Consistency check
|
|
assert(!(l > 0 && h > 0));
|
|
assert(!(l > 2 || h > 1));
|
|
|
|
//
|
|
// The type field
|
|
//
|
|
type = *fmt++;
|
|
|
|
// Characters
|
|
if (type == 'c') {
|
|
uch = (uchar)va_arg(ap, int);
|
|
rc = bputc(buf, uch);
|
|
written++;
|
|
|
|
continue;
|
|
}
|
|
|
|
#ifdef _KALEID_KERNEL
|
|
if (type == 'C') {
|
|
base = va_arg(ap, int);
|
|
|
|
if (!(base < 0 || base > VGA_COLOR_WHITE)) {
|
|
rc = bputc(buf, RtlColorToChar(base));
|
|
written++;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
#endif
|
|
|
|
// Strings
|
|
if (type == 's') {
|
|
s = va_arg(ap, char *);
|
|
|
|
if (s == NULL) s = "(null)";
|
|
|
|
// For strings, the precision field gives the maximum
|
|
// amount of characters to be read from the stream
|
|
// Zero/nonspecified precision means unlimited amount
|
|
if (prec == 0) prec = INT_MAX;
|
|
|
|
for (; !rc && *s && prec-- ; s++) {
|
|
rc = bputc(buf, (uchar)*s);
|
|
written++;
|
|
}
|
|
|
|
continue;
|
|
}
|
|
|
|
|
|
// Make sure width and prec aren't too big
|
|
// (We didn't do that earlier because %s uses width)
|
|
if (width > CONVBUFSIZE || prec > CONVBUFSIZE) {
|
|
written++; // Work around "if (rc) return written - 1;"
|
|
rc = EINVAL;
|
|
break;
|
|
}
|
|
|
|
// Decimal, unsigned decimal, hexadecimal, octal and binary numbers
|
|
if (type == 'd' || type == 'i') { base = 10; sgn = 1; }
|
|
else if (type == 'X') { base = 16; cap = 1; }
|
|
else if (type == 'x') { base = 16; }
|
|
else if (type == 'u') { base = 10; }
|
|
else if (type == 'o') { base = 8; }
|
|
else if (type == 'b') { base = 2; }
|
|
|
|
// Pointers: %p = %#012lx
|
|
// (48-bit pointers have width 12 at least)
|
|
else if (type == 'p') {
|
|
type = 'x'; base = 16; zero++; hash++; l++;
|
|
if (width < 12) width = 12;
|
|
}
|
|
|
|
// End of string too soon
|
|
else if (type == '\0') {
|
|
bputc(buf, '%');
|
|
written++; // Work around "if (rc) return written - 1;"
|
|
rc = EINVAL;
|
|
break;
|
|
}
|
|
|
|
// Unknown/unsupported modifier
|
|
else {
|
|
rc = bputc(buf, '%');
|
|
written++;
|
|
continue;
|
|
}
|
|
|
|
//
|
|
// Numerical conversions
|
|
//
|
|
|
|
// We use s to iterate convbuf
|
|
s = convbuf;
|
|
|
|
#define bdoconvrt(pref, type, vtype) \
|
|
do { \
|
|
type i_##type = (type)va_arg(ap, vtype); \
|
|
pref##toa(i_##type, s, base); \
|
|
} while (0)
|
|
|
|
if (!l) {
|
|
if (sgn) {
|
|
if (h == 0) bdoconvrt(i, int, int);
|
|
if (h == 1) bdoconvrt(i, short, int);
|
|
} else {
|
|
if (h == 0) bdoconvrt(u, uint, uint);
|
|
if (h == 1) bdoconvrt(u, ushort, uint);
|
|
}
|
|
}
|
|
|
|
else {
|
|
if (sgn) bdoconvrt(l, long, long);
|
|
else bdoconvrt(ul, ulong, ulong);
|
|
}
|
|
|
|
//
|
|
// Implement flags and %X, and prints
|
|
//
|
|
|
|
// Capital letter digits
|
|
if (base > 10 && cap) {
|
|
for (; *s ; s++)
|
|
if (islower(*s)) *s = toupper(*s);
|
|
|
|
// We use this "opportunity" to compute the length of s
|
|
len = s - convbuf;
|
|
|
|
// Reset s
|
|
s = convbuf;
|
|
}
|
|
|
|
// Compute s's length
|
|
// It will always fit in an int
|
|
else len = (int)strlen(s);
|
|
|
|
// Adjust width
|
|
if (sgn && (plus || space)) width--;
|
|
else if (hash) {
|
|
width -= (base == 8 ? 1 :
|
|
((base == 2 || base == 16) ? 2 : 0));
|
|
}
|
|
|
|
// When padding with spaces, we pad before +/-'s etc
|
|
if (!minus && !zero && width > len) {
|
|
for (; !rc && width > len ; width--) {
|
|
rc = bputc(buf, ' ');
|
|
written++;
|
|
}
|
|
}
|
|
|
|
// Deal with signs and the hash flag
|
|
if (*s == '-') { rc = bputc(buf, '-'); s++, len--; written++; }
|
|
else if (sgn && plus) { rc = bputc(buf, '+'); written++; }
|
|
else if (sgn && space) { rc = bputc(buf, ' '); written++; }
|
|
|
|
// Print 0 for octal, 0x for hexadecimal, 0b for binary
|
|
else if (hash && (base == 2 || base == 8 || base == 16)) {
|
|
rc = bputc(buf, '0');
|
|
written++;
|
|
|
|
if (!rc && base != 8) {
|
|
rc = bputc(buf, (base == 2 ? 'b' : (cap ? 'X' : 'x')));
|
|
written++;
|
|
}
|
|
}
|
|
|
|
// Deal with padding by zeroes
|
|
// The 'minus' flag makes no sense with the 'zero' one
|
|
if (zero && width > len) {
|
|
for (; !rc && width > len ; width--) {
|
|
rc = bputc(buf, '0');
|
|
written++;
|
|
}
|
|
}
|
|
|
|
// Output the actual number
|
|
for (; !rc && *s ; s++) {
|
|
rc = bputc(buf, (uchar)*s);
|
|
written++;
|
|
}
|
|
|
|
// 'minus' padding, only with spaces
|
|
if (minus && !zero && width > len) {
|
|
for (; !rc && width > len ; width--) {
|
|
rc = bputc(buf, ' ');
|
|
written++;
|
|
}
|
|
}
|
|
|
|
// Carry on to next modifier
|
|
}
|
|
|
|
// For debugging purposes
|
|
assert(!rc && "vbprintf() error");
|
|
seterrno(rc);
|
|
|
|
if (rc)
|
|
return written - 1; // "- 1" because last bputc() must have failed
|
|
else
|
|
return written;
|
|
}
|
|
|