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Sync/kernel/print.c
Curle c5178d56bd Semantics.
2019-08-20 16:40:48 +01:00

574 lines
16 KiB
C
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/************************
*** Team Kitty, 2019 ***
*** Sync ***
***********************/
/* This file contains all of the xprintx functions.
* The most commonly used will be printf */
#include <kernel.h>
static inline int Max(int a, int b) { return (a > b ? a : b); }
static void printchar(int Char, void* Args);
static char* ksprintn(char* Buffer, size_t Number, int Base, int* Size, int Upper);
static void snprintfFunc(int Char, void* Args);
static void Newline(void* AP);
#define BPP 8
const char HexAsciiData[] = "0123456789abcdefhijklmnopqrstuvwxyz";
#define HexToASCII(hex) (HexAsciiData[hex])
#define ToUpper(c) ((c) - 0x20 * (((c) >= 'a') && ((c) <= 'z')))
#define MaxConvertBufferLength (sizeof(size_t) * BPP + 1)
typedef struct {
char* String;
size_t Remain;
} snprintf_args;
static char* ksprintn(char* Buffer, size_t Number, int Base, int* Size, int Upper) {
char* PrintBuffer;
char CharBuffer;
PrintBuffer = Buffer;
*PrintBuffer = '\0'; // Initialize just in case.
do {
CharBuffer = HexToASCII( Number % Base );
*++PrintBuffer = Upper ? ToUpper(CharBuffer) : CharBuffer;
} while (Number /= Base);
if(Size) {
*Size = PrintBuffer - Buffer;
}
return (PrintBuffer);
}
// This function is taken from the Linux kernel.
// TODO: make readable.
int kvprintf(char const *fmt, void (*func)(int, void*), void *arg, int radix, va_list ap) {
#define PCHAR(c) {int cc=(c); if (func) (*func)(cc,arg); else *d++ = cc; retval++; }
char nbuf[MaxConvertBufferLength];
char *d;
const char *p, *percent, *q;
unsigned char *up;
int ch, n;
uintmax_t num;
int base, lflag, qflag, tmp, width, ladjust, sharpflag, neg, sign, dot;
int cflag, hflag, jflag, tflag, zflag;
int bconv, dwidth, upper;
char padc;
int stop = 0, retval = 0;
num = 0;
q = NULL;
if (!func)
d = (char *) arg;
else
d = NULL;
if (fmt == NULL)
fmt = "(fmt null)\n";
if (radix < 2 || radix > 36)
radix = 10;
for (;;) {
padc = ' ';
width = 0;
while ((ch = (unsigned char)*fmt++) != '%' || stop) {
if (ch == '\0')
return (retval);
PCHAR(ch);
}
percent = fmt - 1;
qflag = 0; lflag = 0; ladjust = 0; sharpflag = 0; neg = 0;
sign = 0; dot = 0; bconv = 0; dwidth = 0; upper = 0;
cflag = 0; hflag = 0; jflag = 0; tflag = 0; zflag = 0;
reswitch: switch (ch = (unsigned char)*fmt++) {
case '.':
dot = 1;
goto reswitch;
case '#':
sharpflag = 1;
goto reswitch;
case '+':
sign = 1;
goto reswitch;
case '-':
ladjust = 1;
goto reswitch;
case '%':
PCHAR(ch);
break;
case '*':
if (!dot) {
width = va_arg(ap, int);
if (width < 0) {
ladjust = !ladjust;
width = -width;
}
} else {
dwidth = va_arg(ap, int);
}
goto reswitch;
case '0':
if (!dot) {
padc = '0';
goto reswitch;
}
/* FALLTHROUGH */
case '1': case '2': case '3': case '4':
case '5': case '6': case '7': case '8': case '9':
for (n = 0;; ++fmt) {
n = n * 10 + ch - '0';
ch = *fmt;
if (ch < '0' || ch > '9')
break;
}
if (dot)
dwidth = n;
else
width = n;
goto reswitch;
case 'b':
ladjust = 1;
bconv = 1;
goto handle_nosign;
case 'c':
width -= 1;
if (!ladjust && width > 0)
while (width--)
PCHAR(padc);
PCHAR(va_arg(ap, int));
if (ladjust && width > 0)
while (width--)
PCHAR(padc);
break;
case 'D':
up = va_arg(ap, unsigned char *);
p = va_arg(ap, char *);
if (!width)
width = 16;
while(width--) {
PCHAR(HexToASCII(*up >> 4));
PCHAR(HexToASCII(*up & 0x0f));
up++;
if (width)
for (q=p;*q;q++)
PCHAR(*q);
}
break;
case 'd':
case 'i':
base = 10;
sign = 1;
goto handle_sign;
case 'h':
if (hflag) {
hflag = 0;
cflag = 1;
} else
hflag = 1;
goto reswitch;
case 'j':
jflag = 1;
goto reswitch;
case 'l':
if (lflag) {
lflag = 0;
qflag = 1;
} else
lflag = 1;
goto reswitch;
case 'n':
if (jflag)
*(va_arg(ap, intmax_t *)) = retval;
else if (qflag)
*(va_arg(ap, long long *)) = retval;
else if (lflag)
*(va_arg(ap, long *)) = retval;
else if (zflag)
*(va_arg(ap, size_t *)) = retval;
else if (hflag)
*(va_arg(ap, short *)) = retval;
else if (cflag)
*(va_arg(ap, char *)) = retval;
else
*(va_arg(ap, int *)) = retval;
break;
case 'o':
base = 8;
goto handle_nosign;
case 'p':
base = 16;
sharpflag = (width == 0);
sign = 0;
num = (uintptr_t)va_arg(ap, void *);
goto number;
case 'q':
qflag = 1;
goto reswitch;
case 'r':
base = radix;
if (sign)
goto handle_sign;
goto handle_nosign;
case 's':
p = va_arg(ap, char *);
if (p == NULL)
p = "(null)";
if (!dot)
n = strlen (p);
else
for (n = 0; n < dwidth && p[n]; n++)
continue;
width -= n;
if (!ladjust && width > 0)
while (width--)
PCHAR(padc);
while (n--)
PCHAR(*p++);
if (ladjust && width > 0)
while (width--)
PCHAR(padc);
break;
case 't':
tflag = 1;
goto reswitch;
case 'u':
base = 10;
goto handle_nosign;
case 'X':
upper = 1;
__attribute__ ((fallthrough)); // For GCC to stop warning about a fallthrough here
case 'x':
base = 16;
goto handle_nosign;
case 'y':
base = 16;
sign = 1;
goto handle_sign;
case 'z':
zflag = 1;
goto reswitch;
handle_nosign:
sign = 0;
if (jflag)
num = va_arg(ap, uintmax_t);
else if (qflag)
num = va_arg(ap, unsigned long long);
else if (tflag)
num = va_arg(ap, ptrdiff_t);
else if (lflag)
num = va_arg(ap, unsigned long);
else if (zflag)
num = va_arg(ap, size_t);
else if (hflag)
num = (unsigned short)va_arg(ap, int);
else if (cflag)
num = (unsigned char)va_arg(ap, int);
else
num = va_arg(ap, unsigned int);
if (bconv) {
q = va_arg(ap, char *);
base = *q++;
}
goto number;
handle_sign:
if (jflag)
num = va_arg(ap, intmax_t);
else if (qflag)
num = va_arg(ap, long long);
else if (tflag)
num = va_arg(ap, ptrdiff_t);
else if (lflag)
num = va_arg(ap, long);
else if (zflag)
num = va_arg(ap, size_t);
else if (hflag)
num = (short)va_arg(ap, int);
else if (cflag)
num = (char)va_arg(ap, int);
else
num = va_arg(ap, int);
number:
if (sign && (intmax_t)num < 0) {
neg = 1;
num = -(intmax_t)num;
}
p = ksprintn(nbuf, num, base, &n, upper);
tmp = 0;
// There's weird behavior here with #. Don't use # to get 0x with zero-padding
// (e.g. use 0x%016qx instead, not %#016qx or %#018qx, the latter of which will pad
// 16 characters for nonzero numbers but zeros will have 18 characters).
// Same with octal: use a leading zero and don't rely on # if you want zero-padding.
// # works if you don't need zero padding, though.
if (sharpflag && num != 0) {
if (base == 8)
tmp++;
else if (base == 16)
tmp += 2;
}
if (neg)
tmp++;
if (!ladjust && padc == '0')
dwidth = width - tmp;
width -= tmp + Max(dwidth, n);
dwidth -= n;
if (!ladjust)
while (width-- > 0)
PCHAR(' ');
if (neg)
PCHAR('-');
if (sharpflag && num != 0) {
if (base == 8) {
PCHAR('0');
} else if (base == 16) {
PCHAR('0');
PCHAR('x');
}
}
while (dwidth-- > 0)
PCHAR('0');
while (*p)
PCHAR(*p--);
if (bconv && num != 0) {
/* %b conversion flag format. */
tmp = retval;
while (*q) {
n = *q++;
if (num & (1 << (n - 1))) {
PCHAR(retval != tmp ?
',' : '<');
for (; (n = *q) > ' '; ++q)
PCHAR(n);
} else
for (; *q > ' '; ++q)
continue;
}
if (retval != tmp) {
PCHAR('>');
width -= retval - tmp;
}
}
if (ladjust)
while (width-- > 0)
PCHAR(' ');
break;
default:
while (percent < fmt)
PCHAR(*percent++);
/*
* Since we ignore a formatting argument it is no
* longer safe to obey the remaining formatting
* arguments as the arguments will no longer match
* the format specs.
*/
stop = 1;
break;
}
}
#undef PCHAR
}
int snprintf(char* String, size_t Length, const char* Format, ...) {
int ReturnVal;
va_list AP;
va_start(AP, Format);
ReturnVal = vsnprintf(String, Length, Format, AP);
va_end(AP);
return (ReturnVal);
}
int vsnprintf(char* String, size_t Length, const char* Format, va_list AP) {
snprintf_args Info;
int ReturnVal;
Info.String = Format;
Info.Remain = Length;
ReturnVal = kvprintf(Format, snprintfFunc, &Info, 10, AP);
if (Info.Remain >= 1) {
*Info.String++ = '\0';
}
return ReturnVal;
}
static void snprintfFunc(int Char, void* Args) {
snprintf_args* Info = Args;
if(Info->Remain >= 2) {
*Info->String++ = Char;
Info->Remain--;
}
}
int vsnrprintf(char* String, size_t Length, int Radix, const char* Format, va_list AP) {
snprintf_args Info;
int ReturnVal;
Info.String = Format;
Info.Remain = Length;
ReturnVal = kvprintf(Format, snprintfFunc, &Info, Radix, AP);
if(Info.Remain >= 1) {
*Info.String++ = '\0';
}
return ReturnVal;
}
static void printchar(int Char, void* Args) {
PRINT_INFO* Arg = (PRINT_INFO*)Args;
switch(Char) {
case '\033':
// TODO: Escape codes!
break;
case '\x7F':
// TODO: Decide on DEL functionality?
break;
case '\x85': // Next Line (not Newline, this does some hijinks.)
Arg->cursorPos = 0;
Newline(Arg);
break;
case '\014': // Form Feed (Clear Screen)
ResetScreen();
break;
case '\a': // Alert
// TODO: Audio alert.
break;
case '\b': // Back a space - NOT backspace, does not remove previous character.
if(Arg->cursorPos != 0) {
Arg->cursorPos--;
}
break;
case '\r': // Carriage Return
Arg->cursorPos = 0;
break;
case '\v': // Vertical Tab - 6 line breaks.
for(int Line = 0; Line < 6; Line++) {
Newline(Arg);
}
break;
case '\n': // Newline.
Newline(Arg);
break;
case '\t': // Tab
for(int Spaces = 0; Spaces < 8; Spaces++) { // That's right. There are 8 spaces in a tab.
RenderText(Arg->defaultGPU, ' ', Arg->charHeight, Arg->charWidth, Arg->charFGColor, Arg->charHLColor, Arg->screenMinX, Arg->screenMinY, Arg->charScale, Arg->cursorPos);
Arg->cursorPos++; // Move our cursor one space along.
if(Arg->cursorPos * Arg->charWidth * Arg->charScale > (Arg->defaultGPU.Info->HorizontalResolution - Arg->charWidth * Arg->charScale)) { // Check for wraparound
Arg->cursorPos = 0;
Newline(Arg);
}
}
break;
// TODO: More codes!
default:
RenderText(Arg->defaultGPU, Char, Arg->charHeight, Arg->charWidth, Arg->charFGColor, Arg->charHLColor, Arg->screenMinX, Arg->screenMinY, Arg->charScale, Arg->cursorPos);
if(Arg->cursorPos * Arg->charWidth * Arg->charScale > (Arg->defaultGPU.Info->HorizontalResolution - Arg->charWidth * Arg->charScale)) { // Check for wraparound
Arg->cursorPos = 0;
Newline(Arg);
}
break;
}
}
static void Newline(void* Args) {
PRINT_INFO* Arg = (PRINT_INFO* )Args;
if ((Arg->screenMinY + Arg->charHeight * Arg->charScale) > (Arg->defaultGPU.Info->VerticalResolution - Arg->charHeight * Arg->charScale)) {
if(!Arg->scrollMode) {
// Scrollmode isn't set, so just overwrite the top.
Arg->screenMinY = 0;
} else if (Arg->scrollMode == Arg->charHeight * Arg->charScale) {
// Scroll mode is set to "smooth". This leaves no empty space at the bottom of the screen.
size_t ScrollLine = Arg->screenMinY + 2 * Arg->charHeight * Arg->charScale - Arg->defaultGPU.Info->VerticalResolution;
Arg->screenMinY = Arg->defaultGPU.Info->VerticalResolution - Arg->charHeight * Arg->charScale;
memmoveAVX( (EFI_PHYSICAL_ADDRESS*) Arg->defaultGPU.FrameBufferBase, (EFI_PHYSICAL_ADDRESS*)(Arg->defaultGPU.FrameBufferBase + Arg->defaultGPU.Info->PixelsPerScanline * 4 * ScrollLine), (Arg->defaultGPU.Info->VerticalResolution - ScrollLine) * Arg->defaultGPU.Info->PixelsPerScanline * 4);
if(Arg->charBGColor != 0xFF000000) {
memsetAVX_By4Bytes( (EFI_PHYSICAL_ADDRESS*)(Arg->defaultGPU.FrameBufferBase + (Arg->defaultGPU.Info->VerticalResolution - ScrollLine) * Arg->defaultGPU.Info->PixelsPerScanline * 4), Arg->charBGColor, (Arg->defaultGPU.Info->VerticalResolution - ScrollLine) * Arg->defaultGPU.Info->PixelsPerScanline);
}
} // TODO: Implement "quick" scroll.
else if (Arg->scrollMode == Arg->defaultGPU.Info->VerticalResolution) {
// Wipe screen.
if(Arg->charBGColor != 0xFF000000) {
memsetAVX_By4Bytes( (EFI_PHYSICAL_ADDRESS*)Arg->defaultGPU.FrameBufferBase, Arg->charBGColor, Arg->defaultGPU.Info->VerticalResolution * Arg->defaultGPU.Info->PixelsPerScanline);
}
} else {
size_t ScrollLine = Arg->screenMinY + 2 * Arg->charHeight * Arg->charScale - Arg->defaultGPU.Info->VerticalResolution;
Arg->screenMinY = Arg->defaultGPU.Info->VerticalResolution - Arg->charHeight * Arg->charScale;
// This offset correction is needed in case a font size/scale combination is not an integer multiple of the vertical resolution.
// Even if it is, changing scales or arg->y could cause a variable offset and that needs to be accounted for.
for(size_t SmoothScroll = 0; SmoothScroll < ScrollLine; SmoothScroll += Arg->scrollMode) {
memmoveAVX((EFI_PHYSICAL_ADDRESS* )Arg->defaultGPU.FrameBufferBase, (EFI_PHYSICAL_ADDRESS* )(Arg->defaultGPU.FrameBufferBase + Arg->defaultGPU.Info->PixelsPerScanline * 4 * Arg->scrollMode), (Arg->defaultGPU.Info->VerticalResolution - Arg->scrollMode - SmoothScroll) * Arg->defaultGPU.Info->PixelsPerScanline * 4);
if(Arg->charBGColor != 0xFF000000) {
memsetAVX_By4Bytes((EFI_PHYSICAL_ADDRESS* )(Arg->defaultGPU.FrameBufferBase + (Arg->defaultGPU.Info->VerticalResolution - Arg->scrollMode - SmoothScroll) * Arg->defaultGPU.Info->PixelsPerScanline * 4), Arg->charBGColor, Arg->scrollMode * Arg->defaultGPU.Info->PixelsPerScanline);
}
}
}
} else {
// No wraparound needed. Just move along.
Arg->screenMinY += Arg->charHeight * Arg->charScale;
}
}
int printf(const char* Format, ...) {
va_list AP;
int ReturnVal;
va_start(AP, Format);
ReturnVal = kvprintf(Format, printchar, &Print_Info, 10, AP);
va_end(AP);
return ReturnVal;
}
int vprintf(const char* Format, va_list AP) {
return kvprintf(Format, printchar, &Print_Info, 10, AP);
}
int sprintf(char* Buffer, const char* Format, ...) {
va_list AP;
va_start(AP, Format);
int ReturnVal = kvprintf(Format, NULL, (void*) Buffer, 10, AP);
Buffer[ReturnVal] = '\0';
va_end(AP);
return ReturnVal;
}
int vsprintf(char* Buffer, const char* Format, va_list AP) {
int ReturnVal = kvprintf(Format, NULL, (void*) Buffer, 10, AP);
Buffer[ReturnVal] = '\0';
return ReturnVal;
}
void printUnicode(CHAR16* String, size_t Size) {
for(size_t Char = 0; Char < Size; Char++) {
if( ((char*)String)[Char] != 0) {
printf("%c", ((char*)String)[Char]);
}
}
}
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