VinceAle7082/XanvicOS
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Half implemented printf() [DOESN'T COMPILE]

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Idk what to write, a friend wants to play minecraft so... here is the code I wrote before him calling me.
This commit is contained in:
Vincenzo Aleksey Brocato 2024-07-31 20:59:39 +02:00 committed by VinceAle7082
parent 0952cda630
commit 465e078a30
5 changed files with 191 additions and 4 deletions
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2
src/bootloader/stage2/main.err
View File

@ -1,3 +1,3 @@
stdio.h(4): Warning! W138: No newline at end of file
stdio.h(5): Warning! W138: No newline at end of file
main.c(8): Warning! W138: No newline at end of file
main.c(4): Warning! W303: Parameter 'bootDrive' has been defined, but not referenced

4
src/bootloader/stage2/stdint.h
View File

@ -8,5 +8,7 @@ typedef signed long int int32_t;
typedef unsigned long int uint32_t;
typedef signed long int int64_t;
typedef unsigned long int uint64_t;
typedef uint8_t bool;
#define true 1
#define false 0

151
src/bootloader/stage2/stdio.c
View File

@ -13,3 +13,154 @@ void puts(const char *str)
str++;
}
}
#define PRINTF_STATE_NORMAL 0
#define PRINTF_STATE_LENGHT 1
#define PRINTF_STATE_LENGHT_SHORT 2
#define PRINTF_STATE_LENGHT_LONG 1
#define PRINTF_STATE_SPEC 4
#define PRINTF_LENGTH_DEFAULT 0
#define PRINTF_LENGTH_SHORT_SHORT 1
#define PRINTF_LENGTH_SHORT 2
#define PRINTF_LENGTH_LONG 3
#define PRINTF_LENGTH_LONG_LONG 4
int* printf_number(int *argp, int length, bool sign, int radix)
const char g_HexChars[] = '0123456789abcdef'
void _cdecl printf(const char *fmt, ...)
{
int *argp = (int*)&fmt;
int state = PRINTF_STATE_NORMAL;
int length = PRINTF_LENGTH_DEFAULT;
int radix = 10;
bool sign = false;
argp++;
while (*fmt)
{
switch (state)
{
case PRINTF_STATE_NORMAL:
switch (*fmt)
{
case '%':
state = PRINTF_STATE_LENGHT;
break;
default:
putc(*fmt);
break;
}
case PRINTF_STATE_LENGHT:
switch (*fmt)
{
case 'h':
length = PRINTF_LENGTH_SHORT;
state = PRINTF_STATE_LENGHT_SHORT;
break;
case 'l':
length = PRINTF_LENGTH_LONG;
state = PRINTF_STATE_LENGHT_LONG;
break;
default:
goto PRINTF_STATE_SPEC;
}
break;
case PRINTF_LENGTH_SHORT:
if (*fmt == 'h')
{
length = PRINTF_LENGTH_SHORT_SHORT;
state = PRINTF_STATE_SPEC;
}
else
{
goto PRINTF_STATE_SPEC;
}
break;
case PRINTF_STATE_SPEC:
switch (*fmt)
{
case 'c':
putc((char)*argp);
argp++;
break;
case 's':
puts(*(char **)argp);
argp++;
break;
case '%':
putc('%');
break;
case 'd':
case 'i':
radix = 10;
sign = true;
argp = printf_number(argp, length, sign, radix);
break;
case 'u':
radix = 10;
sign = false;
argp = printf_number(argp, length, sign, radix);
break;
case 'x':
case 'X':
case 'p':
radix = 16;
sign = false;
argp = printf_number(argp, length, sign, radix);
break;
case 'o':
radix = 8;
sign = false;
argp = printf_number(argp, length, sign, radix);
break;
//Se è messo un carattere non valido questo codice fa in modo che li ignora.
default:
break;
}
//Porta le variabili allo stato di default / normale.
state = PRINTF_STATE_NORMAL;
length = PRINTF_LENGTH_DEFAULT;
radix = 10;
sign = false;
break;
}
fmt++;
}
}
int* printf_number(int* argp, int length, bool sign, int radix)
{
char buffer[32];
unsigned long long number;
int number_sign = 1;
int pos = 0;
switch (length)
{
case PRINTF_LENGTH_SHORT_SHORT:
case PRINTF_LENGTH_SHORT:
case PRINTF_LENGTH_LONG:
case PRINTF_LENGTH_LONG_LONG:
case PRINTF_LENGTH_DEFAULT:
if (sign)
{
int n = *argp;
if (n < 0)
{
n = -n;
number_sign = -1;
}
number = n;
}
else
{
number = (*unsigned int*)argp;
}
argp++;
break;
}
}

35
src/bootloader/stage2/stdio.err
View File

@ -1,2 +1,35 @@
stdio.h(4): Warning! W138: No newline at end of file
stdio.h(5): Warning! W138: No newline at end of file
x86.h(4): Warning! W138: No newline at end of file
stdio.c(31): Error! E1024: Declared symbol 'printf' is not in parameter list
stdio.c(31): Error! E1076: Missing semicolon at end of declaration
stdio.c(32): Error! E1034: Symbol 'argp' already defined
stdio.c(32): Note! I2002: 'argp' defined in: stdio.c(28)
stdio.c(32): Error! E1011: Symbol 'fmt' has not been declared
stdio.c(34): Error! E1034: Symbol 'length' already defined
stdio.c(34): Note! I2002: 'length' defined in: stdio.c(28)
stdio.c(35): Error! E1034: Symbol 'radix' already defined
stdio.c(35): Note! I2002: 'radix' defined in: stdio.c(28)
stdio.c(36): Error! E1034: Symbol 'sign' already defined
stdio.c(36): Note! I2002: 'sign' defined in: stdio.c(28)
stdio.c(38): Error! E1029: Expression must be 'pointer to ...'
stdio.c(43): Error! E1029: Expression must be 'pointer to ...'
stdio.c(49): Error! E1029: Expression must be 'pointer to ...'
stdio.c(49): Error! E1151: Parameter count does not agree with previous definition
stdio.c(49): Note! I2002: 'putc' defined in: stdio.c(4)
stdio.c(54): Error! E1029: Expression must be 'pointer to ...'
stdio.c(66): Error! E1038: Expecting label for goto statement
stdio.c(71): Error! E1029: Expression must be 'pointer to ...'
stdio.c(78): Error! E1038: Expecting label for goto statement
stdio.c(83): Error! E1029: Expression must be 'pointer to ...'
stdio.c(28): Warning! W303: Parameter 'sign' has been defined, but not referenced
stdio.c(28): Warning! W303: Parameter 'length' has been defined, but not referenced
stdio.c(28): Warning! W303: Parameter 'radix' has been defined, but not referenced
stdio.c(28): Warning! W303: Parameter 'argp' has been defined, but not referenced
stdio.c(132): Warning! W107: Missing return value for function 'printf_number'
stdio.c(135): Error! E1034: Symbol 'printf_number' already defined
stdio.c(137): Warning! W138: No newline at end of file
stdio.c(134): Warning! W303: Parameter 'sign' has been defined, but not referenced
stdio.c(134): Warning! W303: Parameter 'length' has been defined, but not referenced
stdio.c(134): Warning! W303: Parameter 'radix' has been defined, but not referenced
stdio.c(134): Warning! W303: Parameter 'argp' has been defined, but not referenced
stdio.c(137): Warning! W107: Missing return value for function 'printf_number'

1
src/bootloader/stage2/stdio.h
View File

@ -2,3 +2,4 @@
void putc(char c);
void puts(const char* str);
void _cdecl printf(const char *fmt, ...);