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Espresso 0.0.0e

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This commit is contained in:
David Goeke
2025-06-13 18:03:39 -05:00
parent 6d366537dd
commit 1e5b4a765b
40 changed files with 742 additions and 718 deletions
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120
lib/printf.c
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@ -34,7 +34,7 @@ void printf(const char* format, ...) {
if (format[i] == '%' && format[i + 1] != '\0') {
++i;
// Parse width (only supports zero-padding like %04x)
// Check for width (like %016llx)
int width = 0;
if (format[i] == '0') {
++i;
@ -44,6 +44,13 @@ void printf(const char* format, ...) {
}
}
// Check for 'll' prefix
bool is_ll = false;
if (format[i] == 'l' && format[i + 1] == 'l') {
is_ll = true;
i += 2;
}
switch (format[i]) {
case 's': {
const char* str = va_arg(args, const char*);
@ -67,13 +74,23 @@ void printf(const char* format, ...) {
break;
}
case 'x': {
uint32_t val = va_arg(args, uint32_t);
print_hex(val, width, false);
if (is_ll) {
uint64_t val = va_arg(args, uint64_t);
print_hex64(val, width ? width : 16, false);
} else {
uint32_t val = va_arg(args, uint32_t);
print_hex(val, width ? width : 8, false);
}
break;
}
case 'X': {
uint32_t val = va_arg(args, uint32_t);
print_hex(val, width, true);
if (is_ll) {
uint64_t val = va_arg(args, uint64_t);
print_hex64(val, width ? width : 16, true);
} else {
uint32_t val = va_arg(args, uint32_t);
print_hex(val, width ? width : 8, true);
}
break;
}
case 'p': {
@ -84,8 +101,8 @@ void printf(const char* format, ...) {
}
case 'f':
case 'F': {
double val = va_arg(args, double); // double is promoted from float
print_double(val, 2); // 2 decimal places
double val = va_arg(args, double);
print_double(val, 2);
break;
}
case '%': {
@ -106,41 +123,6 @@ void printf(const char* format, ...) {
va_end(args);
}
void print_double(double value, int precision)
{
// Handle the integer part
int32_t integer_part = (int32_t)value;
double fractional_part = value - integer_part;
// Print the integer part
print_int(integer_part);
// Print the decimal point
terminal_putchar('.');
// Print the fractional part (scaled up)
fractional_part *= 1;
for (int i = 0; i < precision; i++) {
fractional_part *= 10;
}
int32_t frac_int = (int32_t)fractional_part;
print_int(frac_int);
}
void print_uint(uint32_t value) {
char buffer[11]; // Enough for 32-bit unsigned int
int i = 0;
do {
buffer[i++] = '0' + (value % 10);
value /= 10;
} while (value > 0);
while (i--) {
terminal_putchar(buffer[i]);
}
}
void print_int(int32_t value) {
char buffer[12]; // Enough for 32-bit signed int (-2147483648)
@ -181,3 +163,57 @@ void print_hex(uint32_t value, int width, bool uppercase)
terminal_putchar(buffer[i]);
}
}
void print_double(double value, int precision)
{
// Handle the integer part
int32_t integer_part = (int32_t)value;
double fractional_part = value - integer_part;
// Print the integer part
print_int(integer_part);
// Print the decimal point
terminal_putchar('.');
// Print the fractional part (scaled up)
fractional_part *= 1;
for (int i = 0; i < precision; i++) {
fractional_part *= 10;
}
int32_t frac_int = (int32_t)fractional_part;
print_int(frac_int);
}
void print_uint(uint32_t value) {
char buffer[11]; // Enough for 32-bit unsigned int
int i = 0;
do {
buffer[i++] = '0' + (value % 10);
value /= 10;
} while (value > 0);
while (i--) {
terminal_putchar(buffer[i]);
}
}
void print_hex64(uint64_t value, int width, bool uppercase) {
char buffer[17] = {0};
const char* digits = uppercase ? "0123456789ABCDEF" : "0123456789abcdef";
int i = 0;
do {
buffer[i++] = digits[value % 16];
value /= 16;
} while (value > 0);
while (i < width)
buffer[i++] = '0';
while (i--)
terminal_putchar(buffer[i]);
}