258 lines
6.4 KiB
C
258 lines
6.4 KiB
C
#include <stdarg.h>
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#include <stddef.h>
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#include <stdint.h>
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#include <lib/print.h>
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#include <lib/misc.h>
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#include <lib/term.h>
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#include <lib/libc.h>
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#if defined (BIOS)
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#include <lib/real.h>
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#endif
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#include <sys/cpu.h>
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#include <drivers/serial.h>
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#if defined (BIOS)
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static void s2_print(const char *s, size_t len) {
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for (size_t i = 0; i < len; i++) {
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struct rm_regs r = {0};
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char c = s[i];
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switch (c) {
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case '\n':
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r.eax = 0x0e00 | '\r';
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rm_int(0x10, &r, &r);
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r = (struct rm_regs){0};
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r.eax = 0x0e00 | '\n';
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rm_int(0x10, &r, &r);
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break;
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default:
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r.eax = 0x0e00 | s[i];
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rm_int(0x10, &r, &r);
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break;
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}
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}
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}
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#endif
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static const char *base_digits = "0123456789abcdef";
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#define PRINT_BUF_MAX 4096
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static void prn_str(char *print_buf, size_t *print_buf_i, const char *string) {
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size_t i;
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for (i = 0; string[i]; i++) {
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if (*print_buf_i == (PRINT_BUF_MAX - 1))
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break;
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print_buf[(*print_buf_i)++] = string[i];
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}
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print_buf[*print_buf_i] = 0;
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}
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static void prn_nstr(char *print_buf, size_t *print_buf_i, const char *string, size_t len) {
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size_t i;
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for (i = 0; i < len; i++) {
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if (*print_buf_i == (PRINT_BUF_MAX - 1))
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break;
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print_buf[(*print_buf_i)++] = string[i];
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}
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print_buf[*print_buf_i] = 0;
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}
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static void prn_char(char *print_buf, size_t *print_buf_i, char c) {
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if (*print_buf_i < (PRINT_BUF_MAX - 1)) {
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print_buf[(*print_buf_i)++] = c;
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}
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print_buf[*print_buf_i] = 0;
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}
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static void prn_i(char *print_buf, size_t *print_buf_i, int64_t x) {
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int i;
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char buf[20] = {0};
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if (!x) {
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prn_char(print_buf, print_buf_i, '0');
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return;
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}
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int sign = x < 0;
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if (sign) x = -x;
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for (i = 18; x; i--) {
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buf[i] = (x % 10) + 0x30;
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x = x / 10;
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}
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if (sign)
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buf[i] = '-';
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else
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i++;
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prn_str(print_buf, print_buf_i, buf + i);
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}
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static void prn_ui(char *print_buf, size_t *print_buf_i, uint64_t x) {
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int i;
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char buf[21] = {0};
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if (!x) {
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prn_char(print_buf, print_buf_i, '0');
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return;
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}
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for (i = 19; x; i--) {
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buf[i] = (x % 10) + 0x30;
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x = x / 10;
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}
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i++;
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prn_str(print_buf, print_buf_i, buf + i);
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}
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static void prn_x(char *print_buf, size_t *print_buf_i, uint64_t x) {
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int i;
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char buf[17] = {0};
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if (!x) {
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prn_str(print_buf, print_buf_i, "0x0");
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return;
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}
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for (i = 15; x; i--) {
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buf[i] = base_digits[(x % 16)];
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x = x / 16;
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}
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i++;
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prn_str(print_buf, print_buf_i, "0x");
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prn_str(print_buf, print_buf_i, buf + i);
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}
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void print(const char *fmt, ...) {
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va_list args;
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va_start(args, fmt);
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vprint(fmt, args);
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va_end(args);
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}
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static char print_buf[PRINT_BUF_MAX];
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void vprint(const char *fmt, va_list args) {
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size_t print_buf_i = 0;
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for (;;) {
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while (*fmt && *fmt != '%')
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prn_char(print_buf, &print_buf_i, *fmt++);
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if (!*fmt++)
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goto out;
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switch (*fmt++) {
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case 's': {
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char *str = (char *)va_arg(args, const char *);
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if (!str)
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prn_str(print_buf, &print_buf_i, "(null)");
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else
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prn_str(print_buf, &print_buf_i, str); }
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break;
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case 'S': {
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char *str = (char *)va_arg(args, const char *);
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size_t str_len = va_arg(args, size_t);
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if (!str)
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prn_str(print_buf, &print_buf_i, "(null)");
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else
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prn_nstr(print_buf, &print_buf_i, str, str_len); }
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break;
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case 'd':
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prn_i(print_buf, &print_buf_i, (int64_t)va_arg(args, int32_t));
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break;
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case 'u':
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prn_ui(print_buf, &print_buf_i, (uint64_t)va_arg(args, uint32_t));
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break;
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case 'x':
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prn_x(print_buf, &print_buf_i, (uint64_t)va_arg(args, uint32_t));
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break;
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case 'D':
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prn_i(print_buf, &print_buf_i, va_arg(args, int64_t));
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break;
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case 'U':
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prn_ui(print_buf, &print_buf_i, va_arg(args, uint64_t));
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break;
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case 'X':
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prn_x(print_buf, &print_buf_i, va_arg(args, uint64_t));
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break;
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case 'p':
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prn_x(print_buf, &print_buf_i, va_arg(args, uintptr_t));
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break;
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case 'c': {
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char c = (char)va_arg(args, int);
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prn_char(print_buf, &print_buf_i, c); }
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break;
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case '#': {
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bool printed = false;
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char *str = (char *)va_arg(args, const char *);
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for (int i = (int)strlen(str) - 1; i >= 0; i--) {
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if (str[i] != '#') {
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continue;
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}
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prn_nstr(print_buf, &print_buf_i, str, i);
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printed = true;
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break;
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}
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if (!printed) {
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prn_str(print_buf, &print_buf_i, str);
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}
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break;
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}
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default:
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prn_char(print_buf, &print_buf_i, '?');
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break;
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}
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}
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out:
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if (!quiet) {
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#if defined (BIOS)
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if (stage3_loaded) {
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#endif
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if (term != NULL) {
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term_write(term, print_buf, print_buf_i);
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}
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#if defined (BIOS)
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} else {
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s2_print(print_buf, print_buf_i);
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}
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#endif
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}
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for (size_t i = 0; i < print_buf_i; i++) {
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#if defined (__x86_64__) || defined (__i386__)
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if (E9_OUTPUT) {
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outb(0xe9, print_buf[i]);
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}
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#endif
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if ((!quiet && serial) || COM_OUTPUT) {
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switch (print_buf[i]) {
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case '\n':
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serial_out('\r');
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serial_out('\n');
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continue;
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case '\e':
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serial_out('\e');
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continue;
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}
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if (!isprint(print_buf[i])) {
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continue;
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}
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serial_out(print_buf[i]);
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}
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}
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}
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