OrionLibC
Barry Importing existing Orion LibC 03048a9 (2 years, 2 months ago)
diff --git a/stdio/dbgprintf.c b/stdio/dbgprintf.c
new file mode 100644
index 0000000..c1f5729
--- /dev/null
+++ b/stdio/dbgprintf.c
@@ -0,0 +1,30 @@
+#include <stdarg.h>
+#include <sys/syscall.h>
+
+int vsprintf(char *buf, const char *fmt, va_list args);
+
+/* Send message to Kernel Output */
+void
+dbgprintf(char *fmt, ...)
+{
+ char buf[1024];
+ va_list args;
+ va_start(args, fmt);
+ vsprintf(buf, fmt, args);
+ va_end(args);
+
+ int ret;
+ char *p = buf;
+ asm volatile("int $0x80" : "=a" (ret) : "0" (SYSCALL_DBGPRINTF),
+ "c" (1), "S" (&p));
+}
+
+/* Send an unformatted message to Kernel Output */
+void
+dbgputs(char *str)
+{
+ int ret;
+ asm volatile("int $0x80" : "=a" (ret) : "0" (SYSCALL_DBGPRINTF),
+ "c" (1), "S" (&str));
+
+}
diff --git a/stdio/fopen.c b/stdio/fopen.c
new file mode 100644
index 0000000..69aecca
--- /dev/null
+++ b/stdio/fopen.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+#include <fcntl.h>
+
+/* Open a file */
+FILE *
+fopen(const char *name, const char *mode)
+{
+ int fd;
+ FILE *fp;
+
+ if (*mode != 'r' && *mode != 'w' && *mode != 'a')
+ return NULL;
+
+ fp = malloc(sizeof(FILE));
+ if (!fp)
+ return NULL;
+
+ if (*mode == 'w')
+ fd = create(name, 0666);
+ else if (*mode == 'a')
+ fd = open(name, O_CREATE | O_WRONLY, 0);
+ else
+ fd = open(name, O_RDONLY, 0);
+ if (fd < 0) {
+ free(fp);
+ return NULL;
+ }
+ if (*mode == 'a')
+ lseek(fd, 0, SEEK_END);
+
+ fp->fd = fd;
+ fp->count = 0;
+ fp->buf = NULL;
+ fp->flags = (*mode == 'r') ? FILE_READ : FILE_WRITE;
+
+ return fp;
+}
diff --git a/stdio/getc.c b/stdio/getc.c
new file mode 100644
index 0000000..e1a8a8f
--- /dev/null
+++ b/stdio/getc.c
@@ -0,0 +1,48 @@
+#include <stdio.h>
+#include <stdlib.h>
+#include <unistd.h>
+
+/* Allocate and fill a file's buffer */
+static int
+_fillbuf(FILE *fp)
+{
+ int bufsize;
+
+ if ((fp->flags & (FILE_READ | FILE_EOF | FILE_ERR)) != FILE_READ)
+ return EOF;
+ bufsize = (fp->flags & FILE_UNBUF) ? 1 : 1024;
+
+ /* Create buffer */
+ if (fp->buf == NULL) {
+ fp->buf = malloc(bufsize);
+ if (!fp->buf)
+ return EOF;
+ }
+ fp->ptr = fp->buf;
+ fp->count = read(fp->fd, fp->ptr, bufsize);
+ if (--fp->count < 0) {
+ if (fp->count == -1)
+ fp->flags |= FILE_EOF;
+ else
+ fp->flags |= FILE_ERR;
+ fp->count = 0;
+ return EOF;
+ }
+ return (unsigned char) *fp->ptr++;
+}
+
+/* Get a character from a stream */
+inline int
+getc(FILE *stream)
+{
+ if (--stream->count >= 0)
+ return (unsigned char) *stream->ptr++;
+ return _fillbuf(stream);
+}
+
+/* Get a character from standard input */
+int
+getchar(void)
+{
+ getc(stdin);
+}
diff --git a/stdio/perror.c b/stdio/perror.c
new file mode 100644
index 0000000..c852582
--- /dev/null
+++ b/stdio/perror.c
@@ -0,0 +1,39 @@
+#include <stdio.h>
+#include <errno.h>
+
+int errno;
+const char *errorList[] = {
+ [ENONE] = "No error",
+ [EPERM] = "Operation not permitted",
+ [ENOENT] = "No such file or directory",
+ [ESRCH] = "No such process",
+ [EINVAL] = "Invalid argument",
+ [EBADF] = "Bad file descriptor",
+ [ENOEXEC] = "Exec format error",
+ [EMFILE] = "Too many open files",
+ [EFAULT] = "Bad address",
+ [EISDIR] = "Is a directory",
+ [ENOTDIR] = "Not a directory",
+ [EACCES] = "Permission denied",
+ [ENODEV] = "No such device",
+ [EEXIST] = "File exists",
+ [ENXIO] = "No such device or address",
+ [ENOTBLK] = "Block device required",
+ [ENOMEM] = "Cannot allocate memory",
+ [ECHILD] = "No child processes",
+ [ENOTTY] = "Inappropriate ioctl for device",
+};
+
+/* Display an error message for errno */
+void
+perror(const char *s)
+{
+ if (errno < 0 || errno >= (sizeof(errorList)/sizeof(errorList[0])))
+ return;
+ if (!s)
+ printf("%s\n", errorList[errno]);
+ else if (!s[0])
+ printf("%s\n", errorList[errno]);
+ else
+ printf("%s: %s\n", s, errorList[errno]);
+}
diff --git a/stdio/printf.c b/stdio/printf.c
new file mode 100644
index 0000000..de0d9a4
--- /dev/null
+++ b/stdio/printf.c
@@ -0,0 +1,21 @@
+#include <unistd.h>
+#include <stdarg.h>
+#include <sys/syscall.h>
+#include <stdio.h>
+
+int vsprintf(char *buf, const char *fmt, va_list args);
+
+/* Write a formatted string to stdout */
+int
+printf(const char *fmt, ...)
+{
+ int len;
+ char buf[8196];
+ va_list args;
+ va_start(args, fmt);
+ len = vsprintf(buf, fmt, args);
+ va_end(args);
+
+ len = write(STDOUT_FILENO, buf, len);
+ return len;
+}
diff --git a/stdio/puts.c b/stdio/puts.c
new file mode 100644
index 0000000..45113ef
--- /dev/null
+++ b/stdio/puts.c
@@ -0,0 +1,21 @@
+#include <unistd.h>
+#include <string.h>
+
+/* Write a string to stdout */
+int
+puts(const char *str)
+{
+ char end[] = "\n";
+ int len = strlen(str);
+ len = write(STDOUT_FILENO, (void *) str, len);
+ return len + write(STDOUT_FILENO, end, 1);
+}
+
+/* Write a character to stdout */
+int
+putchar(int c)
+{
+ char str[] = {(char) c, 0};
+ write(STDOUT_FILENO, str, 1);
+ return c;
+}
diff --git a/stdio/vsprintf.c b/stdio/vsprintf.c
new file mode 100644
index 0000000..88e2f9f
--- /dev/null
+++ b/stdio/vsprintf.c
@@ -0,0 +1,244 @@
+#include <stdarg.h>
+#include <string.h>
+
+#define is_digit(c) ((c) >= '0' && (c) <= '9')
+
+/* Do not convert */
+static int
+skip_atoi(const char **s)
+{
+ int i = 0;
+
+ while (is_digit(**s))
+ i = i*10 + *((*s)++) - '0';
+
+ return i;
+}
+
+#define ZEROPAD 1 /* pad with zero */
+#define SIGN 2 /* unsigned/signed long */
+#define PLUS 4 /* show plus */
+#define SPACE 8 /* space if plus */
+#define LEFT 16 /* left justified */
+#define SPECIAL 32 /* 0x */
+#define SMALL 64 /* use 'abcdef' instead of 'ABCDEF' */
+
+#define do_div(n,base) ({ \
+int __res; \
+__asm__("divl %4":"=a" (n),"=d" (__res):"0" (n),"1" (0),"r" (base)); \
+__res; })
+
+/* Convert a number to ASCII */
+static char *
+number(char *str, int num, int base, int size, int precision, int type)
+{
+ char c, sign, tmp[36];
+ const char *digits = "0123456789ABCDEFGHIJKLMNOPQRSTUVWXYZ";
+ int i;
+
+ if (type & SMALL)
+ digits = "0123456789abcdefghijklmnopqrstuvwxyz";
+ if (type & LEFT)
+ type &= ~ZEROPAD;
+ if (base < 2 || base > 36)
+ return 0;
+ c = (type & ZEROPAD) ? '0' : ' ' ;
+ if (type & SIGN && num < 0) {
+ sign = '-';
+ num = -num;
+ } else {
+ sign = (type & PLUS) ? '+' : ((type & SPACE) ? ' ' : 0);
+ }
+ if (sign)
+ size--;
+ if (type & SPECIAL)
+ if (base == 16)
+ size -= 2;
+ else if (base == 8)
+ size--;
+ i = 0;
+ if (num == 0)
+ tmp[i++] = '0';
+ else while (num != 0)
+ tmp[i++] = digits[do_div(num,base)];
+ if (i > precision)
+ precision = i;
+ size -= precision;
+ if (!(type & (ZEROPAD + LEFT)))
+ while (size-- > 0)
+ *str++ = ' ';
+ if (sign)
+ *str++ = sign;
+ if (type & SPECIAL)
+ if (base == 8) {
+ *str++ = '0';
+ } else if (base == 16) {
+ *str++ = '0';
+ *str++ = digits[33];
+ }
+ if (!(type & LEFT))
+ while (size-- > 0)
+ *str++ = c;
+ while (i < precision--)
+ *str++ = '0';
+ while (i-- > 0)
+ *str++ = tmp[i];
+ while (size-- > 0)
+ *str++ = ' ';
+ return str;
+}
+
+/* Print formatted to a buffer */
+int
+vsprintf(char *buf, const char *fmt, va_list args)
+{
+ int len, i;
+ char *str, *s;
+ int *ip, flags;
+ int field_width, precision, qualifier;
+
+ for (str = buf; *fmt; fmt++) {
+ if (*fmt != '%') {
+ *str++ = *fmt;
+ continue;
+ }
+
+ /* Process flags */
+ flags = 0;
+repeat:
+ fmt++;
+ switch (*fmt) {
+ case '-':
+ flags |= LEFT;
+ goto repeat;
+ case '+':
+ flags |= PLUS;
+ goto repeat;
+ case ' ':
+ flags |= SPACE;
+ goto repeat;
+ case '#':
+ flags |= SPECIAL;
+ goto repeat;
+ case '0':
+ flags |= ZEROPAD;
+ goto repeat;
+ }
+
+ /* Get field width */
+ field_width = -1;
+ if (is_digit(*fmt)) {
+ field_width = skip_atoi(&fmt);
+ } else if (*fmt == '*') {
+ field_width = va_arg(args, int);
+ fmt++;
+ if (field_width < 0) {
+ field_width = -field_width;
+ flags |= LEFT;
+ }
+ }
+
+ /* Get the precision */
+ precision = -1;
+ if (*fmt == '.') {
+ fmt++;
+ if (is_digit(*fmt)) {
+ precision = skip_atoi(&fmt);
+ } else if (*fmt == '*') {
+ precision = va_arg(args, int);
+ fmt++;
+ }
+ if (precision < 0)
+ precision = 0;
+ }
+
+ /* Get the conversion qualifier */
+ qualifier = -1;
+ if (*fmt == 'h' || *fmt == 'l' || *fmt == 'L') {
+ qualifier = *fmt;
+ fmt++;
+ }
+
+ switch (*fmt) {
+ case 'c':
+ if (!(flags & LEFT))
+ while (--field_width > 0)
+ *str++ = ' ';
+ *str++ = (unsigned char) va_arg(args, int);
+ while (--field_width > 0)
+ *str++ = ' ';
+ break;
+
+ case 's':
+ s = va_arg(args, char *);
+ len = strlen(s);
+ if (precision < 0)
+ precision = len;
+ else if (len > precision)
+ len = precision;
+
+ if (!(flags & LEFT))
+ while (len < field_width--)
+ *str++ = ' ';
+ for (i = 0; i < len; ++i)
+ *str++ = *s++;
+ while (len < field_width--)
+ *str++ = ' ';
+ break;
+
+ case 'o':
+ str = number(str, va_arg(args, unsigned long), 8,
+ field_width, precision, flags);
+ break;
+
+ case 'p':
+ if (field_width == -1) {
+ field_width = 8;
+ flags |= ZEROPAD;
+ }
+ str = number(str,
+ (unsigned long) va_arg(args, void *), 16,
+ field_width, precision, flags);
+ break;
+
+ case 'x':
+ flags |= SMALL;
+ /* FALLTHROUGH */
+ case 'X':
+ str = number(str, va_arg(args, unsigned long), 16,
+ field_width, precision, flags);
+ break;
+
+ case 'd': /* FALLTHROUGH */
+ case 'i':
+ flags |= SIGN;
+ /* FALLTHROUGH */
+ case 'u':
+ str = number(str, va_arg(args, unsigned long), 10,
+ field_width, precision, flags);
+ break;
+
+ case 'f':
+ str = number(str,
+ (unsigned long) va_arg(args, double), 10,
+ field_width, precision, flags);
+ break;
+
+ case 'n':
+ ip = va_arg(args, int *);
+ *ip = (str - buf);
+ break;
+
+ default:
+ if (*fmt != '%')
+ *str++ = '%';
+ if (*fmt)
+ *str++ = *fmt;
+ else
+ --fmt;
+ break;
+ }
+ }
+ *str = '\0';
+ return str-buf;
+}