libc: Introduce files from SCC

Taken from http://git.simple-cc.org/scc/ from the following commit:

67508ad14af314cea2229783d3c084f28c41daf0

Permission has been granted from the author to use them under the
license BSD-3-Clause instead of ISC.

Change-Id: I65c0ce3ab60c49d34a57533af12a74bd7bde88e5
Signed-off-by: Antonio Nino Diaz <antonio.ninodiaz@arm.com>

include/lib/libc/stdio.h

@@ -0,0 +1,133 @@
+/*
+ * Copyright (c) 2012-2017 Roberto E. Vargas Caballero
+ *
+ * SPDX-License-Identifier: BSD-3-Clause
+ */
+
+#ifndef _STDIO_H
+#define _STDIO_H
+
+#include <arch/stdio.h>
+
+#ifndef FOPEN_MAX
+#define FOPEN_MAX 12
+#endif
+
+#ifndef NULL
+#define NULL ((void *) 0)
+#endif
+
+#define EOF            -1
+#define SEEK_CUR        0
+#define SEEK_END        1
+#define SEEK_SET        2
+
+
+#define _IOWRITE        (1 << 0)
+#define _IOREAD         (1 << 1)
+#define _IORW           (1 << 2)
+#define _IOEOF          (1 << 3)
+#define _IOERR          (1 << 4)
+#define _IOSTRG         (1 << 5)
+#define _IOTXT          (1 << 6)
+#define _IOFBF          (1 << 7)
+#define _IOLBF          (1 << 8)
+#define _IONBF          (1 << 9)
+#define _IOALLOC        (1 <<10)
+
+typedef struct {
+	int fd;        	        /* file descriptor */
+	unsigned char *buf;     /* pointer to i/o buffer */
+	unsigned char *rp;      /* read pointer */
+	unsigned char *wp;      /* write pointer */
+	unsigned char *lp;      /* write pointer used when line-buffering */
+	size_t len;             /* actual length of buffer */
+	unsigned short flags;
+	unsigned char unbuf[1];  /* tiny buffer for unbuffered io */
+} FILE;
+
+extern FILE __iob[FOPEN_MAX];
+
+#define	stdin	(&__iob[0])
+#define	stdout	(&__iob[1])
+#define	stderr	(&__iob[2])
+
+extern int remove(const char *filename);
+extern int rename(const char *old, const char *new);
+extern FILE *tmpfile(void);
+extern char *tmpnam(char *s);
+extern int fclose(FILE *fp);
+extern int fflush(FILE *fp);
+extern FILE *fopen(const char * restrict fname, const char * restrict mode);
+extern FILE *freopen(const char * restrict fname, const char * restrict mode,
+                     FILE * restrict fp);
+extern void setbuf(FILE * restrict fp, char * restrict buf);
+extern int setvbuf(FILE * restrict fp,
+                   char * restrict buf, int mode, size_t size);
+extern int fprintf(FILE * restrict fp, const char * restrict fmt, ...);
+extern int fscanf(FILE * restrict fp, const char * restrict fmt, ...);
+extern int printf(const char * restrict fmt, ...);
+extern int scanf(const char * restrict fmt, ...);
+extern int snprintf(char * restrict s,
+                    size_t n, const char * restrict fmt, ...);
+extern int sprintf(char * restrict s, const char * restrict fmt, ...);
+extern int sscanf(const char * restrict s, const char * restrict fmt, ...);
+
+#ifdef _STDARG_H
+extern int vfprintf(FILE * restrict fp,
+                    const char * restrict fmt, va_list arg);
+extern int vfscanf(FILE * restrict fp,
+                   const char * restrict fmt, va_list arg);
+extern int vprintf(const char * restrict fmt, va_list arg);
+extern int vscanf(const char * restrict fmt, va_list arg);
+extern int vsnprintf(char * restrict s, size_t n, const char * restrict fmt,
+                     va_list arg);
+extern int vsprintf(char * restrict s,
+                    const char * restrict fmt, va_list arg);
+extern int vsscanf(const char * restrict s,
+                   const char * restrict fmt, va_list arg);
+#endif
+
+extern int fgetc(FILE *fp);
+extern char *fgets(char * restrict s, int n, FILE * restrict fp);
+extern int fputc(int c, FILE *fp);
+extern int fputs(const char * restrict s, FILE * restrict fp);
+extern int getc(FILE *fp);
+extern int getchar(void);
+extern char *gets(char *s);
+extern int putc(int c, FILE *fp);
+extern int putchar(int c);
+extern int puts(const char *s);
+extern int ungetc(int c, FILE *fp);
+extern size_t fread(void * restrict ptr, size_t size, size_t nmemb,
+             FILE * restrict fp);
+extern size_t fwrite(const void * restrict ptr, size_t size, size_t nmemb,
+              FILE * restrict fp);
+extern int fgetpos(FILE * restrict fp, fpos_t * restrict pos);
+extern int fseek(FILE *fp, long int offset, int whence);
+extern int fsetpos(FILE *fp, const fpos_t *pos);
+extern long int ftell(FILE *fp);
+extern void rewind(FILE *fp);
+extern void clearerr(FILE *fp);
+extern int feof(FILE *fp);
+extern int ferror(FILE *fp);
+extern void perror(const char *s);
+
+extern int __getc(FILE *fp);
+extern int __putc(int, FILE *fp);
+
+#ifdef __USE_MACROS
+#ifdef __UNIX_FILES
+#define getc(fp)     ((fp)->rp >= (fp)->wp ?  __getc(fp) : *(fp)->rp++)
+#define putc(c, fp)  ((fp)->wp >= (fp)->rp ? __putc(c,fp) : (*(fp)->wp++ = c))
+#endif
+
+#define ferror(fp)          ((fp)->flags & _IOERR)
+#define feof(fp)            ((fp)->flags & _IOEOF)
+#define clearerr(fp)        (void) ((fp)->flags &= ~(_IOERR|_IOEOF))
+#define getchar()           getc(stdin)
+#define putchar(c)          putc((c), stdout)
+#define setbuf(fp, b)       (void) setvbuf(fp, b, b ? _IOFBF:_IONBF, BUFSIZ)
+#endif
+
+#endif