1 /*
2 * stdio.h
3 */
4
5 #ifndef _STDIO_H
6 #define _STDIO_H
7
8 #include <klibc/extern.h>
9 #include <stdarg.h>
10 #include <stddef.h>
11
12 /* This structure doesn't really exist, but it gives us something
13 to define FILE * with */
14 struct _IO_file;
15 typedef struct _IO_file FILE;
16
17 #ifndef EOF
18 # define EOF (-1)
19 #endif
20
21 #ifndef BUFSIZ
22 # define BUFSIZ 4096
23 #endif
24
25 #define SEEK_SET 0
26 #define SEEK_CUR 1
27 #define SEEK_END 2
28
29 /*
30 * Convert between a FILE * and a file descriptor. We don't actually
31 * have any in-memory data, so we just abuse the pointer itself to
32 * hold the data. Note, however, that for file descriptors, -1 is
33 * error and 0 is a valid value; for FILE *, NULL (0) is error and
34 * non-NULL are valid.
35 */
fileno(FILE * __f)36 static __inline__ int fileno(FILE * __f)
37 {
38 /* This should really be intptr_t, but size_t should be the same size */
39 return (int)(size_t) __f - 1;
40 }
41
42 /* This is a macro so it can be used as initializer */
43 #define __create_file(__fd) ((FILE *)(size_t)((__fd) + 1))
44
45 #define stdin __create_file(0)
46 #define stdout __create_file(1)
47 #define stderr __create_file(2)
48
49 __extern FILE *fopen(const char *, const char *);
50 struct dev_info;
51 __extern FILE *fopendev(const struct dev_info *, const char *);
52
fdopen(int __fd,const char * __m)53 static __inline__ FILE *fdopen(int __fd, const char *__m)
54 {
55 (void)__m;
56 return __create_file(__fd);
57 }
58
59 __extern int fclose(FILE * __f);
60 __extern int fputs(const char *, FILE *);
61 __extern int puts(const char *);
62 __extern int fputc(int, FILE *);
63 #define putc(c,f) fputc((c),(f))
64 #define putchar(c) fputc((c),stdout)
65
66 __extern int fgetc(FILE *);
67 __extern char *fgets(char *, int, FILE *);
68 #define getc(f) fgetc(f)
69
70 __extern size_t _fread(void *, size_t, FILE *);
71 __extern size_t _fwrite(const void *, size_t, FILE *);
72
73 __extern size_t fread(void *, size_t, size_t, FILE *);
74 __extern size_t fwrite(const void *, size_t, size_t, FILE *);
75
76 #ifndef __NO_FREAD_FWRITE_INLINES
77 #define fread(__p, __s, __n, __f) \
78 ( (__builtin_constant_p(__s) && __s == 1) \
79 ? _fread(__p, __n, __f) \
80 : fread(__p,__s,__n,__f) )
81
82 #define fwrite(__p, __s, __n, __f) \
83 ( (__builtin_constant_p(__s) && __s == 1) \
84 ? _fwrite(__p, __n, __f) \
85 : fwrite(__p,__s,__n,__f) )
86 #endif
87
88 /* No seek, but we can tell */
89 __extern long ftell(FILE *);
90
91 __extern int printf(const char *, ...);
92 __extern int vprintf(const char *, va_list);
93 __extern int fprintf(FILE *, const char *, ...);
94 __extern int vfprintf(FILE *, const char *, va_list);
95 __extern int sprintf(char *, const char *, ...);
96 __extern int vsprintf(char *, const char *, va_list);
97 __extern int snprintf(char *, size_t n, const char *, ...);
98 __extern int vsnprintf(char *, size_t n, const char *, va_list);
99
100 __extern int asprintf(char **, const char *, ...);
101 __extern int vasprintf(char **, const char *, va_list);
102
103 #define mp(f, x...) \
104 printf("[%s()]: " f "\n", __func__,##x)
105 #define mpi() mp("enter")
106 #define mpo() mp("exit")
107
108 /* No buffering, so no flushing needed */
fflush(FILE * __f)109 static __inline__ int fflush(FILE * __f)
110 {
111 (void)__f;
112 return 0;
113 }
114
115 __extern int sscanf(const char *, const char *, ...);
116 __extern int vsscanf(const char *, const char *, va_list);
117
118 __extern void perror(const char *);
119
120 __extern int rename(const char *, const char *);
121
122 /*
123 * unhexchar: Convert a hexadecimal digit to the equivalent number
124 *
125 * Returns 0 if 'data' was converted succesfully, -1 otherwise.
126 */
unhexchar(unsigned char * data)127 static inline int unhexchar(unsigned char *data)
128 {
129 unsigned char num = *data;
130
131 if (num >= '0' && num <= '9') {
132 *data = num - '0';
133 return 0;
134 } else {
135 num |= 0x20; /* upper case -> lower case */
136 if (num >= 'a' && num <= 'f') {
137 *data = num - 'a' + 10;
138 return 0;
139 }
140 }
141
142 return -1;
143 }
144
145 #endif /* _STDIO_H */
146