1 #include <fcntl.h>
2 #include <stdio.h>
3 #include <stdlib.h>
4 #include <string.h>
5 #include <unistd.h>
6
fprintf(FILE * restrict stream,const char * restrict format,...)7 int fprintf(FILE *restrict stream, const char *restrict format, ...)
8 {
9 const int bufsize = 65536 * 2;
10 char *buf = malloc(bufsize);
11 memset(buf, 0, bufsize);
12 va_list args;
13
14 va_start(args, format);
15 vsprintf(buf, format, args);
16 va_end(args);
17
18 int len = strlen(buf);
19 if (len > bufsize - 1)
20 {
21 len = bufsize - 1;
22 buf[bufsize - 1] = 0;
23 }
24 write(stream->fd, buf, len);
25 free(buf);
26 }
27
puts(const char * s)28 int puts(const char *s)
29 {
30 return put_string(s, COLOR_WHITE, COLOR_BLACK);
31 }
32
putchar(int c)33 int putchar(int c)
34 {
35 return printf("%c", (char)c);
36 }
37
fflush(FILE * stream)38 int fflush(FILE *stream)
39 {
40 return 0;
41 }
42
ferror(FILE * stream)43 int ferror(FILE *stream)
44 {
45 return 0;
46 }
47
fclose(FILE * stream)48 int fclose(FILE *stream)
49 {
50 if (stream->fd >= 3)
51 {
52 int retcval = close(stream->fd);
53 free(stream);
54 return 0;
55 }
56 else
57 return 0;
58 }
59
60 // FIXME: 请注意，这个函数的实现，没有遵照posix，行为也与Linux的不一致，请在将来用Rust重构时改变它，以使得它的行为与Linux的一致。
fopen(const char * restrict pathname,const char * restrict mode)61 FILE *fopen(const char *restrict pathname, const char *restrict mode)
62 {
63 FILE *stream = malloc(sizeof(FILE));
64 memset(stream, 0, sizeof(FILE));
65 int o_flags = 0;
66
67 if (strcmp(mode, "r") == 0)
68 o_flags = O_RDONLY;
69 else if (strcmp(mode, "r+") == 0)
70 o_flags = O_RDWR;
71 else if (strcmp(mode, "w") == 0)
72 o_flags = O_WRONLY;
73 else if (strcmp(mode, "w+") == 0)
74 o_flags = O_RDWR | O_CREAT;
75 else if (strcmp(mode, "a") == 0)
76 o_flags = O_APPEND | O_CREAT;
77 else if (strcmp(mode, "a+") == 0)
78 o_flags = O_APPEND | O_CREAT;
79
80 int fd = open(pathname, o_flags);
81 if (fd >= 0)
82 stream->fd = fd;
83 return stream;
84 }
85