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
getchar(void)28 int getchar(void)
29 {
30 unsigned int c;
31 read(0, &c, 1);
32 return c;
33 }
34
puts(const char * s)35 int puts(const char *s)
36 {
37 return put_string(s, COLOR_WHITE, COLOR_BLACK);
38 }
39
putchar(int c)40 int putchar(int c)
41 {
42 return printf("%c", (char)c);
43 }
44
fflush(FILE * stream)45 int fflush(FILE *stream)
46 {
47 return 0;
48 }
49
ferror(FILE * stream)50 int ferror(FILE *stream)
51 {
52 return 0;
53 }
54
fclose(FILE * stream)55 int fclose(FILE *stream)
56 {
57 int retval = close(stream->fd);
58 if (retval)
59 return retval;
60 if (stream->fd >= 3)
61 free(stream);
62
63 return 0;
64 }
65
66 // FIXME:
67 // 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)68 FILE *fopen(const char *restrict pathname, const char *restrict mode)
69 {
70 FILE *stream = malloc(sizeof(FILE));
71 memset(stream, 0, sizeof(FILE));
72 int o_flags = 0;
73
74 if (strcmp(mode, "r") == 0)
75 o_flags = O_RDONLY;
76 else if (strcmp(mode, "r+") == 0)
77 o_flags = O_RDWR;
78 else if (strcmp(mode, "w") == 0)
79 o_flags = O_WRONLY;
80 else if (strcmp(mode, "w+") == 0)
81 o_flags = O_RDWR | O_CREAT;
82 else if (strcmp(mode, "a") == 0)
83 o_flags = O_APPEND | O_CREAT;
84 else if (strcmp(mode, "a+") == 0)
85 o_flags = O_APPEND | O_CREAT;
86
87 int fd = open(pathname, o_flags);
88 if (fd >= 0)
89 stream->fd = fd;
90 return stream;
91 }
92