1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
|
#include <sys/stat.h>
#include <fcntl.h>
#include <stdio.h>
#include <stdlib.h>
#include <unistd.h>
#include "errors.h"
#include "lexer.h"
static char *readfile(const char *, size_t *);
int
main(int argc, char **argv)
{
if (argc != 2) {
fputs("Usage: oryx file\n", stderr);
exit(EXIT_FAILURE);
}
struct {
char *p;
size_t len;
} file;
file.p = readfile(argv[1], &file.len);
struct {
struct lexeme *p;
size_t len;
} toks;
toks.p = lexstring(file.p, file.len, &toks.len);
for (size_t i = 0; i < toks.len; i++) {
struct lexeme l = toks.p[i];
switch (l.kind) {
case LEXIDENT:
printf("Identifier: ‘%.*s’\n", (int)l.len, l.p);
break;
case LEXCOLON: puts("Colon"); break;
case LEXLBRACE: puts("Left brace"); break;
case LEXLPAR: puts("Left parenthesis"); break;
case LEXRBRACE: puts("Right brace"); break;
case LEXRPAR: puts("Right parenthesis"); break;
case LEXSEMI: puts("Semicolon"); break;
case LEXAMP: puts("Ampersand"); break;
case LEXEQ: puts("Equals"); break;
case LEXLANGL: puts("Left angle bracket"); break;
case LEXMINUS: puts("Minus"); break;
case LEXPIPE: puts("Pipe"); break;
case LEXPLUS: puts("Plus"); break;
case LEXRANGL: puts("Right angle bracket"); break;
case LEXSLASH: puts("Slash"); break;
case LEXSTAR: puts("Asterisk"); break;
case LEXTILDE: puts("Tilde"); break;
}
}
#if DEBUG
free(file.p);
free(toks.p);
#endif
return EXIT_SUCCESS;
}
char *
readfile(const char *filename, size_t *n)
{
int fd = open(filename, O_RDONLY);
if (fd == -1)
err("open: %s", filename);
struct stat sb;
if (fstat(fd, &sb) == -1)
err("fstat: %s", filename);
char *p = malloc(sb.st_size + 4);
if (p == NULL)
err("malloc:");
ssize_t nr;
for (size_t off = 0; (nr = read(fd, p + off, sb.st_blksize)) > 0; off += nr)
;
if (nr == -1)
err("read: %s", filename);
for (int i = 0; i < 4; i++)
p[sb.st_size + i] = 0;
*n = sb.st_size;
close(fd);
return p;
}
|
