Merge branch 'svn-fe' of git://repo.or.cz/git/jrn
[git] / test-line-buffer.c
1 /*
2  * test-line-buffer.c: code to exercise the svn importer's input helper
3  */
4
5 #include "git-compat-util.h"
6 #include "strbuf.h"
7 #include "vcs-svn/line_buffer.h"
8
9 static uint32_t strtouint32(const char *s)
10 {
11         char *end;
12         uintmax_t n = strtoumax(s, &end, 10);
13         if (*s == '\0' || *end != '\0')
14                 die("invalid count: %s", s);
15         return (uint32_t) n;
16 }
17
18 static void handle_command(const char *command, const char *arg, struct line_buffer *buf)
19 {
20         switch (*command) {
21         case 'b':
22                 if (!prefixcmp(command, "binary ")) {
23                         struct strbuf sb = STRBUF_INIT;
24                         strbuf_addch(&sb, '>');
25                         buffer_read_binary(buf, &sb, strtouint32(arg));
26                         fwrite(sb.buf, 1, sb.len, stdout);
27                         strbuf_release(&sb);
28                         return;
29                 }
30         case 'c':
31                 if (!prefixcmp(command, "copy ")) {
32                         buffer_copy_bytes(buf, strtouint32(arg));
33                         return;
34                 }
35         case 'r':
36                 if (!prefixcmp(command, "read ")) {
37                         const char *s = buffer_read_string(buf, strtouint32(arg));
38                         fputs(s, stdout);
39                         return;
40                 }
41         case 's':
42                 if (!prefixcmp(command, "skip ")) {
43                         buffer_skip_bytes(buf, strtouint32(arg));
44                         return;
45                 }
46         default:
47                 die("unrecognized command: %s", command);
48         }
49 }
50
51 static void handle_line(const char *line, struct line_buffer *stdin_buf)
52 {
53         const char *arg = strchr(line, ' ');
54         if (!arg)
55                 die("no argument in line: %s", line);
56         handle_command(line, arg + 1, stdin_buf);
57 }
58
59 int main(int argc, char *argv[])
60 {
61         struct line_buffer stdin_buf = LINE_BUFFER_INIT;
62         struct line_buffer file_buf = LINE_BUFFER_INIT;
63         struct line_buffer *input = &stdin_buf;
64         const char *filename;
65         char *s;
66
67         if (argc == 1)
68                 filename = NULL;
69         else if (argc == 2)
70                 filename = argv[1];
71         else
72                 usage("test-line-buffer [file | &fd] < script");
73
74         if (buffer_init(&stdin_buf, NULL))
75                 die_errno("open error");
76         if (filename) {
77                 if (*filename == '&') {
78                         if (buffer_fdinit(&file_buf, strtouint32(filename + 1)))
79                                 die_errno("error opening fd %s", filename + 1);
80                 } else {
81                         if (buffer_init(&file_buf, filename))
82                                 die_errno("error opening %s", filename);
83                 }
84                 input = &file_buf;
85         }
86
87         while ((s = buffer_read_line(&stdin_buf)))
88                 handle_line(s, input);
89
90         if (filename && buffer_deinit(&file_buf))
91                 die("error reading from %s", filename);
92         if (buffer_deinit(&stdin_buf))
93                 die("input error");
94         if (ferror(stdout))
95                 die("output error");
96         buffer_reset(&stdin_buf);
97         return 0;
98 }