Merge branch 'mg/name-rev-tests-with-short-stack'
[git] / t / helper / 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 (starts_with(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 (starts_with(command, "copy ")) {
32                         buffer_copy_bytes(buf, strtouint32(arg));
33                         return;
34                 }
35         case 's':
36                 if (starts_with(command, "skip ")) {
37                         buffer_skip_bytes(buf, strtouint32(arg));
38                         return;
39                 }
40         default:
41                 die("unrecognized command: %s", command);
42         }
43 }
44
45 static void handle_line(const char *line, struct line_buffer *stdin_buf)
46 {
47         const char *arg = strchr(line, ' ');
48         if (!arg)
49                 die("no argument in line: %s", line);
50         handle_command(line, arg + 1, stdin_buf);
51 }
52
53 int cmd_main(int argc, const char **argv)
54 {
55         struct line_buffer stdin_buf = LINE_BUFFER_INIT;
56         struct line_buffer file_buf = LINE_BUFFER_INIT;
57         struct line_buffer *input = &stdin_buf;
58         const char *filename;
59         char *s;
60
61         if (argc == 1)
62                 filename = NULL;
63         else if (argc == 2)
64                 filename = argv[1];
65         else
66                 usage("test-line-buffer [file | &fd] < script");
67
68         if (buffer_init(&stdin_buf, NULL))
69                 die_errno("open error");
70         if (filename) {
71                 if (*filename == '&') {
72                         if (buffer_fdinit(&file_buf, strtouint32(filename + 1)))
73                                 die_errno("error opening fd %s", filename + 1);
74                 } else {
75                         if (buffer_init(&file_buf, filename))
76                                 die_errno("error opening %s", filename);
77                 }
78                 input = &file_buf;
79         }
80
81         while ((s = buffer_read_line(&stdin_buf)))
82                 handle_line(s, input);
83
84         if (filename && buffer_deinit(&file_buf))
85                 die("error reading from %s", filename);
86         if (buffer_deinit(&stdin_buf))
87                 die("input error");
88         if (ferror(stdout))
89                 die("output error");
90         return 0;
91 }