Documentation: "rebase <onto> <that>" stays on <that> branch upon exit
[git.git] / test-line-buffer.c
blob25b20b93fd4a1113629c99bd5a53dfee965119c1
1 /*
2 * test-line-buffer.c: code to exercise the svn importer's input helper
3 */
5 #include "git-compat-util.h"
6 #include "strbuf.h"
7 #include "vcs-svn/line_buffer.h"
9 static uint32_t strtouint32(const char *s)
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;
18 static void handle_command(const char *command, const char *arg, struct line_buffer *buf)
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;
30 case 'c':
31 if (!prefixcmp(command, "copy ")) {
32 buffer_copy_bytes(buf, strtouint32(arg));
33 return;
35 case 'r':
36 if (!prefixcmp(command, "read ")) {
37 const char *s = buffer_read_string(buf, strtouint32(arg));
38 fputs(s, stdout);
39 return;
41 case 's':
42 if (!prefixcmp(command, "skip ")) {
43 buffer_skip_bytes(buf, strtouint32(arg));
44 return;
46 default:
47 die("unrecognized command: %s", command);
51 static void handle_line(const char *line, struct line_buffer *stdin_buf)
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);
59 int main(int argc, char *argv[])
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;
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");
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);
84 input = &file_buf;
87 while ((s = buffer_read_line(&stdin_buf)))
88 handle_line(s, input);
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;