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         if (starts_with(command, "binary ")) {
  21                 struct strbuf sb = STRBUF_INIT;
  22                 strbuf_addch(&sb, '>');
  23                 buffer_read_binary(buf, &sb, strtouint32(arg));
  24                 fwrite(sb.buf, 1, sb.len, stdout);
  25                 strbuf_release(&sb);
  26         } else if (starts_with(command, "copy ")) {
  27                 buffer_copy_bytes(buf, strtouint32(arg));
  28         } else if (starts_with(command, "skip ")) {
  29                 buffer_skip_bytes(buf, strtouint32(arg));
  30         } else {
  31                 die("unrecognized command: %s", command);
  32         }
  33 }
  34
  35 static void handle_line(const char *line, struct line_buffer *stdin_buf)
  36 {
  37         const char *arg = strchr(line, ' ');
  38         if (!arg)
  39                 die("no argument in line: %s", line);
  40         handle_command(line, arg + 1, stdin_buf);
  41 }
  42
  43 int cmd_main(int argc, const char **argv)
  44 {
  45         struct line_buffer stdin_buf = LINE_BUFFER_INIT;
  46         struct line_buffer file_buf = LINE_BUFFER_INIT;
  47         struct line_buffer *input = &stdin_buf;
  48         const char *filename;
  49         char *s;
  50
  51         if (argc == 1)
  52                 filename = NULL;
  53         else if (argc == 2)
  54                 filename = argv[1];
  55         else
  56                 usage("test-line-buffer [file | &fd] < script");
  57
  58         if (buffer_init(&stdin_buf, NULL))
  59                 die_errno("open error");
  60         if (filename) {
  61                 if (*filename == '&') {
  62                         if (buffer_fdinit(&file_buf, strtouint32(filename + 1)))
  63                                 die_errno("error opening fd %s", filename + 1);
  64                 } else {
  65                         if (buffer_init(&file_buf, filename))
  66                                 die_errno("error opening %s", filename);
  67                 }
  68                 input = &file_buf;
  69         }
  70
  71         while ((s = buffer_read_line(&stdin_buf)))
  72                 handle_line(s, input);
  73
  74         if (filename && buffer_deinit(&file_buf))
  75                 die("error reading from %s", filename);
  76         if (buffer_deinit(&stdin_buf))
  77                 die("input error");
  78         if (ferror(stdout))
  79                 die("output error");
  80         return 0;
  81 }