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 's':
  36                 if (!prefixcmp(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 main(int argc, 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 }