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 }