Andrew's git - gitweb.git/blob - 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
   9static 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
  18static 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
  45static 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
  53int 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}