Andrew's git - gitweb.git/blob - 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 (!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
  51static 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
  59int 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}