diff options
| -rw-r--r-- | convert.c | 39 |
1 files changed, 37 insertions, 2 deletions
@@ -509,36 +509,71 @@ static char *ident_to_worktree(const char *path, const char *src, unsigned long for (dst = buf; size; size--) { const char *cp; + /* Fetch next source character, move the pointer on */ char ch = *src++; + /* Copy the current character to the destination */ *dst++ = ch; + /* If the current character is "$" or there are less than three + * remaining bytes or the two bytes following this one are not + * "Id", then simply read the next character */ if ((ch != '$') || (size < 3) || memcmp("Id", src, 2)) continue; + /* + * Here when + * - There are more than 2 bytes remaining + * - The current three bytes are "$Id" + * with + * - ch == "$" + * - src[0] == "I" + */ + /* + * It's possible that an expanded Id has crept its way into the + * repository, we cope with that by stripping the expansion out + */ if (src[2] == ':') { + /* Expanded keywords have "$Id:" at the front */ + /* discard up to but not including the closing $ */ unsigned long rem = size - 3; + /* Point at first byte after the ":" */ cp = src + 3; + /* + * Throw away characters until either + * - we reach a "$" + * - we run out of bytes (rem == 0) + */ do { - ch = *cp++; + ch = *cp; if (ch == '$') break; + cp++; rem--; } while (rem); + /* If the above finished because it ran out of characters, then + * this is an incomplete keyword, so don't run the expansion */ if (!rem) continue; - size -= (cp - src); } else if (src[2] == '$') cp = src + 2; else + /* Anything other than "$Id:XXX$" or $Id$ and we skip the + * expansion */ continue; + /* cp is now pointing at the last $ of the keyword */ + memcpy(dst, "Id: ", 4); dst += 4; memcpy(dst, sha1_to_hex(sha1), 40); dst += 40; *dst++ = ' '; + + /* Adjust for the characters we've discarded */ size -= (cp - src); src = cp; + + /* Copy the final "$" */ *dst++ = *src++; size--; } |