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use_index now requires libmswstr. See #215 and #226

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Print a warning if use_index is turned on but libmswstr is not found.  I
suppose we could enable indexes only on JET3 databases, but I am not at
all confident in the JET3 index logic, as it seems to break on non-ASCII
input. So I'd rather just print this warning and require some
hoop-jumping.
This commit is contained in:
Evan Miller 2020-12-29 13:13:25 -05:00
parent 0ad6fb33f6
commit 197c3dc35a
1 changed files with 7 additions and 1 deletions
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8
src/libmdb/options.c
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@ -55,7 +55,13 @@ load_options()
if (!optset && (s=getenv("MDBOPTS"))) { if (!optset && (s=getenv("MDBOPTS"))) {
opt = strtok_r(s, ":", &ctx); opt = strtok_r(s, ":", &ctx);
while (opt) { while (opt) {
if (!strcmp(opt, "use_index")) opts |= MDB_USE_INDEX; if (!strcmp(opt, "use_index")) {
#ifdef HAVE_LIBMSWSTR
opts |= MDB_USE_INDEX;
#else
fprintf(stderr, "The 'use_index' argument was supplied to MDBOPTS environment variable. However, this feature requires the libmswstr library, which was not found when libmdb was compiled. As a result, the 'use_index' argument will be ignored.\n\nTo enable indexes, you will need to download libmswstr from https://github.com/leecher1337/libmswstr and then recompile libmdb. Note that the 'use_index' feature is largely untested, and may have unexpected results.\n\nTo suppress this warning, run the program again after removing the 'use_index' argument from the MDBOPTS environment variable.\n");
#endif
}
if (!strcmp(opt, "no_memo")) opts |= MDB_NO_MEMO; if (!strcmp(opt, "no_memo")) opts |= MDB_NO_MEMO;
if (!strcmp(opt, "debug_like")) opts |= MDB_DEBUG_LIKE; if (!strcmp(opt, "debug_like")) opts |= MDB_DEBUG_LIKE;
if (!strcmp(opt, "debug_write")) opts |= MDB_DEBUG_WRITE; if (!strcmp(opt, "debug_write")) opts |= MDB_DEBUG_WRITE;