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/* SPDX-License-Identifier: LGPL-2.1-or-later */
#include <fnmatch.h>
#include "compare-operator.h"
#include "string-util.h"
CompareOperator parse_compare_operator(const char **s, CompareOperatorParseFlags flags) {
static const struct {
CompareOperator op;
const char *str;
CompareOperatorParseFlags valid_mask; /* If this operator appears when flags in mask not set, fail */
CompareOperatorParseFlags need_mask; /* Skip over this operattor when flags in mask not set */
} table[] = {
{ COMPARE_FNMATCH_EQUAL, "$=", .valid_mask = COMPARE_ALLOW_FNMATCH },
{ COMPARE_FNMATCH_UNEQUAL, "!$=", .valid_mask = COMPARE_ALLOW_FNMATCH },
{ COMPARE_UNEQUAL, "<>" },
{ COMPARE_LOWER_OR_EQUAL, "<=" },
{ COMPARE_GREATER_OR_EQUAL, ">=" },
{ COMPARE_LOWER, "<" },
{ COMPARE_GREATER, ">" },
{ COMPARE_EQUAL, "==" },
{ COMPARE_STRING_EQUAL, "=", .need_mask = COMPARE_EQUAL_BY_STRING },
{ COMPARE_EQUAL, "=" },
{ COMPARE_STRING_UNEQUAL, "!=", .need_mask = COMPARE_EQUAL_BY_STRING },
{ COMPARE_UNEQUAL, "!=" },
{ COMPARE_LOWER, "lt", .valid_mask = COMPARE_ALLOW_TEXTUAL },
{ COMPARE_LOWER_OR_EQUAL, "le", .valid_mask = COMPARE_ALLOW_TEXTUAL },
{ COMPARE_EQUAL, "eq", .valid_mask = COMPARE_ALLOW_TEXTUAL },
{ COMPARE_UNEQUAL, "ne", .valid_mask = COMPARE_ALLOW_TEXTUAL },
{ COMPARE_GREATER_OR_EQUAL, "ge", .valid_mask = COMPARE_ALLOW_TEXTUAL },
{ COMPARE_GREATER, "gt", .valid_mask = COMPARE_ALLOW_TEXTUAL },
};
assert(s);
if (!*s) /* Hmm, we already reached the end, for example because extract_first_word() and
* parse_compare_operator() are use on the same string? */
return _COMPARE_OPERATOR_INVALID;
for (size_t i = 0; i < ELEMENTSOF(table); i ++) {
const char *e;
if (table[i].need_mask != 0 && !FLAGS_SET(flags, table[i].need_mask))
continue;
e = startswith(*s, table[i].str);
if (e) {
if (table[i].valid_mask != 0 && !FLAGS_SET(flags, table[i].valid_mask))
return _COMPARE_OPERATOR_INVALID;
*s = e;
return table[i].op;
}
}
return _COMPARE_OPERATOR_INVALID;
}
int test_order(int k, CompareOperator op) {
switch (op) {
case COMPARE_LOWER:
return k < 0;
case COMPARE_LOWER_OR_EQUAL:
return k <= 0;
case COMPARE_EQUAL:
return k == 0;
case COMPARE_UNEQUAL:
return k != 0;
case COMPARE_GREATER_OR_EQUAL:
return k >= 0;
case COMPARE_GREATER:
return k > 0;
default:
return -EINVAL;
}
}
int version_or_fnmatch_compare(
CompareOperator op,
const char *a,
const char *b) {
int r;
switch (op) {
case COMPARE_STRING_EQUAL:
return streq_ptr(a, b);
case COMPARE_STRING_UNEQUAL:
return !streq_ptr(a, b);
case COMPARE_FNMATCH_EQUAL:
r = fnmatch(b, a, 0);
return r == 0 ? true :
r == FNM_NOMATCH ? false : -EINVAL;
case COMPARE_FNMATCH_UNEQUAL:
r = fnmatch(b, a, 0);
return r == FNM_NOMATCH ? true:
r == 0 ? false : -EINVAL;
case _COMPARE_OPERATOR_ORDER_FIRST..._COMPARE_OPERATOR_ORDER_LAST:
return test_order(strverscmp_improved(a, b), op);
default:
return -EINVAL;
}
}
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