On Fri, Oct 5, 2018 at 3:12 PM Tom Lane <t...@sss.pgh.pa.us> wrote: > Here's a draft patch against HEAD for this.
+ * Invert the sign of a qsort-style comparison result, ie, exchange negative + * and positive integer values, being careful not to get the wrong answer + * for INT_MIN. The argument should be an integral variable. + */ +#define INVERT_SIGN(var) \ + ((var) = ((var) < 0) ? 1 : -(var)) I suppose someone might mistake this for a function that converts -42 to 42... would something like INVERT_COMPARE_RESULT() be better? -- Thomas Munro http://www.enterprisedb.com
