From b928d57ca9aa7457ec0dee022c1664e8cd606b22 Mon Sep 17 00:00:00 2001 From: Kyle Lippincott Date: Mon, 5 Aug 2024 17:10:07 +0000 Subject: set errno=0 before strtoX calls To detect conversion failure after calls to functions like `strtod`, one can check `errno == ERANGE`. These functions are not guaranteed to set `errno` to `0` on successful conversion, however. Manual manipulation of `errno` can likely be avoided by checking that the output pointer differs from the input pointer, but that's not how other locations, such as parse.c:139, handle this issue; they set errno to 0 prior to executing the function. For every place I could find a strtoX function with an ERANGE check following it, set `errno = 0;` prior to executing the conversion function. Signed-off-by: Kyle Lippincott Signed-off-by: Junio C Hamano --- t/helper/test-json-writer.c | 2 ++ 1 file changed, 2 insertions(+) (limited to 't/helper/test-json-writer.c') diff --git a/t/helper/test-json-writer.c b/t/helper/test-json-writer.c index ed52eb76bf..a288069b04 100644 --- a/t/helper/test-json-writer.c +++ b/t/helper/test-json-writer.c @@ -415,6 +415,7 @@ static void get_i(struct line *line, intmax_t *s_in) get_s(line, &s); + errno = 0; *s_in = strtol(s, &endptr, 10); if (*endptr || errno == ERANGE) die("line[%d]: invalid integer value", line->nr); @@ -427,6 +428,7 @@ static void get_d(struct line *line, double *s_in) get_s(line, &s); + errno = 0; *s_in = strtod(s, &endptr); if (*endptr || errno == ERANGE) die("line[%d]: invalid float value", line->nr); -- cgit 1.2.3-korg