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From 2fd9a21a8b6a93c4fb2747839766adca15faa008 Mon Sep 17 00:00:00 2001
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From: Lennart Poettering <lennart@poettering.net>
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Date: Thu, 14 Nov 2019 14:49:40 +0100
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Subject: [PATCH] parse-util: sometimes it is useful to check if a string is a
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valid integer, but not actually parse it
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(cherry picked from commit 22810041c2200fe72b0e0c985d0e404f8b80f9e2)
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Related: #1848373
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---
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src/basic/parse-util.c | 34 ++++++++++++++++++++--------------
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1 file changed, 20 insertions(+), 14 deletions(-)
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diff --git a/src/basic/parse-util.c b/src/basic/parse-util.c
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index 6becf85878..056e56765e 100644
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--- a/src/basic/parse-util.c
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+++ b/src/basic/parse-util.c
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@@ -383,7 +383,6 @@ int safe_atou_full(const char *s, unsigned base, unsigned *ret_u) {
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unsigned long l;
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assert(s);
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- assert(ret_u);
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assert(base <= 16);
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/* strtoul() is happy to parse negative values, and silently
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@@ -407,7 +406,9 @@ int safe_atou_full(const char *s, unsigned base, unsigned *ret_u) {
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if ((unsigned long) (unsigned) l != l)
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return -ERANGE;
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- *ret_u = (unsigned) l;
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+ if (ret_u)
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+ *ret_u = (unsigned) l;
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+
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return 0;
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}
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@@ -416,7 +417,6 @@ int safe_atoi(const char *s, int *ret_i) {
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long l;
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assert(s);
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- assert(ret_i);
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errno = 0;
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l = strtol(s, &x, 0);
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@@ -427,7 +427,9 @@ int safe_atoi(const char *s, int *ret_i) {
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if ((long) (int) l != l)
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return -ERANGE;
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- *ret_i = (int) l;
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+ if (ret_i)
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+ *ret_i = (int) l;
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+
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return 0;
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}
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@@ -436,7 +438,6 @@ int safe_atollu(const char *s, long long unsigned *ret_llu) {
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unsigned long long l;
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assert(s);
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- assert(ret_llu);
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s += strspn(s, WHITESPACE);
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@@ -449,7 +450,9 @@ int safe_atollu(const char *s, long long unsigned *ret_llu) {
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if (*s == '-')
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return -ERANGE;
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- *ret_llu = l;
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+ if (ret_llu)
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+ *ret_llu = l;
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+
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return 0;
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}
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@@ -458,7 +461,6 @@ int safe_atolli(const char *s, long long int *ret_lli) {
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long long l;
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assert(s);
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- assert(ret_lli);
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errno = 0;
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l = strtoll(s, &x, 0);
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@@ -467,7 +469,9 @@ int safe_atolli(const char *s, long long int *ret_lli) {
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if (!x || x == s || *x != 0)
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return -EINVAL;
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- *ret_lli = l;
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+ if (ret_lli)
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+ *ret_lli = l;
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+
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return 0;
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}
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@@ -476,7 +480,6 @@ int safe_atou8(const char *s, uint8_t *ret) {
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unsigned long l;
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assert(s);
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- assert(ret);
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s += strspn(s, WHITESPACE);
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@@ -491,7 +494,8 @@ int safe_atou8(const char *s, uint8_t *ret) {
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if ((unsigned long) (uint8_t) l != l)
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return -ERANGE;
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- *ret = (uint8_t) l;
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+ if (ret)
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+ *ret = (uint8_t) l;
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return 0;
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}
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@@ -525,7 +529,6 @@ int safe_atoi16(const char *s, int16_t *ret) {
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long l;
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assert(s);
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- assert(ret);
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errno = 0;
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l = strtol(s, &x, 0);
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@@ -536,7 +539,9 @@ int safe_atoi16(const char *s, int16_t *ret) {
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if ((long) (int16_t) l != l)
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return -ERANGE;
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- *ret = (int16_t) l;
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+ if (ret)
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+ *ret = (int16_t) l;
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+
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return 0;
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}
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@@ -546,7 +551,6 @@ int safe_atod(const char *s, double *ret_d) {
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double d = 0;
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assert(s);
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- assert(ret_d);
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loc = newlocale(LC_NUMERIC_MASK, "C", (locale_t) 0);
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if (loc == (locale_t) 0)
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@@ -559,7 +563,9 @@ int safe_atod(const char *s, double *ret_d) {
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if (!x || x == s || *x != 0)
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return -EINVAL;
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- *ret_d = (double) d;
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+ if (ret_d)
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+ *ret_d = (double) d;
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+
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return 0;
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}
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