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Merge pull request #20483 from maribu/sys/tiny_strerror/llvm

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sys/tiny_strerror: fix compilation on LLVM
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Marian Buschsieweke 2024-03-19 19:38:50 +00:00 committed by GitHub
commit 4caa3bc25e
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1 changed files with 16 additions and 18 deletions
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34
sys/tiny_strerror/tiny_strerror.c
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@ -215,37 +215,35 @@ static FLASH_ATTR const char * FLASH_ATTR const lookup[] = {
const char *tiny_strerror(int errnum)
{
/* dark magic: All error strings start with a "-". For positive error codes
* an offset of 1 is added to the address of the string, jumping one char
* behind the "-". This way the strings do not have to be allocated twice
* (once with and once without minus char).
*/
const char *retval = "-unknown";
unsigned offset = 1;
if (IS_USED(MODULE_TINY_STRERROR_MINIMAL)) {
static char buf[4];
snprintf(buf, sizeof(buf), "%d", errnum);
return buf;
}
/* dark magic: All error strings start with a "-". For positive error codes
* an offset of 1 is added to the address of the string, jumping one char
* behind the "-". This way the strings do not have to be allocated twice
* (once with and once without minus char).
*/
unsigned offset = 1;
if (errnum <= 0) {
offset = 0;
errnum = -errnum;
}
if (((unsigned)errnum < ARRAY_SIZE(lookup))
&& (lookup[(unsigned)errnum] != NULL)) {
retval = lookup[(unsigned)errnum];
if (((unsigned)errnum >= ARRAY_SIZE(lookup))
|| (lookup[(unsigned)errnum] == NULL)) {
return "unknown";
}
if (IS_ACTIVE(HAS_FLASH_UTILS_ARCH)) {
static char buf[16];
flash_strncpy(buf, retval + offset, sizeof(buf));
return buf;
}
return retval + offset;
#if IS_ACTIVE(HAS_FLASH_UTILS_ARCH)
static char buf[16];
flash_strncpy(buf, lookup[(unsigned)errnum] + offset, sizeof(buf));
return buf;
#else
return lookup[(unsigned)errnum] + offset;
#endif
}
#if IS_USED(MODULE_TINY_STRERROR_AS_STRERROR)