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get rid of gcc compiler warning

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This commit is contained in:
leitner 2024-02-12 16:41:51 +00:00
parent 365cfb10c5
commit 0d788fb946
1 changed files with 6 additions and 7 deletions
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13
scan/scan_utf8_sem.c
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@ -1,14 +1,13 @@
#include "scan.h" #include "scan.h"
size_t scan_utf8_sem(const char* in,size_t len,uint32_t* num) { size_t scan_utf8_sem(const char* in,size_t len,uint32_t* num) {
size_t r=scan_utf8(in,len,num); uint32_t tmp=0;
size_t r=scan_utf8(in,len,&tmp);
if (r>0) { if (r>0) {
// gcc -fanalyze warns here that we are reading undefined values if (tmp>=0xd800 && tmp<=0xdfff) return 0;
// from *num which is declared as write only. That is a false if ((tmp&0xfffe)==0xfffe) return 0;
// positive because we just called scan_utf8 which writes there. if (tmp>=0xfdd0 && tmp<=0xfdef) return 0;
if (*num>=0xd800 && *num<=0xdfff) return 0; *num=tmp;
if ((*num&0xfffe)==0xfffe) return 0;
if (*num>=0xfdd0 && *num<=0xfdef) return 0;
} }
return r; return r;
} }