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🐛 bug fix

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This commit is contained in:
ValKmjolnir
2022-05-06 20:58:02 +08:00
parent fd8a148d0c
commit 23a5c1b1ad
7 changed files with 31 additions and 21 deletions
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nasal_builtin.h
+7 -5
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@@ -671,12 +671,14 @@ nasal_ref builtin_substr(nasal_ref* local,nasal_gc& gc)
return builtin_err("substr","\"begin\" must be number");
if(len.type!=vm_num)
return builtin_err("substr","\"length\" must be number");
int begin=(int)beg.num();
int length=(int)len.num();
if(begin>=str.str().length() || begin+length-1>=str.str().length())
if(beg.num()<0)
return builtin_err("substr","\"begin\" should be greater than or equal to zero");
if(len.num()<0)
return builtin_err("substr","\"length\" should be greater than or equal to zero");
size_t begin=(size_t)beg.num();
size_t length=(size_t)len.num();
if(begin>=str.str().length() || begin+length>str.str().length())
return builtin_err("susbtr","index out of range");
if(length<0)
length=0;
nasal_ref ret=gc.alloc(vm_str);
ret.str()=str.str().substr(begin,length);
return ret;