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/*
\fucref{fun\_str\_el}{void fun\_str\_el ()}
{}
{}
{}
{}
{funstrel.c}
{
This function is called when an {\em op\_str\_el} opcode is enountered.
The last pushed value is interpreted as a string, the one but last
pushed value as an index.
The return register {\em reg} is set to an {\em e\_str} variable:
the character from the string at index {\em index}, terminated by
$\backslash$0. If index is smaller than 0 or larger than the size of
the string, {\em reg} holds a null-character.
}
*/
#include "builtin.ih"
static char buf[2];
void fun_str_el ()
{
size_t index = intValue(top());
char const *str = stringStr(top() - 1);
buf[0] = index >= strlen(str) ? 0 : str[index];
reg = stringConstructor_cP(buf);;
}
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