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Add string-upcase, string-downcase builtins 

Simple ASCII for now. Add some Unicode smarts later.
This commit is contained in:
Lassi Kortela 2019-08-26 11:47:56 +03:00
parent 41eb286f90
commit 16d409c382
1 changed files with 31 additions and 0 deletions
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31
c/string.c
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@ -292,6 +292,34 @@ value_t builtin_char_downcase(value_t *args, uint32_t nargs)
return mk_wchar(towlower(*(int32_t *)cp_data(cp)));
}
value_t string_map_chars(int (*mapfun)(int), char *os)
{
char *ns;
value_t nv;
size_t n, i;
n = strlen(os);
nv = cvalue_string(n);
ns = cv_data((struct cvalue *)ptr(nv));
memcpy(ns, os, n);
for (i = 0; i < n; i++) {
ns[i] = mapfun(ns[i]);
}
return nv;
}
value_t builtin_string_upcase(value_t *args, uint32_t nargs)
{
argcount("string-upcase", nargs, 1);
return string_map_chars(toupper, tostring(args[0], "string-upcase"));
}
value_t builtin_string_downcase(value_t *args, uint32_t nargs)
{
argcount("string-downcase", nargs, 1);
return string_map_chars(tolower, tostring(args[0], "string-downcase"));
}
value_t builtin_char_alphabetic(value_t *args, uint32_t nargs)
{
struct cprim *cp;
@ -501,6 +529,9 @@ static struct builtinspec stringfunc_info[] = {
{ "char-downcase", builtin_char_downcase },
{ "char-alphabetic?", builtin_char_alphabetic },
{ "string-upcase", builtin_string_upcase },
{ "string-downcase", builtin_string_downcase },
{ "number->string", fl_numbertostring },
{ "string->number", fl_stringtonumber },