61 lines
1.3 KiB
C
61 lines
1.3 KiB
C
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/*
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wctrans.c
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7.25.3.2 Extensible wide-character case mapping functions
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Contributed by: Danny Smith <dannysmith@usesr.sourcefoge.net>
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2005-02-24
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This source code is placed in the PUBLIC DOMAIN. It is modified
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from the Q8 package created by Doug Gwyn <gwyn@arl.mil>
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*/
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#include <string.h>
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#include <wctype.h>
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/*
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This differs from the MS implementation of wctrans which
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returns 0 for tolower and 1 for toupper. According to
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C99, a 0 return value indicates invalid input.
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These two function go in the same translation unit so that we
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can ensure that
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towctrans(wc, wctrans("tolower")) == towlower(wc)
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towctrans(wc, wctrans("toupper")) == towupper(wc)
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It also ensures that
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towctrans(wc, wctrans("")) == wc
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which is not required by standard.
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*/
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static const struct {
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const char *name;
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wctrans_t val; } tmap[] = {
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{"tolower", _LOWER},
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{"toupper", _UPPER}
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};
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#define NTMAP (sizeof tmap / sizeof tmap[0])
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wctrans_t
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wctrans (const char* property)
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{
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int i;
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for ( i = 0; i < NTMAP; ++i )
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if (strcmp (property, tmap[i].name) == 0)
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return tmap[i].val;
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return 0;
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}
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wint_t towctrans (wint_t wc, wctrans_t desc)
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{
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switch (desc)
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{
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case _LOWER:
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return towlower (wc);
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case _UPPER:
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return towupper (wc);
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default:
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return wc;
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}
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}
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