зеркало из https://github.com/github/putty.git
92 строки
2.0 KiB
C
92 строки
2.0 KiB
C
/*
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* fromucs.c - convert Unicode to other character sets.
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*/
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#include "charset.h"
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#include "internal.h"
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struct charset_emit_param {
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char *output;
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int outlen;
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const char *errstr;
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int errlen;
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int stopped;
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};
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static void charset_emit(void *ctx, long int output)
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{
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struct charset_emit_param *param = (struct charset_emit_param *)ctx;
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char outval;
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char const *p;
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int outlen;
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if (output == ERROR) {
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p = param->errstr;
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outlen = param->errlen;
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} else {
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outval = output;
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p = &outval;
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outlen = 1;
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}
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if (param->outlen >= outlen) {
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while (outlen > 0) {
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*param->output++ = *p++;
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param->outlen--;
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outlen--;
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}
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} else {
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param->stopped = 1;
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}
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}
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int charset_from_unicode(wchar_t **input, int *inlen, char *output, int outlen,
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int charset, charset_state *state,
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const char *errstr, int errlen)
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{
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charset_spec const *spec = charset_find_spec(charset);
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charset_state localstate;
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struct charset_emit_param param;
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param.output = output;
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param.outlen = outlen;
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param.stopped = 0;
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/*
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* charset_emit will expect a valid errstr.
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*/
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if (!errstr) {
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/* *shrug* this is good enough, and consistent across all SBCS... */
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param.errstr = ".";
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param.errlen = 1;
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}
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param.errstr = errstr;
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param.errlen = errlen;
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if (!state) {
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localstate.s0 = 0;
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} else {
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localstate = *state; /* structure copy */
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}
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state = &localstate;
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while (*inlen > 0) {
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int lenbefore = param.output - output;
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spec->write(spec, **input, &localstate, charset_emit, ¶m);
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if (param.stopped) {
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/*
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* The emit function has _tried_ to output some
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* characters, but ran up against the end of the
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* buffer. Leave immediately, and return what happened
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* _before_ attempting to process this character.
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*/
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return lenbefore;
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}
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if (state)
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*state = localstate; /* structure copy */
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(*input)++;
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(*inlen)--;
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}
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return param.output - output;
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}
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