73 lines
1.8 KiB
C
73 lines
1.8 KiB
C
// Copyright 2022-2023 Dietrich Epp.
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// This file is part of SyncFiles. SyncFiles is licensed under the terms of the
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// Mozilla Public License, version 2.0. See LICENSE.txt for details.
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#include "macos/pstrbuilder.h"
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#include <string.h>
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static void PStrAppendMem(struct PStrBuilder *buf, const unsigned char *src,
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int slen)
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{
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int dlen;
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if (slen == 0 || buf->truncated) {
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return;
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}
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dlen = buf->data[0];
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if (slen + dlen > 255) {
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// Too long, truncate.
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// FIXME: Handle other scripts:
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// - Truncation should respect multibyte character boundaries.
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// - Ellipsis should be taken from internationalization table.
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slen = 255 - dlen;
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memcpy(buf->data + 1 + dlen, src, slen);
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dlen += slen;
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if (dlen >= 255) {
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dlen = 254;
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}
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buf->data[1 + dlen] = 0xc9; // 0xc9 is ellipsis.
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dlen++;
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buf->data[0] = dlen;
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buf->truncated = true;
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return;
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}
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memcpy(buf->data + 1 + dlen, src, slen);
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buf->data[0] = dlen + slen;
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}
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void PStrAppend(struct PStrBuilder *buf, const unsigned char *src)
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{
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PStrAppendMem(buf, src + 1, src[0]);
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}
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void PStrAppendSubstitute(struct PStrBuilder *buf, const unsigned char *src,
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int paramcount, const unsigned char *const *params)
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{
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int srclen, srcpos, start, ch;
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const unsigned char *param;
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srclen = src[0];
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srcpos = 1;
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start = 1;
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while (srcpos <= srclen) {
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if (src[srcpos] == '^' && srcpos + 1 <= srclen) {
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ch = src[srcpos + 1];
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if ('1' <= ch && ch <= '9') {
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ch -= '1';
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if (ch < paramcount && (param = params[ch]) != NULL) {
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PStrAppendMem(buf, src + start, srcpos - start);
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param = params[ch];
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PStrAppendMem(buf, param + 1, param[0]);
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srcpos += 2;
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start = srcpos;
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} else {
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srcpos += 2;
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}
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continue;
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}
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}
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srcpos++;
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}
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PStrAppendMem(buf, src + start, srcpos - start);
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}
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