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41 lines
1.5 KiB
C
41 lines
1.5 KiB
C
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// 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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#ifndef MACOS_PSTRBUILDER_H
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#define MACOS_PSTRBUILDER_H
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#include "lib/defs.h"
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/*
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Pascal String Builder
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=====================
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These functions operate on the Pascal-style Str255 string type, which consists
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of a length byte, followed by 0-255 characters of text. Pascal string literals
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can be written by putting \p at the beginning of the literal (this is a C
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extension), and have an unsigned char type. C-style strings (null-terminated,
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char type) are not used.
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The functions here construct strings for human consumption only, not
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machine-readable strings. Strings which overflow the destination buffer are
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silently truncated, with an ellipsis added to the end of the buffer to show that
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it’s been truncated.
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*/
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// A PStrBuilder is a buffer for writing a string. This should be initialized by
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// setting data[0] to 0 and truncated to false.
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struct PStrBuilder {
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unsigned char data[256];
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Boolean truncated;
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};
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// PStrAppend appends a string to the buffer.
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void PStrAppend(struct PStrBuilder *buf, const unsigned char *src);
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// PStrAppendSubstitute appends a Pascal string to another string, expanding any
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// ^N substitutions, where N is a positive digit, 1-9.
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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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#endif
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