d8e5d694d3
Fix #11040 and #9495 bugs with unicode in string-ports Fix other unreported bugs with allocations and garbage collection of string-ports. Obsolete open-input-output-string, a string port of kind input-ouput is no longer supported and the function actually opens a string-port of kind input which cannot be written. Comments and Gimp style in the original TinyScheme code, now in string-port.c Revise tests of string-port. Update TinyScheme README: Discuss more thoroughly the ancestry, and changes from upstream.
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1.4 KiB
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54 lines
No EOL
1.4 KiB
Text
# About ScriptFu's TinyScheme
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This version of TinyScheme has diverged from upstream.
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Upstream is at SourceForge.
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Occasionally fixes upstream are manually backported here.
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## Changes
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These are not upstream:
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1. changes enabling wrapping by ScriptFu
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2. i18n internationalization
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3. unicode via UTF-8
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4. byte type
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5. string-port changes
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## Build differences
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This builds differently from upstream.
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It might not build standalone anymore.
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1. depends on GLib types, superficially
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2. depends on external i18n support
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3. some files have been extracted from the original scheme.c
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4. depends on GLib for unicode support
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## Unicode
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This discussed implementation of unicode in this TinyScheme.
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Scheme strings and string-ports are UTF-8 encoded.
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Each char is one to four bytes.
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Reserved words in the language are still ASCII.
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Symbols may be unicode.
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A string's length is in characters, not bytes.
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Strings, and the contents of string-ports, are internally still NUL-terminated.
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The implementation continues to pass gchar pointers.
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Processing scheme strings may require unicode conversions.
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The string length value stored in a scheme string's data cell is the length in *characters*.
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Most functions taking a string length take the number of characters.
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The number of bytes in a string can be had with libc strlen().
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## Other forks
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Anothers signficant fork of upstream TinyScheme is in the gnupgp project, where it scripts tests. |