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git://jb55.com/damus
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97f10e865f
NostrScript is a WebAssembly implementation that interacts with Damus. It enables dynamic scripting that can be used to power custom list views, enabling pluggable algorithms. The web has JavaScript, Damus has NostrScript. NostrScripts can be written in any language that compiles to WASM. This commit adds a WASM interpreter I've written as a mostly-single C file for portability and embeddability. In the future we could JIT-compile these for optimal performance if NostrScripts get large and complicated. For now an interpreter is simple enough for algorithm list view plugins. Changelog-Added: Add initial NostrScript implementation Signed-off-by: William Casarin <jb55@jb55.com>
43 lines
748 B
C
43 lines
748 B
C
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#ifndef CURSOR_PARSER
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#define CURSOR_PARSER
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#include "cursor.h"
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static int consume_bytes(struct cursor *cursor, const unsigned char *match, int len)
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{
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int i;
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if (cursor->p + len > cursor->end) {
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fprintf(stderr, "consume_bytes overflow\n");
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return 0;
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}
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for (i = 0; i < len; i++) {
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if (cursor->p[i] != match[i])
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return 0;
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}
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cursor->p += len;
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return 1;
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}
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static inline int consume_byte(struct cursor *cursor, unsigned char match)
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{
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if (unlikely(cursor->p >= cursor->end))
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return 0;
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if (*cursor->p != match)
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return 0;
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cursor->p++;
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return 1;
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}
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static inline int consume_u32(struct cursor *cursor, unsigned int match)
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{
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return consume_bytes(cursor, (unsigned char*)&match, sizeof(match));
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}
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#endif /* CURSOR_PARSER */
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