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Merge pull request #1259 from primo-ppcg/buffer-from-bytes

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Add `buffer/from-bytes`
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Calvin Rose 2023-08-18 07:15:08 -05:00 committed by GitHub
commit f3969b6066
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3 changed files with 26 additions and 3 deletions
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15
src/core/buffer.c
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@ -221,6 +221,20 @@ JANET_CORE_FN(cfun_buffer_new_filled,
return janet_wrap_buffer(buffer);
}
JANET_CORE_FN(cfun_buffer_frombytes,
"(buffer/from-bytes & byte-vals)",
"Creates a buffer from integer parameters with byte values. All integers "
"will be coerced to the range of 1 byte 0-255.") {
int32_t i;
JanetBuffer *buffer = janet_buffer(argc);
for (i = 0; i < argc; i++) {
int32_t c = janet_getinteger(argv, i);
buffer->data[i] = c & 0xFF;
}
buffer->count = argc;
return janet_wrap_buffer(buffer);
}
JANET_CORE_FN(cfun_buffer_fill,
"(buffer/fill buffer &opt byte)",
"Fill up a buffer with bytes, defaulting to 0s. Does not change the buffer's length. "
@ -509,6 +523,7 @@ void janet_lib_buffer(JanetTable *env) {
JanetRegExt buffer_cfuns[] = {
JANET_CORE_REG("buffer/new", cfun_buffer_new),
JANET_CORE_REG("buffer/new-filled", cfun_buffer_new_filled),
JANET_CORE_REG("buffer/from-bytes", cfun_buffer_frombytes),
JANET_CORE_REG("buffer/fill", cfun_buffer_fill),
JANET_CORE_REG("buffer/trim", cfun_buffer_trim),
JANET_CORE_REG("buffer/push-byte", cfun_buffer_u8),

11
test/suite-buffer.janet
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@ -77,6 +77,14 @@
(buffer/push-string b5 "456" @"789")
(assert (= "123456789" (string b5)) "buffer/push-buffer 2")
# Buffer from bytes
(assert (deep= @"" (buffer/from-bytes)) "buffer/from-bytes 1")
(assert (deep= @"ABC" (buffer/from-bytes 65 66 67)) "buffer/from-bytes 2")
(assert (deep= @"0123456789" (buffer/from-bytes ;(range 48 58))) "buffer/from-bytes 3")
(assert (= 0 (length (buffer/from-bytes))) "buffer/from-bytes 4")
(assert (= 5 (length (buffer/from-bytes ;(range 5)))) "buffer/from-bytes 5")
(assert-error "bad slot #1, expected 32 bit signed integer" (buffer/from-bytes :abc))
# some tests for buffer/format
# 029394d
(assert (= (string (buffer/format @"" "pi = %6.3f" math/pi)) "pi = 3.142")
@ -114,8 +122,5 @@
(assert (deep= @"abc423" (buffer/push-at @"abc123" 3 "4"))
"buffer/push-at 3")
# 4782a76
(assert (= 10 (do (var x 10) (def y x) (++ x) y)) "no invalid aliasing")
(end-suite)

3
test/suite-unknown.janet
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@ -292,5 +292,8 @@
[2 6 4 'z]])
"arg & inner symbolmap")
# 4782a76
(assert (= 10 (do (var x 10) (def y x) (++ x) y)) "no invalid aliasing")
(end-suite)