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[core] Decode base64 in a single pass (#20123)

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This commit is contained in:
J. Nick Koston
2026-10-05 10:54:17 -05:00
committed by GitHub
parent 666cf169b9
commit f334b9ea11
2 changed files with 43 additions and 62 deletions
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tests/components/core/test_helpers.cpp
+21
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@@ -281,6 +281,27 @@ TEST(Base64, Rfc4648Vectors) {
}
}
TEST(Base64, DecodeTruncatesToBuffer) {
uint8_t buf[4];
size_t len = base64_decode(std::string("Zm9vYmFy"), buf, sizeof(buf));
EXPECT_EQ(len, 4u);
EXPECT_EQ(memcmp(buf, "foob", 4), 0);
}
TEST(Base64, DecodeStopsAtNonAlphabetChar) {
uint8_t buf[8];
EXPECT_EQ(base64_decode(std::string("Zm9v!Zm9v"), buf, sizeof(buf)), 3u);
EXPECT_EQ(memcmp(buf, "foo", 3), 0);
EXPECT_EQ(base64_decode(std::string("Zm9v Zm9v"), buf, sizeof(buf)), 3u);
EXPECT_EQ(base64_decode(std::string("Zm9v\xC3Zm9v"), buf, sizeof(buf)), 3u);
}
TEST(Base64, DecodeDropsPartialGroup) {
uint8_t buf[8];
EXPECT_EQ(base64_decode(std::string("Z"), buf, sizeof(buf)), 0u);
EXPECT_EQ(base64_decode(std::string("Zm9vY"), buf, sizeof(buf)), 3u);
}
// --- step_to_accuracy_decimals() ---
TEST(StepToAccuracyDecimals, TypicalSteps) {