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Diffstat (limited to '')
-rw-r--r-- | src/third-party/base64/lib/arch/generic/dec_head.c | 37 |
1 files changed, 37 insertions, 0 deletions
diff --git a/src/third-party/base64/lib/arch/generic/dec_head.c b/src/third-party/base64/lib/arch/generic/dec_head.c new file mode 100644 index 0000000..179a31b --- /dev/null +++ b/src/third-party/base64/lib/arch/generic/dec_head.c @@ -0,0 +1,37 @@ +int ret = 0; +const uint8_t *s = (const uint8_t *) src; +uint8_t *o = (uint8_t *) out; +uint8_t q; + +// Use local temporaries to avoid cache thrashing: +size_t olen = 0; +size_t slen = srclen; +struct base64_state st; +st.eof = state->eof; +st.bytes = state->bytes; +st.carry = state->carry; + +// If we previously saw an EOF or an invalid character, bail out: +if (st.eof) { + *outlen = 0; + ret = 0; + // If there was a trailing '=' to check, check it: + if (slen && (st.eof == BASE64_AEOF)) { + state->bytes = 0; + state->eof = BASE64_EOF; + ret = ((base64_table_dec_8bit[*s++] == 254) && (slen == 1)) ? 1 : 0; + } + return ret; +} + +// Turn four 6-bit numbers into three bytes: +// out[0] = 11111122 +// out[1] = 22223333 +// out[2] = 33444444 + +// Duff's device again: +switch (st.bytes) +{ + for (;;) + { + case 0: |