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Diffstat (limited to 'Build/source/texk/web2c/mfluadir/otfcc/lib/support/base64/base64.c')
-rw-r--r--Build/source/texk/web2c/mfluadir/otfcc/lib/support/base64/base64.c89
1 files changed, 89 insertions, 0 deletions
diff --git a/Build/source/texk/web2c/mfluadir/otfcc/lib/support/base64/base64.c b/Build/source/texk/web2c/mfluadir/otfcc/lib/support/base64/base64.c
new file mode 100644
index 00000000000..b57a0e156cf
--- /dev/null
+++ b/Build/source/texk/web2c/mfluadir/otfcc/lib/support/base64/base64.c
@@ -0,0 +1,89 @@
+#include "base64.h"
+#include "../otfcc-alloc.h"
+
+static const uint8_t base64_table[64] =
+ "ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789+/";
+
+uint8_t *base64_encode(const uint8_t *src, size_t len, size_t *out_len) {
+ uint8_t *out, *pos;
+ const uint8_t *end, *in;
+ size_t olen;
+
+ olen = (len + 3 - 1) / 3 * 4; /* 3-byte blocks to 4-byte */
+ olen++; /* nul termination */
+ out = __caryll_malloc(sizeof(uint8_t) * olen);
+ if (out == NULL) return NULL;
+
+ end = src + len;
+ in = src;
+ pos = out;
+ while (end - in >= 3) {
+ *pos++ = base64_table[in[0] >> 2];
+ *pos++ = base64_table[((in[0] & 0x03) << 4) | (in[1] >> 4)];
+ *pos++ = base64_table[((in[1] & 0x0f) << 2) | (in[2] >> 6)];
+ *pos++ = base64_table[in[2] & 0x3f];
+ in += 3;
+ }
+
+ if (end - in) {
+ *pos++ = base64_table[in[0] >> 2];
+ if (end - in == 1) {
+ *pos++ = base64_table[(in[0] & 0x03) << 4];
+ *pos++ = '=';
+ } else {
+ *pos++ = base64_table[((in[0] & 0x03) << 4) | (in[1] >> 4)];
+ *pos++ = base64_table[(in[1] & 0x0f) << 2];
+ }
+ *pos++ = '=';
+ }
+
+ *pos = '\0';
+ if (out_len) *out_len = pos - out;
+ return out;
+}
+
+uint8_t *base64_decode(const uint8_t *src, size_t len, size_t *out_len) {
+ uint8_t dtable[256], *out, *pos, in[4], block[4], tmp;
+ size_t i, count;
+
+ memset(dtable, 0x80, 256);
+ for (i = 0; i < sizeof(base64_table); i++)
+ dtable[base64_table[i]] = i;
+ dtable['='] = 0;
+
+ count = 0;
+ for (i = 0; i < len; i++) {
+ if (dtable[src[i]] != 0x80) count++;
+ }
+
+ if (count % 4) return NULL;
+
+ pos = out = __caryll_malloc(sizeof(uint8_t) * count);
+ if (out == NULL) return NULL;
+
+ count = 0;
+ for (i = 0; i < len; i++) {
+ tmp = dtable[src[i]];
+ if (tmp == 0x80) continue;
+
+ in[count] = src[i];
+ block[count] = tmp;
+ count++;
+ if (count == 4) {
+ *pos++ = (block[0] << 2) | (block[1] >> 4);
+ *pos++ = (block[1] << 4) | (block[2] >> 2);
+ *pos++ = (block[2] << 6) | block[3];
+ count = 0;
+ }
+ }
+
+ if (pos > out) {
+ if (in[2] == '=')
+ pos -= 2;
+ else if (in[3] == '=')
+ pos--;
+ }
+
+ *out_len = pos - out;
+ return out;
+}