From 28720d4a9dae311e60addf4d174425d26e32ef42 Mon Sep 17 00:00:00 2001
From: default <nobody@localhost>
Date: Tue, 9 May 2023 14:23:30 +0200
Subject: [PATCH] Backport from xs.

---
 xs_encdec.h  | 163 ---------------------------------------------------
 xs_version.h |   2 +-
 2 files changed, 1 insertion(+), 164 deletions(-)

diff --git a/xs_encdec.h b/xs_encdec.h
index d3178f4..f4ffe22 100644
--- a/xs_encdec.h
+++ b/xs_encdec.h
@@ -7,10 +7,6 @@
  xs_str *xs_hex_enc(const xs_val *data, int size);
  xs_val *xs_hex_dec(const xs_str *hex, int *size);
  int xs_is_hex(const char *str);
- xs_str *xs_base32_enc(const xs_val *data, int sz);
- xs_str *xs_base32hex_enc(const xs_val *data, int sz);
- xs_val *xs_base32_dec(const xs_str *data, int *size);
- xs_val *xs_base32hex_dec(const xs_str *data, int *size);
  xs_str *xs_base64_enc(const xs_val *data, int sz);
  xs_val *xs_base64_dec(const xs_str *data, int *size);
  int xs_is_base64(const char *str);
@@ -84,165 +80,6 @@ int xs_is_hex(const char *str)
 }
 
 
-/** base32 */
-
-static char *xs_b32_tbl = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
-                          "234567=";
-
-static char *xs_b32hex_tbl = "0123456789"
-                             "ABCDEFGHIJKLMNOPQRSTUV=";
-
-/*
-    00000|00011|11111|12222|22223|33333|33444|44444
-*/
-
-xs_str *xs_base32_enc_tbl(const xs_val *data, int sz, const char *b32_tbl)
-/* encodes data to base32 using a table */
-{
-    xs_str *s = xs_str_new(NULL);
-    unsigned char *p;
-    int n;
-
-    p = (unsigned char *)data;
-
-    for (n = 0; n < sz; n += 5) {
-        int l = sz - n;
-        char enc[9] = "========";
-
-        enc[0] = b32_tbl[(p[n] >> 3) & 0x1f];
-
-        if (l > 1) {
-            enc[1] = b32_tbl[(p[n] << 2 | p[n + 1] >> 6) & 0x1f];
-            enc[2] = b32_tbl[(p[n + 1] >> 1) & 0x1f];
-
-            if (l > 2) {
-                enc[3] = b32_tbl[(p[n + 1] << 4 | p[n + 2] >> 4) & 0x1f];
-
-                if (l > 3) {
-                    enc[4] = b32_tbl[(p[n + 2] << 1 | p[n + 3] >> 7) & 0x1f];
-                    enc[5] = b32_tbl[(p[n + 3] >> 2) & 0x1f];
-
-                    if (l > 4) {
-                        enc[6] = b32_tbl[(p[n + 3] << 3 | p[n + 4] >> 5) & 0x1f];
-                        enc[7] = b32_tbl[(p[n + 4]) & 0x1f];
-                    }
-                    else
-                        enc[6] = b32_tbl[(p[n + 3] << 3) & 0x1f];
-                }
-                else
-                    enc[4] = b32_tbl[(p[n + 2] << 1) & 0x1f];
-            }
-            else
-                enc[3] = b32_tbl[(p[n + 1] << 4) & 0x1f];
-        }
-        else
-            enc[1] = b32_tbl[(p[n] << 2) & 0x1f];
-
-        s = xs_str_cat(s, enc);
-    }
-
-    return s;
-}
-
-
-xs_str *xs_base32_enc(const xs_val *data, int sz)
-/* encodes data to base32 */
-{
-    return xs_base32_enc_tbl(data, sz, xs_b32_tbl);
-}
-
-
-xs_str *xs_base32hex_enc(const xs_val *data, int sz)
-/* encodes data to base32 with HEX alphabet (RFC4648) */
-{
-    return xs_base32_enc_tbl(data, sz, xs_b32hex_tbl);
-}
-
-
-xs_val *xs_base32_dec_tbl(const xs_str *data, int *size, const char *b32_tbl)
-/* decodes data from base32 using a table */
-{
-    xs_val *s = NULL;
-    int sz = 0;
-    char *p;
-
-    p = (char *)data;
-
-    /* size of data must be a multiple of 8 */
-    if (strlen(p) % 8)
-        return NULL;
-
-    for (p = (char *)data; *p; p += 8) {
-        int cs[8];
-        int n;
-        unsigned char tmp[5];
-
-        for (n = 0; n < 8; n++) {
-            char *ss = strchr(b32_tbl, p[n]);
-
-            if (ss == NULL) {
-                /* not a base32 char */
-                return xs_free(s);
-            }
-
-            cs[n] = ss - b32_tbl;
-        }
-
-        n = 0;
-
-        /* #0 byte */
-        tmp[n++] = cs[0] << 3 | cs[1] >> 2;
-
-        if (cs[2] != 32) {
-            /* #1 byte */
-            tmp[n++] = (cs[1] & 0x3) << 6 | cs[2] << 1 | (cs[3] & 0x10) >> 4;
-
-            if (cs[4] != 32) {
-                /* #2 byte */
-                tmp[n++] = (cs[3] & 0xf) << 4 | cs[4] >> 1;
-
-                if (cs[5] != 32) {
-                    /* #3 byte */
-                    tmp[n++] = (cs[4] & 0x1) << 7 | cs[5] << 2 | cs[6] >> 3;
-
-                    if (cs[7] != 32) {
-                        /* #4 byte */
-                        tmp[n++] = (cs[6] & 0x7) << 5 | cs[7];
-                    }
-                }
-            }
-        }
-
-        /* must be done manually because data can be pure binary */
-        s = xs_realloc(s, _xs_blk_size(sz + n));
-        memcpy(s + sz, tmp, n);
-        sz += n;
-    }
-
-    /* asciiz it to use it as a string */
-    s = xs_realloc(s, _xs_blk_size(sz + 1));
-    s[sz] = '\0';
-
-    *size = sz;
-
-    return s;
-}
-
-
-xs_val *xs_base32_dec(const xs_str *data, int *size)
-/* decodes data from base32 */
-{
-    return xs_base32_dec_tbl(data, size, xs_b32_tbl);
-}
-
-
-xs_val *xs_base32hex_dec(const xs_str *data, int *size)
-/* decodes data from base32 with HEX alphabet (RFC4648) */
-{
-    return xs_base32_dec_tbl(data, size, xs_b32hex_tbl);
-}
-
-
 /** base64 */
 
 static char *xs_b64_tbl = "ABCDEFGHIJKLMNOPQRSTUVWXYZ"
diff --git a/xs_version.h b/xs_version.h
index c038df3..d2b2069 100644
--- a/xs_version.h
+++ b/xs_version.h
@@ -1 +1 @@
-/* d8ec27efc55ba67403e88bfbe7d2ce9905364d6d */
+/* 01bea7d4a0e631c0406b358dda9cc9409362c003 */