1 files changed, 87 insertions, 0 deletions
diff --git a/src/libexecline/el_parse.c b/src/libexecline/el_parse.c
new file mode 100644
index 0000000..1544f51
--- /dev/null
+++ b/src/libexecline/el_parse.c
@@ -0,0 +1,87 @@
+/* ISC license. */
+
+#include <skalibs/uint16.h>
+#include <skalibs/uint.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/stralloc.h>
+#include <skalibs/djbunix.h>
+#include <execline/execline.h>
+
+int el_parse (stralloc *sa, el_chargen_func_t_ref next, void *source)
+{
+  static unsigned char const class[256] = "`aaaaaaaaadaaaaaaaaaaaaaaaaaaaaaafcbffffffffffffjhhhhhhhiifffffffmmmmmmfffffffffffffffffffffeffffggmmmgfffffffkfffkfkfkflffnfoffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffffff" ;
+  static uint16 const table[16][16] =
+  {
+    { 0x0011, 0x4011, 0x0010, 0x0010, 0x0010, 0x0011, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x0010, 0x4091 },
+    { 0x0000, 0x4000, 0x8001, 0x8003, 0x8003, 0x0005, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x0010, 0x8403, 0x8403, 0x0100, 0x4080 },
+    { 0x0005, 0x8001, 0x8001, 0x8003, 0x8003, 0x0005, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x0010, 0x8403, 0x8403, 0x8001, 0x8001 },
+    { 0x0203, 0x0003, 0x8001, 0x0001, 0x8003, 0x0005, 0x0010, 0x0401, 0x0401, 0x0401, 0x0401, 0x0010, 0x0401, 0x0401, 0x0003, 0x0003 },
+    { 0x0000, 0x4000, 0x8001, 0x8003, 0x0003, 0x0000, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x0010, 0x8403, 0x8403, 0x0100, 0x4080 },
+    { 0x0202, 0x0002, 0x8001, 0x0004, 0x8003, 0x0005, 0x0010, 0x0404, 0x0404, 0x0404, 0x0404, 0x0010, 0x0404, 0x0404, 0x0002, 0x0002 },
+    { 0x8201, 0x8001, 0x8001, 0x8003, 0x8003, 0x0005, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x0010, 0x8403, 0x8403, 0x8001, 0x8001 },
+    { 0x8201, 0x8001, 0x8001, 0x8003, 0x2003, 0x0005, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x880c, 0x800d, 0x8403, 0x8001, 0x8001 },
+    { 0x8201, 0x8001, 0x8001, 0x8003, 0x9809, 0x0005, 0x8807, 0x8008, 0x800d, 0x800a, 0x800d, 0x880c, 0x800d, 0x8403, 0x8001, 0x8001 },
+    { 0x8201, 0x8001, 0x8001, 0x8003, 0x9809, 0x0005, 0x0010, 0x8403, 0x8403, 0x800a, 0x800d, 0x880c, 0x800d, 0x8403, 0x8001, 0x8001 },
+    { 0x8201, 0x8001, 0x8001, 0x8003, 0x1006, 0x0005, 0x8807, 0x8008, 0x800d, 0x800a, 0x800d, 0x880c, 0x800d, 0x8403, 0x8001, 0x8001 },
+    { 0x8201, 0x8001, 0x8001, 0x8003, 0x2003, 0x0005, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x0010, 0x8403, 0x8403, 0x8001, 0x8001 },
+    { 0x8201, 0x8001, 0x8001, 0x8003, 0x8003, 0x0005, 0x100b, 0x8403, 0x8403, 0x8403, 0x8403, 0x0010, 0x8403, 0x8403, 0x8001, 0x8001 },
+    { 0x8201, 0x8001, 0x8001, 0x8003, 0x8003, 0x0005, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x880c, 0x800d, 0x8403, 0x8001, 0x8001 },
+    { 0x820e, 0x8001, 0x8001, 0x8003, 0x8003, 0x0005, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x0010, 0x8403, 0x8403, 0x8001, 0x8001 },
+    { 0x820f, 0x8001, 0x8001, 0x8003, 0x8003, 0x0005, 0x0010, 0x8403, 0x8403, 0x8403, 0x8403, 0x0010, 0x8403, 0x8403, 0x8001, 0x8001 }
+  } ;
+
+  unsigned int mark = 0 ;
+  unsigned int n = 0 ;
+  unsigned int blevel = 0 ;
+  unsigned char state = 0, base = 10 ;
+
+  while (state < 0x10)
+  {
+    uint16 c ;
+    unsigned char cur ;
+    if (!(*next)(&cur, source)) return -1 ;
+    c = table[class[cur]-'`'][state] ;
+    state = c & 0x1F ;
+
+    if (c & 0x0400)
+    {
+      unsigned int z ;
+      if (!stralloc_0(sa)) return -1 ;
+      sa->len = mark ;
+      uint_scan_base(sa->s + sa->len, &z, base) ;
+      sa->s[sa->len++] = (unsigned char)z ;
+    }
+    if (c & 0x0800) mark = sa->len ;
+    if (c & 0x0200)
+    {
+      char tilde = EXECLINE_BLOCK_QUOTE_CHAR ;
+      register unsigned int i = blevel ;
+      if (!stralloc_readyplus(sa, i<<1)) return -1 ;
+      while (i--) stralloc_catb(sa, &tilde, 1) ;
+    }
+    if (c & 0x0100) sa->len -= ++blevel ;
+    if (c & 0x0080)
+    {
+      if (!blevel--) return -4 ;
+      sa->s[--sa->len-1] = EXECLINE_BLOCK_END_CHAR ;
+      if (!EXECLINE_BLOCK_END_CHAR) sa->len-- ;
+    }
+    if (c & 0x8000) if (!stralloc_catb(sa, (char *)&cur, 1)) return -1 ;
+    if (c & 0x2000)
+    {
+      char x = 7 + byte_chr("abtnvfr", 7, cur) ;
+      if (!stralloc_catb(sa, &x, 1)) return -1 ;
+    }
+    if (c & 0x4000) if (n++, !stralloc_0(sa)) return -1 ;
+    if (c & 0x1000)
+      switch (cur)
+      {
+        case 'x' : base = 16 ; break ;
+        case '0' : base = 8 ; break ;
+        default : base = 10 ;
+      }
+  }
+  if (state == 0x10) return -2 ;
+  if (blevel) return -3 ;
+  return n ;
+}