1 files changed, 60 insertions, 0 deletions
diff --git a/src/libstddjb/string_unquote_withdelim.c b/src/libstddjb/string_unquote_withdelim.c
new file mode 100644
index 0000000..dd52dbd
--- /dev/null
+++ b/src/libstddjb/string_unquote_withdelim.c
@@ -0,0 +1,60 @@
+/* ISC license. */
+
+#include <errno.h>
+#include <skalibs/error.h>
+#include <skalibs/bytestr.h>
+#include <skalibs/fmtscan.h>
+#include <skalibs/skamisc.h>
+
+#define PUSH0 0x40
+#define PUSH  0x20
+#define PUSHSPEC 0x10
+#define STORE 0x08
+#define CALC 0x04
+#define SYNTAXERROR 0x02
+#define BROKENPIPE 0x01
+
+int string_unquote_withdelim (char *d, unsigned int *w, char const *s, unsigned int len, unsigned int *r, char const *delim, unsigned int delimlen)
+{
+  register unsigned int i = 0 ;
+  static unsigned char const actions[5][9] =
+  {
+    { 0, 0, PUSH, PUSH, PUSH, PUSH, PUSH, PUSH, 0 },
+    { PUSH, PUSH, 0, PUSH, PUSHSPEC, PUSH, PUSHSPEC, PUSH, BROKENPIPE },
+    { PUSH0, PUSH0, PUSH0|PUSH, 0, PUSH0|PUSH, PUSH0|PUSH, PUSH0|PUSH, PUSH0|PUSH, PUSH0 },
+    { SYNTAXERROR, SYNTAXERROR, STORE, SYNTAXERROR, STORE, STORE, SYNTAXERROR, SYNTAXERROR, BROKENPIPE },
+    { SYNTAXERROR, SYNTAXERROR, CALC, SYNTAXERROR, CALC, CALC, SYNTAXERROR, SYNTAXERROR, BROKENPIPE }
+  } ;
+  static unsigned char const states[5][9] =
+  {
+    { 1, 5, 0, 0, 0, 0, 0, 0, 5 },
+    { 0, 0, 2, 0, 0, 0, 0, 0, 6 },
+    { 1, 5, 0, 3, 0, 0, 0, 0, 5 },
+    { 6, 6, 4, 6, 4, 4, 6, 6, 6 },
+    { 6, 6, 0, 6, 0, 0, 6, 6, 6 }
+  } ;
+  unsigned char class[256] = "7777777777777777777777777777777777777777777777772555555555777777777777777777777777777777777707777445554777777767776767673777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777" ;
+  unsigned char store = 0 ;
+  unsigned char state = 0 ;
+  for (; i < delimlen ; i++)
+    if (class[(unsigned char)delim[i]] == '7')
+      class[(unsigned char)delim[i]] = '1' ;
+    else return (errno = EINVAL, 0) ;
+  *w = 0 ;
+
+  for (i = 0 ; state < 5 ; i++)
+  {
+    unsigned char c = i < len ? class[(unsigned char)s[i]] - '0' : 8 ;
+    unsigned char action = actions[state][c] ;
+    state = states[state][c] ;
+    if (action & PUSH0) d[(*w)++] = 0 ;
+    if (action & PUSH) d[(*w)++] = s[i] ;
+    if (action & PUSHSPEC) d[(*w)++] = 7 + byte_chr("abtnvfr", 7, s[i]) ;
+    if (action & STORE) store = fmtscan_num(s[i], 16) << 4 ;
+    if (action & CALC) d[(*w)++] = store | fmtscan_num(s[i], 16) ;
+    if (action & SYNTAXERROR) errno = EPROTO ;
+    if (action & BROKENPIPE) errno = EPIPE ;
+  }
+  *r = i - 1 ;
+  return (state == 5) ;
+}