Modify string_quote/unquote to allow encoding of space as \s

Signed-off-by: Laurent Bercot <ska@appnovation.com>

4 files changed, 14 insertions, 19 deletions

diff --git a/src/libstddjb/string_quote.c b/src/libstddjb/string_quote.c
index f995beb..c3a38f0 100644
--- a/src/libstddjb/string_quote.c
+++ b/src/libstddjb/string_quote.c
@@ -3,12 +3,12 @@
 #include <skalibs/stralloc.h>
 #include <skalibs/skamisc.h>
 
-int string_quote (stralloc *sa, char const *s, size_t len)
+int string_quote_options (stralloc *sa, char const *s, size_t len, uint32_t options)
 {
   size_t base = sa->len ;
   int wasnull = !sa->s ;
   if (!stralloc_catb(sa, "\"", 1)) return 0 ;
-  if (!string_quote_nodelim(sa, s, len) || !stralloc_catb(sa, "\"", 1))
+  if (!string_quote_nodelim_mustquote_options(sa, s, len, "\"", 1, options) || !stralloc_catb(sa, "\"", 1))
   {
     if (wasnull) stralloc_free(sa) ; else sa->len = base ;
     return 0 ;
diff --git a/src/libstddjb/string_quote_nodelim.c b/src/libstddjb/string_quote_nodelim.c
deleted file mode 100644
index a25a4e6..0000000
--- a/src/libstddjb/string_quote_nodelim.c
+++ /dev/null
@@ -1,10 +0,0 @@
-/* ISC license. */
-
-#include <string.h>
-#include <skalibs/stralloc.h>
-#include <skalibs/skamisc.h>
-
-int string_quote_nodelim (stralloc *sa, char const *s, size_t len)
-{
-  return string_quote_nodelim_mustquote(sa, s, len, "\"", 1) ;
-}
diff --git a/src/libstddjb/string_quote_nodelim_mustquote.c b/src/libstddjb/string_quote_nodelim_mustquote.c
index 535628d..c25d483 100644
--- a/src/libstddjb/string_quote_nodelim_mustquote.c
+++ b/src/libstddjb/string_quote_nodelim_mustquote.c
@@ -1,21 +1,25 @@
 /* ISC license. */
 
+#include <stdint.h>
 #include <string.h>
 #include <errno.h>
+
 #include <skalibs/fmtscan.h>
 #include <skalibs/stralloc.h>
 #include <skalibs/skamisc.h>
 
-int string_quote_nodelim_mustquote (stralloc *sa, char const *s, size_t len, char const *delim, size_t delimlen)
+int string_quote_nodelim_mustquote_options (stralloc *sa, char const *s, size_t len, char const *delim, size_t delimlen, uint32_t options)
 {
   char class[256] = "dddddddaaaaaaaddddddddddddddddddcccccccccccccccceeeeeeeeeeccccccccccccccccccccccccccccccccccbcccceeeeeecccccccecccececececcccccddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddddd" ;
   size_t base = sa->len ;
   size_t i = 0 ;
   int wasnull = !sa->s ;
 
+  if (options & 1) class[' '] = 'f' ;
+
   for (; i < delimlen ; i++)
-    if (class[(unsigned char)delim[i]] == 'c')
-      class[(unsigned char)delim[i]] = 'b' ;
+    if (class[(uint8_t)delim[i]] == 'c' || class[(uint8_t)delim[i]] == 'b')
+      class[(uint8_t)delim[i]] = 'b' ;
     else return (errno = EINVAL, 0) ;
 
   for (i = 0 ; i < len ; i++)
@@ -39,10 +43,8 @@ int string_quote_nodelim_mustquote (stralloc *sa, char const *s, size_t len, cha
       }
       case 'c' :
       case 'e' :
-      {
         if (!stralloc_catb(sa, s+i, 1)) goto err ;
         break ;
-      }
       case 'd' :
       {
         char fmt[5] = "\\0x" ;
@@ -50,6 +52,9 @@ int string_quote_nodelim_mustquote (stralloc *sa, char const *s, size_t len, cha
         if (!stralloc_catb(sa, fmt, 5)) goto err ;
         break ;
       }
+      case 'f' :
+        if (!stralloc_catb(sa, "\\s", 2)) goto err ;
+        break ;
       default : errno = EFAULT ; goto err ; /* can't happen */
     }
   }
diff --git a/src/libstddjb/string_unquote_withdelim.c b/src/libstddjb/string_unquote_withdelim.c
index 43da0db..16da0c7 100644
--- a/src/libstddjb/string_unquote_withdelim.c
+++ b/src/libstddjb/string_unquote_withdelim.c
@@ -33,7 +33,7 @@ int string_unquote_withdelim (char *d, size_t *w, char const *s, size_t len, siz
     { 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 class[256] = "7777777777777777777777777777777777777777777777772555555555777777777777777777777777777777777707777445554777777767776667673777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777777" ;
   size_t i = 0 ;
   unsigned char store = 0 ;
   unsigned char state = 0 ;
@@ -50,7 +50,7 @@ int string_unquote_withdelim (char *d, size_t *w, char const *s, size_t len, siz
     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 & PUSHSPEC) d[(*w)++] = s[i] == 's' ? ' ' : 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 ;