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[tor-commits] [tor/master] Move confline.c to lib/encoding: it is about encoding key-value pairs



commit b9b44bf000735135e1913fd9c22cd6c1547dbdb3
Author: Nick Mathewson <nickm@xxxxxxxxxxxxxx>
Date:   Wed Jun 27 16:52:39 2018 -0400

    Move confline.c to lib/encoding: it is about encoding key-value pairs
    
    Also, move "unescape_string()" to encoding too, since it's about
    encoding data as C strings.
---
 src/common/include.am                   |   2 -
 src/common/util.c                       | 119 ----------------------------
 src/common/util.h                       |   3 +-
 src/{common => lib/encoding}/confline.c |  15 ++--
 src/{common => lib/encoding}/confline.h |   0
 src/lib/encoding/cstring.c              | 132 ++++++++++++++++++++++++++++++++
 src/lib/encoding/cstring.h              |  13 ++++
 src/lib/encoding/include.am             |   4 +
 8 files changed, 160 insertions(+), 128 deletions(-)

diff --git a/src/common/include.am b/src/common/include.am
index 4fd3284ab..14e7dcb9f 100644
--- a/src/common/include.am
+++ b/src/common/include.am
@@ -36,7 +36,6 @@ LIBOR_A_SRC = \
   src/common/compat.c					\
   src/common/compat_threads.c				\
   src/common/compat_time.c				\
-  src/common/confline.c					\
   src/common/conffile.c					\
   src/common/memarea.c					\
   src/common/util.c					\
@@ -81,7 +80,6 @@ COMMONHEADERS = \
   src/common/compat_threads.h			\
   src/common/compat_time.h			\
   src/common/conffile.h				\
-  src/common/confline.h				\
   src/common/handles.h				\
   src/common/memarea.h				\
   src/common/procmon.h				\
diff --git a/src/common/util.c b/src/common/util.c
index 28efa4a04..f641c1081 100644
--- a/src/common/util.c
+++ b/src/common/util.c
@@ -453,125 +453,6 @@ tv_to_msec(const struct timeval *tv)
  *    Filesystem operations.
  */
 
-#define TOR_ISODIGIT(c) ('0' <= (c) && (c) <= '7')
-
-/** Given a c-style double-quoted escaped string in <b>s</b>, extract and
- * decode its contents into a newly allocated string.  On success, assign this
- * string to *<b>result</b>, assign its length to <b>size_out</b> (if
- * provided), and return a pointer to the position in <b>s</b> immediately
- * after the string.  On failure, return NULL.
- */
-const char *
-unescape_string(const char *s, char **result, size_t *size_out)
-{
-  const char *cp;
-  char *out;
-  if (s[0] != '\"')
-    return NULL;
-  cp = s+1;
-  while (1) {
-    switch (*cp) {
-      case '\0':
-      case '\n':
-        return NULL;
-      case '\"':
-        goto end_of_loop;
-      case '\\':
-        if (cp[1] == 'x' || cp[1] == 'X') {
-          if (!(TOR_ISXDIGIT(cp[2]) && TOR_ISXDIGIT(cp[3])))
-            return NULL;
-          cp += 4;
-        } else if (TOR_ISODIGIT(cp[1])) {
-          cp += 2;
-          if (TOR_ISODIGIT(*cp)) ++cp;
-          if (TOR_ISODIGIT(*cp)) ++cp;
-        } else if (cp[1] == 'n' || cp[1] == 'r' || cp[1] == 't' || cp[1] == '"'
-                   || cp[1] == '\\' || cp[1] == '\'') {
-          cp += 2;
-        } else {
-          return NULL;
-        }
-        break;
-      default:
-        ++cp;
-        break;
-    }
-  }
- end_of_loop:
-  out = *result = tor_malloc(cp-s + 1);
-  cp = s+1;
-  while (1) {
-    switch (*cp)
-      {
-      case '\"':
-        *out = '\0';
-        if (size_out) *size_out = out - *result;
-        return cp+1;
-
-        /* LCOV_EXCL_START -- we caught this in parse_config_from_line. */
-      case '\0':
-        tor_fragile_assert();
-        tor_free(*result);
-        return NULL;
-        /* LCOV_EXCL_STOP */
-      case '\\':
-        switch (cp[1])
-          {
-          case 'n': *out++ = '\n'; cp += 2; break;
-          case 'r': *out++ = '\r'; cp += 2; break;
-          case 't': *out++ = '\t'; cp += 2; break;
-          case 'x': case 'X':
-            {
-              int x1, x2;
-
-              x1 = hex_decode_digit(cp[2]);
-              x2 = hex_decode_digit(cp[3]);
-              if (x1 == -1 || x2 == -1) {
-                /* LCOV_EXCL_START */
-                /* we caught this above in the initial loop. */
-                tor_assert_nonfatal_unreached();
-                tor_free(*result);
-                return NULL;
-                /* LCOV_EXCL_STOP */
-              }
-
-              *out++ = ((x1<<4) + x2);
-              cp += 4;
-            }
-            break;
-          case '0': case '1': case '2': case '3': case '4': case '5':
-          case '6': case '7':
-            {
-              int n = cp[1]-'0';
-              cp += 2;
-              if (TOR_ISODIGIT(*cp)) { n = n*8 + *cp-'0'; cp++; }
-              if (TOR_ISODIGIT(*cp)) { n = n*8 + *cp-'0'; cp++; }
-              if (n > 255) { tor_free(*result); return NULL; }
-              *out++ = (char)n;
-            }
-            break;
-          case '\'':
-          case '\"':
-          case '\\':
-          case '\?':
-            *out++ = cp[1];
-            cp += 2;
-            break;
-
-            /* LCOV_EXCL_START */
-          default:
-            /* we caught this above in the initial loop. */
-            tor_assert_nonfatal_unreached();
-            tor_free(*result); return NULL;
-            /* LCOV_EXCL_STOP */
-          }
-        break;
-      default:
-        *out++ = *cp++;
-      }
-  }
-}
-
 /* =====
  * Process helpers
  * ===== */
diff --git a/src/common/util.h b/src/common/util.h
index 7547b8708..549bbf9aa 100644
--- a/src/common/util.h
+++ b/src/common/util.h
@@ -39,6 +39,7 @@
 #include "lib/fs/files.h"
 #include "lib/fs/path.h"
 #include "lib/encoding/time_fmt.h"
+#include "lib/encoding/cstring.h"
 
 void tor_log_mallinfo(int severity);
 
@@ -102,8 +103,6 @@ const char *stream_status_to_string(enum stream_status stream_status);
 
 enum stream_status get_string_from_pipe(int fd, char *buf, size_t count);
 
-const char *unescape_string(const char *s, char **result, size_t *size_out);
-
 /* Process helpers */
 void start_daemon(void);
 void finish_daemon(const char *desired_cwd);
diff --git a/src/common/confline.c b/src/lib/encoding/confline.c
similarity index 96%
rename from src/common/confline.c
rename to src/lib/encoding/confline.c
index 80e5994ce..7f535b321 100644
--- a/src/common/confline.c
+++ b/src/lib/encoding/confline.c
@@ -4,11 +4,16 @@
  * Copyright (c) 2007-2018, The Tor Project, Inc. */
 /* See LICENSE for licensing information */
 
-#include "common/compat.h"
-#include "common/confline.h"
+#include "lib/encoding/confline.h"
+#include "lib/encoding/cstring.h"
 #include "lib/log/torlog.h"
-#include "common/util.h"
-#include "lib/container/smartlist.h"
+#include "lib/log/util_bug.h"
+#include "lib/malloc/util_malloc.h"
+#include "lib/string/compat_ctype.h"
+#include "lib/string/compat_string.h"
+#include "lib/string/util_string.h"
+
+#include <string.h>
 
 /** Helper: allocate a new configuration option mapping 'key' to 'val',
  * append it to *<b>lst</b>. */
@@ -74,7 +79,7 @@ config_line_find(const config_line_t *lines,
 int
 config_get_lines_aux(const char *string, config_line_t **result, int extended,
                      int allow_include, int *has_include,
-                     smartlist_t *opened_lst, int recursion_level,
+                     struct smartlist_t *opened_lst, int recursion_level,
                      config_line_t **last,
                      include_handler_fn handle_include)
 {
diff --git a/src/common/confline.h b/src/lib/encoding/confline.h
similarity index 100%
rename from src/common/confline.h
rename to src/lib/encoding/confline.h
diff --git a/src/lib/encoding/cstring.c b/src/lib/encoding/cstring.c
new file mode 100644
index 000000000..86c17f0d2
--- /dev/null
+++ b/src/lib/encoding/cstring.c
@@ -0,0 +1,132 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#include "lib/encoding/cstring.h"
+#include "lib/log/torlog.h"
+#include "lib/log/util_bug.h"
+#include "lib/malloc/util_malloc.h"
+#include "lib/string/compat_ctype.h"
+
+#include <string.h>
+
+#define TOR_ISODIGIT(c) ('0' <= (c) && (c) <= '7')
+
+/** Given a c-style double-quoted escaped string in <b>s</b>, extract and
+ * decode its contents into a newly allocated string.  On success, assign this
+ * string to *<b>result</b>, assign its length to <b>size_out</b> (if
+ * provided), and return a pointer to the position in <b>s</b> immediately
+ * after the string.  On failure, return NULL.
+ */
+const char *
+unescape_string(const char *s, char **result, size_t *size_out)
+{
+  const char *cp;
+  char *out;
+  if (s[0] != '\"')
+    return NULL;
+  cp = s+1;
+  while (1) {
+    switch (*cp) {
+      case '\0':
+      case '\n':
+        return NULL;
+      case '\"':
+        goto end_of_loop;
+      case '\\':
+        if (cp[1] == 'x' || cp[1] == 'X') {
+          if (!(TOR_ISXDIGIT(cp[2]) && TOR_ISXDIGIT(cp[3])))
+            return NULL;
+          cp += 4;
+        } else if (TOR_ISODIGIT(cp[1])) {
+          cp += 2;
+          if (TOR_ISODIGIT(*cp)) ++cp;
+          if (TOR_ISODIGIT(*cp)) ++cp;
+        } else if (cp[1] == 'n' || cp[1] == 'r' || cp[1] == 't' || cp[1] == '"'
+                   || cp[1] == '\\' || cp[1] == '\'') {
+          cp += 2;
+        } else {
+          return NULL;
+        }
+        break;
+      default:
+        ++cp;
+        break;
+    }
+  }
+ end_of_loop:
+  out = *result = tor_malloc(cp-s + 1);
+  cp = s+1;
+  while (1) {
+    switch (*cp)
+      {
+      case '\"':
+        *out = '\0';
+        if (size_out) *size_out = out - *result;
+        return cp+1;
+
+        /* LCOV_EXCL_START -- we caught this in parse_config_from_line. */
+      case '\0':
+        tor_fragile_assert();
+        tor_free(*result);
+        return NULL;
+        /* LCOV_EXCL_STOP */
+      case '\\':
+        switch (cp[1])
+          {
+          case 'n': *out++ = '\n'; cp += 2; break;
+          case 'r': *out++ = '\r'; cp += 2; break;
+          case 't': *out++ = '\t'; cp += 2; break;
+          case 'x': case 'X':
+            {
+              int x1, x2;
+
+              x1 = hex_decode_digit(cp[2]);
+              x2 = hex_decode_digit(cp[3]);
+              if (x1 == -1 || x2 == -1) {
+                /* LCOV_EXCL_START */
+                /* we caught this above in the initial loop. */
+                tor_assert_nonfatal_unreached();
+                tor_free(*result);
+                return NULL;
+                /* LCOV_EXCL_STOP */
+              }
+
+              *out++ = ((x1<<4) + x2);
+              cp += 4;
+            }
+            break;
+          case '0': case '1': case '2': case '3': case '4': case '5':
+          case '6': case '7':
+            {
+              int n = cp[1]-'0';
+              cp += 2;
+              if (TOR_ISODIGIT(*cp)) { n = n*8 + *cp-'0'; cp++; }
+              if (TOR_ISODIGIT(*cp)) { n = n*8 + *cp-'0'; cp++; }
+              if (n > 255) { tor_free(*result); return NULL; }
+              *out++ = (char)n;
+            }
+            break;
+          case '\'':
+          case '\"':
+          case '\\':
+          case '\?':
+            *out++ = cp[1];
+            cp += 2;
+            break;
+
+            /* LCOV_EXCL_START */
+          default:
+            /* we caught this above in the initial loop. */
+            tor_assert_nonfatal_unreached();
+            tor_free(*result); return NULL;
+            /* LCOV_EXCL_STOP */
+          }
+        break;
+      default:
+        *out++ = *cp++;
+      }
+  }
+}
diff --git a/src/lib/encoding/cstring.h b/src/lib/encoding/cstring.h
new file mode 100644
index 000000000..3dff5e7f7
--- /dev/null
+++ b/src/lib/encoding/cstring.h
@@ -0,0 +1,13 @@
+/* Copyright (c) 2001 Matej Pfajfar.
+ * Copyright (c) 2001-2004, Roger Dingledine.
+ * Copyright (c) 2004-2006, Roger Dingledine, Nick Mathewson.
+ * Copyright (c) 2007-2018, The Tor Project, Inc. */
+/* See LICENSE for licensing information */
+
+#ifndef TOR_CSTRING_H
+#define TOR_CSTRING_H
+
+#include <stddef.h>
+const char *unescape_string(const char *s, char **result, size_t *size_out);
+
+#endif /* !defined(TOR_CSTRING_H) */
diff --git a/src/lib/encoding/include.am b/src/lib/encoding/include.am
index 345fe14e1..93f515dd4 100644
--- a/src/lib/encoding/include.am
+++ b/src/lib/encoding/include.am
@@ -6,6 +6,8 @@ endif
 
 src_lib_libtor_encoding_a_SOURCES =			\
 	src/lib/encoding/binascii.c			\
+        src/lib/encoding/confline.c			\
+        src/lib/encoding/cstring.c			\
 	src/lib/encoding/time_fmt.c
 
 src_lib_libtor_encoding_testing_a_SOURCES = \
@@ -15,4 +17,6 @@ src_lib_libtor_encoding_testing_a_CFLAGS = $(AM_CFLAGS) $(TEST_CFLAGS)
 
 noinst_HEADERS +=					\
 	src/lib/encoding/binascii.h			\
+        src/lib/encoding/confline.h			\
+        src/lib/encoding/cstring.h			\
 	src/lib/encoding/time_fmt.h



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