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From: David Bremner <david@tethera.net>
To: notmuch@notmuchmail.org
Cc: David Bremner <david@tethera.net>
Subject: [PATCH 11/36] util: add strsplit_len: simplified strtok with delimiter escaping
Date: Sun,  3 Jan 2021 19:35:22 -0400	[thread overview]
Message-ID: <20210103233547.122707-12-david@tethera.net> (raw)
In-Reply-To: <20210103233547.122707-1-david@tethera.net>

This will be used to make iterators for configuration values.
---
 util/string-util.c | 23 +++++++++++++++++++++++
 util/string-util.h | 14 ++++++++++++++
 2 files changed, 37 insertions(+)

diff --git a/util/string-util.c b/util/string-util.c
index de8430b2..27f8a26b 100644
--- a/util/string-util.c
+++ b/util/string-util.c
@@ -24,6 +24,7 @@
 
 #include <ctype.h>
 #include <errno.h>
+#include <stdbool.h>
 
 char *
 strtok_len (char *s, const char *delim, size_t *len)
@@ -37,6 +38,28 @@ strtok_len (char *s, const char *delim, size_t *len)
     return *len ? s : NULL;
 }
 
+const char *
+strsplit_len (const char *s, char delim, size_t *len)
+{
+    bool escaping = false;
+    size_t count = 0;
+
+    /* Skip initial unescaped delimiters */
+    while (*s && *s == delim)
+	s++;
+
+    while (s[count] && (escaping || s[count] != delim)) {
+	escaping = (s[count] == '\\');
+	count++;
+    }
+
+    if (count==0)
+	return NULL;
+
+    *len = count;
+    return s;
+}
+
 const char *
 strtok_len_c (const char *s, const char *delim, size_t *len)
 {
diff --git a/util/string-util.h b/util/string-util.h
index fb95a740..80647c5f 100644
--- a/util/string-util.h
+++ b/util/string-util.h
@@ -26,6 +26,20 @@ char *strtok_len (char *s, const char *delim, size_t *len);
 /* Const version of strtok_len. */
 const char *strtok_len_c (const char *s, const char *delim, size_t *len);
 
+/* Simplified version of strtok_len, with a single delimiter.
+ * Handles escaping delimiters with \
+ * Usage pattern:
+ *
+ * const char *tok = input;
+ * const char *delim = ';';
+ * size_t tok_len = 0;
+ *
+ * while ((tok = strsplit_len (tok + tok_len, delim, &tok_len)) != NULL) {
+ *     // do stuff with string tok of length tok_len
+ * }
+ */
+const char *strsplit_len (const char *s, char delim, size_t *len);
+
 /* Return a talloced string with str sanitized.
  *
  * Whitespace characters (tabs and newlines) are replaced with spaces,
-- 
2.29.2

  parent reply	other threads:[~2021-01-03 23:36 UTC|newest]

Thread overview: 45+ messages / expand[flat|nested]  mbox.gz  Atom feed  top
2021-01-03 23:35 v3 merged config David Bremner
2021-01-03 23:35 ` [PATCH 01/36] test/T750-gzip: don't compress the xapian database David Bremner
2021-01-10 15:28   ` Tomi Ollila
2021-01-11  0:57     ` David Bremner
2021-01-11 17:40       ` Tomi Ollila
2021-01-03 23:35 ` [PATCH 02/36] test/T391-python-cffi David Bremner
2021-01-10 15:33   ` Tomi Ollila
2021-01-15 11:51   ` David Bremner
2021-01-15 11:53     ` David Bremner
2021-01-15 17:07       ` Tomi Ollila
2021-01-03 23:35 ` [PATCH 03/36] lib: add _notmuch_string_map_set David Bremner
2021-01-03 23:35 ` [PATCH 04/36] lib: cache configuration information from database David Bremner
2021-01-03 23:35 ` [PATCH 05/36] lib: add stub for notmuch_database_open_with_config David Bremner
2021-01-03 23:35 ` [PATCH 06/36] lib/open: add support for config profiles and default locations David Bremner
2021-01-03 23:35 ` [PATCH 07/36] CLI: generalize notmuch_config_mode_t David Bremner
2021-01-03 23:35 ` [PATCH 08/36] lib/config: add notmuch_config_key_{get,set} David Bremner
2021-01-03 23:35 ` [PATCH 09/36] lib/open: load default values for known configuration keys David Bremner
2021-01-03 23:35 ` [PATCH 10/36] CLI: add (unused) database argument to subcommands David Bremner
2021-01-03 23:35 ` David Bremner [this message]
2021-01-03 23:35 ` [PATCH 12/36] lib/config: add config values iterator David Bremner
2021-01-03 23:35 ` [PATCH 13/36] CLI/count: switch to new configuration framework David Bremner
2021-01-03 23:35 ` [PATCH 14/36] cli/dump: convert to new config framework David Bremner
2021-01-03 23:35 ` [PATCH 15/36] lib: add notmuch_config_get_bool David Bremner
2021-01-03 23:35 ` [PATCH 16/36] CLI/restore: convert to new config framework David Bremner
2021-01-03 23:35 ` [PATCH 17/36] CLI/insert: " David Bremner
2021-01-03 23:35 ` [PATCH 18/36] cli/reindex: convert " David Bremner
2021-01-03 23:35 ` [PATCH 19/36] CLI/reply: convert to " David Bremner
2021-01-03 23:35 ` [PATCH 20/36] CLI/{search,address}: convert to new configuration framework David Bremner
2021-01-03 23:35 ` [PATCH 21/36] cli/config: add accessor for config file name David Bremner
2021-01-03 23:35 ` [PATCH 22/36] CLI/show: mostly switch show to new config framework David Bremner
2021-01-03 23:35 ` [PATCH 23/36] cli/tag: convert " David Bremner
2021-01-03 23:35 ` [PATCH 24/36] lib/config: add _notmuch_config_cache David Bremner
2021-01-03 23:35 ` [PATCH 25/36] lib: split notmuch_database_compact David Bremner
2021-01-03 23:35 ` [PATCH 26/36] cli/compact: convert to new configuration framework David Bremner
2021-01-03 23:35 ` [PATCH 27/36] bindings/notmuch2: add missing crypto error status codes David Bremner
2021-01-03 23:35 ` [PATCH 28/36] lib/config: add NOTMUCH_CONFIG_NEW_IGNORE David Bremner
2021-01-03 23:35 ` [PATCH 29/36] lib/config: make values iterators restartable David Bremner
2021-01-03 23:35 ` [PATCH 30/36] lib/open: factor out first part of open David Bremner
2021-01-03 23:35 ` [PATCH 31/36] lib: add NOTMUCH_STATUS_NO_CONFIG David Bremner
2021-01-03 23:35 ` [PATCH 32/36] lib/database: move n_d_create* to open.cc David Bremner
2021-01-03 23:35 ` [PATCH 33/36] lib: add NOTMUCH_STATUS_DATABASE_EXISTS David Bremner
2021-01-03 23:35 ` [PATCH 34/36] lib: introduce notmuch_database_create_with_config David Bremner
2021-01-03 23:35 ` [PATCH 35/36] cli/new: refactor database upgrade code David Bremner
2021-01-03 23:35 ` [PATCH 36/36] cli/new: convert to new config framework David Bremner
2021-01-06  2:48 ` v3 merged config David Bremner

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