MINOR: sample: add ltrim converter
This converter strips specified characters from the beginning of a string.
diff --git a/doc/configuration.txt b/doc/configuration.txt
index df4465c..c8e9cbc 100644
--- a/doc/configuration.txt
+++ b/doc/configuration.txt
@@ -14249,6 +14249,10 @@
# e.g. 20140710162350 127.0.0.1:57325
log-format %[date,ltime(%Y%m%d%H%M%S)]\ %ci:%cp
+ltrim(<chars>)
+ Skips any characters from <chars> from the beginning of the string
+ representation of the input sample.
+
map(<map_file>[,<default_value>])
map_<match_type>(<map_file>[,<default_value>])
map_<match_type>_<output_type>(<map_file>[,<default_value>])
diff --git a/src/sample.c b/src/sample.c
index 43d932d..fbbdab1 100644
--- a/src/sample.c
+++ b/src/sample.c
@@ -2994,6 +2994,27 @@
return 1;
}
+/**/
+static int sample_conv_ltrim(const struct arg *arg_p, struct sample *smp, void *private)
+{
+ char *delimiters, *p;
+ size_t dlen, l;
+
+ delimiters = arg_p[0].data.str.area;
+ dlen = arg_p[0].data.str.data;
+
+ l = smp->data.u.str.data;
+ p = smp->data.u.str.area;
+ while (l && memchr(delimiters, *p, dlen) != NULL) {
+ p++;
+ l--;
+ }
+
+ smp->data.u.str.area = p;
+ smp->data.u.str.data = l;
+ return 1;
+}
+
/************************************************************************/
/* All supported sample fetch functions must be declared here */
/************************************************************************/
@@ -3464,6 +3485,7 @@
{ "htonl", sample_conv_htonl, 0, NULL, SMP_T_SINT, SMP_T_BIN },
{ "cut_crlf", sample_conv_cut_crlf, 0, NULL, SMP_T_STR, SMP_T_STR },
+ { "ltrim", sample_conv_ltrim, ARG1(1,STR), NULL, SMP_T_STR, SMP_T_STR },
{ NULL, NULL, 0, 0, 0 },
}};