Two new functions, the first is a 'heuristic parser' which examines a
string describing a set of cores and determines based off heuristics
whether its a coremask or a corelist.
Second is a 'combined parser' which calls the first function and then
based off the returned value will call the relevant core string parser.
This function also takes a 'default_type' int which corresponds to
which parser should be used in the case of an ambiguous string.
Signed-off-by: Euan Bourke <euan.bou...@intel.com>
---
lib/arg_parser/arg_parser.c | 62 ++++++++++++++++++++++++++++++++
lib/arg_parser/rte_arg_parser.h | 64 +++++++++++++++++++++++++++++++++
lib/arg_parser/version.map | 2 ++
3 files changed, 128 insertions(+)
diff --git a/lib/arg_parser/arg_parser.c b/lib/arg_parser/arg_parser.c
index 8d86a7b618..1755ecb3b2 100644
--- a/lib/arg_parser/arg_parser.c
+++ b/lib/arg_parser/arg_parser.c
@@ -157,3 +157,65 @@ rte_arg_parse_coremask(const char *coremask, uint16_t
*cores, uint32_t cores_len
return corebits_to_array(&mask, cores, cores_len);
}
+
+int
+rte_arg_parse_arg_type(const char *core_string)
+{
+ /* Remove leading whitespace */
+ while (isblank(*core_string))
+ core_string++;
+
+ /* Check for 0x prefix */
+ if (core_string[0] == '0' && tolower(core_string[1]) == 'x') {
+ if (core_string[2] != '\0')
+ return RTE_ARG_PARSE_TYPE_COREMASK;
+ return -EINVAL;
+ }
+
+ int i = 0, idx = 0;
+ /* Check for ',' and '-' and check for A-F */
+ do {
+ while (isblank(core_string[idx]))
+ idx++;
+
+ if (core_string[idx] == ',' || core_string[idx] == '-')
+ return RTE_ARG_PARSE_TYPE_CORELIST;
+
+ if (isalpha(core_string[idx])) {
+ if (isxdigit(core_string[idx]))
+ return RTE_ARG_PARSE_TYPE_COREMASK;
+ return -EINVAL;
+ }
+ idx++;
+ i++;
+ } while (core_string[idx] != '\0');
+
+ /* Check length of core_string if ambiguous as max length of a uint16_t
is 5 digits
+ * implying its a coremask.
+ */
+ if (i > 5)
+ return RTE_ARG_PARSE_TYPE_COREMASK;
+
+ return -EINVAL;
+}
+
+int
+rte_arg_parse_core_string(const char *core_string, uint16_t *cores, uint32_t
cores_len,
+ int default_type)
+{
+ if (default_type != RTE_ARG_PARSE_TYPE_COREMASK &&
+ default_type != RTE_ARG_PARSE_TYPE_CORELIST) {
+ return -EINVAL;
+ }
+ switch (rte_arg_parse_arg_type(core_string)) {
+ case RTE_ARG_PARSE_TYPE_COREMASK:
+ return rte_arg_parse_coremask(core_string, cores, cores_len);
+ case RTE_ARG_PARSE_TYPE_CORELIST:
+ return rte_arg_parse_corelist(core_string, cores, cores_len);
+ default:
+ return default_type == RTE_ARG_PARSE_TYPE_COREMASK ?
+ rte_arg_parse_coremask(core_string, cores, cores_len) :
+ rte_arg_parse_corelist(core_string, cores, cores_len);
+ return -EINVAL;
+ }
+}
diff --git a/lib/arg_parser/rte_arg_parser.h b/lib/arg_parser/rte_arg_parser.h
index 49d7daa204..3b2df74d10 100644
--- a/lib/arg_parser/rte_arg_parser.h
+++ b/lib/arg_parser/rte_arg_parser.h
@@ -23,6 +23,9 @@ extern "C" {
#include <rte_compat.h>
+#define RTE_ARG_PARSE_TYPE_COREMASK 0
+#define RTE_ARG_PARSE_TYPE_CORELIST 1
+#define RTE_ARG_PARSE_TYPE_UNKNOWN 2
/**
* Convert a string describing a list of core ids into an array of core ids.
@@ -92,6 +95,67 @@ __rte_experimental
int
rte_arg_parse_coremask(const char *coremask, uint16_t *cores, uint32_t
cores_len);
+/**
+ * Use heuristics to determine if a string contains a coremask or a corelist.
+ *
+ * This function will check a series of conditions and return an int
representing which
+ * core type (mask or list) the string represents or report the type as
unknown if the
+ * string is ambiguous.
+ *
+ * @param core_string
+ * A string describing the intended cores to be parsed
+ * @return
+ * int representing the core type
+ * RTE_ARG_PARSE_TYPE_COREMASK: coremask.
+ * RTE_ARG_PARSE_TYPE_CORELIST: corelist.
+ * RTE_ARG_PARSE_TYPE_UNKNOWN: unknown (ambiguous).
+ * -EINVAL if the string was invalid.
+ */
+__rte_experimental
+int
+rte_arg_parse_arg_type(const char *core_string);
+
+/**
+ * Convert a string describing either a corelist or coremask into an array of
core ids.
+ *
+ * This function will fill the "cores" array up to "cores_len" with the core
ids described
+ * in the "core_string". The string can either describe a corelist or a
coremask, and
+ * will be parsed accordingly. The number of unique core ids in the string is
then returned.
+ * For example:
+ * "1-4" is treated as a corelist and results in an array of [1,2,3,4] with 4
being returned
+ * "0xA1" is treated as a coremask and results in an array of [0,5,7] with 3
being returned
+ *
+ * In the case of an ambiguous string, the function will use the default_type
parameter to
+ * decide.
+ *
+ * NOTE: if the length of the input array is insufficient to hold the number
of core ids
+ * in "core_string" the input array is filled to capacity but the return value
is the
+ * number of elements which would have been written to the array, had enough
space been
+ * available. [This is similar to the behaviour of the snprintf function].
Because of
+ * this, the number of core values in the "core_string" may be determined by
calling the
+ * function with a NULL array pointer and array length given as 0.
+ *
+ * @param core_string
+ * A string describing the intended cores to be parsed.
+ * @param cores
+ * An array where to store the core ids.
+ * Array can be NULL if "cores_len" is 0.
+ * @param cores_len
+ * The length of the "cores" array.
+ * If the size is smaller than that needed to hold all cores from
"core_string"
+ * @param default_type
+ * How to treat ambiguous cases (e.g. '4' could be mask or list).
+ * RTE_ARG_PARSE_TYPE_COREMASK: coremask.
+ * RTE_ARG_PARSE_TYPE_CORELIST: corelist.
+ * @return
+ * n: the number of unique cores present in "core_string".
+ * -EINVAL if the string was invalid.
+ * NOTE: if n > "cores_len", then only "cores_len" elements in the "cores"
array are valid.
+ */
+__rte_experimental
+int
+rte_arg_parse_core_string(const char *core_string, uint16_t *cores, uint32_t
cores_len,
+ int default_type);
#ifdef __cplusplus
}
diff --git a/lib/arg_parser/version.map b/lib/arg_parser/version.map
index b44d4b02b7..1e54b91dae 100644
--- a/lib/arg_parser/version.map
+++ b/lib/arg_parser/version.map
@@ -6,6 +6,8 @@ EXPERIMENTAL {
global:
# added in 24.03
+ rte_arg_parse_arg_type;
rte_arg_parse_corelist;
rte_arg_parse_coremask;
+ rte_arg_parse_core_string;
};
--
2.34.1
