[dpdk-dev] [PATCH v2 1/7] eal: add wrappers for POSIX string functions

[Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>]

POSIX strncasecmp(), strdup(), and strtok_r() have different names
on Windows, respectively, strnicmp(), _strdup(), and strtok_s().

Add wrappers as inline functions, because they're used from librte_kvargs,
and thus cannot be in librte_eal; besides, implementation is trivial.

Signed-off-by: Dmitry Kozlyuk <dmitry.kozliuk@gmail.com>
---
 lib/librte_eal/common/eal_common_dev.c        |  6 +--
 lib/librte_eal/common/eal_common_devargs.c    |  7 ++--
 lib/librte_eal/common/eal_common_log.c        |  5 ++-
 lib/librte_eal/common/eal_common_options.c    | 12 +++---
 lib/librte_eal/common/eal_common_trace_ctf.c  |  2 +-
 .../common/eal_common_trace_utils.c           |  2 +-
 lib/librte_eal/include/rte_string_fns.h       | 42 +++++++++++++++++++
 7 files changed, 60 insertions(+), 16 deletions(-)

diff --git a/lib/librte_eal/common/eal_common_dev.c b/lib/librte_eal/common/eal_common_dev.c
index 8a3bd3100..0a15fdcf7 100644
--- a/lib/librte_eal/common/eal_common_dev.c
+++ b/lib/librte_eal/common/eal_common_dev.c
@@ -462,7 +462,7 @@ rte_dev_event_callback_register(const char *device_name,
 			if (!device_name) {
 				event_cb->dev_name = NULL;
 			} else {
-				event_cb->dev_name = strdup(device_name);
+				event_cb->dev_name = rte_strdup(device_name);
 				if (event_cb->dev_name == NULL) {
 					ret = -ENOMEM;
 					goto error;
@@ -630,10 +630,10 @@ dev_str_sane_copy(const char *str)
 
 	end = strcspn(str, ",/");
 	if (str[end] == ',') {
-		copy = strdup(&str[end + 1]);
+		copy = rte_strdup(&str[end + 1]);
 	} else {
 		/* '/' or '\0' */
-		copy = strdup("");
+		copy = rte_strdup("");
 	}
 	if (copy == NULL) {
 		rte_errno = ENOMEM;
diff --git a/lib/librte_eal/common/eal_common_devargs.c b/lib/librte_eal/common/eal_common_devargs.c
index fcf3d9a3c..14e082a27 100644
--- a/lib/librte_eal/common/eal_common_devargs.c
+++ b/lib/librte_eal/common/eal_common_devargs.c
@@ -18,6 +18,7 @@
 #include <rte_errno.h>
 #include <rte_kvargs.h>
 #include <rte_log.h>
+#include <rte_string_fns.h>
 #include <rte_tailq.h>
 #include "eal_private.h"
 
@@ -75,7 +76,7 @@ rte_devargs_layers_parse(struct rte_devargs *devargs,
 	 * anything and keep referring only to it.
 	 */
 	if (devargs->data != devstr) {
-		devargs->data = strdup(devstr);
+		devargs->data = rte_strdup(devstr);
 		if (devargs->data == NULL) {
 			RTE_LOG(ERR, EAL, "OOM\n");
 			ret = -ENOMEM;
@@ -219,9 +220,9 @@ rte_devargs_parse(struct rte_devargs *da, const char *dev)
 	da->bus = bus;
 	/* Parse eventual device arguments */
 	if (devname[i] == ',')
-		da->args = strdup(&devname[i + 1]);
+		da->args = rte_strdup(&devname[i + 1]);
 	else
-		da->args = strdup("");
+		da->args = rte_strdup("");
 	if (da->args == NULL) {
 		RTE_LOG(ERR, EAL, "not enough memory to parse arguments\n");
 		return -ENOMEM;
diff --git a/lib/librte_eal/common/eal_common_log.c b/lib/librte_eal/common/eal_common_log.c
index c5554badb..557a8243f 100644
--- a/lib/librte_eal/common/eal_common_log.c
+++ b/lib/librte_eal/common/eal_common_log.c
@@ -14,6 +14,7 @@
 #include <rte_eal.h>
 #include <rte_log.h>
 #include <rte_per_lcore.h>
+#include <rte_string_fns.h>
 
 #include "eal_private.h"
 
@@ -194,7 +195,7 @@ static int rte_log_save_level(int priority,
 		if (regcomp(&opt_ll->re_match, regex, 0) != 0)
 			goto fail;
 	} else if (pattern) {
-		opt_ll->pattern = strdup(pattern);
+		opt_ll->pattern = rte_strdup(pattern);
 		if (opt_ll->pattern == NULL)
 			goto fail;
 	} else
@@ -270,7 +271,7 @@ rte_log_lookup(const char *name)
 static int
 __rte_log_register(const char *name, int id)
 {
-	char *dup_name = strdup(name);
+	char *dup_name = rte_strdup(name);
 
 	if (dup_name == NULL)
 		return -ENOMEM;
diff --git a/lib/librte_eal/common/eal_common_options.c b/lib/librte_eal/common/eal_common_options.c
index 622c7bc42..3612ad441 100644
--- a/lib/librte_eal/common/eal_common_options.c
+++ b/lib/librte_eal/common/eal_common_options.c
@@ -228,7 +228,7 @@ eal_save_args(int argc, char **argv)
 		return -1;
 
 	for (i = 0; i < argc; i++) {
-		eal_args[i] = strdup(argv[i]);
+		eal_args[i] = rte_strdup(argv[i]);
 		if (strcmp(argv[i], "--") == 0)
 			break;
 	}
@@ -243,7 +243,7 @@ eal_save_args(int argc, char **argv)
 		return -1;
 
 	for (j = 0; i < argc; j++, i++)
-		eal_app_args[j] = strdup(argv[i]);
+		eal_app_args[j] = rte_strdup(argv[i]);
 	eal_app_args[j] = NULL;
 
 	return 0;
@@ -1273,7 +1273,7 @@ eal_parse_log_level(const char *arg)
 	char *str, *level;
 	int priority;
 
-	str = strdup(arg);
+	str = rte_strdup(arg);
 	if (str == NULL)
 		return -1;
 
@@ -1324,11 +1324,11 @@ eal_parse_log_level(const char *arg)
 static enum rte_proc_type_t
 eal_parse_proc_type(const char *arg)
 {
-	if (strncasecmp(arg, "primary", sizeof("primary")) == 0)
+	if (rte_strncasecmp(arg, "primary", sizeof("primary")) == 0)
 		return RTE_PROC_PRIMARY;
-	if (strncasecmp(arg, "secondary", sizeof("secondary")) == 0)
+	if (rte_strncasecmp(arg, "secondary", sizeof("secondary")) == 0)
 		return RTE_PROC_SECONDARY;
-	if (strncasecmp(arg, "auto", sizeof("auto")) == 0)
+	if (rte_strncasecmp(arg, "auto", sizeof("auto")) == 0)
 		return RTE_PROC_AUTO;
 
 	return RTE_PROC_INVALID;
diff --git a/lib/librte_eal/common/eal_common_trace_ctf.c b/lib/librte_eal/common/eal_common_trace_ctf.c
index 33e419aac..4041d9af6 100644
--- a/lib/librte_eal/common/eal_common_trace_ctf.c
+++ b/lib/librte_eal/common/eal_common_trace_ctf.c
@@ -398,7 +398,7 @@ char *trace_metadata_fixup_field(const char *field)
 	if (strstr(field, ".") == NULL && strstr(field, "->") == NULL)
 		return NULL;
 
-	out = strdup(field);
+	out = rte_strdup(field);
 	if (out == NULL)
 		return NULL;
 	p = out;
diff --git a/lib/librte_eal/common/eal_common_trace_utils.c b/lib/librte_eal/common/eal_common_trace_utils.c
index 64f58fb66..d541a5ea9 100644
--- a/lib/librte_eal/common/eal_common_trace_utils.c
+++ b/lib/librte_eal/common/eal_common_trace_utils.c
@@ -145,7 +145,7 @@ eal_trace_args_save(const char *val)
 		return -ENOMEM;
 	}
 
-	arg->val = strdup(val);
+	arg->val = rte_strdup(val);
 	if (arg->val == NULL) {
 		trace_err("failed to allocate memory for %s", val);
 		free(arg);
diff --git a/lib/librte_eal/include/rte_string_fns.h b/lib/librte_eal/include/rte_string_fns.h
index 8bac8243c..2d9d5afc8 100644
--- a/lib/librte_eal/include/rte_string_fns.h
+++ b/lib/librte_eal/include/rte_string_fns.h
@@ -116,6 +116,48 @@ rte_strlcat(char *dst, const char *src, size_t size)
 ssize_t
 rte_strscpy(char *dst, const char *src, size_t dsize);
 
+/**
+ * @internal
+ * strncasecmp(3) replacement for systems that don't have it.
+ */
+static inline int
+rte_strncasecmp(const char *s1, const char *s2, size_t size)
+{
+#ifdef RTE_EXEC_ENV_WINDOWS
+	return _strnicmp(s1, s2, size);
+#else
+	return strncasecmp(s1, s2, size);
+#endif
+}
+
+/**
+ * @internal
+ * strtor_r(3) replacement for systems that don't have it.
+ */
+static inline char *
+rte_strtok(char *str, const char *delim, char **saveptr)
+{
+#ifdef RTE_EXEC_ENV_WINDOWS
+	return strtok_s(str, delim, saveptr);
+#else
+	return strtok_r(str, delim, saveptr);
+#endif
+}
+
+/**
+ * @internal
+ * strdup(3) replacement for systems that don't have it.
+ */
+static inline char *
+rte_strdup(const char *str)
+{
+#ifdef RTE_EXEC_ENV_WINDOWS
+	return _strdup(str);
+#else
+	return strdup(str);
+#endif
+}
+
 #ifdef __cplusplus
 }
 #endif
-- 
2.29.2