conf: fix the export of safe_strto* functions from libasound

Only one library should define the safe_strto function. Export it
correctly and add _snd_ prefix to avoid possible clashes with the other
application code.

Fixes: 4725205 ("src/topology/parser.c: drop duplicate safe_strtol_base")
Fixes: #208
Signed-off-by: Jaroslav Kysela <perex@perex.cz>

include/local.h

@@ -232,10 +232,14 @@ size_t page_align(size_t size);
 size_t page_size(void);
 size_t page_ptr(size_t object_offset, size_t object_size, size_t *offset, size_t *mmap_offset);
 
-int safe_strtoll_base(const char *str, long long *val, int base);
+#define safe_strtoll_base _snd_safe_strtoll_base
+int _snd_safe_strtoll_base(const char *str, long long *val, int base);
 static inline int safe_strtoll(const char *str, long long *val) { return safe_strtoll_base(str, val, 0); }
-int safe_strtol_base(const char *str, long *val, int base);
+#define safe_strtol_base _snd_safe_strtol_base
+int _snd_safe_strtol_base(const char *str, long *val, int base);
 static inline int safe_strtol(const char *str, long *val) { return safe_strtol_base(str, val, 0); }
+#define safe_strtod _snd_safe_strtod
+int _snd_safe_strtod(const char *str, double *val);
 
 int snd_send_fd(int sock, void *data, size_t len, int fd);
 int snd_receive_fd(int sock, void *data, size_t len, int *fd);

src/Versions.in

@@ -134,3 +134,9 @@ ALSA_1.1.6 {
 
     @SYMBOL_PREFIX@snd_dlopen;
 } ALSA_0.9.7;
+
+ALSA_1.2.6 {
+  global:
+
+    @SYMBOL_PREFIX@_snd_safe_strto*;
+} ALSA_1.1.6;

src/conf.c

@@ -663,7 +663,7 @@ static int input_stdio_open(snd_input_t **inputp, const char *file,
 	return err;
 }
 
-int safe_strtoll_base(const char *str, long long *val, int base)
+int _snd_safe_strtoll_base(const char *str, long long *val, int base)
 {
 	char *end;
 	long v;
@@ -679,7 +679,7 @@ int safe_strtoll_base(const char *str, long long *val, int base)
 	return 0;
 }
 
-int safe_strtol_base(const char *str, long *val, int base)
+int _snd_safe_strtol_base(const char *str, long *val, int base)
 {
 	char *end;
 	long v;
@@ -695,7 +695,7 @@ int safe_strtol_base(const char *str, long *val, int base)
 	return 0;
 }
 
-static int safe_strtod(const char *str, double *val)
+int _snd_safe_strtod(const char *str, double *val)
 {
 	char *end;
 	double v;