Improve error messages of SSCANF

include/blc_tools.h

@@ -225,7 +225,7 @@ MANY_REALLOCATIONS(&values, 7);
 #define FSCANF(fields_nb, file, ... ) do{if (fscanf(file,  __VA_ARGS__) != fields_nb) EXIT_ON_ERROR("Failed reading %d fields.", fields_nb);}while(0)
 
 /// Do a fscanf checking than the number of interpreted arguments corresponds to the first parameter.
-#define SSCANF(fields_nb, string, ... ) do{if (sscanf(string,  __VA_ARGS__) != fields_nb) EXIT_ON_ERROR("Failed reading %d fields in '%s'.", fields_nb, string);}while(0)
+#define SSCANF(fields_nb, string, ... ) do{if (sscanf(string,  __VA_ARGS__) != fields_nb) EXIT_ON_ERROR("Failed reading %d fields in '%s' from buffer '%s'.", fields_nb, string,  STRINGIFY(string));}while(0)
 
 /// Like FSCANF but generates only a warning in case of error.
 #define TRY_FSCANF(fields_nb, file, ... ) do{if (fscanf(file, __VA_ARGS__) != fields_nb) PRINT_WARNING("Failed trying reading %d fields in '%s'.", fields_nb);}while(0)