add new error code CS_ERR_MEMSETUP to report error when user-defined …

…dynamic mem management is uninitialized

cs.c

@@ -38,7 +38,7 @@ unsigned int cs_version(int *major, int *minor)
 	return (CS_API_MAJOR << 8) + CS_API_MINOR;
 }
 
-bool cs_support(cs_arch arch)
+bool cs_support(int arch)
 {
 	if (arch == CS_ARCH_ALL)
 		return all_arch == ((1 << CS_ARCH_ARM) | (1 << CS_ARCH_ARM64) |
@@ -79,13 +79,20 @@ const char *cs_strerror(cs_err code)
 			return "Invalid option (CS_ERR_OPTION)";
 		case CS_ERR_DETAIL:
 			return "Details are unavailable (CS_ERR_DETAIL)";
+		case CS_ERR_MEMSETUP:
+			return "Dynamic memory management uninitialized (CS_ERR_MEMSETUP)";
 	}
 }
 
 cs_err cs_open(cs_arch arch, cs_mode mode, csh *handle)
 {
 	cs_struct *ud;
 
+	if (!my_malloc || !my_calloc || !my_realloc || !my_free)
+		// Error: before cs_open(), dynamic memory management must be initialized
+		// with cs_option(CS_OPT_MEM)
+		return CS_ERR_MEMSETUP;
+
 	ud = my_calloc(1, sizeof(*ud));
 	if (!ud) {
 		// memory insufficient

include/capstone.h

@@ -131,7 +131,6 @@ typedef struct cs_insn {
 	// Ascii text of instruction mnemonic
 	// This information is available even when CS_OPT_DETAIL = CS_OPT_OFF
 	char mnemonic[32];
-
 	// Ascii text of instruction operands
 	// This information is available even when CS_OPT_DETAIL = CS_OPT_OFF
 	char op_str[96];
@@ -160,6 +159,7 @@ typedef enum cs_err {
 	CS_ERR_MODE,	// Invalid/unsupported mode: cs_open()
 	CS_ERR_OPTION,	// Invalid/unsupported option: cs_option()
 	CS_ERR_DETAIL,	// Information is unavailable because detail option is OFF
+	CS_ERR_MEMSETUP, // Dynamic memory management uninitialized (see CS_OPT_MEM)
 } cs_err;
 
 /*