Add resource-hash: a little executable to copute the 64-bit hash of a resource name; needed by next commit ;)

tools/resource-compilers/resource-hash.cpp

@@ -0,0 +1,117 @@
+#include <stdio.h>
+#include <stdlib.h>
+
+#include "Crown.h"
+
+using namespace crown;
+
+const char* resource_in = NULL;
+const char* resource_out = NULL;
+uint32_t hash_seed = 0;
+
+void print_help_message(const char* program_name);
+void parse_command_line(int argc, char** argv);
+
+/// Generates 64bit hash for the specified resource based on a seed
+int main(int argc, char** argv)
+{
+	parse_command_line(argc, argv);
+
+	char resource_basename[256];
+	char resource_extension[256];
+	
+	path::filename_without_extension(resource_in, resource_basename, 256);
+	path::extension(resource_in, resource_extension, 256);
+	
+	uint32_t resource_basename_hash = hash::murmur2_32(resource_basename, string::strlen(resource_basename), hash_seed);
+	uint32_t resource_extension_hash = hash::murmur2_32(resource_extension, string::strlen(resource_extension), hash_seed);
+
+	char out_filename[512];
+	out_filename[0] = '\0';
+
+	snprintf(resource_basename, 256, "%X", resource_basename_hash);
+	snprintf(resource_extension, 256, "%X", resource_extension_hash);
+	
+	string::strncat(out_filename, resource_basename, 512);
+	string::strncat(out_filename, resource_extension, 512);
+
+	resource_out = out_filename;
+
+	printf("%s\n", resource_out);
+
+	return 0;
+}
+
+//-----------------------------------------------------------------------------
+void parse_command_line(int argc, char** argv)
+{
+	// Parse arguments
+	ArgsOption options[] = 
+	{
+		"help",         AOA_NO_ARGUMENT,       NULL,        'h',
+		"resource-in",  AOA_REQUIRED_ARGUMENT, NULL,        'i',
+		"seed",         AOA_REQUIRED_ARGUMENT, NULL,        's',
+		NULL, 0, NULL, 0
+	};
+
+	Args args(argc, argv, "", options);
+
+	while (1)
+	{
+		int32_t ret = args.next_option();
+		
+		switch (ret)
+		{
+			case -1:
+			{
+				return;
+			}
+			// Help message
+			case 'h':
+			{
+				print_help_message(argv[0]);
+				exit(0);
+			}
+			// Resource in
+			case 'i':
+			{
+				if (args.option_argument() == NULL)
+				{
+					printf("%s: ERROR: missing path after `--resource-in`\n", argv[0]);
+					exit(-1);
+				}
+				
+				resource_in = args.option_argument();
+				
+				break;
+			}
+			case 's':
+			{
+				if (args.option_argument() == NULL)
+				{
+					printf("%s: ERROR: missing seed value after `--seed`\n", argv[0]);
+					exit(-1);
+				}
+
+				hash_seed = atoi(args.option_argument());
+
+				break;
+			}
+			default:
+			{
+				break;
+			}
+		}
+	}
+}
+
+//-----------------------------------------------------------------------------
+void print_help_message(const char* program_name)
+{
+	printf("Usage: %s [options]\n", program_name);
+	printf("Options:\n\n");
+
+	printf("  --help                  Show this help.\n");
+	printf("  --resource-in <name>    The <name> of the input resource.\n");
+	printf("  --seed <value>          The unsigned integer <value> of the hash seed.\n");
+}