Add (optional) -w option to support 16-bit word output

bin2c.c

@@ -14,16 +14,21 @@
 #include <stdlib.h>
 #include <string.h>
 
+#define COLS	16
+
 #ifdef USE_BZ2
 #include <bzlib.h>
 #endif
 
 int
 main(int argc, char *argv[])
 {
-    char *buf;
-    char *ident;
-    unsigned int i, file_size, need_comma;
+    unsigned char *buf;
+    char array_name[80];
+    unsigned int i, file_size, file_count, need_comma;
+    int incr = 1;
+    int arg = 1;
+    const char* filename;
 
     FILE *f_input, *f_output;
 
@@ -33,14 +38,19 @@ main(int argc, char *argv[])
 #endif
 
     if (argc < 4) {
-        fprintf(stderr, "Usage: %s binary_file output_file array_name\n",
+        fprintf(stderr, "Usage: %s [-w] binary_file output_file [array_name]\n",
                 argv[0]);
         return -1;
     }
 
-    f_input = fopen(argv[1], "rb");
+    if (strcmp(argv[arg], "-w") == 0) {
+	++arg; incr = 2;
+    }
+
+    filename = argv[arg++];
+    f_input = fopen(filename, "rb");
     if (f_input == NULL) {
-        fprintf(stderr, "%s: can't open %s for reading\n", argv[0], argv[1]);
+        fprintf(stderr, "%s: can't open %s for reading\n", argv[0], filename);
         return -1;
     }
 
@@ -49,7 +59,7 @@ main(int argc, char *argv[])
     file_size = ftell(f_input);
     fseek(f_input, 0, SEEK_SET);
 
-    buf = (char *) malloc(file_size);
+    buf = (unsigned char *) malloc(file_size);
     assert(buf);
 
     fread(buf, file_size, 1, f_input);
@@ -79,32 +89,52 @@ main(int argc, char *argv[])
     buf = bz2_buf;
 #endif
 
-    f_output = fopen(argv[2], "w");
+    filename = argv[arg++];
+    f_output = fopen(filename, "w");
     if (f_output == NULL) {
-        fprintf(stderr, "%s: can't open %s for writing\n", argv[0], argv[1]);
+        fprintf(stderr, "%s: can't open %s for writing\n", argv[0], filename);
         return -1;
     }
 
-    ident = argv[3];
+	// Check if array_name passed on command line
+	if (arg < argc) {
+		strcpy(array_name, argv[argc]);
+	} else {
+		char ch;
+		strcpy(array_name, filename);
+		// Replace non-alphanumeric chars with underscore
+		for (i = 0; (ch = array_name[i]) != '\0'; ++i) {
+			if (!isalpha(ch) && !isdigit(ch)) {
+				array_name[i] = '_';
+			}
+		}
+
+	}
 
     need_comma = 0;
+
+	file_count = file_size / incr;
 
-    fprintf(f_output, "const char %s[%i] = {", ident, file_size);
-    for (i = 0; i < file_size; ++i) {
+	fprintf(f_output, "const unsigned short %s[%i] = {", array_name, file_count);
+    for (i = 0; i < file_size; i += incr) {
         if (need_comma)
             fprintf(f_output, ", ");
         else
             need_comma = 1;
-        if ((i % 11) == 0)
+        if ((i % COLS) == 0)
             fprintf(f_output, "\n\t");
-        fprintf(f_output, "0x%.2x", buf[i] & 0xff);
+	if (incr > 1) {
+	    fprintf(f_output, "0x%04x", buf[i] | (buf[i + 1] << 8));
+	} else {
+	    fprintf(f_output, "0x%02x", buf[i]);
+	}
     }
     fprintf(f_output, "\n};\n\n");
 
-    fprintf(f_output, "const int %s_length = %i;\n", ident, file_size);
+    fprintf(f_output, "const int %s_length = %i;\n", array_name, file_count);
 
 #ifdef USE_BZ2
-    fprintf(f_output, "const int %s_length_uncompressed = %i;\n", ident,
+    fprintf(f_output, "const int %s_length_uncompressed = %i;\n", array_name,
             uncompressed_size);
 #endif