X-Git-Url: http://git.subgeniuskitty.com/vvhitespace/.git/blobdiff_plain/b8b65c17f7c4cfbe7f1d2f6b76580d40afe51526..f10da6e3fe5928f0d15bc71487a4591e1fb2dbff:/vv_compiler.c

diff --git a/vv_compiler.c b/vv_compiler.c
index 9944070..e53f70d 100644
--- a/vv_compiler.c
+++ b/vv_compiler.c
@@ -25,9 +25,9 @@ print_usage(char ** argv)
     );
 }
 
-/* Allows building an ASCII string on the stack.                             */
-/* This syntax: A"test"                                                      */
-/* Results in five PUSH_IMMEDIATE commands for the four letters and newline. */
+/* Builds an ASCII string on the stack using VVS PUSH_IMMEDIATE commands.    */
+/* The syntax: A"test" results in six PUSH_IMMEDIATE commands for the four   */
+/*   letters, newline, and null-terminator.                                  */
 /* Expects 'input' to present a double-quoted ('"') ASCII string.            */
 /* The 'A' has already been chomped.                                         */
 void
@@ -35,7 +35,11 @@ parse_ascii_string(FILE * input, FILE * output)
 {
     uint8_t temp_byte;
     fread(&temp_byte, 1, 1, input);
-    if (temp_byte != '"') fprintf(stderr, "WARNING: Expected double-quote to begin string.\n");
+    if (temp_byte != '"') {
+        /* Die here since we walk the string backward and look for '"' as a terminator. */
+        fprintf(stderr, "ERROR: Expected double-quote to begin string.\n");
+        exit(EXIT_FAILURE);
+    }
 
     /* Put the letters on the stack in reverse. Don't forget to put a null-terminator first. */
     for (fread(&temp_byte,1,1,input); temp_byte != '"'; fread(&temp_byte,1,1,input)) continue;
@@ -45,7 +49,7 @@ parse_ascii_string(FILE * input, FILE * output)
         /* First, push three spaces to start a PUSH_IMMEDIATE command for a positive number. */
         uint8_t temp_output = ' ';
         for(int i=0;i<3;i++) fwrite(&temp_output, 1, 1, output);
-        /* Second, push the ASCII character, 7 bits total, most signficant bit first. */
+        /* Second, push the ASCII character, 7 bits total, most significant bit first. */
         /* Remember, [Tab]=1 and [Space]=0. */
         uint8_t index = 7; /* 7 bits needed per ASCII character. */
         while (index) {