Implement parsing .rom_size directive.

src/assembler/parse_util.c

@@ -127,7 +127,24 @@ bool parse_uint8_t(uint8_t *result, const ASMLine *line, const char *directive)
 }
 
 /*
-    Parse the region code string in an ASMLine and store it in *result.
+    Parse a ROM size string in an ASMLine and store it in *result.
+
+    Return true on success and false on failure; in the latter case, *result is
+    not modified.
+*/
+bool parse_rom_size(uint32_t *result, const ASMLine *line)
+{
+    uint32_t bytes;
+    if (!parse_uint32_t(&bytes, line, DIR_ROM_SIZE))
+        return false;
+
+    if (size_bytes_to_code(bytes))
+        return (*result = bytes), true;
+    return false;
+}
+
+/*
+    Parse a region code string in an ASMLine and store it in *result.
 
     Return true on success and false on failure; in the latter case, *result is
     not modified.
@@ -155,7 +172,7 @@ bool parse_region_string(uint8_t *result, const ASMLine *line)
 }
 
 /*
-    Parse the size code in an ASMLine and store it in *result.
+    Parse a size code in an ASMLine and store it in *result.
 
     Return true on success and false on failure; in the latter case, *result is
     not modified.

src/assembler/parse_util.h

@@ -17,5 +17,6 @@ bool parse_uint32_t(uint32_t*, const ASMLine*, const char*);
 bool parse_uint16_t(uint16_t*, const ASMLine*, const char*);
 bool parse_uint8_t(uint8_t*, const ASMLine*, const char*);
 
+bool parse_rom_size(uint32_t*, const ASMLine*);
 bool parse_region_string(uint8_t*, const ASMLine*);
 bool parse_size_code(uint8_t*, const ASMLine*);

src/assembler/preprocessor.c

@@ -360,8 +360,7 @@ ErrorInfo* preprocess(AssemblerState *state, const LineBuffer *source)
         END_DIRECTIVE
 
         BEGIN_DIRECTIVE(DIR_ROM_SIZE, size_t, state->rom_size, 0)
-            // TODO: fixme
-            FAIL_ON_COND_(1, ED_PP_UNKNOWN)
+            USE_PARSER(uint32_t, rom_size)
         END_DIRECTIVE
 
         BEGIN_DIRECTIVE(DIR_ROM_HEADER, size_t, state->header.offset, DEFAULT_HEADER_OFFSET)