repos/simple16: src/asm.c comparison

Added incbin directive to assembler

author	Michael Pavone <pavone@retrodev.com>
date	Sun, 03 Apr 2016 18:37:01 -0700
parents	fb14515266f4
children	718aaedc4582

comparison

equal deleted inserted replaced

-:c677507682e3
+:5a8b5f9fc50a
 	}
 	diff &= 0x1FE;
 	uint16_t inst = BCC | diff << 3 | intcc << 12;
 	outbuf[pc] = inst >> 8;
 	outbuf[pc+1] = inst;
+	return 1;
+}
+uint8_t handle_incbin(char *cur, uint8_t *outbuf, uint16_t *pc)
+{
+	char * end = strchr(cur, ';');
+	if (end) {
+		*end = 0;
+	} else {
+		end = cur + strlen(cur);
+	}
+	while (end - cur > 1 && isspace(*(end-1)))
+	{
+		end--;
+	}
+	*end = 0;
+	FILE *incfile = fopen(cur, "rb");
+	if (!incfile) {
+		fprintf(stderr, "Failed to open inclued file %s for reading\n", cur);
+		return 0;
+	}
+	size_t read = fread(outbuf + *pc, 1, 48*1024-*pc, incfile);
+	fclose(incfile);
+	*pc += read;
 	return 1;
 }
 uint8_t assemble_file(FILE *input, FILE *output)
 {
 			if (!handle_dc(mnemonic[3], cur, outbuf, &pc, &labels)) {
 				goto error;
 			}
 			continue;
 		}
+		if (!strcmp(mnemonic, "incbin")) {
+			if (!handle_incbin(cur, outbuf, &pc)) {
+				goto error;
+			}
+			continue;
+		}
 		//automatically align to word boundary
 		if (pc & 1) {
 			outbuf[pc] = 0;
 			pc++;
 		}

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