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-rw-r--r--Makefile2
-rw-r--r--cxrefbas.c170
-rw-r--r--linetab.c165
-rw-r--r--linetab.h22
4 files changed, 189 insertions, 170 deletions
diff --git a/Makefile b/Makefile
index f64b99c..a40e13c 100644
--- a/Makefile
+++ b/Makefile
@@ -59,7 +59,7 @@ dumpbas: bas.o
vxrefbas: bas.o
-cxrefbas: bas.o bcdfp.o
+cxrefbas: bas.o bcdfp.o linetab.o
bas.o: bas.c bas.h
diff --git a/cxrefbas.c b/cxrefbas.c
index 4598117..5111e18 100644
--- a/cxrefbas.c
+++ b/cxrefbas.c
@@ -7,175 +7,7 @@
#include "bas.h"
#include "bcdfp.h"
-
-typedef struct {
- unsigned short lineno;
- unsigned short pos;
- unsigned char cmd;
-} lineref_t;
-
-lineref_t *linerefs[32769];
-int refcounts[32769];
-int lines_exist[32769];
-unsigned char last_cmd, on_op;
-int last_cmd_pos;
-
-void add_lineref(unsigned short from, unsigned short pos) {
- lineref_t *p;
- int c;
- unsigned short to;
-
- to = fp2int(program + pos);
- if(to > 32767) return;
-
- p = linerefs[to];
- c = refcounts[to];
-
- if(c) {
- p = realloc(p, sizeof(lineref_t) * (c + 1));
- } else {
- p = malloc(sizeof(lineref_t));
- }
-
- if(!p) die("Out of memory.");
-
- linerefs[to] = p;
- linerefs[to][c].lineno = from;
- linerefs[to][c].pos = pos;
- linerefs[to][c].cmd = last_cmd;
- c++;
- refcounts[to] = c;
-}
-
-/* makes sure a numeric constant isn't start of an expression. */
-int is_standalone_num(unsigned short pos) {
- if(program[pos] != OP_NUMCONST) return 0;
- switch(program[pos + 7]) {
- case OP_EOS:
- case OP_EOL:
- case OP_COMMA:
- return 1;
- default:
- return 0;
- }
-}
-
-CALLBACK(start_stmt) {
- lines_exist[lineno] = 1;
-}
-
-CALLBACK(got_cmd) {
- last_cmd = tok;
- last_cmd_pos = pos;
- on_op = 0;
-}
-
-void computed_msg(unsigned short lineno) {
- static int last_lineno = -1;
- char *cmd;
-
- /* avoid duplicate warnings */
- if(lineno == last_lineno) return;
- last_lineno = lineno;
-
- switch(last_cmd) {
- case CMD_GOTO:
- cmd = "GOTO"; break;
- case CMD_GO_TO:
- cmd = "GO TO"; break;
- case CMD_GOSUB:
- cmd = "GOSUB"; break;
- case CMD_RESTORE:
- cmd = "RESTORE"; break;
- case CMD_TRAP:
- cmd = "TRAP"; break;
- /*
- case CMD_IF:
- cmd = "IF/THEN"; break;
- */
- case CMD_ON:
- if(on_op == OP_GOSUB)
- cmd = "ON/GOSUB";
- else
- cmd = "ON/GOTO";
- break;
- default: /* should never happen! */
- cmd = "???"; break;
- }
-
- fprintf(stderr, "Computed %s at line %d\n", cmd, lineno);
-}
-
-CALLBACK(got_var) {
- switch(last_cmd) {
- case CMD_GOTO:
- case CMD_GO_TO:
- case CMD_GOSUB:
- case CMD_RESTORE:
- case CMD_TRAP:
- computed_msg(lineno);
- break;
- default:
- break;
- }
-}
-
-CALLBACK(got_exp) {
- unsigned char last_tok = program[pos - 1];
- int standalone;
-
- if(last_cmd == CMD_ON) {
- if(tok == OP_GOTO || tok == OP_GOSUB)
- on_op = tok;
- }
-
- if(tok != OP_NUMCONST) return;
- standalone = is_standalone_num(pos);
-
- switch(last_cmd) {
- case CMD_GOTO:
- case CMD_GO_TO:
- case CMD_GOSUB:
- case CMD_RESTORE:
- case CMD_TRAP:
- if((pos == last_cmd_pos + 1) && standalone) {
- add_lineref(lineno, pos + 1);
- } else {
- computed_msg(lineno);
- }
- break;
- case CMD_IF:
- if(last_tok == OP_THEN) {
- add_lineref(lineno, pos + 1);
- }
- break;
- case CMD_ON: {
- switch(last_tok) {
- case OP_GOTO:
- case OP_GOSUB:
- case OP_COMMA:
- if(standalone)
- add_lineref(lineno, pos + 1);
- else
- computed_msg(lineno);
- break;
- default:
- break;
- }
- }
- break;
- default:
- break;
- }
-}
-
-void build_ref_table(void) {
- on_start_stmt = start_stmt;
- on_cmd_token = got_cmd;
- on_exp_token = got_exp;
- on_var_token = got_var;
- walk_all_code();
-}
+#include "linetab.h"
void print_ref_table(void) {
char c;
diff --git a/linetab.c b/linetab.c
new file mode 100644
index 0000000..c4fe392
--- /dev/null
+++ b/linetab.c
@@ -0,0 +1,165 @@
+#include "linetab.h"
+
+lineref_t *linerefs[32769];
+int refcounts[32769];
+int lines_exist[32769];
+unsigned char last_cmd, on_op;
+int last_cmd_pos;
+
+void add_lineref(unsigned short from, unsigned short pos) {
+ lineref_t *p;
+ int c;
+ unsigned short to;
+
+ to = fp2int(program + pos);
+ if(to > 32767) return;
+
+ p = linerefs[to];
+ c = refcounts[to];
+
+ if(c) {
+ p = realloc(p, sizeof(lineref_t) * (c + 1));
+ } else {
+ p = malloc(sizeof(lineref_t));
+ }
+
+ if(!p) die("Out of memory.");
+
+ linerefs[to] = p;
+ linerefs[to][c].lineno = from;
+ linerefs[to][c].pos = pos;
+ linerefs[to][c].cmd = last_cmd;
+ c++;
+ refcounts[to] = c;
+}
+
+/* makes sure a numeric constant isn't start of an expression. */
+int is_standalone_num(unsigned short pos) {
+ if(program[pos] != OP_NUMCONST) return 0;
+ switch(program[pos + 7]) {
+ case OP_EOS:
+ case OP_EOL:
+ case OP_COMMA:
+ return 1;
+ default:
+ return 0;
+ }
+}
+
+CALLBACK(start_stmt) {
+ lines_exist[lineno] = 1;
+}
+
+CALLBACK(got_cmd) {
+ last_cmd = tok;
+ last_cmd_pos = pos;
+ on_op = 0;
+}
+
+void computed_msg(unsigned short lineno) {
+ static int last_lineno = -1;
+ char *cmd;
+
+ /* avoid duplicate warnings */
+ if(lineno == last_lineno) return;
+ last_lineno = lineno;
+
+ switch(last_cmd) {
+ case CMD_GOTO:
+ cmd = "GOTO"; break;
+ case CMD_GO_TO:
+ cmd = "GO TO"; break;
+ case CMD_GOSUB:
+ cmd = "GOSUB"; break;
+ case CMD_RESTORE:
+ cmd = "RESTORE"; break;
+ case CMD_TRAP:
+ cmd = "TRAP"; break;
+ /*
+ case CMD_IF:
+ cmd = "IF/THEN"; break;
+ */
+ case CMD_ON:
+ if(on_op == OP_GOSUB)
+ cmd = "ON/GOSUB";
+ else
+ cmd = "ON/GOTO";
+ break;
+ default: /* should never happen! */
+ cmd = "???"; break;
+ }
+
+ fprintf(stderr, "Computed %s at line %d\n", cmd, lineno);
+}
+
+CALLBACK(got_var) {
+ switch(last_cmd) {
+ case CMD_GOTO:
+ case CMD_GO_TO:
+ case CMD_GOSUB:
+ case CMD_RESTORE:
+ case CMD_TRAP:
+ computed_msg(lineno);
+ break;
+ default:
+ break;
+ }
+}
+
+CALLBACK(got_exp) {
+ unsigned char last_tok = program[pos - 1];
+ int standalone;
+
+ if(last_cmd == CMD_ON) {
+ if(tok == OP_GOTO || tok == OP_GOSUB)
+ on_op = tok;
+ }
+
+ if(tok != OP_NUMCONST) return;
+ standalone = is_standalone_num(pos);
+
+ switch(last_cmd) {
+ case CMD_GOTO:
+ case CMD_GO_TO:
+ case CMD_GOSUB:
+ case CMD_RESTORE:
+ case CMD_TRAP:
+ if((pos == last_cmd_pos + 1) && standalone) {
+ add_lineref(lineno, pos + 1);
+ } else {
+ computed_msg(lineno);
+ }
+ break;
+ case CMD_IF:
+ if(last_tok == OP_THEN) {
+ add_lineref(lineno, pos + 1);
+ }
+ break;
+ case CMD_ON: {
+ switch(last_tok) {
+ case OP_GOTO:
+ case OP_GOSUB:
+ case OP_COMMA:
+ if(standalone)
+ add_lineref(lineno, pos + 1);
+ else
+ computed_msg(lineno);
+ break;
+ default:
+ break;
+ }
+ }
+ break;
+ default:
+ break;
+ }
+}
+
+void build_ref_table(void) {
+ on_start_stmt = start_stmt;
+ on_cmd_token = got_cmd;
+ on_exp_token = got_exp;
+ on_var_token = got_var;
+ walk_all_code();
+}
+
diff --git a/linetab.h b/linetab.h
new file mode 100644
index 0000000..c6aeb15
--- /dev/null
+++ b/linetab.h
@@ -0,0 +1,22 @@
+#include <stdio.h>
+#include <unistd.h>
+#include <stdlib.h>
+#include <string.h>
+#include <ctype.h>
+#include <time.h>
+
+#include "bas.h"
+#include "bcdfp.h"
+
+typedef struct {
+ unsigned short lineno;
+ unsigned short pos;
+ unsigned char cmd;
+} lineref_t;
+
+extern lineref_t *linerefs[];
+extern int refcounts[];
+extern int lines_exist[];
+
+extern void add_lineref(unsigned short from, unsigned short pos);
+extern void build_ref_table(void);
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