summaryrefslogtreecommitdiff
path: root/miscutils/bc.c
diff options
context:
space:
mode:
Diffstat (limited to 'miscutils/bc.c')
-rw-r--r--miscutils/bc.c64
1 files changed, 53 insertions, 11 deletions
diff --git a/miscutils/bc.c b/miscutils/bc.c
index 8685f2c..06fcc8e 100644
--- a/miscutils/bc.c
+++ b/miscutils/bc.c
@@ -167,10 +167,29 @@
# include "dc.c"
#else
-#if 0
-# define dbg_lex(...) bb_error_msg(__VA_ARGS__)
+#define DEBUG_LEXER 0
+
+#if DEBUG_LEXER
+static unsigned lex_indent;
+#define dbg_lex(...) \
+ do { \
+ fprintf(stderr, "%*s", lex_indent, ""); \
+ bb_error_msg(__VA_ARGS__); \
+ } while (0)
+#define dbg_lex_enter(...) \
+ do { \
+ dbg_lex(__VA_ARGS__); \
+ lex_indent++; \
+ } while (0)
+#define dbg_lex_done(...) \
+ do { \
+ lex_indent--; \
+ dbg_lex(__VA_ARGS__); \
+ } while (0)
#else
-# define dbg_lex(...) ((void)0)
+# define dbg_lex(...) ((void)0)
+# define dbg_lex_enter(...) ((void)0)
+# define dbg_lex_done(...) ((void)0)
#endif
typedef enum BcStatus {
@@ -2941,7 +2960,7 @@ static BC_STATUS zbc_lex_next(BcLex *l)
// is so the parser doesn't get inundated with whitespace.
s = BC_STATUS_SUCCESS;
do {
- dbg_lex("next token:'%.*s'",
+ dbg_lex("next string to parse:'%.*s'",
(int)(strchrnul(l->buf + l->i, '\n') - (l->buf + l->i)),
l->buf + l->i);
ERROR_RETURN(s =) zcommon_lex_token(l);
@@ -2954,7 +2973,7 @@ static BC_STATUS zbc_lex_next(BcLex *l)
# define zbc_lex_next(...) (zbc_lex_next(__VA_ARGS__), BC_STATUS_SUCCESS)
#endif
-static BC_STATUS zbc_lex_text(BcLex *l, const char *text)
+static BC_STATUS zbc_lex_text_init(BcLex *l, const char *text)
{
l->buf = text;
l->i = 0;
@@ -2963,7 +2982,7 @@ static BC_STATUS zbc_lex_text(BcLex *l, const char *text)
RETURN_STATUS(zbc_lex_next(l));
}
#if ERRORS_ARE_FATAL
-# define zbc_lex_text(...) (zbc_lex_text(__VA_ARGS__), BC_STATUS_SUCCESS)
+# define zbc_lex_text_init(...) (zbc_lex_text_init(__VA_ARGS__), BC_STATUS_SUCCESS)
#endif
#if ENABLE_BC
@@ -3431,7 +3450,11 @@ static void bc_parse_addFunc(BcParse *p, char *name, size_t *idx)
p->func = bc_program_func(p->fidx);
}
-#define bc_parse_push(p, i) bc_vec_pushByte(&(p)->func->code, (char) (i))
+static void bc_parse_push(BcParse *p, char i)
+{
+ dbg_lex("%s:%d pushing opcode %d", __func__, __LINE__, i);
+ bc_vec_pushByte(&p->func->code, i);
+}
static void bc_parse_pushName(BcParse *p, char *name)
{
@@ -3448,6 +3471,7 @@ static void bc_parse_pushIndex(BcParse *p, size_t idx)
size_t mask;
unsigned amt;
+ dbg_lex("%s:%d pushing index %d", __func__, __LINE__, idx);
mask = ((size_t)0xff) << (sizeof(idx) * 8 - 8);
amt = sizeof(idx);
do {
@@ -3504,7 +3528,7 @@ static BC_STATUS zbc_parse_text_init(BcParse *p, const char *text)
RETURN_STATUS(bc_error("file is not executable"));
}
- RETURN_STATUS(zbc_lex_text(&p->l, text));
+ RETURN_STATUS(zbc_lex_text_init(&p->l, text));
}
#if ERRORS_ARE_FATAL
# define zbc_parse_text_init(...) (zbc_parse_text_init(__VA_ARGS__), BC_STATUS_SUCCESS)
@@ -3662,6 +3686,7 @@ static BC_STATUS zbc_parse_params(BcParse *p, uint8_t flags)
bool comma = false;
size_t nparams;
+ dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
s = zbc_lex_next(&p->l);
if (s) RETURN_STATUS(s);
@@ -4140,6 +4165,7 @@ static BC_STATUS zbc_parse_if(BcParse *p)
BcStatus s;
BcInstPtr ip;
+ dbg_lex_enter("%s:%d entered", __func__, __LINE__);
s = zbc_lex_next(&p->l);
if (s) RETURN_STATUS(s);
if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
@@ -4162,6 +4188,7 @@ static BC_STATUS zbc_parse_if(BcParse *p)
bc_vec_push(&p->func->labels, &ip.idx);
bc_parse_startBody(p, BC_PARSE_FLAG_IF);
+ dbg_lex_done("%s:%d done", __func__, __LINE__);
RETURN_STATUS(BC_STATUS_SUCCESS);
}
#if ERRORS_ARE_FATAL
@@ -4173,6 +4200,7 @@ static BC_STATUS zbc_parse_else(BcParse *p)
{
BcInstPtr ip;
+ dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
if (!BC_PARSE_IF_END(p)) RETURN_STATUS(bc_error_bad_token());
ip.idx = p->func->labels.len;
@@ -4238,6 +4266,7 @@ static BC_STATUS zbc_parse_for(BcParse *p)
BcInstPtr ip;
size_t cond_idx, exit_idx, body_idx, update_idx;
+ dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
s = zbc_lex_next(&p->l);
if (s) RETURN_STATUS(s);
if (p->l.t.t != BC_LEX_LPAREN) RETURN_STATUS(bc_error_bad_token());
@@ -4521,6 +4550,7 @@ static BC_STATUS zbc_parse_stmt(BcParse *p)
{
BcStatus s = BC_STATUS_SUCCESS;
+ dbg_lex_enter("%s:%d entered, p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
switch (p->l.t.t) {
case BC_LEX_NLINE:
RETURN_STATUS(zbc_lex_next(&p->l));
@@ -4550,6 +4580,7 @@ static BC_STATUS zbc_parse_stmt(BcParse *p)
break;
}
+ dbg_lex("%s:%d p->l.t.t:%d", __func__, __LINE__, p->l.t.t);
switch (p->l.t.t) {
case BC_LEX_OP_INC:
case BC_LEX_OP_DEC:
@@ -4628,6 +4659,7 @@ static BC_STATUS zbc_parse_stmt(BcParse *p)
break;
}
+ dbg_lex_done("%s:%d done", __func__, __LINE__);
RETURN_STATUS(s);
}
#if ERRORS_ARE_FATAL
@@ -4638,20 +4670,25 @@ static BC_STATUS zbc_parse_parse(BcParse *p)
{
BcStatus s;
+ dbg_lex_enter("%s:%d entered", __func__, __LINE__);
if (p->l.t.t == BC_LEX_EOF)
s = p->flags.len > 0 ? bc_error("block end could not be found") : bc_error("end of file");
else if (p->l.t.t == BC_LEX_KEY_DEFINE) {
+ dbg_lex("%s:%d p->l.t.t:BC_LEX_KEY_DEFINE", __func__, __LINE__);
if (!BC_PARSE_CAN_EXEC(p))
RETURN_STATUS(bc_error_bad_token());
s = zbc_parse_func(p);
- } else
+ } else {
+ dbg_lex("%s:%d p->l.t.t:%d (not BC_LEX_KEY_DEFINE)", __func__, __LINE__, p->l.t.t);
s = zbc_parse_stmt(p);
+ }
if (s || G_interrupt) {
bc_parse_reset(p);
s = BC_STATUS_FAILURE;
}
+ dbg_lex_done("%s:%d done", __func__, __LINE__);
RETURN_STATUS(s);
}
#if ERRORS_ARE_FATAL
@@ -6919,14 +6956,18 @@ static unsigned bc_vm_envLen(const char *var)
static BC_STATUS zbc_vm_process(const char *text)
{
- BcStatus s = zbc_parse_text_init(&G.prs, text);
+ BcStatus s;
+ dbg_lex_enter("%s:%d entered", __func__, __LINE__);
+ s = zbc_parse_text_init(&G.prs, text);
if (s) RETURN_STATUS(s);
while (G.prs.l.t.t != BC_LEX_EOF) {
+ dbg_lex("%s:%d G.prs.l.t.t:%d", __func__, __LINE__, G.prs.l.t.t);
ERROR_RETURN(s =) zcommon_parse(&G.prs);
if (s) RETURN_STATUS(s);
}
+ dbg_lex("%s:%d G.prs.l.t.t:BC_LEX_EOF", __func__, __LINE__);
if (BC_PARSE_CAN_EXEC(&G.prs)) {
s = zbc_program_exec();
@@ -6935,6 +6976,7 @@ static BC_STATUS zbc_vm_process(const char *text)
bc_program_reset();
}
+ dbg_lex_done("%s:%d done", __func__, __LINE__);
RETURN_STATUS(s);
}
#if ERRORS_ARE_FATAL
@@ -7324,7 +7366,7 @@ static BC_STATUS zbc_vm_exec(void)
// thus error checking is normally disabled.
# define DEBUG_LIB 0
bc_lex_file(&G.prs.l);
- ERROR_RETURN(s =) zbc_vm_process(bc_lib);
+ s = zbc_vm_process(bc_lib);
if (DEBUG_LIB && s) RETURN_STATUS(s);
}
#endif
generated by cgit v1.1 at 2024-10-30 21:36:09 +0000