Created
February 5, 2014 04:00
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/** | |
* Disassemble a instruction | |
* Iseq -> Iseq inspect object | |
*/ | |
int | |
rb_iseq_disasm_insn(VALUE ret, VALUE *iseq, size_t pos, | |
rb_iseq_t *iseqdat, VALUE child) | |
{ | |
VALUE insn = iseq[pos]; | |
int len = insn_len(insn); | |
int j; | |
const char *types = insn_op_types(insn); | |
VALUE str = rb_str_new(0, 0); | |
const char *insn_name_buff; | |
insn_name_buff = insn_name(insn); | |
if (1) { | |
rb_str_catf(str, "%04"PRIdSIZE" %-16s ", pos, insn_name_buff); | |
} | |
else { | |
rb_str_catf(str, "%04"PRIdSIZE" %-16.*s ", pos, | |
(int)strcspn(insn_name_buff, "_"), insn_name_buff); | |
} | |
for (j = 0; types[j]; j++) { | |
const char *types = insn_op_types(insn); | |
VALUE opstr = rb_insn_operand_intern(iseqdat, insn, j, iseq[pos + j + 1], | |
len, pos, &iseq[pos + j + 2], | |
child); | |
rb_str_concat(str, opstr); | |
if (types[j + 1]) { | |
rb_str_cat2(str, ", "); | |
} | |
} | |
{ | |
unsigned int line_no = find_line_no(iseqdat, pos); | |
unsigned int prev = pos == 0 ? 0 : find_line_no(iseqdat, pos - 1); | |
if (line_no && line_no != prev) { | |
long slen = RSTRING_LEN(str); | |
slen = (slen > 70) ? 0 : (70 - slen); | |
str = rb_str_catf(str, "%*s(%4d)", (int)slen, "", line_no); | |
} | |
} | |
if (ret) { | |
rb_str_cat2(str, "\n"); | |
rb_str_concat(ret, str); | |
} | |
else { | |
printf("%s\n", RSTRING_PTR(str)); | |
} | |
return len; | |
} |
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