size_t duk_hbuffer_insert_cstring(duk_hthread *thr, duk_hbuffer_dynamic *buf, size_t offset, const char *str) {
size_t len;
DUK_ASSERT(thr != NULL);
DUK_ASSERT(buf != NULL);
DUK_ASSERT(str != NULL);
DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC(buf));
len = DUK_STRLEN(str);
duk_hbuffer_insert_bytes(thr, buf, offset, (duk_uint8_t *) str, len);
return len;
}
DUK_EXTERNAL duk_int_t duk_compile_raw(duk_context *ctx, const char *src_buffer, duk_size_t src_length, duk_uint_t flags) {
duk__compile_raw_args comp_args_alloc;
duk__compile_raw_args *comp_args = &comp_args_alloc;
DUK_ASSERT_CTX_VALID(ctx);
if ((flags & DUK_COMPILE_STRLEN) && (src_buffer != NULL)) {
/* String length is computed here to avoid multiple evaluation
* of a macro argument in the calling side.
*/
src_length = DUK_STRLEN(src_buffer);
}
comp_args->src_buffer = (const duk_uint8_t *) src_buffer;
comp_args->src_length = src_length;
comp_args->flags = flags;
/* [ ... source? filename? ] (depends on flags) */
if (flags & DUK_COMPILE_SAFE) {
duk_int_t rc;
duk_int_t nargs;
duk_int_t nrets = 1;
/* Arguments can be: [ source? filename? &comp_args] so that
* nargs is 1 to 3. Call site encodes the correct nargs count
* directly into flags.
*/
nargs = flags & 0x07;
DUK_ASSERT(nargs == ((flags & DUK_COMPILE_NOSOURCE) ? 0 : 1) +
((flags & DUK_COMPILE_NOFILENAME) ? 0 : 1));
rc = duk_safe_call(ctx, duk__do_compile, (void *) comp_args, nargs, nrets);
/* [ ... closure ] */
return rc;
}
(void) duk__do_compile(ctx, (void *) comp_args);
/* [ ... closure ] */
return DUK_EXEC_SUCCESS;
}
DUK_EXTERNAL duk_int_t duk_compile_raw(duk_context *ctx, const char *src_buffer, duk_size_t src_length, duk_uint_t flags) {
duk__compile_raw_args comp_args_alloc;
duk__compile_raw_args *comp_args = &comp_args_alloc;
if ((flags & DUK_COMPILE_STRLEN) && (src_buffer != NULL)) {
/* String length is computed here to avoid multiple evaluation
* of a macro argument in the calling side.
*/
src_length = DUK_STRLEN(src_buffer);
}
comp_args->src_buffer = (const duk_uint8_t *) src_buffer;
comp_args->src_length = src_length;
comp_args->flags = flags;
duk_push_pointer(ctx, (void *) comp_args);
/* [ ... source? filename &comp_args ] (depends on flags) */
if (flags & DUK_COMPILE_SAFE) {
duk_int_t rc;
duk_int_t nargs;
duk_int_t nrets = 1;
/* Arguments are either: [ filename &comp_args ] or [ source filename &comp_args ] */
nargs = (flags & DUK_COMPILE_NOSOURCE) ? 2 : 3;
rc = duk_safe_call(ctx, duk__do_compile, nargs, nrets);
/* [ ... closure ] */
return rc;
}
(void) duk__do_compile(ctx);
/* [ ... closure ] */
return DUK_EXEC_SUCCESS;
}
duk_hstring *duk_heap_string_intern_u32(duk_heap *heap, duk_uint32_t val) {
char buf[DUK_STRTAB_U32_MAX_STRLEN+1];
DUK_SNPRINTF(buf, sizeof(buf), "%u", (unsigned int) val);
buf[sizeof(buf) - 1] = (char) 0;
return duk_heap_string_intern(heap, (duk_uint8_t *) buf, DUK_STRLEN(buf));
}
DUK_INTERNAL void duk_fb_put_cstring(duk_fixedbuffer *fb, const char *x) {
duk_fb_put_bytes(fb, (const duk_uint8_t *) x, (duk_size_t) DUK_STRLEN(x));
}
/* Log frontend shared helper, magic value indicates log level. Provides
* frontend functions: trace(), debug(), info(), warn(), error(), fatal().
* This needs to have small footprint, reasonable performance, minimal
* memory churn, etc.
*/
DUK_INTERNAL duk_ret_t duk_bi_logger_prototype_log_shared(duk_context *ctx) {
duk_hthread *thr = (duk_hthread *) ctx;
duk_double_t now;
duk_small_int_t entry_lev = duk_get_current_magic(ctx);
duk_small_int_t logger_lev;
duk_int_t nargs;
duk_int_t i;
duk_size_t tot_len;
const duk_uint8_t *arg_str;
duk_size_t arg_len;
duk_uint8_t *buf, *p;
const duk_uint8_t *q;
duk_uint8_t date_buf[DUK_BI_DATE_ISO8601_BUFSIZE];
duk_size_t date_len;
duk_small_int_t rc;
DUK_ASSERT(entry_lev >= 0 && entry_lev <= 5);
/* XXX: sanitize to printable (and maybe ASCII) */
/* XXX: better multiline */
/*
* Logger arguments are:
*
* magic: log level (0-5)
* this: logger
* stack: plain log args
*
* We want to minimize memory churn so a two-pass approach
* is used: first pass formats arguments and computes final
* string length, second pass copies strings either into a
* pre-allocated and reused buffer (short messages) or into a
* newly allocated fixed buffer. If the backend function plays
* nice, it won't coerce the buffer to a string (and thus
* intern it).
*/
nargs = duk_get_top(ctx);
/* [ arg1 ... argN this ] */
/*
* Log level check
*/
duk_push_this(ctx);
duk_get_prop_stridx(ctx, -1, DUK_STRIDX_LC_L);
logger_lev = (duk_small_int_t) duk_get_int(ctx, -1);
if (entry_lev < logger_lev) {
return 0;
}
/* log level could be popped but that's not necessary */
now = duk_bi_date_get_now(ctx);
duk_bi_date_format_timeval(now, date_buf);
date_len = DUK_STRLEN((const char *) date_buf);
duk_get_prop_stridx(ctx, -2, DUK_STRIDX_LC_N);
duk_to_string(ctx, -1);
DUK_ASSERT(duk_is_string(ctx, -1));
/* [ arg1 ... argN this loggerLevel loggerName ] */
/*
* Pass 1
*/
/* Line format: <time> <entryLev> <loggerName>: <msg> */
tot_len = 0;
tot_len += 3 + /* separators: space, space, colon */
3 + /* level string */
date_len + /* time */
duk_get_length(ctx, -1); /* loggerName */
for (i = 0; i < nargs; i++) {
/* When formatting an argument to a string, errors may happen from multiple
* causes. In general we want to catch obvious errors like a toLogString()
* throwing an error, but we don't currently try to catch every possible
* error. In particular, internal errors (like out of memory or stack) are
* not caught. Also, we expect Error toString() to not throw an error.
*/
if (duk_is_object(ctx, i)) {
/* duk_pcall_prop() may itself throw an error, but we're content
* in catching the obvious errors (like toLogString() throwing an
* error).
*/
duk_push_hstring_stridx(ctx, DUK_STRIDX_FMT);
duk_dup(ctx, i);
/* [ arg1 ... argN this loggerLevel loggerName 'fmt' arg ] */
/* call: this.fmt(arg) */
rc = duk_pcall_prop(ctx, -5 /*obj_index*/, 1 /*nargs*/);
if (rc) {
/* Keep the error as the result (coercing it might fail below,
* but we don't catch that now).
*/
;
}
duk_replace(ctx, i);
}
(void) duk_to_lstring(ctx, i, &arg_len);
tot_len++; /* sep (even before first one) */
tot_len += arg_len;
}
/*
* Pass 2
*/
if (tot_len <= DUK_BI_LOGGER_SHORT_MSG_LIMIT) {
duk_hbuffer_dynamic *h_buf;
DUK_DDD(DUK_DDDPRINT("reuse existing small log message buffer, tot_len %ld", (long) tot_len));
/* We can assert for all buffer properties because user code
* never has access to heap->log_buffer.
*/
DUK_ASSERT(thr != NULL);
DUK_ASSERT(thr->heap != NULL);
h_buf = thr->heap->log_buffer;
DUK_ASSERT(h_buf != NULL);
DUK_ASSERT(DUK_HBUFFER_HAS_DYNAMIC((duk_hbuffer *) h_buf));
DUK_ASSERT(DUK_HBUFFER_DYNAMIC_GET_ALLOC_SIZE(h_buf) == DUK_BI_LOGGER_SHORT_MSG_LIMIT);
/* Set buffer 'visible size' to actual message length and
* push it to the stack.
*/
DUK_HBUFFER_SET_SIZE((duk_hbuffer *) h_buf, tot_len);
duk_push_hbuffer(ctx, (duk_hbuffer *) h_buf);
buf = (duk_uint8_t *) DUK_HBUFFER_DYNAMIC_GET_DATA_PTR(thr->heap, h_buf);
} else {
DUK_DDD(DUK_DDDPRINT("use a one-off large log message buffer, tot_len %ld", (long) tot_len));
buf = (duk_uint8_t *) duk_push_fixed_buffer(ctx, tot_len);
}
DUK_ASSERT(buf != NULL);
p = buf;
DUK_MEMCPY((void *) p, (void *) date_buf, date_len);
p += date_len;
*p++ = (duk_uint8_t) DUK_ASC_SPACE;
q = duk__log_level_strings + (entry_lev * 3);
DUK_MEMCPY((void *) p, (void *) q, (duk_size_t) 3);
p += 3;
*p++ = (duk_uint8_t) DUK_ASC_SPACE;
arg_str = (const duk_uint8_t *) duk_get_lstring(ctx, -2, &arg_len);
DUK_MEMCPY((void *) p, (const void *) arg_str, arg_len);
p += arg_len;
*p++ = (duk_uint8_t) DUK_ASC_COLON;
for (i = 0; i < nargs; i++) {
*p++ = (duk_uint8_t) DUK_ASC_SPACE;
arg_str = (const duk_uint8_t *) duk_get_lstring(ctx, i, &arg_len);
DUK_ASSERT(arg_str != NULL);
DUK_MEMCPY((void *) p, (const void *) arg_str, arg_len);
p += arg_len;
}
DUK_ASSERT(buf + tot_len == p);
/* [ arg1 ... argN this loggerLevel loggerName buffer ] */
#if defined(DUK_USE_DEBUGGER_SUPPORT) && defined(DUK_USE_DEBUGGER_FWD_LOGGING)
/* Do debugger forwarding before raw() because the raw() function
* doesn't get the log level right now.
*/
if (DUK_HEAP_IS_DEBUGGER_ATTACHED(thr->heap)) {
const char *log_buf;
duk_size_t sz_buf;
log_buf = (const char *) duk_get_buffer(ctx, -1, &sz_buf);
DUK_ASSERT(log_buf != NULL);
duk_debug_write_notify(thr, DUK_DBG_CMD_LOG);
duk_debug_write_int(thr, (duk_int32_t) entry_lev);
duk_debug_write_string(thr, (const char *) log_buf, sz_buf);
duk_debug_write_eom(thr);
}
#endif
/* Call this.raw(msg); look up through the instance allows user to override
* the raw() function in the instance or in the prototype for maximum
* flexibility.
*/
duk_push_hstring_stridx(ctx, DUK_STRIDX_RAW);
duk_dup(ctx, -2);
/* [ arg1 ... argN this loggerLevel loggerName buffer 'raw' buffer ] */
duk_call_prop(ctx, -6, 1); /* this.raw(buffer) */
return 0;
}
DUK_INTERNAL duk_int_t duk_debug_vsnprintf(char *str, duk_size_t size, const char *format, va_list ap) {
duk_fixedbuffer fb;
const char *p = format;
const char *p_end = p + DUK_STRLEN(format);
duk_int_t retval;
DUK_MEMZERO(&fb, sizeof(fb));
fb.buffer = (duk_uint8_t *) str;
fb.length = size;
fb.offset = 0;
fb.truncated = 0;
while (p < p_end) {
char ch = *p++;
const char *p_begfmt = NULL;
duk_bool_t got_exclamation = 0;
duk_bool_t got_long = 0; /* %lf, %ld etc */
duk__dprint_state st;
if (ch != DUK_ASC_PERCENT) {
duk_fb_put_byte(&fb, (duk_uint8_t) ch);
continue;
}
/*
* Format tag parsing. Since we don't understand all the
* possible format tags allowed, we just scan for a terminating
* specifier and keep track of relevant modifiers that we do
* understand. See man 3 printf.
*/
DUK_MEMZERO(&st, sizeof(st));
st.fb = &fb;
st.depth = 0;
st.depth_limit = 1;
st.loop_stack_index = 0;
st.loop_stack_limit = DUK__LOOP_STACK_DEPTH;
p_begfmt = p - 1;
while (p < p_end) {
ch = *p++;
if (ch == DUK_ASC_STAR) {
/* unsupported: would consume multiple args */
goto format_error;
} else if (ch == DUK_ASC_PERCENT) {
duk_fb_put_byte(&fb, (duk_uint8_t) DUK_ASC_PERCENT);
break;
} else if (ch == DUK_ASC_EXCLAMATION) {
got_exclamation = 1;
} else if (!got_exclamation && ch == DUK_ASC_LC_L) {
got_long = 1;
} else if (got_exclamation && ch == DUK_ASC_LC_D) {
st.depth_limit = DUK__DEEP_DEPTH_LIMIT;
} else if (got_exclamation && ch == DUK_ASC_LC_P) {
st.follow_proto = 1;
} else if (got_exclamation && ch == DUK_ASC_LC_I) {
st.internal = 1;
} else if (got_exclamation && ch == DUK_ASC_LC_X) {
st.hexdump = 1;
} else if (got_exclamation && ch == DUK_ASC_LC_H) {
st.heavy = 1;
} else if (got_exclamation && ch == DUK_ASC_ATSIGN) {
st.pointer = 1;
} else if (got_exclamation && ch == DUK_ASC_HASH) {
st.binary = 1;
} else if (got_exclamation && ch == DUK_ASC_UC_T) {
duk_tval *t = va_arg(ap, duk_tval *);
if (st.pointer && !st.heavy) {
duk_fb_sprintf(&fb, "(%p)", (void *) t);
}
duk__print_tval(&st, t);
break;
} else if (got_exclamation && ch == DUK_ASC_UC_O) {
duk_heaphdr *t = va_arg(ap, duk_heaphdr *);
if (st.pointer && !st.heavy) {
duk_fb_sprintf(&fb, "(%p)", (void *) t);
}
duk__print_heaphdr(&st, t);
break;
} else if (got_exclamation && ch == DUK_ASC_UC_I) {