code wiki / _hdl_build / nx_jq_locate.nx
`nx_jq_locate.nx` source

1// nx_jq_locate.nx -- find the EXACT construct where our parser rejects minified jQuery. Fetches jquery.min.js,
2// parses it RAW, and on PST_ERR prints the error token's source offset + the surrounding bytes -> identify+fix the
3// next parser gap directly (no guessing). Repeat (fix -> re-run) until "PARSED OK" -> then jQuery runs.
4import "nx_syscalls.nx"
5import "nx_x509_trust_store.nx"
6import "nx_trust_store_load_from_certdata.nx"
7import "nx_video_sniff.nx"
8import "nx_video_sniff_fetch.nx"
9const K_MAGIC_4194304: i64 = 4194304
10
11func cw(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8){n=n+1} sys_write(1,s,n); return 0 }
12func cn(v0: i64) -> i64 { let nb: *u8 = sys_mmap(32); var d: i64=0; var v: i64=v0; if v==0 { nb[0]=48; d=1 } else { let tmp: *u8=sys_mmap(32); var t: i64=0; while v>0 { tmp[t]=(48+(v%10)) as u8; v=v/10; t=t+1 } while t>0 { t=t-1; nb[d]=tmp[t]; d=d+1 } } nb[d]=0 as u8; cw(nb); return 0 }
13
14func main() -> i64 {
15    let r: i64 = nx_trust_store_load_from_certdata("data/mozilla_certdata.txt" as *u8, 512, K_MAGIC_4194304)
16    if r <= 0 { cw("certdata load failed\n" as *u8); sys_exit(1); return 1 }
17    let store: *TrustStore = r as *TrustStore
18    let status: *i64 = sys_mmap(8) as *i64
19    let jq: *u8 = sys_mmap(K_MAGIC_4194304)
20    let jn: i64 = nx_https_fetch_follow("https://code.jquery.com/jquery-3.7.1.min.js" as *u8, store, jq, K_MAGIC_4194304, 6, status)
21    cw("jquery bytes: " as *u8); cn(jn); cw("\n" as *u8)
22    if jn <= 0 { cw("(fetch failed)\n" as *u8); return 1 }
23    let ctxbox: *i64 = sys_mmap(16) as *i64
24    let prog: i64 = jp_parse_source(jq, jn, ctxbox)
25    let ctx: *i64 = (ctxbox[0]) as *i64
26    if (ctx as i64) == 0 { cw("ctx NULL (lex/parse aborted early)\n" as *u8); return 1 }
27    let pst: *i64 = jp_pst(ctx)
28    if pst[PST_ERR] != 1 { cw("PARSED OK (no PST_ERR) -- jQuery parses! next: run it.\n" as *u8); return 0 }
29    let off: i64 = jp_err_pos(ctx)   // src offset recorded at the FIRST error (reliable; jp_cur advances during recovery)
30    cw("PARSE FAIL: src_offset=" as *u8); cn(off); cw(" of " as *u8); cn(jn); cw("\n" as *u8)
31    var s: i64 = off - 14; if s < 0 { s = 0 }
32    var e: i64 = off + 34; if e > jn { e = jn }
33    cw("[EXACT ERROR TOKEN starts right after the " as *u8); cn(off - s); cw("-char prefix]\n" as *u8)
34    cw("--- context [" as *u8); cn(s); cw(".." as *u8); cn(e); cw("] ---\n" as *u8)
35    sys_write(1, ((jq as i64) + s) as *u8, e - s)
36    cw("\n--- (^ the construct near src_offset is the next parser gap) ---\n" as *u8)
37    return 0
38}
nx_jq_locate.nx source

`nx_jq_locate.nx` source
