`nx_md.nx` source

1// nx_md.nx -- sovereign Markdown -> HTML viewer CLI. The renderer itself lives in nx_md_lib.nx (rule 15
2// DRY: shared with the NishiOS app layer, which LINKS renderers instead of exec'ing them). Same
3// `html <in> <out> [dlurl]` interface as nx_docx/nx_csv/nx_pdf, so the nx_doc_view dispatcher routes to it
4// by registry with zero special-casing. license_tier: ORIGINAL
5import "nx_syscalls.nx"
6import "nx_itoa_lib.nx"   // shared MSB-first emitter (zero-alloc)
7import "nx_md_lib.nx"
8const K_MAGIC_2097168: i64 = 2097168
9const K_MAGIC_2097152: i64 = 2097152
10const K_MAGIC_8388608: i64 = 8388608
11
12func md_slen(s: *u8) -> i64 { var n: i64=0; while s[n]!=(0 as u8) { n=n+1 } return n }
13func md_puts(s: *u8) -> i64 { sys_write(1, s, md_slen(s)); return 0 }
14// MIGRATED to the shared emitter (debt 1785563586). The old body mmapped a scratch buffer
15// per call and never freed it. At PAGE granularity that is 4096B leaked PER CALL -- the
16// defect that took 28.5GB of a 36GB host in nx_ts_lumadiff (2MB input, ~3.66M calls).
17// nxi_* is MSB-first, allocates NOTHING, and emits identical bytes including the sign.
18func md_num(v: i64) -> i64 { nxi_out(v); return 0 }
19
20func md_readfile(path: *u8, buf: *u8, cap: i64) -> i64 {
21    let fd: i64=sys_openat_rd(path); if fd<0 { return 0-1 }
22    var tot: i64=0; while tot<cap { let r: i64=sys_read(fd,(buf as i64+tot) as *u8,cap-tot); if r<=0 { break } tot=tot+r }
23    sys_close(fd); return tot
24}
25
26func main(argc: i64, argv: *i64) -> i64 {
27    if argc<4 { md_puts("usage: nx_md html <in.md> <out.html> [download_url]\n" as *u8); sys_exit(2); return 2 }
28    let cmd: *u8=argv[1] as *u8
29    if cmd[0]!=(104 as u8) { md_puts("nx_md: unknown command (html)\n" as *u8); sys_exit(2); return 2 }
30    let inp: *u8=argv[2] as *u8
31    let outp: *u8=argv[3] as *u8
32    var dlu: *u8=0 as *u8
33    if argc>4 { dlu=argv[4] as *u8 }
34    let src: *u8=sys_mmap(K_MAGIC_2097168)
35    let slen: i64=md_readfile(inp, src, K_MAGIC_2097152)
36    if slen<0 { md_puts("MD-HTML-FAIL cannot-read\n" as *u8); sys_exit(1); return 1 }
37    let out: *u8=sys_mmap(K_MAGIC_8388608)
38    let n: i64=md_to_html(src, slen, out, dlu)
39    let fd: i64=sys_openat_wr(outp, 0x1a4)
40    if fd<0 { md_puts("MD-HTML-FAIL cannot-write\n" as *u8); sys_exit(1); return 1 }
41    sys_write(fd, out, n); sys_close(fd)
42    md_puts("MD-HTML-OK path=" as *u8); md_puts(outp); md_puts(" bytes=" as *u8); md_num(n); md_puts("\n" as *u8)
43    sys_exit(0); return 0
44}
nx_md.nx source

`nx_md.nx` source
