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Make terminal ui binaries work well everywhere

Browse Source 
Here's some screenshots of an emulator tui program that was compiled on
Linux, then scp'd it to Windows, Mac, and FreeBSD.

https://justine.storage.googleapis.com/blinkenlights-cmdexe.png
https://justine.storage.googleapis.com/blinkenlights-imac.png
https://justine.storage.googleapis.com/blinkenlights-freebsd.png
https://justine.storage.googleapis.com/blinkenlights-lisp.png

How is this even possible that we have a nontrivial ui binary that just
works on Mac, Windows, Linux, and BSD? Surely a first ever achievement.

Fixed many bugs. Bootstrapped John McCarthy's metacircular evaluator on
bare metal in half the size of Altair BASIC (about 2.5kb) and ran it in
emulator for fun and profit.
This commit is contained in:
Justine Tunney
2020-10-10 21:18:53 -07:00
parent 680daf1210
commit 9e3e985ae5
276 changed files with 7026 additions and 3790 deletions
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33
libc/runtime/getdosargv.c
View File

@@ -25,6 +25,7 @@
#include "libc/str/appendchar.h"
#include "libc/str/str.h"
#include "libc/str/tpenc.h"
#include "libc/str/utf16.h"
/* TODO(jart): Make early-stage data structures happen. */
#undef isspace
@@ -39,11 +40,7 @@ struct DosArgv {
wint_t wc;
};
static textwindows void decodedosargv(struct DosArgv *st) {
st->s += getutf16(st->s, &st->wc);
}
static textwindows void appenddosargv(struct DosArgv *st, wint_t wc) {
static textwindows void AppendDosArgv(struct DosArgv *st, wint_t wc) {
AppendChar(&st->p, st->pe, wc);
}
@@ -66,7 +63,7 @@ static textwindows void appenddosargv(struct DosArgv *st, wint_t wc) {
* @see libc/runtime/ntspawn.c
* @note kudos to Simon Tatham for figuring out quoting behavior
*/
textwindows int getdosargv(const char16_t *cmdline, char *buf, size_t size,
textwindows int GetDosArgv(const char16_t *cmdline, char *buf, size_t size,
char **argv, size_t max) {
bool inquote;
size_t i, argc, slashes, quotes;
@@ -75,9 +72,9 @@ textwindows int getdosargv(const char16_t *cmdline, char *buf, size_t size,
st.p = buf;
st.pe = buf + size;
argc = 0;
decodedosargv(&st);
st.wc = DecodeNtsUtf16(&st.s);
while (st.wc) {
while (st.wc && iswspace(st.wc)) decodedosargv(&st);
while (st.wc && iswspace(st.wc)) st.wc = DecodeNtsUtf16(&st.s);
if (!st.wc) break;
if (++argc < max) {
argv[argc - 1] = st.p < st.pe ? st.p : NULL;
@@ -88,27 +85,27 @@ textwindows int getdosargv(const char16_t *cmdline, char *buf, size_t size,
if (st.wc == '"' || st.wc == '\\') {
slashes = 0;
quotes = 0;
while (st.wc == '\\') decodedosargv(&st), slashes++;
while (st.wc == '"') decodedosargv(&st), quotes++;
while (st.wc == '\\') st.wc = DecodeNtsUtf16(&st.s), slashes++;
while (st.wc == '"') st.wc = DecodeNtsUtf16(&st.s), quotes++;
if (!quotes) {
while (slashes--) appenddosargv(&st, '\\');
while (slashes--) AppendDosArgv(&st, '\\');
} else {
while (slashes >= 2) appenddosargv(&st, '\\'), slashes -= 2;
if (slashes) appenddosargv(&st, '"'), quotes--;
while (slashes >= 2) AppendDosArgv(&st, '\\'), slashes -= 2;
if (slashes) AppendDosArgv(&st, '"'), quotes--;
if (quotes > 0) {
if (!inquote) quotes--;
for (i = 3; i <= quotes + 1; i += 3) appenddosargv(&st, '"');
for (i = 3; i <= quotes + 1; i += 3) AppendDosArgv(&st, '"');
inquote = (quotes % 3 == 0);
}
}
} else {
appenddosargv(&st, st.wc);
decodedosargv(&st);
AppendDosArgv(&st, st.wc);
st.wc = DecodeNtsUtf16(&st.s);
}
}
appenddosargv(&st, '\0');
AppendDosArgv(&st, '\0');
}
appenddosargv(&st, '\0');
AppendDosArgv(&st, '\0');
if (size) buf[min(st.p - buf, size - 1)] = '\0';
if (max) argv[min(argc, max - 1)] = NULL;
return argc;