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| author | Russ Cox <rsc@swtch.com> | 2020-05-29 21:19:32 -0400 |
|---|---|---|
| committer | Russ Cox <rsc@swtch.com> | 2020-05-29 21:28:59 -0400 |
| commit | 3850e6e177677885074c8896ef24534894726ad5 (patch) | |
| tree | 9978899545aad1214513d7801d938f4925c6128c /src/cmd/devdraw | |
| parent | 2c70acc3ab751ab1ccb1999f1d22310ad8c35b27 (diff) | |
| download | plan9port-3850e6e177677885074c8896ef24534894726ad5.tar.gz plan9port-3850e6e177677885074c8896ef24534894726ad5.tar.bz2 plan9port-3850e6e177677885074c8896ef24534894726ad5.zip | |
devdraw: accept 5- and 6-byte Unicode hex values
Alt X 1234 for U+1234
Alt X X 12345 for U+12345
Alt X X X 103456 for U+103456.
Diffstat (limited to 'src/cmd/devdraw')
| -rw-r--r-- | src/cmd/devdraw/latin1.c | 39 |
1 files changed, 31 insertions, 8 deletions
diff --git a/src/cmd/devdraw/latin1.c b/src/cmd/devdraw/latin1.c index a3d13a08..87c0be45 100644 --- a/src/cmd/devdraw/latin1.c +++ b/src/cmd/devdraw/latin1.c @@ -17,16 +17,15 @@ static struct cvlist }; /* - * Given 5 characters k[0]..k[4], find the rune or return -1 for failure. + * Given 5 characters k[0]..k[n], find the rune or return -1 for failure. */ static long -unicode(Rune *k) +unicode(Rune *k, int n) { long i, c; - k++; /* skip 'X' */ c = 0; - for(i=0; i<4; i++,k++){ + for(i=0; i<n; i++,k++){ c <<= 4; if('0'<=*k && *k<='9') c += *k-'0'; @@ -36,6 +35,8 @@ unicode(Rune *k) c += 10 + *k-'A'; else return -1; + if(c > Runemax) + return -1; } return c; } @@ -53,10 +54,32 @@ latin1(Rune *k, int n) char* p; if(k[0] == 'X'){ - if(n>=5) - return unicode(k); - else - return -5; + if(n < 2) + return -2; + if(k[1] == 'X') { + if(n < 3) + return -3; + if(k[2] == 'X') { + if(n < 9) { + if(unicode(k+3, n-3) < 0) + return -1; + return -(n+1); + } + return unicode(k+3, 6); + } + if(n < 7) { + if(unicode(k+2, n-2) < 0) + return -1; + return -(n+1); + } + return unicode(k+2, 5); + } + if(n < 5) { + if(unicode(k+1, n-1) < 0) + return -1; + return -(n+1); + } + return unicode(k+1, 4); } for(l=latintab; l->ld!=0; l++) |