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libtags: sync with upstream

binary files a/sys/src/cmd/audio/libtags/437.c b/sys/src/cmd/audio/libtags/437.c differ

--- a/sys/src/cmd/audio/libtags/8859.c

+++ b/sys/src/cmd/audio/libtags/8859.c

@@ -2,11 +2,15 @@

 #include "tagspriv.h"

 int

-iso88591toutf8(uchar *o, int osz, const uchar *s, int sz)

+iso88591toutf8(uchar *o0, int osz, const uchar *s, int sz)

 {

+	uchar *o;

 	int i;

+	o = o0;

 	for(i = 0; i < sz && osz > 1 && s[i] != 0; i++){

+		if(s[i] >= 0x7f && s[i] <= 0x9f) /* not expecting control chars */

+			goto asis;

 		if(s[i] >= 0xa0 && osz < 3)

 			break;

@@ -26,4 +30,12 @@

 	*o = 0;

 	return i;

+

+asis:

+	/* FIXME - copy within UTF-8 chars boundaries */

+	if(sz >= osz)

+		sz = osz-1;

+	memmove(o0, s, sz);

+	o0[sz] = 0;

+	return sz;

 }

--- a/sys/src/cmd/audio/libtags/flac.c

+++ b/sys/src/cmd/audio/libtags/flac.c

@@ -32,7 +32,8 @@

 		if(ctx->read(ctx, d, 4) != 4)

 			return -1;

-		sz = beu3(&d[1]);

+		if((sz = beu3(&d[1])) < 0)

+			return -1;

 		if((d[0] & 0x80) != 0)

 			last = 1;

@@ -40,12 +41,12 @@

 			int n, offset;

 			char *mime;

-			if(sz < 16 || ctx->read(ctx, d, 8) != 8) /* type, mime length */

+			if(sz < 8+4+20 || ctx->read(ctx, d, 8) != 8) /* type, mime length */

 				return -1;

 			sz -= 8;

 			n = beuint(&d[4]);

 			mime = ctx->buf+20;

-			if(n >= sz || n >= ctx->bufsz-20 || ctx->read(ctx, mime, n) != n)

+			if(n < 0 || n >= sz-4-20 || n >= ctx->bufsz-20 || ctx->read(ctx, mime, n) != n)

 				return -1;

 			sz -= n;

 			mime[n] = 0;

@@ -54,8 +55,10 @@

 			offset = beuint(d) + ctx->seek(ctx, 0, 1) + 20;

 			ctx->read(ctx, d, 20);

 			sz -= 20;

-			n = beuint(&d[16]);

-			tagscallcb(ctx, Timage, "", mime, offset, n, nil);

+			if((n = beuint(&d[16])) < 0)

+				return -1;

+			if(n > 0)

+				tagscallcb(ctx, Timage, "", mime, offset, n, nil);

 			if(ctx->seek(ctx, sz, 1) <= 0)

 				return -1;

 		}else if((d[0] & 0x7f) == 4){ /* 4 = vorbis comment */

@@ -80,11 +83,11 @@

 					return -1;

 				tagsz = leuint(d);

 				sz -= 4;

-				if(tagsz > sz)

+				if(tagsz < 0 || tagsz > sz)

 					return -1;

 				/* if it doesn't fit, ignore it */

-				if(tagsz+1 > ctx->bufsz){

+				if(tagsz == 0 || tagsz >= ctx->bufsz){

 					if(ctx->seek(ctx, tagsz, 1) < 0)

 						return -1;

 					continue;

--- a/sys/src/cmd/audio/libtags/id3v2.c

+++ b/sys/src/cmd/audio/libtags/id3v2.c

@@ -164,7 +164,8 @@

 	f = unsync ? unsyncread : nil;

 	if(strcmp((char*)d, "APIC") == 0){

 		offset = ctx->seek(ctx, 0, 1);

-		if((n = ctx->read(ctx, tag, 256)) == 256){ /* APIC mime and description should fit */

+		if((n = ctx->read(ctx, tag, 255)) == 255){ /* APIC mime and description should fit */

+			tag[255] = 0;

 			b = tag + 1; /* mime type */

 			for(n = 1 + strlen(b) + 2; n < 253; n++){

 				if(tag[0] == 0 || tag[0] == 3){ /* one zero byte */

@@ -195,7 +196,8 @@

 					break;

 				}

 			}

-			tagscallcb(ctx, Timage, "PIC", strcmp(b, "JPG") == 0 ? "image/jpeg" : "image/png", offset+n, tsz-n, f);

+			if(tsz > n)

+				tagscallcb(ctx, Timage, "PIC", strcmp(b, "JPG") == 0 ? "image/jpeg" : "image/png", offset+n, tsz-n, f);

 			n = 256;

 		}

 	}else if(strcmp((char*)d, "RVA2") == 0 && tsz >= 6+5){

@@ -212,7 +214,9 @@

 {

 	char *b, *tag;

-	if(ctx->bufsz >= tsz+1){

+	if(tsz < 0)

+		return -1;

+	if(ctx->bufsz > tsz){

 		/* place the data at the end to make best effort at charset conversion */

 		tag = &ctx->buf[ctx->bufsz - tsz - 1];

 		if(ctx->read(ctx, tag, tsz) != tsz)

@@ -304,7 +308,7 @@

 	uint x;

 	int xversion, xlayer, xbitrate, i;

-	if(ctx->read(ctx, ctx->buf, 256) != 256)

+	if(ctx->duration != 0 || ctx->read(ctx, ctx->buf, 256) != 256)

 		return;

 	x = beuint((uchar*)ctx->buf);

@@ -372,8 +376,8 @@

 {

 	int sz, exsz, framesz;

 	int ver, unsync, offset;

-	int oldpos, newpos;

-	uchar d[10], *b;

+	int newpos, oldpos;

+	uchar d[10], *b, *e;

 	if(ctx->read(ctx, d, sizeof(d)) != sizeof(d))

 		return -1;

@@ -403,7 +407,7 @@

 			if(ctx->read(ctx, d, 4) != 4)

 				return -1;

 			exsz = (ver >= 3) ? beuint(d) : synchsafe(d);

-			if(ctx->seek(ctx, exsz, 1) < 0)

+			if(exsz < 6 || ctx->seek(ctx, exsz-4, 1) < 0)

 				return -1;

 			sz -= exsz;

 		}

@@ -454,6 +458,7 @@

 	offset = ctx->seek(ctx, sz, 1);

 	sz = ctx->bufsz <= 2048 ? ctx->bufsz : 2048;

+	e = (uchar*)ctx->buf + sz - 3;

 	b = nil;

 	for(exsz = 0; exsz < 2048; exsz += sz){

 		if(ctx->read(ctx, ctx->buf, sz) != sz)

@@ -462,12 +467,12 @@

 			newpos = ctx->seek(ctx, (char*)b - ctx->buf + offset + exsz, 0);

 			if(ctx->read(ctx, d, sizeof(d)) != sizeof(d))

 				return 0;

-			if(isid3(d) && newpos != oldpos){

+			if(isid3(d) && newpos > oldpos){

 				oldpos = newpos;

 				goto header;

 			}

 		}

-		for(b = (uchar*)ctx->buf; (b = memchr(b, 0xff, sz-3)) != nil; b++){

+		for(b = (uchar*)ctx->buf; b < e && (b = memchr(b, 0xff, e-b)) != nil; b++){

 			if((b[1] & 0xe0) == 0xe0){

 				offset = ctx->seek(ctx, (char*)b - ctx->buf + offset + exsz, 0);

 				exsz = 2048;

--- a/sys/src/cmd/audio/libtags/m4a.c

+++ b/sys/src/cmd/audio/libtags/m4a.c

@@ -124,7 +124,7 @@

 		if(type < 0)

 			continue;

-		if(ctx->seek(ctx, 8, 1) < 0) /* skip size and "data" */

+		if(sz < 16 || ctx->seek(ctx, 8, 1) < 0) /* skip size and "data" */

 			return -1;

 		sz -= 8;

 		if(ctx->read(ctx, d, 8) != 8) /* read data type and 4 bytes of whatever else */

@@ -148,7 +148,7 @@

 		}else if(dtype == 1){ /* text */

 			if(sz >= ctx->bufsz) /* skip tags that can't fit into memory. ">=" because of '\0' */

 				continue;

-			if(ctx->read(ctx, d, sz) != sz)

+			if(sz < 0 || ctx->read(ctx, d, sz) != sz)

 				return -1;

 			d[sz] = 0;

 			txtcb(ctx, type, "", d);

--- a/sys/src/cmd/audio/libtags/mod.c

+++ b/sys/src/cmd/audio/libtags/mod.c

@@ -16,6 +16,9 @@

 	"CD81",

 	"OCTA",

 	"OKTA",

+	"4CHN",

+	"6CHN",

+	"8CHN",

 	"10CH",

 	"16CN",

 	"32CN",

@@ -42,7 +45,7 @@

 		return -1;

 	if(ctx->read(ctx, d, 20) != 20)

 		return -1;

-	if(iso88591toutf8(o, sizeof(o), d, 20) > 0)

+	if(cp437toutf8(o, sizeof(o), d, 20) > 0)

 		txtcb(ctx, Ttitle, "", o);

 	return 0;

--- a/sys/src/cmd/audio/libtags/opus.c

+++ b/sys/src/cmd/audio/libtags/opus.c

@@ -17,7 +17,7 @@

 		/* calculate the size of the packet */

 		nsegs = d[26];

-		if(ctx->read(ctx, d, nsegs+8) != nsegs+8)

+		if(nsegs > ctx->bufsz-8 || ctx->read(ctx, d, nsegs+8) != nsegs+8)

 			return -1;

 		for(sz = i = 0; i < nsegs; sz += d[i++]);

--- a/sys/src/cmd/audio/libtags/s3m.c

+++ b/sys/src/cmd/audio/libtags/s3m.c

@@ -3,7 +3,7 @@

 int

 tags3m(Tagctx *ctx)

 {

-	char d[28+1+1], o[28*UTFmax+1], *s;

+	uchar d[28+1+1], o[28*UTFmax+1], *s;

 	if(ctx->read(ctx, d, 28+1+1) != 28+1+1 || (d[28] != 0x1a && d[28] != 0) || d[29] != 0x10)

 		return -1;

--- a/sys/src/cmd/audio/libtags/tags.c

+++ b/sys/src/cmd/audio/libtags/tags.c

@@ -8,23 +8,11 @@

 	int format;

 };

-extern int tagflac(Tagctx *ctx);

-extern int tagid3v1(Tagctx *ctx);

-extern int tagid3v2(Tagctx *ctx);

-extern int tagit(Tagctx *ctx);

-extern int tagm4a(Tagctx *ctx);

-extern int tagopus(Tagctx *ctx);

-extern int tags3m(Tagctx *ctx);

-extern int tagvorbis(Tagctx *ctx);

-extern int tagwav(Tagctx *ctx);

-extern int tagxm(Tagctx *ctx);

-extern int tagmod(Tagctx *ctx);

-

 static const Getter g[] =

 {

 	{tagid3v2, Fmp3},

 	{tagid3v1, Fmp3},

-	{tagvorbis, Fogg},

+	{tagvorbis, Fvorbis},

 	{tagflac, Fflac},

 	{tagm4a, Fm4a},

 	{tagopus, Fopus},

--- a/sys/src/cmd/audio/libtags/tags.h

+++ b/sys/src/cmd/audio/libtags/tags.h

@@ -12,9 +12,9 @@

 	Ttitle,

 	Tdate, /* "2014", "2015/02/01", but the year goes first */

 	Ttrack, /* "1", "01", "1/4", but the track number goes first */

-	Talbumgain,

+	Talbumgain, /* see GAIN note */

 	Talbumpeak,

-	Ttrackgain,

+	Ttrackgain, /* see GAIN note */

 	Ttrackpeak,

 	Tgenre,

 	Timage,

@@ -22,12 +22,22 @@

 	Tcomment,

 };

+/* GAIN note:

+ *

+ * Even though the gain value may be expected to look as "52 dB", it

+ * very well may be a plain integer (such as "12032") for R128_* tags.

+ * To do things correctly you will have to check 'const char *k' argument

+ * passed into your callback and parse it accordingly.

+ *

+ * FIXME the output gain (opus) is not parsed, btw.

+ */

+

 /* Format of the audio file. */

 enum

 {

 	Funknown = -1,

 	Fmp3,

-	Fogg,

+	Fvorbis,

 	Fflac,

 	Fm4a,

 	Fopus,

@@ -78,7 +88,7 @@

 	int samplerate; /* Hz */

 	int bitrate; /* Bitrate, bits/s. */

 	int duration; /* ms */

-	int format; /* Fmp3, Fogg, Fflac, Fm4a */

+	int format; /* Fmp3, Fvorbis, Fflac, Fm4a */

 	/* Private, don't touch. */

 	int found;

--- a/sys/src/cmd/audio/libtags/tagspriv.h

+++ b/sys/src/cmd/audio/libtags/tagspriv.h

@@ -30,7 +30,7 @@

 /*

  * Same as utf16to8, but CP437 to UTF-8.

  */

-int cp437toutf8(char *o, int osz, const char *s, int sz);

+int cp437toutf8(uchar *o, int osz, const uchar *s, int sz);

 /*

  * This one is common for both vorbis.c and flac.c

@@ -42,3 +42,15 @@

 void tagscallcb(Tagctx *ctx, int type, const char *k, char *s, int offset, int size, Tagread f);

 #define txtcb(ctx, type, k, s) tagscallcb(ctx, type, k, (char*)s, 0, 0, nil)

+

+int tagflac(Tagctx *ctx);

+int tagid3v1(Tagctx *ctx);

+int tagid3v2(Tagctx *ctx);

+int tagit(Tagctx *ctx);

+int tagm4a(Tagctx *ctx);

+int tagopus(Tagctx *ctx);

+int tags3m(Tagctx *ctx);

+int tagvorbis(Tagctx *ctx);

+int tagwav(Tagctx *ctx);

+int tagxm(Tagctx *ctx);

+int tagmod(Tagctx *ctx);

--- a/sys/src/cmd/audio/libtags/wav.c

+++ b/sys/src/cmd/audio/libtags/wav.c

@@ -20,9 +20,7 @@

 tagwav(Tagctx *ctx)

 {

 	uchar *d;

-	int i, n, info;

-	u32int csz, x;

-	uvlong sz;

+	int i, n, info, csz, x, sz;

 	d = (uchar*)ctx->buf;

@@ -49,7 +47,7 @@

 			break;

 		sz -= 4+4;

 		csz = leuint(d+4);

-		if(sz < csz)

+		if(sz < csz || csz < 0)

 			break;

 		sz -= csz;

@@ -66,12 +64,14 @@

 				return -1;

 			ctx->duration = sz*1000 / x;

 		}else if(memcmp(d, "LIST", 4) == 0){

+			if(csz < 4)

+				return -1;

 			sz = csz - 4;

 			continue;

-		}else if(info && csz < (u32int)ctx->bufsz){

+		}else if(info && csz < ctx->bufsz-5){

 			for(n = 0; n < nelem(t); n++){

 				if(memcmp(d, t[n].s, 4) == 0 || t[n].type == Tunknown){

-					if(ctx->read(ctx, d+5, csz) != (int)csz)

+					if(ctx->read(ctx, d+5, csz) != csz)

 						return -1;

 					d[4] = 0;

 					d[5+csz] = 0;

@@ -87,6 +87,10 @@

 		if(ctx->seek(ctx, csz, 1) < 0)

 			return -1;

 	}

+

+	/* some software may append an id3v2 tag */

+	if(i > 0 && ctx->read(ctx, d, 8) == 8 && memcmp(d, "id3 ", 4) == 0)

+		tagid3v2(ctx);

 	return i > 0 ? 0 : -1;

 }

--- a/sys/src/cmd/audio/libtags/xm.c

+++ b/sys/src/cmd/audio/libtags/xm.c

@@ -3,9 +3,9 @@

 int

 tagxm(Tagctx *ctx)

 {

-	char d[17+20+1], o[20*UTFmax+1];

+	uchar d[17+20+1], o[20*UTFmax+1];

-	if(ctx->read(ctx, d, 17+20) != 17+20 || cistrncmp(d, "Extended Module: ", 17) != 0)

+	if(ctx->read(ctx, d, 17+20) != 17+20 || cistrncmp((char*)d, "Extended Module: ", 17) != 0)

 		return -1;

 	d[17+20] = 0;

 	if(cp437toutf8(o, sizeof(o), d+17, 20) > 0)

--- a/sys/src/cmd/audio/zuke/mkplist.c

+++ b/sys/src/cmd/audio/zuke/mkplist.c

@@ -34,7 +34,7 @@

 static char *fmts[] =

 {

 	[Fmp3] = "mp3",

-	[Fogg] = "ogg",

+	[Fvorbis] = "ogg",

 	[Fflac] = "flac",

 	[Fm4a] = "m4a",

 	[Fopus] = "opus",