use appropriate integer types

Mainly found with clang -Wconversion -Wshorten-64-to-32.

mgenmid.c

@@ -103,7 +103,7 @@ fallback:
 		rnd = ((uint64_t)lrand48() << 32) + lrand48();
 	}
 
-	rnd |= (1LL << 63);  // set highest bit to force full width
+	rnd |= (1ULL << 63);  // set highest bit to force full width
 
 	putchar('<');
 	printb36(((uint64_t)tp.tv_sec * 1000000LL + tp.tv_usec));

mlist.c

@@ -109,7 +109,8 @@ struct linux_dirent64 {
 void
 listdir(char *dir)
 {
-	int fd, nread;
+	int fd;
+	ssize_t nread;
 	char buf[BUF_SIZE];
 	struct linux_dirent64 *d;
 	int bpos;

mmime.c

@@ -57,7 +57,8 @@ int gen_b64(uint8_t *s, off_t size)
 	return 0;
 }
 
-int gen_qp(uint8_t *s, off_t size, int maxlinelen, int linelen)
+size_t
+gen_qp(uint8_t *s, off_t size, size_t maxlinelen, size_t linelen)
 {
 	off_t i;
 	int header = linelen > 0;
@@ -298,7 +299,7 @@ print_header(char *line) {
 
 	int prevq = 0;  // was the previous word encoded as qp?
 
-	int linelen = s - line;
+	size_t linelen = s - line;
 
 	while (*s) {
 		size_t highbit = 0;
@@ -365,7 +366,7 @@ gen_build()
 	int intext = 0;
 
 	while (1) {
-		int read = getdelim(&line, &linelen, '\n', stdin);
+		ssize_t read = getdelim(&line, &linelen, '\n', stdin);
 		if (read == -1) {
 			if (feof(stdin))
 				break;

mscan.c

@@ -33,7 +33,7 @@ static time_t now;
 static char default_fflag[] = "%c%u%r %-3n %10d %17f %t %2i%s";
 static char *fflag = default_fflag;
 
-int
+ssize_t
 u8putstr(FILE *out, char *s, ssize_t l, int pad)
 {
 	ssize_t ol = l;
@@ -109,7 +109,7 @@ numline(char *file)
 }
 
 static char *
-fmt_date(struct message *msg, int w, int iso)
+fmt_date(struct message *msg, long w, int iso)
 {
 	static char date[32];
 	char *v;
@@ -244,7 +244,7 @@ fmt_to_flag(struct message *msg)
 }
 
 static ssize_t
-print_human(intmax_t i, int w)
+print_human(intmax_t i, long w)
 {
 	double d = i / 1024.0;
 	const char *u = "\0\0M\0G\0T\0P\0E\0Z\0Y\0";
@@ -310,7 +310,7 @@ oneline(char *file)
 		}
 		f++;
 
-		int w = 0;
+		long w = 0;
 		if ((*f >= '0' && *f <= '9') || *f == '-') {
 			errno = 0;
 			char *e;

mshow.c

@@ -45,7 +45,7 @@ printable(int c)
 	return (unsigned)c-0x20 < 0x5f;
 }
 
-int
+size_t
 print_ascii(char *body, size_t bodylen)
 {
 	if (safe_output) {
@@ -567,7 +567,7 @@ print_date_header(char *v)
 		printf(" (");
 		time_t d = t < now ? now - t : t - now;
 
-		int l;
+		char l;
 		if (d > 60*60*24*7*52) l = 'y';
 		else if (d > 60*60*24*7) l = 'w';
 		else if (d > 60*60*24) l = 'd';
@@ -576,7 +576,7 @@ print_date_header(char *v)
 		else l = 's';
 		int p = 3;
 
-		int z;
+		long z;
 		switch (l) {
 		case 'y':
 			z = d / (60*60*24*7*52);

pipeto.c

@@ -57,14 +57,14 @@ pipeto(const char *cmdline)
 			errno = EINVAL;
 
 		// execvp failed, write errno to parent
-		long e = errno;
+		int e = errno;
 		if (write(pipe1[1], &e, sizeof e) < 0)
 			exit(111);  // do a magic dance for gcc -Wunused-result
 		exit(111);
 	} else {  // in parent
 		close(pipe1[1]);
 
-		long e;
+		int e;
 		ssize_t n = read(pipe1[0], &e, sizeof e);
 		if (n < 0)
 			e = errno;

rfc2045.c

@@ -129,7 +129,7 @@ blaze822_multipart(struct message *msg, struct message **imsg)
 	if (!blaze822_mime_parameter(s, "boundary", &boundary, &boundaryend))
 		return 0;
 	char mboundary[256];
-	int boundarylen = boundaryend-boundary+2;
+	size_t boundarylen = boundaryend-boundary+2;
 
 	if (boundarylen >= 256)
 		return 0;

rfc2047.c

@@ -215,7 +215,7 @@ blaze822_decode_rfc2047(char *dst, char *src, size_t dlen, char *tgtenc)
 		}
 
 		decchunk = dec;
-		int r = iconv(ic, &dec, &declen, &dst, &dlen);
+		ssize_t r = iconv(ic, &dec, &declen, &dst, &dlen);
 		if (r < 0) {
 			if (errno == E2BIG) {
 				break;

rfc2231.c

@@ -111,8 +111,8 @@ found_plain:
 	size_t dstlen = dst - dststart;
 	dst = dststart;
 
-	int r = iconv(ic, &dst, &dstlen, &tmpend, &tmplen);
-	if (r < 0) {
+	size_t r = iconv(ic, &dst, &dstlen, &tmpend, &tmplen);
+	if (r == (size_t)-1) {
 		free(tmp);
 		return 1;
 	}

seq.c

@@ -142,7 +142,7 @@ blaze822_seq_cur(void)
 	if (!curlink)
 		curlink = blaze822_home_file("cur");
 
-	int r = readlink(curlink, b, sizeof b - 1);
+	ssize_t r = readlink(curlink, b, sizeof b - 1);
 	if (r < 0)
 		return 0;
 	b[r] = 0;
@@ -308,14 +308,14 @@ parse_parent(char *map, long *starto, long *stopo)
 	char *s, *t;
 	long line;
 
-	int previndent[256] = { 0 };
+	long previndent[256] = { 0 };
 
 	for (s = map, line = 0; s; s = t+1) {
 		t = strchr(s, '\n');
 		if (!t)
 			break;
 		line++;
-		int indent = 0;
+		long indent = 0;
 		while (*s && iswsp(*s)) {
 			s++;
 			indent++;