add safemult man pages

CHANGES

@@ -2,7 +2,7 @@
   add io_socketpair
   add io_passfd and io_receivefd (and test/fdpassing.c)
   io_trywrite and io_waitwrite not ignore SIGPIPE
-  add man pages for libio
+  add man pages for libio, safemult
 
 0.18:
   make libowfat compile on BSD again (sorry, and thanks to everyone who

mult/imult16.3

@@ -0,0 +1,14 @@
+.TH imult16 3
+.SH NAME
+imult16 \- integer multiplication with overflow checking
+.SH SYNTAX
+.B #include <safemult.h>
+
+int \fBimult16\fP(int16 a,int16 b,int16* c);
+.SH DESCRIPTION
+imult16 does c=a*b and returns 1.
+
+In case of an integer overflow, imult16 leaves \fIc\fR alone and returns
+0.
+.SH "SEE ALSO"
+umult16(3), imult32(3), imult64(3)

mult/imult32.3

@@ -0,0 +1,14 @@
+.TH imult32 3
+.SH NAME
+imult32 \- integer multiplication with overflow checking
+.SH SYNTAX
+.B #include <safemult.h>
+
+int \fBimult32\fP(int32 a,int32 b,int32* c);
+.SH DESCRIPTION
+imult32 does c=a*b and returns 1.
+
+In case of an integer overflow, imult32 leaves \fIc\fR alone and returns
+0.
+.SH "SEE ALSO"
+imult16(3), umult32(3), imult64(3)

mult/imult64.3

@@ -0,0 +1,14 @@
+.TH imult64 3
+.SH NAME
+imult64 \- integer multiplication with overflow checking
+.SH SYNTAX
+.B #include <safemult.h>
+
+int \fBimult64\fP(int64 a,int64 b,int64* c);
+.SH DESCRIPTION
+imult64 does c=a*b and returns 1.
+
+In case of an integer overflow, imult64 leaves \fIc\fR alone and returns
+0.
+.SH "SEE ALSO"
+imult16(3), imult32(3), umult64(3)

mult/umult16.3

@@ -0,0 +1,14 @@
+.TH umult16 3
+.SH NAME
+umult16 \- integer multiplication with overflow checking
+.SH SYNTAX
+.B #include <safemult.h>
+
+int \fBumult16\fP(uint16 a,uint16 b,uint16* c);
+.SH DESCRIPTION
+umult16 does c=a*b and returns 1.
+
+In case of an integer overflow, umult16 leaves \fIc\fR alone and returns
+0.
+.SH "SEE ALSO"
+imult16(3), imult32(3), imult64(3)

mult/umult32.3

@@ -0,0 +1,14 @@
+.TH umult32 3
+.SH NAME
+umult32 \- integer multiplication with overflow checking
+.SH SYNTAX
+.B #include <safemult.h>
+
+int \fBumult32\fP(uint32 a,uint32 b,uint32* c);
+.SH DESCRIPTION
+umult32 does c=a*b and returns 1.
+
+In case of an integer overflow, umult32 leaves \fIc\fR alone and returns
+0.
+.SH "SEE ALSO"
+umult16(3), imult32(3), umult64(3)

mult/umult64.3

@@ -0,0 +1,14 @@
+.TH umult64 3
+.SH NAME
+umult64 \- integer multiplication with overflow checking
+.SH SYNTAX
+.B #include <safemult.h>
+
+int \fBumult64\fP(uint64 a,uint64 b,uint64* c);
+.SH DESCRIPTION
+umult64 does c=a*b and returns 1.
+
+In case of an integer overflow, umult64 leaves \fIc\fR alone and returns
+0.
+.SH "SEE ALSO"
+imult16(3), imult32(3), imult64(3)