ref: c881e33e8ed668f4d5a2102c113e3edb1ea80d44
dir: /sys/man/1/mpc/
.TH MPC 1 .SH NAME mpc \- extended precision arithmetic code generator .SH SYNOPSIS .B mpc [ .I file ... ] .SH DESCRIPTION .I Mpc generates C functions from a simple language that operates on extended precision integers using the .IR mp (2) library. .SH LANGUAGE The language consists of a series of function definitions of the form: .IP .I name ( .I "parameter list" ) { .I statements } .PP All variables and parameters are extended precision integers and are passed by reference. Statements are separated by semicolon and the following statemens are defined: .IP .I name .B = .I expression .IP .B if ( .I condition ) { .I statements } .B "else if" ( .I condition ) { .I statements } .B else { .I statements } .IP .B while ( .I condition ) { .I statements } .IP .B break .IP .I name ( .I "parameter list" ) .IP .B mod ( .I modulus ) { .I statements } .PP There is no distinction between input and output parameters, but conventionally, the outputs are put at the end of the .I "parameter list" and the language allows one to write .IP .I F ( .IR X , .IR Y , .I Z ) as .IR Y , .I Z .B = .I F ( .I X ) .PP Expressions are composed out of the following arithmetic operations: .RS .TF _____________ .TP .B + addition. .TP .B - subtraction. .TP .B * multiplication. .TP .B / division, or multiplicative inverse when enclosed in .B mod block. .TP .B % division remainder. .TP .B ^ exponentiation. .TP .BI >> constant right shift by a constant. .TP .BI << constant left shift by a constant. .TP .IB condition ? a : b pick .I a when .I condition is true, otherwise .I b when false. .RE .PD .PP Conditions can use the following operations: .RS .TF _____________ .TP .B == equality. .TP .B != inequality. .TP .B > bigger than. .TP .B < smaller than. .TP .BI ! condition negation. .RE .SH SOURCE .B /sys/src/cmd/mpc.y .SH "SEE ALSO" .IR mp (2)