dadada/netcalc
dadada/netcalc
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Merge remote-tracking branch 'origin/master'

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Chamaeleon 2018-10-29 11:08:06 +01:00
commit 9be777068f
1 changed files with 21 additions and 0 deletions
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netcalc.c
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@ -136,6 +136,13 @@ int base(char *numstr, unsigned int *num) {
} }
} }
/// Parses the client input into a command
/// @param buf source buffer
/// @param buflen length of source buffer
/// @param first first operand
/// @param second second operand
/// @param op operator (+,-,*,/)
/// @return 0 on success -1 on parser error, -2 on invalid values
int parse(char *buf, size_t buflen, unsigned int *first, unsigned int *second, char *op) { int parse(char *buf, size_t buflen, unsigned int *first, unsigned int *second, char *op) {
char *num1str = NULL; char *num1str = NULL;
char *num2str = NULL; char *num2str = NULL;
@ -165,12 +172,19 @@ int parse(char *buf, size_t buflen, unsigned int *first, unsigned int *second, c
return status; return status;
} }
/// Prints a formatted error to stderr and a buffer
/// @param buf destination buffer
/// @param buflen length of buf
/// @param msg error message
void report_error(char *buf, unsigned long buflen, char *msg) { void report_error(char *buf, unsigned long buflen, char *msg) {
fprintf(stderr, "%s\n", msg); fprintf(stderr, "%s\n", msg);
memset(buf, 0, buflen); memset(buf, 0, buflen);
sprintf(buf, "%s\n", msg); sprintf(buf, "%s\n", msg);
} }
/// Converts an integer into a string representation of its binary encoding
/// @param n an integer
/// @param out stores the resulting string
void bstr(unsigned int n, char **out) { void bstr(unsigned int n, char **out) {
// voodoo // voodoo
int msb = 32 - __builtin_clz(n); int msb = 32 - __builtin_clz(n);
@ -182,6 +196,8 @@ void bstr(unsigned int n, char **out) {
} }
} }
/// Starts a server that listens for commands and performs calculations
/// @return 0 on success <0 on failure
int server() { int server() {
struct sockaddr_storage c_addr; struct sockaddr_storage c_addr;
socklen_t sin_size = sizeof c_addr; socklen_t sin_size = sizeof c_addr;
@ -226,8 +242,11 @@ int server() {
} }
close(c_fd); close(c_fd);
} }
return 0;
} }
/// Connects the client to the server
/// @return 0 on success <0 on failure
int connectclient(struct addrinfo *ainfo) { int connectclient(struct addrinfo *ainfo) {
if (connect(SOCKFD, ainfo->ai_addr, ainfo->ai_addrlen) == -1) { if (connect(SOCKFD, ainfo->ai_addr, ainfo->ai_addrlen) == -1) {
perror("connect"); perror("connect");
@ -236,6 +255,8 @@ int connectclient(struct addrinfo *ainfo) {
return 0; return 0;
} }
/// Starts a client
/// @return 0 on success -1 on failure
int client() { int client() {
char buf[BUFLEN]; char buf[BUFLEN];
size_t nullsize = 0; size_t nullsize = 0;