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| author | Silvino Silva <silvino@bk.ru> | 2018-03-12 14:34:16 +0000 |
|---|---|---|
| committer | Silvino Silva <silvino@bk.ru> | 2018-03-12 14:34:16 +0000 |
| commit | 77fe64b172a6d1847ec80b6fa34ac06816a4030d (patch) | |
| tree | 7164664bc5220b2deaafd58016fce60765c2ab3d /dev/c/lib.html | |
| parent | 7e21c0085fec669979039856ea3754ac9573bbf3 (diff) | |
| download | doc-77fe64b172a6d1847ec80b6fa34ac06816a4030d.tar.gz | |
dev c added initial libraries
Diffstat (limited to 'dev/c/lib.html')
| -rw-r--r-- | dev/c/lib.html | 167 |
1 files changed, 167 insertions, 0 deletions
diff --git a/dev/c/lib.html b/dev/c/lib.html new file mode 100644 index 0000000..d1c9c28 --- /dev/null +++ b/dev/c/lib.html @@ -0,0 +1,167 @@ +<!DOCTYPE html> +<html dir="ltr" lang="en"> + <head> + <meta charset='utf-8'> + <title>Libraries</title> + </head> + <body> + <a href="../index.html">Development Index</a> + + + <h1>Libraries</h1> + + <h2>Basic</h2> + + <dl> + <dt>include <unistd.h></dt> + <dd>fork, pipe and I/O primitives (read, write, close, etc.) + + primitve types like uid_t, pid_t etc</dd> + + <dt>#include <stdlib.h></dt> + <dd>Standard lib, contains primitves for number conversion + and memory allocation</dd> + <dt>#include <stdio.h></dt> + <dd>Basic i/o lib: printf etc</dd> + + <dt>#include <string.h></dt> + <dd>String manipulations</dd> + + <dt>#include <time.h></dt> + <dd>Time related functions</dd> + + <dt>#include <signal.h></dt> + <dd>Signal handling</dd> + + <dt>#include <stdbool.h></dt> + <dd>Boolean type</dd> + + <dt>#include <math.h></dt> + <dd>Math functions</dd> + </dl> + + <h2>Advanced</h2> + <dl> + <dt>#include <sys/socket.h></dt> + <dd> socket connections</dd> + <dt>#include <sys/types.h></dt> + <dd> primitive types like uid_t, pid_t etc</dd> + + <dt>#include <netinet/in.h></dt> + <dd> internet address family</dd> + + <dt>#include <arpa/inet.h></dt> + <dd> definitions for internet operations</dd> + + <dt>#include <pthread.h></dt> + <dd> threads</dd> + + <dt>#include <stdatomic.h></dt> + <dd> mutual exclusion locks</dd> + + </dl> + + <h2>Stdio</h2> + + <h3>File Modes</h3> + + <pre> + mode Description + "r" Opens a file for reading. The file must exist. + "w" Creates an empty file for writing. If a file with the same name already exists, its content is erased and the file is considered as a new empty file. + "a" Appends to a file. Writing operations, append data at the end of the file. The file is created if it does not exist. + "r" Opens a file to update both reading and writing. The file must exist. + "w" Creates an empty file for both reading and writing. + "a" Opens a file for reading and appending. + </pre> + + <pre> + // ERROR: result == NULL (also when EOF is reached) + char *fgets(char *str, int strlen, FILE *stream); + + // ERROR: result == NULL + FILE *fopen(const char *filename, const char *mode); + + // result == EOF when finished reading the stream + // SUCCESS: number of matched items on success + int fscanf(FILE *stream, const char *format, ...); + + // ERROR: result == EOF + // SUCCESS: result == 0 + int fclose(FILE *stream); + + // ERROR: result == -1 + // SUCCESS: number of bytes written + ssize_t write(int fildes, const void *buf, size_t nbyte); + + // ERROR: result == -1 + // EOF when finished reading + // SUCCESS: number of bytes read + ssize_t read(int fildes, void *buf, size_t nbyte); + + // SUCCESS: result > 0 + // ERROR: result == EOF + int fputs(const char *restrict s, FILE *restrict stream); + </pre> + + <h2>Strings</h2> + + <pre> + // SUCCESS: pointer to destination string + char *strcpy(char *dest, const char *src); + + // result == 0 -> strings are equal + // result < 0 -> str1 less than str2 + // result > 0 -> str2 less than str1 + int strcmp(const char *str1, const char *str2);; + + + // result == NULL -> no tokens left to retrieve + // else: pointer to last token found + char *strtok(char *str, const char *delim); + + // NULL if no match + // else: pointer to first occurence in string + char *strstr(const char *string, const char *substring); + + // ERROR: result == 0 + int atoi(const char *str); + </pre> + + <h2>Networking</h2> + + <pre> + // ERROR: result == -1 + // example: sock = socket(AF_INET, SOCK_STREAM, 0); + int socket(int domain, int type, int protocol); + + // sockaddr_in struct (man ip 4) + struct sockaddr_in server; + server.sin_family = PF_INET; + server.sin_addr.s_addr = INADDR_ANY; + server.sin_port = htons(8080); + + // ERROR: result < 0 + // SUCCESS: result == 0 + // example: bind(sock, (struct sockaddr *) &server, sizeof(server)) + int bind(int sockfd, const struct sockaddr *my_addr, socklen_t addrlen); + + // ERROR: result < 0 + // SUCCESS: filedeskriptor for accepted socket + // example: fd = accept(sock, (struct sockaddr *) &client, &client_len); + int accept(int sockfd, struct sockaddr *addr, socklen_t *addrlen); + + // SUCCESS: result == 0 + // ERROR: result == -1 + int listen(int socket, int backlog); + </pre> + + <a href="../index.html">Development Index</a> + + <p> + This is part of the c9-doc Manual. + Copyright (C) 2018 + c9 team. + See the file <a href="../../fdl-1.3-standalone.html">Gnu Free Documentation License</a> + for copying conditions.</p> + </body> +</html> |