io.h

   1 /* Copyright (c) 2006-2013 Jonas Fonseca <fonseca@diku.dk>
   2  *
   3  * This program is free software; you can redistribute it and/or
   4  * modify it under the terms of the GNU General Public License as
   5  * published by the Free Software Foundation; either version 2 of
   6  * the License, or (at your option) any later version.
   7  *
   8  * This program is distributed in the hope that it will be useful,
   9  * but WITHOUT ANY WARRANTY; without even the implied warranty of
  10  * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE.  See the
  11  * GNU General Public License for more details.
  12  */
  13
  14 #ifndef TIG_IO_H
  15 #define TIG_IO_H
  16
  17 #include "tig.h"
  18
  19 /*
  20  * Argument array helpers.
  21  */
  22
  23 bool argv_to_string(const char *argv[SIZEOF_ARG], char *buf, size_t buflen, const char *sep);
  24 bool argv_from_string_no_quotes(const char *argv[SIZEOF_ARG], int *argc, char *cmd);
  25 bool argv_from_string(const char *argv[SIZEOF_ARG], int *argc, char *cmd);
  26 bool argv_from_env(const char **argv, const char *name);
  27 void argv_free(const char *argv[]);
  28 size_t argv_size(const char **argv);
  29 bool argv_append(const char ***argv, const char *arg);
  30 bool argv_append_array(const char ***dst_argv, const char *src_argv[]);
  31 bool argv_copy(const char ***dst, const char *src[]);
  32 bool argv_remove_quotes(const char *argv[]);
  33
  34 /*
  35  * Encoding conversion.
  36  */
  37
  38 struct encoding;
  39
  40 struct encoding *encoding_open(const char *fromcode);
  41 char *encoding_convert(struct encoding *encoding, char *line);
  42
  43 /*
  44  * Executing external commands.
  45  */
  46
  47 enum io_type {
  48         IO_FD,                  /* File descriptor based IO. */
  49         IO_BG,                  /* Execute command in the background. */
  50         IO_FG,                  /* Execute command with same std{in,out,err}. */
  51         IO_RD,                  /* Read only fork+exec IO. */
  52         IO_RD_STDIN,            /* Read only fork+exec IO with stdin. */
  53         IO_WR,                  /* Write only fork+exec IO. */
  54         IO_AP,                  /* Append fork+exec output to file. */
  55 };
  56
  57 struct io {
  58         int pipe;               /* Pipe end for reading or writing. */
  59         pid_t pid;              /* PID of spawned process. */
  60         int error;              /* Error status. */
  61         char *buf;              /* Read buffer. */
  62         size_t bufalloc;        /* Allocated buffer size. */
  63         size_t bufsize;         /* Buffer content size. */
  64         char *bufpos;           /* Current buffer position. */
  65         unsigned int eof:1;     /* Has end of file been reached. */
  66         int status:8;           /* Status exit code. */
  67 };
  68
  69 typedef int (*io_read_fn)(char *, size_t, char *, size_t, void *data);
  70
  71 bool io_open(struct io *io, const char *fmt, ...) PRINTF_LIKE(2, 3);
  72 bool io_kill(struct io *io);
  73 bool io_done(struct io *io);
  74 bool io_run(struct io *io, enum io_type type, const char *dir, char * const env[], const char *argv[], ...);
  75 bool io_run_bg(const char **argv);
  76 bool io_run_fg(const char **argv, const char *dir);
  77 bool io_run_append(const char **argv, int fd);
  78 bool io_eof(struct io *io);
  79 int io_error(struct io *io);
  80 char * io_strerror(struct io *io);
  81 bool io_can_read(struct io *io, bool can_block);
  82 ssize_t io_read(struct io *io, void *buf, size_t bufsize);
  83 char * io_get(struct io *io, int c, bool can_read);
  84 bool io_write(struct io *io, const void *buf, size_t bufsize);
  85 bool io_printf(struct io *io, const char *fmt, ...) PRINTF_LIKE(2, 3);
  86 bool io_read_buf(struct io *io, char buf[], size_t bufsize);
  87 bool io_run_buf(const char **argv, char buf[], size_t bufsize);
  88 int io_load(struct io *io, const char *separators,
  89             io_read_fn read_property, void *data);
  90 int io_run_load(const char **argv, const char *separators,
  91                 io_read_fn read_property, void *data);
  92
  93 #endif
  94
  95 /* vim: set ts=8 sw=8 noexpandtab: */