ref: 2d1427662054bfd81ce672ffe598fdb2ea83e2aa
dir: /sysmisc.c/
#include "sysmisc.h"
#include "gbuffer.h"
#include "oso.h"
#include <ctype.h>
ORCA_FORCE_NO_INLINE
Cboard_error cboard_copy(Glyph const* gbuffer, Usz field_height,
Usz field_width, Usz rect_y, Usz rect_x, Usz rect_h,
Usz rect_w) {
(void)field_height;
FILE* fp = popen("xclip -i -selection clipboard 2>/dev/null", "w");
if (!fp)
return Cboard_error_popen_failed;
for (Usz iy = 0; iy < rect_h; iy++) {
Glyph const* row = gbuffer + (rect_y + iy) * field_width + rect_x;
fwrite(row, sizeof(Glyph), rect_w, fp);
if (iy + 1 < rect_h)
fputc('\n', fp);
}
int status = pclose(fp);
return status ? Cboard_error_process_exit_error : Cboard_error_none;
}
ORCA_FORCE_NO_INLINE
Cboard_error cboard_paste(Glyph* gbuffer, Usz height, Usz width, Usz y, Usz x,
Usz* out_h, Usz* out_w) {
FILE* fp = popen("xclip -o -selection clipboard 2>/dev/null", "r");
Usz start_y = y, start_x = x, max_y = y, max_x = x;
if (!fp)
return Cboard_error_popen_failed;
char inbuff[512];
for (;;) {
size_t n = fread(inbuff, 1, sizeof inbuff, fp);
for (size_t i = 0; i < n; i++) {
char c = inbuff[i];
if (c == '\r' || c == '\n') {
y++;
x = start_x;
continue;
}
if (c != ' ' && y < height && x < width) {
Glyph g = is_valid_glyph((Glyph)c) ? (Glyph)c : '.';
gbuffer_poke(gbuffer, height, width, y, x, g);
if (x > max_x)
max_x = x;
if (y > max_y)
max_y = y;
}
x++;
}
if (n < sizeof inbuff)
break;
}
int status = pclose(fp);
*out_h = max_y - start_y + 1;
*out_w = max_x - start_x + 1;
return status ? Cboard_error_process_exit_error : Cboard_error_none;
}
ORCA_FORCE_NO_INLINE
Conf_read_result conf_read_line(FILE* file, char* buf, Usz bufsize,
char** out_left, Usz* out_leftsize,
char** out_right, Usz* out_rightsize) {
// a0 and a1 are the start and end positions of the left side of an "foo=bar"
// pair. b0 and b1 are the positions right side. Leading and trailing spaces
// will be removed.
Usz len, a0, a1, b0, b1;
char* s;
if (bufsize < 2)
goto insufficient_buffer;
#if SIZE_MAX > INT_MAX
if (bufsize > (Usz)INT_MAX)
exit(1); // he boot too big
#endif
s = fgets(buf, (int)bufsize, file);
if (!s) {
if (feof(file))
goto eof;
goto ioerror;
}
len = strlen(buf);
if (len == bufsize - 1 && buf[len - 1] != '\n' && !feof(file))
goto insufficient_buffer;
a0 = 0;
for (;;) { // scan for first non-space in " foo=bar"
if (a0 == len)
goto ignore;
char c = s[a0];
if (c == ';' || c == '#') // comment line, ignore
goto ignore;
if (c == '=') // '=' before any other char, bad
goto ignore;
if (!isspace(c))
break;
a0++;
}
a1 = a0;
for (;;) { // scan for '='
a1++;
if (a1 == len)
goto ignore;
char c = s[a1];
Usz x = a1; // don't include any whitespace preceeding the '='
while (isspace(c)) {
x++;
if (x == len)
goto ignore;
c = s[x];
}
if (c == '=') {
b0 = x;
break;
}
a1 = x;
}
for (;;) { // scan for first non-whitespace after '='
b0++;
if (b0 == len)
goto ignore;
char c = s[b0];
if (!isspace(c))
break;
}
b1 = b0;
for (;;) { // scan for end of useful stuff for right-side value
b1++;
if (b1 == len)
goto ok;
char c = s[b1];
Usz x = b1; // don't include any whitespace preceeding the EOL
while (isspace(c)) {
x++;
if (x == len)
goto ok;
c = s[x];
}
b1 = x;
}
Conf_read_result err;
insufficient_buffer:
err = Conf_read_buffer_too_small;
goto fail;
eof:
err = Conf_read_eof;
goto fail;
ioerror:
err = Conf_read_io_error;
goto fail;
fail:
*out_left = NULL;
*out_leftsize = 0;
goto no_right;
ignore:
s[len - 1] = '\0';
*out_left = s;
*out_leftsize = len;
err = Conf_read_irrelevant;
goto no_right;
no_right:
*out_right = NULL;
*out_rightsize = 0;
return err;
ok:
s[a1] = '\0';
s[b1] = '\0';
*out_left = s + a0;
*out_leftsize = a1 - a0;
*out_right = s + b0;
*out_rightsize = b1 - b0;
return Conf_read_left_and_right;
}
typedef enum {
Conf_dir_ok = 0,
Conf_dir_no_home,
} Conf_dir_error;
static char const* const xdg_config_home_env = "XDG_CONFIG_HOME";
static char const* const home_env = "HOME";
static char const* const conf_file_name = "/orca.conf";
static Conf_dir_error try_get_conf_dir(oso** out) {
char const* xdgcfgdir = getenv(xdg_config_home_env);
if (xdgcfgdir) {
Usz xdgcfgdirlen = strlen(xdgcfgdir);
if (xdgcfgdirlen > 0) {
osoputlen(out, xdgcfgdir, xdgcfgdirlen);
return Conf_dir_ok;
}
}
char const* homedir = getenv(home_env);
if (homedir) {
Usz homedirlen = strlen(homedir);
if (homedirlen > 0) {
osoputprintf(out, "%s/.config", homedir);
return Conf_dir_ok;
}
}
return Conf_dir_no_home;
}
FILE* conf_file_open_for_reading(void) {
oso* path = NULL;
if (try_get_conf_dir(&path))
return NULL;
osocat(&path, conf_file_name);
if (!path)
return NULL;
FILE* file = fopen(osoc(path), "r");
osofree(path);
return file;
}