155 lines
3.2 KiB
C
155 lines
3.2 KiB
C
/*
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* Copyright (c) 2020 Andri Yngvason
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*
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* Permission to use, copy, modify, and/or distribute this software for any
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* purpose with or without fee is hereby granted, provided that the above
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* copyright notice and this permission notice appear in all copies.
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*
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* THE SOFTWARE IS PROVIDED "AS IS" AND THE AUTHOR DISCLAIMS ALL WARRANTIES WITH
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* REGARD TO THIS SOFTWARE INCLUDING ALL IMPLIED WARRANTIES OF MERCHANTABILITY
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* AND FITNESS. IN NO EVENT SHALL THE AUTHOR BE LIABLE FOR ANY SPECIAL, DIRECT,
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* INDIRECT, OR CONSEQUENTIAL DAMAGES OR ANY DAMAGES WHATSOEVER RESULTING FROM
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* LOSS OF USE, DATA OR PROFITS, WHETHER IN AN ACTION OF CONTRACT, NEGLIGENCE
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* OR OTHER TORTIOUS ACTION, ARISING OUT OF OR IN CONNECTION WITH THE USE OR
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* PERFORMANCE OF THIS SOFTWARE.
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*/
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#include <stdio.h>
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#include <stdlib.h>
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#include <string.h>
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#include <ctype.h>
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#include "cfg.h"
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#define XSTR(s) STR(s)
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#define STR(s) #s
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static char* cfg__get_default_path(void)
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{
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static char result[256];
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char* xdg_config_home = getenv("XDG_CONFIG_HOME");
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if (xdg_config_home) {
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snprintf(result, sizeof(result), "%s/wayvnc/config",
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xdg_config_home);
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result[sizeof(result) - 1] = '\0';
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return result;
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}
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char* home = getenv("HOME");
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if (!home)
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return NULL;
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snprintf(result, sizeof(result), "%s/.config/wayvnc/config", home);
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result[sizeof(result) - 1] = '\0';
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return result;
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}
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static char* cfg__trim_left(char* str)
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{
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while (isspace(*str))
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++str;
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return str;
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}
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static char* cfg__trim_right(char* str)
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{
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char* end = str + strlen(str) - 1;
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while (str < end && isspace(*end))
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*end-- = '\0';
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return str;
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}
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static inline char* cfg__trim(char* str)
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{
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return cfg__trim_right(cfg__trim_left(str));
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}
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static int cfg__load_key_value(struct cfg* self,
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const char* key, const char* value)
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{
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#define LOAD_bool(v) (strcmp(v, "false") != 0)
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#define LOAD_string(v) strdup(v)
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#define LOAD_uint(v) strtoul(v, NULL, 0)
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#define X(type, name) \
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if (strcmp(XSTR(name), key) == 0) { \
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self->name = LOAD_ ## type(value); \
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return 0; \
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}
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X_CFG_LIST
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#undef X
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#undef LOAD_uint
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#undef LOAD_string
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#undef LOAD_bool
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return -1;
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}
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static int cfg__load_line(struct cfg* self, char* line)
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{
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line = cfg__trim(line);
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if (line[0] == '\0' || line[0] == '#')
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return 0;
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char* delim = strchr(line, '=');
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if (!delim)
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return -1;
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*delim = '\0';
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char* key = cfg__trim_right(line);
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char* value = cfg__trim_left(delim + 1);
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return cfg__load_key_value(self, key, value);
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}
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int cfg_load(struct cfg* self, const char* requested_path)
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{
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const char* path = requested_path ? requested_path
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: cfg__get_default_path();
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if (!path)
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return -1;
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FILE* stream = fopen(path, "r");
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if (!stream)
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return -1;
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char* line = NULL;
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size_t len = 0;
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int lineno = 0;
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while (getline(&line, &len, stream) > 0) {
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++lineno;
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if (cfg__load_line(self, line) < 0)
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goto failure;
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}
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fclose(stream);
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return 0;
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failure:
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cfg_destroy(self);
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fclose(stream);
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return lineno;
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}
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void cfg_destroy(struct cfg* self)
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{
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#define DESTROY_bool(...)
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#define DESTROY_uint(...)
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#define DESTROY_string(p) free(p)
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#define X(type, name) DESTROY_ ## type(self->name);
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X_CFG_LIST
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#undef X
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#undef DESTROY_string
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#undef DESTROY_uint
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#undef DESTROY_bool
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}
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