Mercurial > repos > blastem
view config.c @ 504:7b0df1aaf384
Add support for left and right shift keys
author | Mike Pavone <pavone@retrodev.com> |
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date | Thu, 31 Oct 2013 01:00:32 -0700 |
parents | 6fc71114d145 |
children | 80a67be1770b |
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/* Copyright 2013 Michael Pavone This file is part of BlastEm. BlastEm is free software distributed under the terms of the GNU General Public License version 3 or greater. See COPYING for full license text. */ #include "tern.h" #include "util.h" #include <stdio.h> #include <stdlib.h> #include <string.h> #define MAX_NEST 30 //way more than I'll ever need tern_node * parse_config(char * config_data) { char *state, *curline; char *prefix = NULL; int nest_level = 0; char * prefix_parts[MAX_NEST]; int line = 1; tern_node * head = NULL; while ((curline = strtok_r(config_data, "\n", &state))) { config_data = NULL; curline = strip_ws(curline); int len = strlen(curline); if (!len) { continue; } if (curline[0] == '#') { continue; } if (curline[0] == '}') { if (!nest_level) { fprintf(stderr, "unexpected } on line %d\n", line); exit(1); } if (prefix) { free(prefix); prefix = NULL; } nest_level--; curline = strip_ws(curline+1); } char * end = curline + len - 1; if (*end == '{') { *end = 0; curline = strip_ws(curline); prefix_parts[nest_level++] = curline; if (prefix) { free(prefix); prefix = NULL; } } else { if (nest_level && !prefix) { prefix = alloc_concat_m(nest_level, prefix_parts); } char * val = strip_ws(split_keyval(curline)); char * key = curline; if (*key) { if (prefix) { key = alloc_concat(prefix, key); } head = tern_insert_ptr(head, key, strdup(val)); if (prefix) { free(key); } } } } if (prefix) { free(prefix); } return head; } tern_node * parse_config_file(char * config_path) { tern_node * ret = NULL; FILE * config_file = fopen(config_path, "r"); if (!config_file) { goto open_fail; } long config_size = file_size(config_file); if (!config_size) { goto config_empty; } char * config_data = malloc(config_size); if (fread(config_data, 1, config_size, config_file) != config_size) { goto config_read_fail; } ret = parse_config(config_data); config_read_fail: free(config_data); config_empty: fclose(config_file); open_fail: return ret; } tern_node * load_config() { char * exe_dir; char * home = getenv("HOME"); if (!home) { goto load_in_app_dir; } char * path = alloc_concat(home, "/.config/blastem/blastem.cfg"); tern_node * ret = parse_config_file(path); if (ret) { goto success; } free(path); load_in_app_dir: exe_dir = get_exe_dir(); if (!exe_dir) { goto no_config; } path = alloc_concat(exe_dir, "/default.cfg"); ret = parse_config_file(path); free(path); success: if (ret) { return ret; } no_config: fputs("Failed to find a config file in ~/.config/blastem/blastem.cfg or in the blastem executable directory\n", stderr); exit(1); }