From 1b429c0fc28e5cd8b474ad5a1de1fa6f3d7c2e2a Mon Sep 17 00:00:00 2001 From: Marvin Borner Date: Mon, 12 Jul 2021 18:14:44 +0200 Subject: Renamed files to match presentation --- src/loader/cfg.c | 210 ------------------------------------------------------- 1 file changed, 210 deletions(-) delete mode 100644 src/loader/cfg.c (limited to 'src/loader/cfg.c') diff --git a/src/loader/cfg.c b/src/loader/cfg.c deleted file mode 100644 index bbe215a..0000000 --- a/src/loader/cfg.c +++ /dev/null @@ -1,210 +0,0 @@ -// MIT License, Copyright (c) 2021 Marvin Borner - -#include -#include -#include -#include -#include -#include - -// Keys -#define TIMEOUT "TIMEOUT" -#define PATH "PATH" - -// Config structure -static struct cfg cfg = { 0 }; - -// Config file contents (if found) -static char file[1024] = { 0 }; - -// Find config file -static u8 cfg_find(struct dev *dev) -{ - if (!dev->p.disk.fs.read) - return 0; // No fs found or not readable - continue! - - s32 res = dev->p.disk.fs.read("/boot/segelboot.cfg", file, 0, sizeof(file), dev); - if (res > 0) - return 1; // Break foreach - - // Continue foreach - return 0; -} - -// Checks if index is appropriate as some key/value need to be in entry -static void cfg_in_entry(u8 index) -{ - if (index == 0xff) - panic("No entry name given\n"); -} - -// Add/overwrite value by key and entry index -static void cfg_add(u8 index, enum cfg_key key, const char *value) -{ - struct cfg_entry *entry = &cfg.entry[index]; - entry->exists = 1; - - switch (key) { - case CFG_NAME: - cfg_in_entry(index); - strlcpy(entry->name, value, sizeof(entry->name)); - break; - case CFG_TIMEOUT: - cfg.timeout = atoi(value); - break; - case CFG_PATH: - cfg_in_entry(index); - strlcpy(entry->full_path, value, sizeof(entry->full_path)); - break; - case CFG_NONE: - default: - panic("Invalid config\n"); - } -} - -// TODO: This code is kind of messy -// Structure per line: KEY=VALUE -static void cfg_parse(void) -{ - // Entry index - u8 entry = 0xff; - - // Value per key - char value[64] = { 0 }; - u8 value_index = 0; - - // States - enum cfg_key current = CFG_NONE; // Value key type - u8 state = 0; // 0 is key, 1 is value, 2 is entry - - const char *start = file; // Start is at the beginning of the key - for (const char *p = start; *p; p++) { - if (state == 0) { - // We're at key parsing - if (*p == '\n') { // A key can't just end but ok - start = p + 1; - } else if (*p == '#') { - state = 2; // Let's parse the entry name - p++; - continue; - } else if (*p != '=') { - continue; - } - - // The key is now at start until p - u8 diff = p - start; - - // Timeout key - if (diff == sizeof(TIMEOUT) - 1 && memcmp(start, TIMEOUT, diff) == 0) { - current = CFG_TIMEOUT; - state = 1; - continue; - } - - // Path key - if (diff == sizeof(PATH) - 1 && memcmp(start, PATH, diff) == 0) { - current = CFG_PATH; - state = 1; - continue; - } - } else if (state == 1) { - // We're at value parsing - assert(value_index + 1 < (u8)sizeof(value)); - if (*p == '\n') { // Finished - value[value_index] = 0; - cfg_add(entry, current, value); - value_index = 0; - state = 0; - p--; // Repeat parse normally - } else { - value[value_index++] = *p; - } - } else if (state == 2) { - // We're at entry name parsing - assert(value_index + 1 < (u8)sizeof(value)); - if (*p == '\n') { // Finished - entry = entry == 0xff ? 0 : entry + 1; - value[value_index] = 0; - cfg_add(entry, CFG_NAME, value); - value_index = 0; - state = 0; - p--; // Repeat parse normally - } else { - value[value_index++] = *p; - } - } - } -} - -// Extract the disk from path by returning index of delimiter or 0xff -// Example: disk:/boot/config.cfg returns 4 (:) -static u8 cfg_path_disk(const char *path) -{ - for (const char *p = path; *p; p++) - if (*p == ':') - return p - path; - return 0xff; -} - -// Find matching disk dev for every entry and verify path existence and readability -static void cfg_verify(void) -{ - for (u8 i = 0; i < COUNT(cfg.entry) && cfg.entry[i].exists; i++) { - struct cfg_entry *entry = &cfg.entry[i]; - - u8 len = cfg_path_disk(entry->full_path); - struct dev *dev = dev_get_by_name(entry->full_path, len); - if (!dev || dev->type != DEV_DISK) - panic("Invalid device in config\n"); - entry->dev = dev; - - if (!dev->p.disk.fs.read) - panic("Device fs not readable\n"); - - // This is now the correct path (due to "disk:PATH") - const char *path = &entry->full_path[len + 1]; - entry->path = path; - - u8 buf[1] = { 0 }; // Just for existence-check - s32 ret = dev->p.disk.fs.read(path, buf, 0, sizeof(buf), dev); - if (ret != 1 || !buf[0]) - panic("Path is invalid\n"); - - if (!impl_detect(entry)) - panic("No boot implementation found\n"); - } -} - -// Call cb for each entry config -void cfg_foreach(u8 (*cb)(struct cfg_entry *)) -{ - for (u8 i = 0; i < COUNT(cfg.entry) && cfg.entry[i].exists; i++) { - if (cb(&cfg.entry[i])) // 1 means break - break; - } -} - -// Print all configs and entry values -static void cfg_print(void) -{ - log("[CFG] Global: %d\n", cfg.timeout); - - for (u8 i = 0; i < COUNT(cfg.entry) && cfg.entry[i].exists; i++) - log("[CFG] Entry: %s at %s\n", cfg.entry[i].name, cfg.entry[i].full_path); -} - -// Execute entry implementation -void cfg_exec(struct cfg_entry *entry) -{ - impl_exec(entry); -} - -void cfg_read(void) -{ - dev_foreach(DEV_DISK, &cfg_find); - if (!file[0]) - panic("No config found\n"); - cfg_parse(); - cfg_verify(); - cfg_print(); -} -- cgit v1.2.3