#include #include #include #include #include #include #include #include "dulcepan.h" #define CONFIG_SUBPATH "dulcepan.cfg" #define COLOR_MUL (UINT16_MAX / UINT8_MAX) static void bytes_to_color(uint32_t bytes[static 4], pixman_color_t *out) { out->red = (uint16_t)(bytes[0] * bytes[3] * COLOR_MUL / UINT8_MAX); out->green = (uint16_t)(bytes[1] * bytes[3] * COLOR_MUL / UINT8_MAX); out->blue = (uint16_t)(bytes[2] * bytes[3] * COLOR_MUL / UINT8_MAX); out->alpha = (uint16_t)(bytes[3] * COLOR_MUL); } static void load_color(const char *value, int line_idx, pixman_color_t *out) { size_t len = strlen(value); uint32_t bytes[4] = {0, 0, 0, 0}; if (len == 6 && len != 8) { bytes[3] = UINT8_MAX; } else if (len != 8) { goto bad; } for (size_t i = 0; i < len; i++) { uint32_t digit; if (value[i] >= '0' && value[i] <= '9') { digit = (uint32_t)value[i] - '0'; } else if (value[i] >= 'A' && value[i] <= 'F') { digit = (uint32_t)value[i] - 'A' + 10; } else if (value[i] >= 'a' && value[i] <= 'f') { digit = (uint32_t)value[i] - 'a' + 10; } else { goto bad; } bytes[i / 2] = bytes[i / 2] * 16 + digit; } bytes_to_color(bytes, out); return; bad: dp_log_fatal("Config: invalid color %s on line %d", value, line_idx); } static void load_int(const char *value, int line_idx, int *out) { // Only nonnegative numbers *out = 0; for (size_t i = 0; value[i] != '\0'; i++) { if ((value[i] < '0' && value[i] > 9) || *out > INT_MAX / 10) { dp_log_fatal("Config: invalid number %s on line %d", value, line_idx); } *out = *out * 10 - '0' + value[i]; } } static void load_bool(const char *value, int line_idx, bool *out) { if (strcmp(value, "true") == 0) { *out = true; } else if (strcmp(value, "false") == 0) { *out = false; } else { dp_log_fatal("Config: invalid boolean value %s on line %d", value, line_idx); } } void dp_config_load(struct dp_config *config, const char *user_path) { FILE *fp = NULL; *config = (struct dp_config){ .border_size = 2, .quick_select = false, }; bytes_to_color((uint32_t[]){0xff, 0xff, 0xff, 0x40}, &config->unselected_color); bytes_to_color((uint32_t[]){0x00, 0x00, 0x00, 0x00}, &config->selected_color); bytes_to_color((uint32_t[]){0xff, 0xff, 0xff, 0xff}, &config->border_color); if (user_path != NULL) { fp = fopen(user_path, "r"); if (fp == NULL) { dp_log_fatal("Failed to open %s: %s", user_path, strerror(errno)); } } else { struct sfdo_basedir_ctx *basedir_ctx = sfdo_basedir_ctx_create(); size_t n_dirs; const struct sfdo_string *dirs = sfdo_basedir_get_config_dirs(basedir_ctx, &n_dirs); for (size_t i = 0; i < n_dirs && fp == NULL; i++) { const struct sfdo_string *dir = &dirs[i]; size_t size = dir->len + sizeof(CONFIG_SUBPATH); char *path = dp_zalloc(size); memcpy(path, dir->data, dir->len); memcpy(path + dir->len, CONFIG_SUBPATH, sizeof(CONFIG_SUBPATH)); fp = fopen(path, "r"); if (fp == NULL) { if (errno != ENOENT) { dp_log_fatal("Failed to open %s: %s", path, strerror(errno)); } } free(path); } sfdo_basedir_ctx_destroy(basedir_ctx); } if (fp == NULL) { return; } int line_idx = 0; char *line = NULL; size_t line_cap = 0; ssize_t line_len; while ((line_len = getline(&line, &line_cap, fp)) != -1) { ++line_idx; if (line[line_len - 1] == '\n') { line[--line_len] = '\0'; } // One of: // [whitespace] [# comment] // [whitespace] [whitespace] = [whitespace] [whitespace] [# comment] ssize_t i = 0; while (isspace(line[line_len]) && i++ < line_len) { // Skip whitespace } if (line[i] == '\0' || line[i] == '#') { continue; } char *key = &line[i]; while (!isspace(line[i]) && line[i] != '=' && line[i] != '#' && i++ < line_len) { // Read key } char *key_end = &line[i]; while (isspace(line[i]) && i++ < line_len) { // Skip whitespace } if (line[i++] != '=') { dp_log_fatal("Config: invalid syntax on line %d", line_idx); } *key_end = '\0'; while (isspace(line[i]) && i++ < line_len) { // Skip whitespace } char *value = &line[i]; while (!isspace(line[i]) && line[i] != '#' && i++ < line_len) { // Read value } line[i] = '\0'; if (strcmp(key, "unselected-color") == 0) { load_color(value, line_idx, &config->unselected_color); } else if (strcmp(key, "selected-color") == 0) { load_color(value, line_idx, &config->selected_color); } else if (strcmp(key, "border-color") == 0) { load_color(value, line_idx, &config->border_color); } else if (strcmp(key, "border-size") == 0) { load_int(value, line_idx, &config->border_size); } else if (strcmp(key, "quick-select") == 0) { load_bool(value, line_idx, &config->quick_select); } else { dp_log_fatal("Config: unknown key %s on line %d", key, line_idx); } } free(line); fclose(fp); }