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-rw-r--r--libmiav/miav_config.cc492
1 files changed, 492 insertions, 0 deletions
diff --git a/libmiav/miav_config.cc b/libmiav/miav_config.cc
new file mode 100644
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+++ b/libmiav/miav_config.cc
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+/* -*- Mode: C++; tab-width: 2; indent-tabs-mode: nil; c-basic-offset: 2 -*- */
+/***************************************************************************
+ * miav_config.cc
+ *
+ * Sat Feb 19 14:13:19 CET 2005
+ * Copyright 2005 Bent Bisballe
+ * deva@aasimon.org
+ ****************************************************************************/
+
+/*
+ * This file is part of MIaV.
+ *
+ * MIaV is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU General Public License as published by
+ * the Free Software Foundation; either version 2 of the License, or
+ * (at your option) any later version.
+ *
+ * MIaV is distributed in the hope that it will be useful,
+ * but WITHOUT ANY WARRANTY; without even the implied warranty of
+ * MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
+ * GNU General Public License for more details.
+ *
+ * You should have received a copy of the GNU General Public License
+ * along with MIaV; if not, write to the Free Software
+ * Foundation, Inc., 59 Temple Place, Suite 330, Boston, MA 02111-1307 USA.
+ */
+#include <config.h>
+#include "miav_config.h"
+
+MiavConfig *config;
+
+MiavConfig::MiavConfig(char *file, Info *i)
+{
+ info = i;
+ configs = NULL;
+
+ filename = string(file);
+
+ // Read config file
+ FILE* fp = fopen(file, "r");
+
+ if(!fp) {
+ if(info) info->error("Error reading configuration file %s\n", file);
+ else fprintf(stderr, "Error reading configuration file %s\n", file);
+ return;
+ }
+ fseek(fp, 0, SEEK_END);
+ int fsz = ftell(fp) + 1;
+ fseek(fp, 0, SEEK_SET);
+
+ char *raw = (char*)calloc(fsz, 1);
+ fread(raw, 1, fsz, fp);
+
+ fclose(fp);
+
+ configs = parse(raw);
+
+ free(raw);
+}
+
+MiavConfig::~MiavConfig()
+{
+ _cfg *die = NULL;
+ _cfg *cfg = configs;
+
+ while(cfg) {
+ if(die) free(die);
+ die = cfg;
+ cfg = cfg->next;
+ }
+ if(die) free(die);
+}
+
+/**
+ * Prints a reasonable error message when a parse error occurres.
+ */
+void MiavConfig::parseError(char* msg, _cfg* cfg)
+{
+ if(info) info->error("Error parsing file %s at line %d:\n\t%s\n\t%s\n",
+ filename.c_str(),
+ cfg->line,
+ cfg->orig,
+ msg);
+ else fprintf(stderr, "Error parsing file %s at line %d:\n\t%s\n\t%s\n",
+ filename.c_str(),
+ cfg->line,
+ cfg->orig,
+ msg);
+}
+
+_cfg* MiavConfig::readLines(char* raw)
+{
+ int line = 1;
+
+ _cfg *first = (_cfg*)calloc(1, sizeof(_cfg));
+ _cfg *current = first;
+ _cfg *next = NULL;
+
+ char *nl = strchr(raw, '\n');
+
+ while(nl != NULL) {
+ int len = nl - raw;
+
+ current->line = line;
+
+ current->orig = (char*) calloc(len + 1, 1);
+ strncpy(current->orig, raw, len);
+
+ // Find next newline
+ raw = nl+1;
+ nl = strchr(raw, '\n');
+
+ line++;
+
+ // Add _cfg
+ if(nl != NULL) {
+ next = (_cfg*)calloc(1, sizeof(_cfg));
+ current->next = next;
+ current = next;
+ } else {
+ current->next = NULL;
+ }
+ }
+
+ return first;
+}
+
+_cfg* MiavConfig::parseLines(_cfg *cfg)
+{
+ if(cfg == NULL) return NULL;
+
+ char *l = cfg->left = (char*)calloc(1, strlen(cfg->orig));
+ char *r = cfg->right = (char*)calloc(1, strlen(cfg->orig));
+
+ char *p = cfg->orig;
+
+ // Skip leftmost whitespace
+ while(p < cfg->orig + strlen(cfg->orig) && strchr("\t ", *p)) {
+ p++;
+ }
+
+ // Empty line, with whitespaces
+ if(p == cfg->orig + strlen(cfg->orig)) {
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ // Parse left side
+ while(p < cfg->orig + strlen(cfg->orig) && !strchr("\t ", *p)) {
+ if(strchr("#", *p)) {
+ if(l != cfg->left) parseError("Incomplete line.", cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ if(strchr("=", *p)) break;
+
+ if(strchr("ABCDEFGHIJKLMNOPQRSTUVWXYZabcdefghijklmnopqrstuvwxyz0123456789_", *p)) {
+ *l = *p;
+ l++;
+ } else {
+ char buf[256];
+ sprintf(buf, "Invalid left hand side character at [%s].", p);
+ parseError(buf, cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ p++;
+ }
+
+ // Skip whitespace
+ while(p < cfg->orig + strlen(cfg->orig) && strchr("\t ", *p)) {
+ p++;
+ }
+
+ if(*p != '=') {
+ parseError("Expected '='.", cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+ p++; // Get past the '='
+
+ // Skip whitespace
+ while(p < cfg->orig + strlen(cfg->orig) && strchr("\t ", *p)) {
+ p++;
+ }
+
+ // Parse right hand side
+ int instring = 0;
+ while(p < cfg->orig + strlen(cfg->orig) && !(strchr("\t ", *p) && instring != 1)) {
+ if(*p == '\"') instring++;
+ if(instring > 2) {
+ parseError("Too many '\"'.", cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ if(instring == 1) {
+ // Accept all chars
+ *r= *p;
+ r++;
+ } else {
+ // Accept only those chars valid for the data types.
+ if(strchr("truefalseyesnoTRUEFALSEYESNO1234567890\",.-", *p)) {
+ if(*p == ',') *r= '.';
+ *r = *p;
+ r++;
+ } else if(!strchr("\n", *p)) {
+ char buf[256];
+ sprintf(buf, "Invalid right hand side character at [%s].", p);
+ parseError(buf, cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+ if(*p == '#') break;
+ }
+
+ p++;
+ }
+
+ // Skip whitespace
+ while(p < cfg->orig + strlen(cfg->orig) && strchr("\t ", *p)) {
+ p++;
+ }
+
+ // Detect if whitespace ocurred inside righthand value.
+ if(p != cfg->orig + strlen(cfg->orig)) {
+ parseError("Invalid use of whitespace.", cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ // Check for instring (string not ended)
+ if(instring == 1) {
+ parseError("String not closed.", cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ // Check for empty line
+ if(l == cfg->left && r == cfg->right) {
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ // Check for empty left side.
+ if(l == cfg->left) {
+ parseError("Empty left side.", cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ // Check for empty right side.
+ if(r == cfg->right) {
+ parseError("Empty right side.", cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return parseLines(next);
+ }
+
+ cfg->next = parseLines(cfg->next);
+ return cfg;
+}
+
+
+_cfg *MiavConfig::createSemantics(_cfg *cfg) {
+ if(cfg == NULL) return NULL;
+
+ cfg->type = CONFIG_UNKNOWN;
+
+ // Boolean - true
+ if(strcasecmp(cfg->right, "yes") == 0 ||
+ strcasecmp(cfg->right, "true") == 0) {
+ cfg->type = CONFIG_BOOL;
+ cfg->boolval = true;
+ }
+
+ // Boolean - false
+ if(strcasecmp(cfg->right, "no") == 0 ||
+ strcasecmp(cfg->right, "false") == 0) {
+ cfg->type = CONFIG_BOOL;
+ cfg->boolval = false;
+ }
+
+ // String
+ if(cfg->right[0] == '\"') {
+ cfg->type = CONFIG_STRING;
+ cfg->right[strlen(cfg->right) - 1] = '\0';
+ cfg->stringval = new string(cfg->right + 1);
+
+ }
+
+ // Number
+ bool number = true;
+ char *p = cfg->right;
+ while(p < cfg->right + strlen(cfg->right)) {
+ if(!strchr("01234567890.-", *p)) number = false;
+ p++;
+ }
+
+ // Integer
+ if(number && strstr(cfg->right, ".") == NULL ) {
+ cfg->type = CONFIG_INT;
+ cfg->intval = atoi(cfg->right);
+ }
+
+ // Float
+ if(number && strstr(cfg->right, ".") != NULL) {
+ cfg->type = CONFIG_FLOAT;
+ cfg->floatval = atof(cfg->right);
+ }
+
+ if(cfg->type == CONFIG_UNKNOWN) {
+ parseError("Unknown type (see 'man miav.conf' for valid right hand sides).", cfg);
+ _cfg* next = cfg->next;
+ free(cfg->orig);
+ free(cfg->left);
+ free(cfg->right);
+ free(cfg);
+ return createSemantics(next);
+ }
+
+ // Create name
+ cfg->name = new string(cfg->left);
+
+ cfg->next = createSemantics(cfg->next);
+ return cfg;
+}
+
+
+_cfg* MiavConfig::parse(char* raw)
+{
+ _cfg *first = readLines(raw);
+ first = parseLines(first);
+
+ first = createSemantics(first);
+
+ /*
+ _cfg* cfg = first;
+ while(cfg) {
+ printf("Node:\n");
+ printf("\tLine: [%d]\n", cfg->line);
+ printf("\tOrig: [%s]\n", cfg->orig);
+ printf("\tLeft: [%s]\n", cfg->left);
+ printf("\tRight: [%s]\n", cfg->right);
+
+ switch(cfg->type) {
+ case CONFIG_INT:
+ printf("\tInt value: %d\n", cfg->intval);
+ break;
+ case CONFIG_BOOL:
+ printf("\tBool value: %d\n", cfg->boolval);
+ break;
+ case CONFIG_FLOAT:
+ printf("\tFloat value: %f\n", cfg->floatval);
+ break;
+ case CONFIG_STRING:
+ printf("\tString value: %s\n", cfg->stringval->c_str());
+ break;
+ case CONFIG_UNKNOWN:
+ printf("\tUnknown type: %s\n", cfg->right);
+ break;
+ }
+
+ cfg= cfg->next;
+ }
+ */
+ return first;
+}
+
+int MiavConfig::readInt(char *node)
+{
+ _cfg* n = findNode(node);
+ if(n) {
+ if(n->type == CONFIG_INT) return n->intval;
+ parseError("Expected integer.", n);
+ }
+ return 0;
+}
+
+bool MiavConfig::readBool(char *node)
+{
+ _cfg* n = findNode(node);
+ if(n) {
+ if(n->type == CONFIG_BOOL) return n->boolval;
+ if(n->type == CONFIG_INT) return (n->intval != 0);
+ parseError("Expected boolean.", n);
+ }
+ return false;
+}
+
+string *MiavConfig::readString(char *node)
+{
+ _cfg* n = findNode(node);
+ if(n) {
+ if(n->type == CONFIG_STRING) return n->stringval;
+ parseError("Expected string.", n);
+ }
+ return &emptyString;
+}
+
+float MiavConfig::readFloat(char *node)
+{
+ _cfg* n = findNode(node);
+ if(n) {
+ if(n->type == CONFIG_FLOAT) return n->floatval;
+ if(n->type == CONFIG_INT) return (float)n->intval;
+ parseError("Expected float.", n);
+ }
+ return 0.0f;
+}
+
+_cfg *MiavConfig::findNode(char* node)
+{
+ _cfg *cfg = configs;
+
+ while(cfg) {
+ if(!strcmp(node, cfg->name->c_str())) return cfg;
+ cfg = cfg->next;
+ }
+ if(info) info->error("Missing line in configuration file: \"%s\"!\n", node);
+ else fprintf(stderr, "Missing line in configuration file: \"%s\"!\n", node);
+
+ return NULL;
+}
+
+#ifdef __TEST_MIAV_CONFIG
+
+int main(int argc, char *argv[]) {
+ if(argc < 2) {
+ fprintf(stderr, "usage:\n\tmiav_config [filename]\n");
+ return 1;
+ }
+
+ MiavConfig cfg(argv[1]);
+ printf("Server user: [%s]\n", cfg.readString("server_user")->c_str());
+ printf("Resolution: [%f]\n", cfg.readFloat("screensize"));
+ printf("Resolution (as int): [%d]\n", cfg.readInt("screensize"));
+ printf("Width: [%d]\n", cfg.readInt("pixel_width"));
+ printf("Width (as float): [%f]\n", cfg.readFloat("pixel_width"));
+ printf("Frame quality: [%d]\n", cfg.readInt("frame_quality"));
+ printf("Skip frames: [%d]\n", cfg.readBool("player_skip_frames"));
+ printf("Skip frames (as int): [%d]\n", cfg.readInt("player_skip_frames"));
+ printf("Frame quality (as bool): [%d]\n", cfg.readBool("frame_quality"));
+
+}
+
+#endif/* __TEST_MIAV_CONFIG*/
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