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#include <stdio.h>
#include <stdlib.h>
#include <string.h>
#include <ctype.h>
#include "ctimeline.h"
#include "ui-common.h"
#define COMMENT_CHAR '#'
#define INIT_CAPACITY_LIST 8
struct ctimeline_context ctx; // from ctimeline.h
static void prepare_context()
{
memset(&ctx, 0, sizeof(ctx));
ctx.head_title = string_alloc(NULL, "Timeline browser");
ctx.css = string_alloc(NULL, "ctimeline.css");
ctx.header_title = string_alloc(NULL, "CTimeline");
ctx.header_desc = string_alloc(NULL, "Web frontend for timelines written in C");
ctx.branches.list = NULL;
ctx.branches.count = 0;
ctx.branches.capacity = 0;
ctx.cur_branch = NULL;
}
/*
* The function lies.
* It doesn't forget the context, just frees dynamic memory
*/
static void forget_context()
{
int i;
string_release(ctx.head_title);
string_release(ctx.css);
string_release(ctx.header_title);
string_release(ctx.header_desc);
for(i = 0; i < ctx.branches.count; i++) {
string_release(ctx.branches.list[i].name);
string_release(ctx.branches.list[i].desc);
}
free(ctx.branches.list);
}
static int cmp_by_age(const void *f, const void *s)
{
struct ctimeline_branch *b1 = (struct ctimeline_branch *)f;
struct ctimeline_branch *b2 = (struct ctimeline_branch *)s;
if(b2->age_to == b1->age_to) {
return b2->age_from - b1->age_from;
}
else
return b2->age_to - b1->age_to;
}
void sort_branches_by_age()
{
qsort(ctx.branches.list,
ctx.branches.count, sizeof(struct ctimeline_branch),
cmp_by_age);
}
struct ctimeline_branch *add_branch(const char *name)
{
struct ctimeline_branch *br;
ctx.branches.count++;
if(ctx.branches.count > ctx.branches.capacity) {
if(ctx.branches.capacity == 0)
ctx.branches.capacity = INIT_CAPACITY_LIST;
else
ctx.branches.capacity *= 2;
ctx.branches.list = realloc(ctx.branches.list,
sizeof(struct ctimeline_branch) * ctx.branches.capacity);
}
br = &ctx.branches.list[ctx.branches.count-1];
br->name = string_alloc(NULL, name);
br->age_from = 0;
br->age_to = 0;
br->desc = string_alloc(NULL, "No description");
return br;
}
void handle_branch_context(const char *name, const char *value)
{
if(strcmp(name, "branch.name") == 0) {
ctx.cur_branch = add_branch(value);
}
else if(!ctx.cur_branch) {
return;
}
else if(strcmp(name, "branch.age_from") == 0) {
ctx.cur_branch->age_from = atoi(value);
}
else if(strcmp(name, "branch.age_to") == 0) {
ctx.cur_branch->age_to = atoi(value);
}
else if(strcmp(name, "branch.desc") == 0) {
ctx.cur_branch->desc = string_alloc(
ctx.cur_branch->desc, value);
}
}
void handle_config_context(const char *name, const char *value)
{
if(strcmp(name, "title") == 0) {
ctx.head_title = string_alloc(
ctx.head_title, value);
}
else if(strcmp(name, "css") == 0) {
ctx.css = string_alloc(
ctx.css, value);
}
else if(strcmp(name, "header.title") == 0) {
ctx.header_title = string_alloc(
ctx.header_title, value);
}
else if(strcmp(name, "header.desc") == 0) {
ctx.header_desc = string_alloc(
ctx.header_desc, value);
}
else
handle_branch_context(name, value);
}
void skip_line(FILE *f)
{
int c;
while( (c = fgetc(f)) && c != '\n' && c != EOF )
;
}
int read_config_line(FILE *f, string *name, string *value)
{
int c;
// skip comments and white spaces
for(;;) {
c = fgetc(f);
if(c == EOF)
return 1;
else if(c == COMMENT_CHAR)
skip_line(f);
else if(!isspace(c))
break;
}
// read variable name
while(c != '=') {
if(isspace(c) || c == EOF)
return 1;
string_addch(name, c);
c = fgetc(f);
}
// read variable value
c = fgetc(f);
while(c != '\n' && c != EOF) {
string_addch(value, c);
c = fgetc(f);
}
return 0;
}
int parse_config_file(const char *fname)
{
FILE *f = fopen(fname, "r");
if(!f) // #TODO: print warning in logs
return 1;
string *name = string_alloc(NULL, NULL);
string *value = string_alloc(NULL, NULL);
while(read_config_line(f, name, value) == 0) {
handle_config_context(name->s, value->s);
string_reset(name);
string_reset(value);
}
string_release(name);
string_release(value);
fclose(f);
return 0;
}
int main(int argc, char **argv)
{
prepare_context();
parse_config_file(CTIMELINE_CONFIG);
sort_branches_by_age();
print_http_headers();
print_document_start();
print_document_header();
print_timelines();
print_document_end();
forget_context();
return 0;
}
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