cinera.c 262 KB
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#if 0
ctime -begin ${0%.*}.ctm
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#gcc -g -fsanitize=address -Wall -std=c99 -pipe $0 -o ${0%.*} hmml.a -lcurl
gcc -O2 -Wall -std=c99 -pipe $0 -o ${0%.*} hmml.a -lcurl
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ctime -end ${0%.*}.ctm
exit
#endif

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typedef struct
{
    unsigned int Major, Minor, Patch;
} version;

version CINERA_APP_VERSION = {
    .Major = 0,
    .Minor = 5,
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    .Patch = 41
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};

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// TODO(matt): Copy in the DB 3 stuff from cinera_working.c
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#define CINERA_DB_VERSION 3
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#include <stdarg.h> // NOTE(matt): varargs
#include <stdio.h>  // NOTE(matt): printf, sprintf, vsprintf, fprintf, perror
#include <stdlib.h> // NOTE(matt): calloc, malloc, free
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#include "hmmlib.h"
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#include <getopt.h> // NOTE(matt): getopts
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//#include "config.h" // TODO(matt): Implement config.h
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#include <curl/curl.h>
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#include <time.h>
#include <sys/stat.h>
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#include <sys/types.h>
#include <dirent.h>
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#include <string.h> // NOTE(matt): strerror
#include <errno.h> //NOTE(matt): errno
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#include <sys/inotify.h> // NOTE(matt): inotify
#include <unistd.h> // NOTE(matt): sleep()
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typedef unsigned int bool;
#define TRUE 1
#define FALSE 0

#define DEBUG 0
#define DEBUG_MEM 0

bool PROFILING = 0;
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clock_t TIMING_START;
#define START_TIMING_BLOCK(...) if(PROFILING) { printf(__VA_ARGS__); TIMING_START = clock(); }
#define END_TIMING_BLOCK() if(PROFILING) { printf("\e[1;34m%ld\e[0m\n", clock() - TIMING_START);}

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#define Kilobytes(Bytes) Bytes << 10
#define Megabytes(Bytes) Bytes << 20

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#define MAX_PROJECT_ID_LENGTH 31
#define MAX_PROJECT_NAME_LENGTH 63
#define MAX_BASE_URL_LENGTH 127
#define MAX_RELATIVE_PAGE_LOCATION_LENGTH 31
#define MAX_PLAYER_URL_PREFIX_LENGTH 15

#define MAX_BASE_FILENAME_LENGTH 31
#define MAX_TITLE_LENGTH 128 - (MAX_BASE_FILENAME_LENGTH + 1) - (int)sizeof(link_insertion_offsets) - (int)sizeof(unsigned short int) - 1 // NOTE(matt): We size this such that index_metadata is 128 bytes total

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#define MAX_CUSTOM_SNIPPET_SHORT_LENGTH 255
#define MAX_CUSTOM_SNIPPET_LONG_LENGTH 1023

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enum
{
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    EDITION_SINGLE,
    EDITION_PROJECT,
    EDITION_NETWORK
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} editions;

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enum
{
    // NOTE(matt): https://tools.ietf.org/html/rfc5424#section-6.2.1
    LOG_EMERGENCY,
    LOG_ALERT,
    LOG_CRITICAL,
    LOG_ERROR,
    LOG_WARNING,
    LOG_NOTICE,
    LOG_INFORMATIONAL,
    LOG_DEBUG
} log_levels;

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enum
{
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    MODE_FORCEINTEGRATION = 1 << 0,
    MODE_ONESHOT          = 1 << 1,
    MODE_EXAMINE          = 1 << 2,
    MODE_NOCACHE          = 1 << 3,
    MODE_NOPRIVACY        = 1 << 4,
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} modes;

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enum
{
    RC_ARENA_FULL,
    RC_ERROR_DIRECTORY,
    RC_ERROR_FATAL,
    RC_ERROR_FILE,
    RC_ERROR_HMML,
    RC_ERROR_MAX_REFS,
    RC_ERROR_MEMORY,
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    RC_ERROR_PROJECT,
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    RC_ERROR_QUOTE,
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    RC_ERROR_SEEK,
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    RC_FOUND,
    RC_UNFOUND,
    RC_INVALID_REFERENCE,
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    RC_INVALID_TEMPLATE,
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    RC_PRIVATE_VIDEO,
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    RC_NOOP,
    RC_RIP,
    RC_SUCCESS
} returns;

typedef struct
{
    void *Location;
    void *Ptr;
    char *ID;
    int  Size;
} arena;

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typedef struct
{
    // Universal
    char  CacheDir[256];
    int   Edition;
    int   LogLevel;
    int   Mode;
    int   UpdateInterval;

    // Advisedly universal, although could be per-project
    char *RootDir; // Absolute
    char *RootURL;
    char *CSSDir; // Relative to Root{Dir,URL}
    char *ImagesDir; // Relative to Root{Dir,URL}
    char *JSDir; // Relative to Root{Dir,URL}

    // Per Project
    char *ProjectID;
    char *Theme;
    char *DefaultMedium;

    // Per Project - Input
    char *ProjectDir; // Absolute
    char *TemplatesDir; // Absolute
    char *TemplateIndexLocation; // Relative to TemplatesDir ???
    char *TemplatePlayerLocation; // Relative to TemplatesDir ???

    // Per Project - Output
    char *BaseDir; // Absolute
    char *BaseURL;
    char *IndexLocation; // Relative to Base{Dir,URL}
    char *PlayerLocation; // Relative to Base{Dir,URL}
    char *PlayerURLPrefix; /* NOTE(matt): This will become a full blown customisable output URL.
                                    For now it simply replaces the ProjectID */
    // Single Edition - Input
    char SingleHMMLFilePath[256];

    // Single Edition - Output
    char *OutLocation;
    char *OutIntegratedLocation;
} config;

// NOTE(matt): Globals
config Config = {};
arena MemoryArena;
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time_t LastPrivacyCheck;
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time_t LastQuoteFetch;
//

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typedef struct
{
    char *Location;
    char *Ptr;
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    char *ID;
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    int  Size;
} buffer;

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typedef struct
{
    buffer Buffer;
    FILE  *Handle;
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    char   Path[256]; // NOTE(matt): Could this just be a char *?
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    int    FileSize;
} file_buffer;

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// TODO(matt): Increment CINERA_DB_VERSION!
typedef struct
{
    // NOTE(matt): Consider augmenting this to contain such stuff as: "hex signature"
    unsigned int       CurrentDBVersion; // NOTE(matt): Put this first to aid reliability
    version            CurrentAppVersion;
    version            CurrentHMMLVersion;

    unsigned int       InitialDBVersion;
    version            InitialAppVersion;
    version            InitialHMMLVersion;

    unsigned short int EntryCount;
    char               ProjectID[MAX_PROJECT_ID_LENGTH + 1];
    char               ProjectName[MAX_PROJECT_NAME_LENGTH + 1];
    char               BaseURL[MAX_BASE_URL_LENGTH + 1];
    char               IndexLocation[MAX_RELATIVE_PAGE_LOCATION_LENGTH + 1];
    char               PlayerLocation[MAX_RELATIVE_PAGE_LOCATION_LENGTH + 1];
    char               PlayerURLPrefix[MAX_PLAYER_URL_PREFIX_LENGTH + 1];
} index_header;

typedef struct
{
    unsigned int       PrevStart, NextStart;
    unsigned short int PrevEnd, NextEnd;
} link_insertion_offsets; // NOTE(matt): Relative

typedef struct
{
    link_insertion_offsets  LinkOffsets;
    unsigned short int      Size;
    char                    BaseFilename[MAX_BASE_FILENAME_LENGTH + 1];
    char                    Title[MAX_TITLE_LENGTH + 1];
} index_metadata;

typedef struct
{
    file_buffer File;
    file_buffer Metadata;
    index_header Header;
    index_metadata Entry;
} index;
// TODO(matt): Increment CINERA_DB_VERSION!

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typedef struct
{
    buffer IncludesIndex;
    buffer Search;
    buffer Index; // NOTE(matt): This buffer is malloc'd separately, rather than claimed from the memory_arena
    buffer IncludesPlayer;
    buffer Menus;
    buffer Player;
    buffer ScriptPlayer;
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    char Custom0[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom1[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom2[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom3[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom4[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom5[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom6[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom7[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom8[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom9[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom10[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom11[MAX_CUSTOM_SNIPPET_SHORT_LENGTH + 1];
    char Custom12[MAX_CUSTOM_SNIPPET_LONG_LENGTH + 1];
    char Custom13[MAX_CUSTOM_SNIPPET_LONG_LENGTH + 1];
    char Custom14[MAX_CUSTOM_SNIPPET_LONG_LENGTH + 1];
    char Custom15[MAX_CUSTOM_SNIPPET_LONG_LENGTH + 1];

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    char ProjectName[MAX_PROJECT_NAME_LENGTH + 1];
    char Title[MAX_TITLE_LENGTH + 1];
    char URLIndex[MAX_BASE_URL_LENGTH + 1 + MAX_RELATIVE_PAGE_LOCATION_LENGTH + 1];
    char URLPlayer[MAX_BASE_URL_LENGTH + 1 + MAX_RELATIVE_PAGE_LOCATION_LENGTH + 1 + MAX_PLAYER_URL_PREFIX_LENGTH + MAX_BASE_FILENAME_LENGTH + 1];
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    char VideoID[16];
} buffers;

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enum
{
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    // Contents and Player Pages Mandatory
    TAG_INCLUDES,

    // Contents Page Mandatory
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    TAG_INDEX,

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    // Player Page Mandatory
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    TAG_MENUS,
    TAG_PLAYER,
    TAG_SCRIPT,

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    // Player Page Optional
    TAG_CUSTOM0,
    TAG_CUSTOM1,
    TAG_CUSTOM2,
    TAG_CUSTOM3,
    TAG_CUSTOM4,
    TAG_CUSTOM5,
    TAG_CUSTOM6,
    TAG_CUSTOM7,
    TAG_CUSTOM8,
    TAG_CUSTOM9,
    TAG_CUSTOM10,
    TAG_CUSTOM11,

    TAG_CUSTOM12,
    TAG_CUSTOM13,
    TAG_CUSTOM14,
    TAG_CUSTOM15,

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    TAG_TITLE,
    TAG_VIDEO_ID,
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    // Anywhere Optional
    TAG_PROJECT,
    TAG_URL,
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} template_tags;

typedef struct
{
    int Code; // template_tags
    char *Tag;
} tag;

tag Tags[] = {
    { TAG_INCLUDES, "__CINERA_INCLUDES__" },
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    { TAG_INDEX,    "__CINERA_INDEX__" },

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    { TAG_MENUS,    "__CINERA_MENUS__" },
    { TAG_PLAYER,   "__CINERA_PLAYER__" },
    { TAG_SCRIPT,   "__CINERA_SCRIPT__" },
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    { TAG_CUSTOM0,  "__CINERA_CUSTOM0__" },
    { TAG_CUSTOM1,  "__CINERA_CUSTOM1__" },
    { TAG_CUSTOM2,  "__CINERA_CUSTOM2__" },
    { TAG_CUSTOM3,  "__CINERA_CUSTOM3__" },
    { TAG_CUSTOM4,  "__CINERA_CUSTOM4__" },
    { TAG_CUSTOM5,  "__CINERA_CUSTOM5__" },
    { TAG_CUSTOM6,  "__CINERA_CUSTOM6__" },
    { TAG_CUSTOM7,  "__CINERA_CUSTOM7__" },
    { TAG_CUSTOM8,  "__CINERA_CUSTOM8__" },
    { TAG_CUSTOM9,  "__CINERA_CUSTOM9__" },
    { TAG_CUSTOM10,  "__CINERA_CUSTOM10__" },
    { TAG_CUSTOM11,  "__CINERA_CUSTOM11__" },

    { TAG_CUSTOM12,  "__CINERA_CUSTOM12__" },
    { TAG_CUSTOM13,  "__CINERA_CUSTOM13__" },
    { TAG_CUSTOM14,  "__CINERA_CUSTOM14__" },
    { TAG_CUSTOM15,  "__CINERA_CUSTOM15__" },

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    { TAG_TITLE,    "__CINERA_TITLE__" },
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    { TAG_VIDEO_ID, "__CINERA_VIDEO_ID__" },
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    { TAG_PROJECT,  "__CINERA_PROJECT__" },
    { TAG_URL,      "__CINERA_URL__" },
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};

typedef struct
{
    int Offset;
    int TagCode;
} tag_offset;

typedef struct
{
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    char Filename[256];
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    tag_offset Tag[16];
    int Validity; // NOTE(matt): Bitmask describing which page the template is valid for, i.e. contents and / or player page
    int TagCount;
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} template_metadata;

typedef struct
{
    template_metadata Metadata;
    buffer Buffer;
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} template;

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// TODO(matt): Consider putting the ref_info and quote_info into linked lists on the heap, just to avoid all the hardcoded sizes

typedef struct
{
    char Date[32];
    char Text[512];
} quote_info;

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typedef struct
{
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    char Timecode[8];
    int Identifier;
} identifier;

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#define REF_MAX_IDENTIFIER 64
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typedef struct
{
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    char RefTitle[620];
    char ID[512];
    char URL[512];
    char Source[256];
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    identifier Identifier[REF_MAX_IDENTIFIER];
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    int IdentifierCount;
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} ref_info;

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typedef struct
{
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    char Marker[32];
    char WrittenText[32];
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} category_info;
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typedef struct
{
    category_info Category[64];
    int Count;
} categories;

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// TODO(matt): Parse this stuff out of a config file
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typedef struct
{
    char *Username;
    char *CreditedName;
    char *HomepageURL;
    char *SupportIcon;
    char *SupportURL;
} credential_info;

credential_info Credentials[] =
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{
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    { "/a_waterman", "Andrew Waterman", "https://www.linkedin.com/in/andrew-waterman-76805788", "", ""},
    { "/y_lee", "Yunsup Lee", "https://www.linkedin.com/in/yunsup-lee-385b692b/", "", ""},
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    { "AndrewJDR", "Andrew Johnson", "", "", ""},
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    { "AsafGartner", "Asaf Gartner", "", "", ""},
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    { "BretHudson", "Bret Hudson", "http://www.brethudson.com/", "cinera_sprite_patreon.png", "https://www.patreon.com/indieFunction"},
    { "ChronalDragon", "Andrew Chronister", "http://chronal.net/", "", ""},
    { "Kelimion", "Jeroen van Rijn", "https://handmade.network/home", "", ""},
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    { "Mannilie", "Emmanuel Vaccaro", "http://emmanuelvaccaro.com/", "", ""},
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    { "Miblo", "Matt Mascarenhas", "https://miblodelcarpio.co.uk/", "cinera_sprite_sendowl.png", "https://miblodelcarpio.co.uk/cinera#pledge"},
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    { "Mr4thDimention", "Allen Webster", "http://www.4coder.net/", "", ""},
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    { "Pseudonym73", "Andrew Bromage", "https://twitter.com/deguerre", "", ""},
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    { "Quel_Solaar", "Eskil Steenberg", "http://quelsolaar.com/", "", ""},
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    { "ZedZull", "Jay Waggle", "", "", ""},
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    { "abnercoimbre", "Abner Coimbre", "https://handmade.network/m/abnercoimbre", "", ""},
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    { "brianwill", "Brian Will", "http://brianwill.net/blog/", "", ""},
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    { "cbloom", "Charles Bloom", "http://cbloomrants.blogspot.co.uk/", "", ""},
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    { "cmuratori", "Casey Muratori", "https://handmadehero.org", "cinera_sprite_sendowl.png", "https://handmadehero.org/patreon.html"},
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    { "csnover", "Colin Snover", "https://zetafleet.com/", "", ""},
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    { "debiatan", "Miguel Lechón", "http://blog.debiatan.net/", "", ""},
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    { "dspecht", "Dustin Specht", "", "", ""},
    { "effect0r", "Cory Henderlite", "", "", ""},
    { "ffsjs", "ffsjs", "", "", ""},
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    { "fierydrake", "Mike Tunnicliffe", "", "", ""},
    { "garlandobloom", "Matthew VanDevander", "https://lowtideproductions.com/", "cinera_sprite_patreon.png", "https://www.patreon.com/mv"},
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    { "ikerms", "Iker Murga", "", "", ""},
    { "insofaras", "Alex Baines", "https://abaines.me.uk/", "", ""},
    { "jacebennett", "Jace Bennett", "", "", ""},
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    { "jon", "Jonathan Blow", "http://the-witness.net/news/", "", ""},
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    { "jpike", "Jacob Pike", "", "", ""},
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    { "martincohen", "Martin Cohen", "http://blog.coh.io/", "", ""},
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    { "miotatsu", "Mio Iwakura", "http://riscy.tv/", "cinera_sprite_patreon.png", "https://patreon.com/miotatsu"},
    { "nothings", "Sean Barrett", "https://nothings.org/", "", ""},
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    { "pervognsen", "Per Vognsen", "https://github.com/pervognsen/bitwise/", "", ""},
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    { "philipbuuck", "Philip Buuck", "http://philipbuuck.com/", "", ""},
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    { "powerc9000", "Clay Murray", "http://claymurray.website/", "", ""},
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    { "rygorous", "Fabian Giesen", "https://fgiesen.wordpress.com/", "", ""},
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    { "schme", "Kasper Sauramo", "", "", ""},
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    { "sssmcgrath", "Shawn McGrath", "http://www.dyadgame.com/", "", ""},
    { "thehappiecat", "Anne", "https://www.youtube.com/c/TheHappieCat", "cinera_sprite_patreon.png", "https://www.patreon.com/thehappiecat"},
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    { "theinternetftw", "Ben Craddock", "", "", ""},
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    { "wheatdog", "Tim Liou", "http://stringbulbs.com/", "", ""},
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    { "williamchyr", "William Chyr", "http://williamchyr.com/", "", ""},
    { "wonchun", "Won Chun", "https://twitter.com/won3d", "", ""},
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};

typedef struct
{
    char *Medium;
    char *Icon;
    char *WrittenName;
} category_medium;

category_medium CategoryMedium[] =
{
    // medium        icon         written name
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    { "admin",       "&#128505;", "Administrivia"},
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    { "afk",         "&#8230;"  , "Away from Keyboard"},
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    { "authored",    "&#128490;", "Chat Comment"}, // TODO(matt): Conditionally handle Chat vs Guest Comments
    { "blackboard",  "&#128396;", "Blackboard"},
    { "experience",  "&#127863;", "Experience"},
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    { "hat",         "&#127913;", "Hat"},
    { "multimedia",  "&#127916;", "Media Clip"},
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    { "owl",         "&#129417;", "Owl of Shame"},
    { "programming", "&#128430;", "Programming"}, // TODO(matt): Potentially make this configurable per project
    { "rant",        "&#128162;", "Rant"},
    { "research",    "&#128214;", "Research"},
    { "run",         "&#127939;", "In-Game"}, // TODO(matt): Potentially make this configurable per project
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    { "speech",      "&#128489;", "Speech"},
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    { "trivia",      "&#127922;", "Trivia"},
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};

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enum
{
    NS_CALENDRICAL,
    NS_LINEAR,
    NS_SEASONAL,
} numbering_schemes;

typedef struct
{
    char *ProjectID;
    char *FullName;
    char *Unit; // e.g. Day, Episode, Session
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    int NumberingScheme; // numbering_schemes
    char *Medium;
    char *AltURLPrefix; // NOTE(matt): This currently just straight up replaces the ProjectID in the player pages' output directories
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} project_info;

project_info ProjectInfo[] =
{
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    { "bitwise", "Bitwise", "Day", NS_LINEAR, "programming", "" },

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    { "book",  "Book Club",      "Day", NS_LINEAR, "research",    "" },
    { "pcalc", "pcalc",          "Day", NS_LINEAR, "programming", "" },
    { "riscy", "RISCY BUSINESS", "Day", NS_LINEAR, "programming", "" },
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    { "chat",       "Handmade Chat",         "Day", NS_LINEAR, "speech",      "" },
    { "code",       "Handmade Hero",         "Day", NS_LINEAR, "programming", "day" },
    { "intro-to-c", "Intro to C on Windows", "Day", NS_LINEAR, "programming", "day" },
    { "misc",       "Handmade Miscellany",   "",    NS_LINEAR, "admin",       "" },
    { "ray",        "Handmade Ray",          "Day", NS_LINEAR, "programming", "" },
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    { "hmdshow", "HandmadeDev Show",   "", NS_SEASONAL, "speech",      "ep" },
    { "lecture", "Abner Talks",        "", NS_SEASONAL, "speech",      "" },
    { "stream",  "Abner Programs",     "", NS_SEASONAL, "programming", "" },
    { "special", "Abner Show Special", "", NS_SEASONAL, "programming", "" },
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    { "obbg", "Open Block Building Game", "Episode", NS_LINEAR, "programming", "" },
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    { "sysadmin", "SysAdmin", "Session", NS_LINEAR, "admin", "" },
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};

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#define ArrayCount(A) sizeof(A)/sizeof(*(A))

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__attribute__ ((format (printf, 2, 3)))
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int
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CopyString(char Dest[], char *Format, ...)
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{
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    int Length = 0;
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    va_list Args;
    va_start(Args, Format);
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    Length = vsprintf(Dest, Format, Args);
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    va_end(Args);
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    return Length;
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}

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int
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StringLength(char *String)
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{
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    int i = 0;
    while(String[i])
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    {
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        ++i;
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    }
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    return i;
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}

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void
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CopyBuffer(buffer *Dest, buffer *Src)
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{
    Src->Ptr = Src->Location;
    while(*Src->Ptr)
    {
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        // TODO(matt)
        {
            if(Dest->Ptr - Dest->Location >= Dest->Size)
            {
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                fprintf(stderr, "CopyBuffer: %s cannot accommodate %s\n", Dest->ID, Src->ID);
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                __asm__("int3");
            }
        }
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        *Dest->Ptr++ = *Src->Ptr++;
    }
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    *Dest->Ptr = '\0';
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}

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void
Clear(char *String, int Size)
{
    for(int i = 0; i < Size; ++i)
    {
        String[i] = 0;
    }
}

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int
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CopyStringNoFormat(char *Dest, char *String)
{
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    int Length = 0;
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    while(*String)
    {
        *Dest++ = *String++;
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        ++Length;
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    }
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    *Dest = '\0';
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    return Length;
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}

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int
ClearCopyStringNoFormat(char *Dest, int DestSize, char *String)
{
    Clear(Dest, DestSize);
    return(CopyStringNoFormat(Dest, String));
}

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// TODO(matt): Maybe do a version of this that takes a string as a Terminator
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int
CopyStringNoFormatT(char *Dest, char *String, char Terminator)
{
    int Length = 0;
    while(*String != Terminator)
    {
        *Dest++ = *String++;
        ++Length;
    }
    *Dest = '\0';
    return Length;
}

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__attribute__ ((format (printf, 2, 3)))
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void
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CopyStringToBuffer(buffer *Dest, char *Format, ...)
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{
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    va_list Args;
    va_start(Args, Format);
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    int Length = vsnprintf(Dest->Ptr, Dest->Size - (Dest->Ptr - Dest->Location), Format, Args);
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    va_end(Args);
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    // TODO(matt)
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    {
        if(Length + (Dest->Ptr - Dest->Location) >= Dest->Size)
        {
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            fprintf(stderr, "CopyStringToBuffer: %s cannot accommodate %d-character string:\n"
                    "\n"
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                    "%s\n", Dest->ID, Length, Format);
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            __asm__("int3");
        }
    }
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    Dest->Ptr += Length;
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}

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void
CopyStringToBufferNoFormat(buffer *Dest, char *String)
{
    while(*String)
    {
        *Dest->Ptr++ = *String++;
    }
    *Dest->Ptr = '\0';
}

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void
CopyStringToBufferHTMLSafe(buffer *Dest, char *String)
{
    while(*String)
    {
        if(Dest->Ptr - Dest->Location >= Dest->Size)
        {
            fprintf(stderr, "CopyStringToBufferHTMLSafe: %s cannot accommodate %d-character string\n", Dest->ID, StringLength(String));
            __asm__("int3");
        }
        switch(*String)
        {
            case '<':
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            CopyStringToBuffer(Dest, "&lt;");
            String++;
            break;
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            case '>':
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            CopyStringToBuffer(Dest, "&gt;");
            String++;
            break;
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            case '&':
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            CopyStringToBuffer(Dest, "&amp;");
            String++;
            break;
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            case '\"':
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            CopyStringToBuffer(Dest, "&quot;");
            String++;
            break;
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            case '\'':
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            CopyStringToBuffer(Dest, "&#39;");
            String++;
            break;
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            default:
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            *Dest->Ptr++ = *String++;
            break;
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        }
    }
}

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void
CopyStringToBufferJSONSafe(buffer *Dest, char *String)
{
    while(*String)
    {
        if(Dest->Ptr - Dest->Location >= Dest->Size)
        {
            fprintf(stderr, "CopyStringToBufferHTMLSafe: %s cannot accommodate %d-character string\n", Dest->ID, StringLength(String));
            __asm__("int3");
        }
        switch(*String)
        {
            case '\\':
            case '\"':
                *Dest->Ptr++ = '\\';
            default:
                *Dest->Ptr++ = *String++;
                break;
        }
    }
}

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int
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StringsDiffer(char *A, char *B) // NOTE(matt): Two null-terminated strings
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{
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    while(*A && *B && *A == *B)
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    {
        ++A, ++B;
    }
    return *A - *B;
}

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bool
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StringsDifferT(char *A, // NOTE(matt): Null-terminated string
               char *B, // NOTE(matt): Not null-terminated string (e.g. one mid-buffer)
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               char Terminator // NOTE(matt): Caller definable terminator. Pass 0 to only match on the extent of A
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               )
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{
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    int ALength = StringLength(A);
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    int i = 0;
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    while(i < ALength && A[i] && A[i] == B[i])
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    {
        ++i;
    }
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    if((!Terminator && !A[i] && ALength == i) ||
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       (!A[i] && ALength == i && (B[i] == Terminator)))
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    {
        return FALSE;
    }
    else
    {
        return TRUE;
    }
}

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int
MakeDir(char *Path)
{
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    // TODO(matt): Correctly check for permissions
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    int i = StringLength(Path);
    int Ancestors = 0;
    while(mkdir(Path, 00755) == -1)
    {
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        if(errno == EACCES)
        {
            return RC_ERROR_DIRECTORY;
        }
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        while(Path[i] != '/' && i > 0)
        {
            --i;
        }
        ++Ancestors;
        Path[i] = '\0';
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        if(i == 0) { return RC_ERROR_DIRECTORY; }
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    }
    while(Ancestors > 0)
    {
        while(Path[i] != '\0')
        {
            ++i;
        }
        Path[i] = '/';
        --Ancestors;
        if((mkdir(Path, 00755)) == -1)
        {
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            return RC_ERROR_DIRECTORY;
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        }
    }
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    return RC_SUCCESS;
}

void
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LogUsage(buffer *Buffer)
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{
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#if DEBUG
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    char LogPath[256];
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    CopyString(LogPath, "%s/%s", Config.CacheDir, "buffers.log");
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    FILE *LogFile;
    if(!(LogFile = fopen(LogPath, "a+")))
    {
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        MakeDir(Config.CacheDir);
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        if(!(LogFile = fopen(LogPath, "a+")))
        {
            perror("LogUsage");
            return;
        }
    }

    fprintf(LogFile, "%s,%ld,%d\n",
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            Buffer->ID,
            Buffer->Ptr - Buffer->Location,
            Buffer->Size);
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    fclose(LogFile);
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#endif
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}

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__attribute__ ((format (printf, 2, 3)))
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void
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LogError(int LogLevel, char *Format, ...)
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{
    if(Config.LogLevel >= LogLevel)
    {
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        char LogPath[256];
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        CopyString(LogPath, "%s/%s", Config.CacheDir, "errors.log");
        FILE *LogFile;
        if(!(LogFile = fopen(LogPath, "a+")))
        {
            MakeDir(Config.CacheDir);
            if(!(LogFile = fopen(LogPath, "a+")))
            {
                perror("LogUsage");
                return;
            }
        }

        va_list Args;
        va_start(Args, Format);
        vfprintf(LogFile, Format, Args);
        va_end(Args);
        // TODO(matt): Include the LogLevel "string" and the current wall time
        fprintf(LogFile, "\n");
        fclose(LogFile);
    }
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}

void
FreeBuffer(buffer *Buffer)
{
    free(Buffer->Location);
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    Buffer->Location = '\0';
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#if DEBUG_MEM
    FILE *MemLog = fopen("/home/matt/cinera_mem", "a+");
    fprintf(MemLog, "     Freed %s\n", Buffer->ID);
    fclose(MemLog);
    printf("     Freed %s\n", Buffer->ID);
#endif
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}

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#if 0
#define ClaimBuffer(MemoryArena, Buffer, ID, Size) if(__ClaimBuffer(MemoryArena, Buffer, ID, Size))\
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{\
    fprintf(stderr, "%s:%d: MemoryArena cannot contain %s of size %d\n", __FILE__, __LINE__, ID, Size);\
    hmml_free(&HMML);\
    FreeBuffer(MemoryArena);\
    return 1;\
};
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#endif
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int
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ClaimBuffer(buffer *Buffer, char *ID, int Size)
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{
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    if(MemoryArena.Ptr - MemoryArena.Location + Size > MemoryArena.Size)
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    {
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        return RC_ARENA_FULL;
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    }
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    Buffer->Location = (char *)MemoryArena.Ptr;
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    Buffer->Size = Size;
    Buffer->ID = ID;
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    MemoryArena.Ptr += Buffer->Size;
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    *Buffer->Location = '\0';
    Buffer->Ptr = Buffer->Location;
#if DEBUG
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    float PercentageUsed = (float)(MemoryArena.Ptr - MemoryArena.Location) / MemoryArena.Size * 100;
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    printf("  ClaimBuffer(%s): %d\n"
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           "    Total ClaimedMemory: %ld (%.2f%%, leaving %ld free)\n\n", Buffer->ID, Buffer->Size, MemoryArena.Ptr - MemoryArena.Location, PercentageUsed, MemoryArena.Size - (MemoryArena.Ptr - MemoryArena.Location));
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#endif
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    return RC_SUCCESS;
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}

void
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DeclaimBuffer(buffer *Buffer)
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{
    *Buffer->Location = '\0';
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    MemoryArena.Ptr -= Buffer->Size;
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    float PercentageUsed = (float)(Buffer->Ptr - Buffer->Location) / Buffer->Size * 100;
#if DEBUG
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    printf("DeclaimBuffer(%s)\n"
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           "    Used: %ld / %d (%.2f%%)\n"
           "\n"
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           "    Total ClaimedMemory: %ld\n\n",
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           Buffer->ID,
           Buffer->Ptr - Buffer->Location,
           Buffer->Size,
           PercentageUsed,
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           MemoryArena.Ptr - MemoryArena.Location);
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#endif
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    LogUsage(Buffer);
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    if(PercentageUsed >= 95.0f)
    {
        // TODO(matt): Implement either dynamically growing buffers, or phoning home to [email protected]
        LogError(LOG_ERROR, "%s used %.2f%% of its allotted memory\n", Buffer->ID, PercentageUsed);
        fprintf(stderr, "\e[1;31mWarning\e[0m: %s used %.2f%% of its allotted memory\n", Buffer->ID, PercentageUsed);
    }
    else if(PercentageUsed >= 80.0f)
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    {
        // TODO(matt): Implement either dynamically growing buffers, or phoning home to [email protected]
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        LogError(LOG_ERROR, "%s used %.2f%% of its allotted memory\n", Buffer->ID, PercentageUsed);
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        fprintf(stderr, "\e[0;33mWarning\e[0m: %s used %.2f%% of its allotted memory\n", Buffer->ID, PercentageUsed);
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    }
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    Buffer->Size = 0;
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}

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void RewindBuffer(buffer *Buffer)
{
#if DEBUG
    float PercentageUsed = (float)(Buffer->Ptr - Buffer->Location) / Buffer->Size * 100;
    printf("Rewinding %s\n"
                    "    Used: %ld / %d (%.2f%%)\n\n",
                    Buffer->ID,
                    Buffer->Ptr - Buffer->Location,
                    Buffer->Size,
                    PercentageUsed);
#endif
    Buffer->Ptr = Buffer->Location;
}

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enum
{
    TEMPLATE_INDEX,
    TEMPLATE_PLAYER,
    TEMPLATE_BESPOKE
} templates;

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char *
GetDirectoryPath(char *Filepath)
{
    char *Ptr = Filepath + StringLength(Filepath) - 1;
    while(Ptr > Filepath && *Ptr != '/')
    {
        --Ptr;
    }
    if(Ptr == Filepath)
    {
        *Ptr++ = '.';
    }
    *Ptr = '\0';
    return Filepath;
}

char *
GetBaseFilename(char *Filepath,
        char *Extension // Including the "."
                        // Pass 0 to retain the whole file path, only without its parent directories
        )
{
    char *BaseFilename = Filepath + StringLength(Filepath) - 1;
    while(BaseFilename > Filepath && *BaseFilename != '/')
    {
        --BaseFilename;
    }
    if(*BaseFilename == '/')
    {
        ++BaseFilename;
    }
    BaseFilename[StringLength(BaseFilename) - StringLength(Extension)] = '\0';
    return BaseFilename;
}

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void
ConstructTemplatePath(template *Template, int TemplateType)
{
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    // NOTE(matt): Bespoke template paths are set relative to:
    //                  in Project Edition: ProjectDir
    //                  in Single  Edition: Parent directory of .hmml file

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    if(Template->Metadata.Filename[0] != '/')
    {
        char Temp[256];
        CopyString(Temp, Template->Metadata.Filename);
        char *Ptr = Template->Metadata.Filename;
        if(TemplateType == TEMPLATE_BESPOKE)
        {
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            if(Config.Edition == EDITION_SINGLE)
            {
                Ptr += CopyString(Ptr, "%s/", GetDirectoryPath(Config.SingleHMMLFilePath));
            }
            else
            {
                Ptr += CopyString(Ptr, "%s/", Config.ProjectDir);
            }
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        }
        else
        {
            Ptr += CopyString(Ptr, "%s/", Config.TemplatesDir);
        }
        CopyString(Ptr, "%s", Temp);
    }
}

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int
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InitTemplate(template **Template)
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{
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    if(MemoryArena.Ptr - MemoryArena.Location + sizeof(template) > MemoryArena.Size)
    {
        return RC_ARENA_FULL;
    }
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    *Template = (template *)MemoryArena.Ptr;
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    Clear((*Template)->Metadata.Filename, 256); // NOTE(matt): template_metadata specifies Filename[256]
    (*Template)->Metadata.Validity = 0;
    (*Template)->Metadata.TagCount = 0;
    for(int i = 0; i < 16; ++i) // NOTE(matt): template_metadata specifies Tag[16]
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    {
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        (*Template)->Metadata.Tag[i].Offset = 0;
        (*Template)->Metadata.Tag[i].TagCode = 0;
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    }
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    MemoryArena.Ptr += sizeof(template);
    return RC_SUCCESS;
}

int
ClaimTemplate(template **Template, char *Location, int TemplateType)
{
    CopyString((*Template)->Metadata.Filename, Location);
    ConstructTemplatePath((*Template), TemplateType);

    if(TemplateType == TEMPLATE_BESPOKE)
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    {
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        fprintf(stderr, "\e[0;35mPacking\e[0m template: %s\n", (*Template)->Metadata.Filename);
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    }
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    FILE *File;
    if(!(File = fopen((*Template)->Metadata.Filename, "r")))
    {
        LogError(LOG_ERROR, "Unable to open template %s: %s", (*Template)->Metadata.Filename, strerror(errno));
        fprintf(stderr, "Unable to open template %s: %s\n", (*Template)->Metadata.Filename, strerror(errno));
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        Clear((*Template)->Metadata.Filename, 256); // NOTE(matt): template_metadata specifies Filename[256]
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        return RC_ERROR_FILE;
    }
    fseek(File, 0, SEEK_END);
    (*Template)->Buffer.Size = ftell(File);
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    if(MemoryArena.Ptr - MemoryArena.Location + (*Template)->Buffer.Size > MemoryArena.Size)
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    {
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        Clear((*Template)->Metadata.Filename, 256); // NOTE(matt): template_metadata specifies Filename[256]
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        return RC_ARENA_FULL;
    }
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    (*Template)->Buffer.Location = MemoryArena.Ptr;
    (*Template)->Buffer.Ptr = (*Template)->Buffer.Location;
    (*Template)->Buffer.ID = (*Template)->Metadata.Filename;
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    fseek(File, 0, SEEK_SET);
    fread((*Template)->Buffer.Location, (*Template)->Buffer.Size, 1, File);
    fclose(File);

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    MemoryArena.Ptr += (*Template)->Buffer.Size;

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#if DEBUG
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    printf("  ClaimTemplate(%s): %d\n"
           "    Total ClaimedMemory: %ld\n\n", (*Template)->Metadata.Filename, (*Template)->Buffer.Size, MemoryArena.Ptr - MemoryArena.Location);
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#endif
    return RC_SUCCESS;
}

int
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DeclaimTemplate(template *Template)
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{
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    Clear(Template->Metadata.Filename, 256);
    Template->Metadata.Validity = 0;
    for(int i = 0; i < Template->Metadata.TagCount; ++i)
    {
        Template->Metadata.Tag[i].Offset = 0;
        Template->Metadata.Tag[i].TagCode = 0;
    }
    Template->Metadata.TagCount = 0;
    MemoryArena.Ptr -= (*Template).Buffer.Size;

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#if DEBUG
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    printf("DeclaimTemplate(%s)\n"
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           "    Total ClaimedMemory: %ld\n\n",
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           (*Template).Metadata.Filename,
           MemoryArena.Ptr - MemoryArena.Location);
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#endif
    return RC_SUCCESS;
}

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int
TimecodeToSeconds(char *Timecode)
{
    int HMS[3] = { 0, 0, 0 }; // 0 == Seconds; 1 == Minutes; 2 == Hours
    int Colons = 0;
    while(*Timecode)
    {
        //if((*Timecode < '0' || *Timecode > '9') && *Timecode != ':') { return FALSE; }

        if(*Timecode == ':')
        {
            ++Colons;
            //if(Colons > 2) { return FALSE; }
            for(int i = 0; i < Colons; ++i)
            {
                HMS[Colons - i] = HMS[Colons - (i + 1)];
            }
            HMS[0] = 0;
        }
        else
        {
            HMS[0] = HMS[0] * 10 + *Timecode - '0';
        }

        ++Timecode;
    }

    //if(HMS[0] > 59 || HMS[1] > 59 || Timecode[-1] == ':') { return FALSE; }

    return HMS[2] * 60 * 60 + HMS[1] * 60 + HMS[0];
}

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typedef struct
{
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    unsigned int Hue:16;
    unsigned int Saturation:8;
    unsigned int Lightness:8;
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} hsl_colour;

hsl_colour
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CharToColour(char Char)
{
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    hsl_colour Colour;
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    if(Char >= 'a' && Char <= 'z')
    {
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        Colour.Hue = (((float)Char - 'a') / ('z' - 'a') * 360);
        Colour.Saturation = (((float)Char - 'a') / ('z' - 'a') * 26 + 74);
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    }
    else if(Char >= 'A' && Char <= 'Z')
    {
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        Colour.Hue = (((float)Char - 'A') / ('Z' - 'A') * 360);
        Colour.Saturation = (((float)Char - 'A') / ('Z' - 'A') * 26 + 74);
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    }
    else if(Char >= '0' && Char <= '9')
    {
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        Colour.Hue = (((float)Char - '0') / ('9' - '0') * 360);
        Colour.Saturation = (((float)Char - '0') / ('9' - '0') * 26 + 74);
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    }
    else
    {
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        Colour.Hue = 180;
        Colour.Saturation = 50;
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    }
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    return Colour;
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}

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hsl_colour *
StringToColourHash(hsl_colour *Colour, char *String)
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{
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    Colour->Hue = 0;
    Colour->Saturation = 0;
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    Colour->Lightness = 74;
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    int i;
    for(i = 0; String[i]; ++i)
    {
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        Colour->Hue += CharToColour(String[i]).Hue;
        Colour->Saturation += CharToColour(String[i]).Saturation;
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    }
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    Colour->Hue = Colour->Hue % 360;
    Colour->Saturation = Colour->Saturation % 26 + 74;
    return(Colour);
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}

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char *
SanitisePunctuation(char *String)
{
    char *Ptr = String;
    while(*Ptr)
    {
        if(*Ptr == ' ')
        {
            *Ptr = '_';
        }
        if((*Ptr < '0' || *Ptr > '9') &&
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           (*Ptr < 'a' || *Ptr > 'z') &&
           (*Ptr < 'A' || *Ptr > 'Z'))
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        {
            *Ptr = '-';
        }
        ++Ptr;
    }
    return String;
}

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enum
{
    INCLUDE_CSS,
    INCLUDE_Images,
    INCLUDE_JS,
} include_types;

enum
{
    PAGE_PLAYER = 1 << 0,
    PAGE_INDEX = 1 << 1
} pages;

void
ConstructURLPrefix(buffer *URLPrefix, int IncludeType, int PageType)
{
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    RewindBuffer(URLPrefix);
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    if(StringsDiffer(Config.RootURL, ""))
    {
        URLPrefix->Ptr += CopyString(URLPrefix->Ptr, "%s/", Config.RootURL);
    }
    else
    {
        if(Config.Edition == EDITION_PROJECT)
        {
            if(PageType == PAGE_PLAYER)
            {
                URLPrefix->Ptr += CopyString(URLPrefix->Ptr, "../");
            }
            URLPrefix->Ptr += CopyString(URLPrefix->Ptr, "../");
        }
    }

    switch(IncludeType)
    {
        case INCLUDE_CSS:
            if(StringsDiffer(Config.CSSDir, ""))
            {
                URLPrefix->Ptr += CopyString(URLPrefix->Ptr, "%s/", Config.CSSDir);
            }
            break;
        case INCLUDE_Images:
            if(StringsDiffer(Config.ImagesDir, ""))
            {
                URLPrefix->Ptr += CopyString(URLPrefix->Ptr, "%s/", Config.ImagesDir);
            }
            break;
        case INCLUDE_JS:
            if(StringsDiffer(Config.JSDir, ""))
            {
                URLPrefix->Ptr += CopyString(URLPrefix->Ptr, "%s/", Config.JSDir);
            }
            break;
    }
}

1245
enum
1246
{
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    CreditsError_NoHost,
    CreditsError_NoAnnotator,
    CreditsError_NoCredentials
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} credits_errors;
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int
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SearchCredentials(buffer *CreditsMenu, bool *HasCreditsMenu, char *Person, char *Role)
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{
    bool Found = FALSE;
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    for(int CredentialIndex = 0; CredentialIndex < ArrayCount(Credentials); ++CredentialIndex)
    {
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        if(!StringsDiffer(Person, Credentials[CredentialIndex].Username))
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        {
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            Found = TRUE;
            if(*HasCreditsMenu == FALSE)
            {
                CopyStringToBuffer(CreditsMenu,
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                        "            <div class=\"menu credits\">\n"
                        "                <div class=\"mouse_catcher\"></div>\n"
                        "                <span>Credits</span>\n"
                        "                <div class=\"credits_container\">\n");
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                *HasCreditsMenu = TRUE;
            }

            CopyStringToBuffer(CreditsMenu,
                    "                    <span class=\"credit\">\n");
            if(*Credentials[CredentialIndex].HomepageURL)
            {
                CopyStringToBuffer(CreditsMenu,
                        "                        <a class=\"person\" href=\"%s\" target=\"_blank\">\n"
                        "                            <div class=\"role\">%s</div>\n"
                        "                            <div class=\"name\">%s</div>\n"
                        "                        </a>\n",
                        Credentials[CredentialIndex].HomepageURL,
                        Role,
                        Credentials[CredentialIndex].CreditedName);
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            }
            else
            {
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                CopyStringToBuffer(CreditsMenu,
                        "                        <div class=\"person\">\n"
                        "                            <div class=\"role\">%s</div>\n"
                        "                            <div class=\"name\">%s</div>\n"
                        "                        </div>\n",
                        Role,
                        Credentials[CredentialIndex].CreditedName);
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            }
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            if(*Credentials[CredentialIndex].SupportIcon && *Credentials[CredentialIndex].SupportURL)
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            {
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                buffer URLPrefix;
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                ClaimBuffer(&URLPrefix, "URLPrefix", 1024);
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                ConstructURLPrefix(&URLPrefix, INCLUDE_Images, PAGE_PLAYER);
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                CopyStringToBuffer(CreditsMenu,
                        "                        <a class=\"support\" href=\"%s\" target=\"_blank\"><div class=\"support_icon\" style=\"background-image: url(%s%s);\"></div></a>\n",
                        Credentials[CredentialIndex].SupportURL,
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                        URLPrefix.Location,
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                        Credentials[CredentialIndex].SupportIcon);
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                DeclaimBuffer(&URLPrefix);
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            }
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            CopyStringToBuffer(CreditsMenu,
                    "                    </span>\n");
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        }
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    }
    return Found ? 0 : CreditsError_NoCredentials;
}
1315

1316
int
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BuildCredits(buffer *CreditsMenu, bool *HasCreditsMenu, HMML_VideoMetaData *Metadata)
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1318
// TODO(matt): Make this take the Credentials, once we are parsing them from a config
1319
{
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    if(Metadata->member)
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    {
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        if(SearchCredentials(CreditsMenu, HasCreditsMenu, Metadata->member, "Host"))
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        {
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            printf("No credentials for member %s. Please contact [email protected] with their:\n"
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                    "    Full name\n"
                    "    Homepage URL (optional)\n"
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                    "    Financial support info, e.g. Patreon URL (optional)\n", Metadata->member);
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            return CreditsError_NoCredentials;
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        }
    }
    else
    {
        if(*HasCreditsMenu == TRUE)
        {
            CopyStringToBuffer(CreditsMenu,
                    "                </div>\n"
                    "            </div>\n");
        }
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        fprintf(stderr, "Missing \"member\" in the [video] node\n");
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        return CreditsError_NoHost;
    }

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    if(Metadata->co_host_count > 0)
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    {
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        for(int i = 0; i < Metadata->co_host_count; ++i)
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        {
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            if(SearchCredentials(CreditsMenu, HasCreditsMenu, Metadata->co_hosts[i], "Co-host"))
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            {
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                printf("No credentials for co-host %s. Please contact [email protected] with their:\n"
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                        "    Full name\n"
                        "    Homepage URL (optional)\n"
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                        "    Financial support info, e.g. Patreon URL (optional)\n", Metadata->co_hosts[i]);
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                return CreditsError_NoCredentials;
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            }
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        }
    }
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    if(Metadata->guest_count > 0)
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    {
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        for(int i = 0; i < Metadata->guest_count; ++i)
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        {
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            if(SearchCredentials(CreditsMenu, HasCreditsMenu, Metadata->guests[i], "Guest"))
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            {
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                printf("No credentials for guest %s. Please contact [email protected] with their:\n"
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                        "    Full name\n"
                        "    Homepage URL (optional)\n"
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                        "    Financial support info, e.g. Patreon URL (optional)\n", Metadata->guests[i]);
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                return CreditsError_NoCredentials;
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            }
        }
    }
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    if(Metadata->annotator_count > 0)
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    {
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        for(int i = 0; i < Metadata->annotator_count; ++i)
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        {
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            if(SearchCredentials(CreditsMenu, HasCreditsMenu, Metadata->annotators[i], "Annotator"))
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            {
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                printf("No credentials for annotator %s. Please contact [email protected] with their:\n"
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                        "    Full name\n"
                        "    Homepage URL (optional)\n"
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                        "    Financial support info, e.g. Patreon URL (optional)\n", Metadata->annotators[i]);
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                return CreditsError_NoCredentials;
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            }
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        }
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    }
    else
    {
        if(*HasCreditsMenu == TRUE)
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        {
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            CopyStringToBuffer(CreditsMenu,
                    "                </div>\n"
                    "            </div>\n");
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        }
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        fprintf(stderr, "Missing \"annotator\" in the [video] node\n");
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        return CreditsError_NoAnnotator;
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    }
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    if(*HasCreditsMenu == TRUE)
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    {
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        CopyStringToBuffer(CreditsMenu,
                "                </div>\n"
                "            </div>\n");
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    }
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    return RC_SUCCESS;
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}

1409
int
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BuildReference(ref_info *ReferencesArray, int RefIdentifier, int UniqueRefs, HMML_Reference *Ref, HMML_Annotation *Anno)
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{
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#define REF_SITE (1 << 0)
#define REF_PAGE (1 << 1)
#define REF_URL (1 << 2)
#define REF_TITLE (1 << 3)
#define REF_ARTICLE (1 << 4)
#define REF_AUTHOR (1 << 5)
#define REF_EDITOR (1 << 6)
#define REF_PUBLISHER (1 << 7)
#define REF_ISBN (1 << 8)

    int Mask = 0;

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    if(Ref->site)      { Mask |= REF_SITE; }
    if(Ref->page)      { Mask |= REF_PAGE; }
    if(Ref