/* $Id: iptcutil.c,v 1.8 2011-05-08 00:44:18 fwarmerdam Exp $ */

#include "tif_config.h"

#include <stdio.h>

#include <stdlib.h>

#include <string.h>

#include <ctype.h>

#ifdef HAVE_STRINGS_H

# include <strings.h>

#endif

#ifdef HAVE_IO_H

# include <io.h>

#endif

#ifdef HAVE_FCNTL_H

# include <fcntl.h>

#endif

#ifdef WIN32

#define STRNICMP strnicmp

#else

#define STRNICMP strncasecmp

#endif

typedef struct _tag_spec

} tag_spec;

static tag_spec tags[] = {

{ 5,"Image Name" },

{ 7,"Edit Status" },

{ 10,"Priority" },

{ 15,"Category" },

{ 20,"Supplemental Category" },

{ 22,"Fixture Identifier" },

{ 25,"Keyword" },

{ 30,"Release Date" },

{ 35,"Release Time" },

{ 40,"Special Instructions" },

{ 45,"Reference Service" },

{ 47,"Reference Date" },

{ 50,"Reference Number" },

{ 55,"Created Date" },

{ 60,"Created Time" },

{ 65,"Originating Program" },

{ 70,"Program Version" },

{ 75,"Object Cycle" },

{ 80,"Byline" },

{ 85,"Byline Title" },

{ 90,"City" },

{ 95,"Province State" },

{ 100,"Country Code" },

{ 101,"Country" },

{ 103,"Original Transmission Reference" },

{ 105,"Headline" },

{ 110,"Credit" },

{ 115,"Source" },

{ 116,"Copyright String" },

{ 120,"Caption" },

{ 121,"Local Caption" },

{ 122,"Caption Writer" },

{ 200,"Custom Field 1" },

{ 201,"Custom Field 2" },

{ 202,"Custom Field 3" },

{ 203,"Custom Field 4" },

{ 204,"Custom Field 5" },

{ 205,"Custom Field 6" },

{ 206,"Custom Field 7" },

{ 207,"Custom Field 8" },

{ 208,"Custom Field 9" },

{ 209,"Custom Field 10" },

{ 210,"Custom Field 11" },

{ 211,"Custom Field 12" },

{ 212,"Custom Field 13" },

{ 213,"Custom Field 14" },

{ 214,"Custom Field 15" },

{ 215,"Custom Field 16" },

{ 216,"Custom Field 17" },

{ 217,"Custom Field 18" },

{ 218,"Custom Field 19" },

{ 219,"Custom Field 20" }

};

/*

* We format the output using HTML conventions

* to preserve control characters and such.

*/

void formatString(FILE *ofile, const char *s, int len)

{

putc('"', ofile);

for (; len > 0; --len, ++s) {

int c = *s;

switch (c) {

case '&':

fputs("&amp;", ofile);

break;

#ifdef HANDLE_GT_LT

case '<':

fputs("&lt;", ofile);

break;

case '>':

fputs("&gt;", ofile);

break;

#endif

case '"':

fputs("&quot;", ofile);

break;

default:

if (iscntrl(c))

fprintf(ofile, "&#%d;", c);

else

putc(*s, ofile);

break;

}

}

fputs("\"\n", ofile);

}

typedef struct _html_code

} html_code;

static html_code html_codes[] = {

#ifdef HANDLE_GT_LT

{ 4,"&lt;",'<' },

{ 4,"&gt;",'>' },

#endif

{ 5,"&amp;",'&' },

{ 6,"&quot;",'"' }

};

/*

* This routine converts HTML escape sequence

* back to the original ASCII representation.

* - returns the number of characters dropped.

*/

int convertHTMLcodes(char *s, int len)

{

if (len <=0 || s==(char*)NULL || *s=='\0')

return 0;

if (s[1] == '#')

{

int val, o;

if (sscanf(s,"&#%d;",&val) == 1)

{

o = 3;

while (s[o] != ';')

{

o++;

if (o > 5)

break;

}

if (o < 5)

strcpy(s+1, s+1+o);

*s = val;

return o;

}

}

else

{

int

i,

codes = sizeof(html_codes) / sizeof(html_code);

for (i=0; i < codes; i++)

{

if (html_codes[i].len <= len)

if (STRNICMP(s, html_codes[i].code, html_codes[i].len) == 0)

{

strcpy(s+1, s+html_codes[i].len);

*s = html_codes[i].val;

return html_codes[i].len-1;

}

}

}

return 0;

}

int formatIPTC(FILE *ifile, FILE *ofile)

{

unsigned int

foundiptc,

tagsfound;

unsigned char

recnum,

dataset;

char

*readable,

*str;

long

tagindx,

taglen;

int

i,

tagcount = sizeof(tags) / sizeof(tag_spec);

char

c;

foundiptc = 0; /* found the IPTC-Header */

tagsfound = 0; /* number of tags found */

c = getc(ifile);

while (c != EOF)

{

if (c == 0x1c)

foundiptc = 1;

else

{

if (foundiptc)

return -1;

else

continue;

}

/* we found the 0x1c tag and now grab the dataset and record number tags */

dataset = getc(ifile);

if ((char) dataset == EOF)

return -1;

recnum = getc(ifile);

if ((char) recnum == EOF)

return -1;

/* try to match this record to one of the ones in our named table */

for (i=0; i< tagcount; i++)

{

if (tags[i].id == recnum)

break;

}

if (i < tagcount)

readable = tags[i].name;

else

readable = "";

/* then we decode the length of the block that follows - long or short fmt */

c = getc(ifile);

if (c == EOF)

return 0;

if (c & (unsigned char) 0x80)

{

unsigned char

buffer[4];

for (i=0; i<4; i++)

{

c = buffer[i] = getc(ifile);

if (c == EOF)

return -1;

}

taglen = (((long) buffer[ 0 ]) << 24) |

(((long) buffer[ 1 ]) << 16) |

(((long) buffer[ 2 ]) << 8) |

(((long) buffer[ 3 ]));

}

else

{

unsigned char

x = c;

taglen = ((long) x) << 8;

x = getc(ifile);

if ((char)x == EOF)

return -1;

taglen |= (long) x;

}

/* make a buffer to hold the tag data and snag it from the input stream */

str = (char *) malloc((unsigned int) (taglen+1));

if (str == (char *) NULL)

{

printf("Memory allocation failed");

return 0;

}

for (tagindx=0; tagindx<taglen; tagindx++)

{

c = str[tagindx] = getc(ifile);

if (c == EOF)

{

free(str);

return -1;

}

}

str[ taglen ] = 0;

/* now finish up by formatting this binary data into ASCII equivalent */

if (strlen(readable) > 0)

fprintf(ofile, "%d#%d#%s=",(unsigned int)dataset, (unsigned int) recnum, readable);

else

fprintf(ofile, "%d#%d=",(unsigned int)dataset, (unsigned int) recnum);

formatString( ofile, str, taglen );

free(str);

tagsfound++;

c = getc(ifile);

}

return tagsfound;

}

int tokenizer(unsigned inflag,char *token,int tokmax,char *line,

char *white,char *brkchar,char *quote,char eschar,char *brkused,

int *next,char *quoted);

char *super_fgets(char *b, int *blen, FILE *file)

{

int

c,

len;

char

*q;

len=*blen;

for (q=b; ; q++)

{

c=fgetc(file);

if (c == EOF || c == '\n')

break;

if (((long)q - (long)b + 1 ) >= (long) len)

{

long

tlen;

tlen=(long)q-(long)b;

len<<=1;

b=(char *) realloc((char *) b,(len+2));

if ((char *) b == (char *) NULL)

break;

q=b+tlen;

}

*q=(unsigned char) c;

}

*blen=0;

if ((unsigned char *)b != (unsigned char *) NULL)

{

int

tlen;

tlen=(long)q - (long)b;

if (tlen == 0)

return (char *) NULL;

b[tlen] = '\0';

*blen=++tlen;

}

return b;

}

#define BUFFER_SZ 4096

int main(int argc, char *argv[])

{

unsigned int

length;

unsigned char

*buffer;

int

i,

mode; /* iptc binary, or iptc text */

FILE

*ifile = stdin,

*ofile = stdout;

char

c,

*usage = "usage: iptcutil -t | -b [-i file] [-o file] <input >output";

if( argc < 2 )

{

puts(usage);

return 1;

}

mode = 0;

length = -1;

buffer = (unsigned char *)NULL;

for (i=1; i<argc; i++)

{

c = argv[i][0];

if (c == '-' || c == '/')

{

c = argv[i][1];

switch( c )

{

case 't':

mode = 1;

#ifdef WIN32

/* Set "stdout" to binary mode: */

_setmode( _fileno( ofile ), _O_BINARY );

#endif

break;

case 'b':

mode = 0;

#ifdef WIN32

/* Set "stdin" to binary mode: */

_setmode( _fileno( ifile ), _O_BINARY );

#endif

break;

case 'i':

if (mode == 0)

ifile = fopen(argv[++i], "rb");

else

ifile = fopen(argv[++i], "rt");

if (ifile == (FILE *)NULL)

{

printf("Unable to open: %s\n", argv[i]);

return 1;

}

break;

case 'o':

if (mode == 0)

ofile = fopen(argv[++i], "wt");

else

ofile = fopen(argv[++i], "wb");

if (ofile == (FILE *)NULL)

{

printf("Unable to open: %s\n", argv[i]);

return 1;

}

break;

default:

printf("Unknown option: %s\n", argv[i]);

return 1;

}

}

else

{

puts(usage);

return 1;

}

}

if (mode == 0) /* handle binary iptc info */

formatIPTC(ifile, ofile);

if (mode == 1) /* handle text form of iptc info */

{

char

brkused,

quoted,

*line,

*token,

*newstr;

int

state,

next;

unsigned char

recnum = 0,

dataset = 0;

int

inputlen = BUFFER_SZ;

line = (char *) malloc(inputlen);

token = (char *)NULL;

while((line = super_fgets(line,&inputlen,ifile))!=NULL)

{

state=0;

next=0;

token = (char *) malloc(inputlen);

newstr = (char *) malloc(inputlen);

while(tokenizer(0, token, inputlen, line, "", "=", "\"", 0,

&brkused,&next,&quoted)==0)

{

if (state == 0)

{

int

state,

next;

char

brkused,

quoted;

state=0;

next=0;

while(tokenizer(0, newstr, inputlen, token, "", "#", "", 0,

&brkused, &next, &quoted)==0)

{

if (state == 0)

dataset = (unsigned char) atoi(newstr);

else

if (state == 1)

recnum = (unsigned char) atoi(newstr);

state++;

}

}

else

if (state == 1)

{

int

next;

unsigned long

len;

char

brkused,

quoted;

next=0;

len = strlen(token);

while(tokenizer(0, newstr, inputlen, token, "", "&", "", 0,

&brkused, &next, &quoted)==0)

{

if (brkused && next > 0)

{

char

*s = &token[next-1];

len -= convertHTMLcodes(s, strlen(s));

}

}

fputc(0x1c, ofile);

fputc(dataset, ofile);

fputc(recnum, ofile);

if (len < 0x10000)

{

fputc((len >> 8) & 255, ofile);

fputc(len & 255, ofile);

}

else

{

fputc(((len >> 24) & 255) | 0x80, ofile);

fputc((len >> 16) & 255, ofile);

fputc((len >> 8) & 255, ofile);

fputc(len & 255, ofile);

}

next=0;

while (len--)

fputc(token[next++], ofile);

}

state++;

}

free(token);

token = (char *)NULL;

free(newstr);

newstr = (char *)NULL;

}

free(line);

fclose( ifile );

fclose( ofile );

}

return 0;

}

/*

This routine is a generalized, finite state token parser. It allows

you extract tokens one at a time from a string of characters. The

characters used for white space, for break characters, and for quotes

can be specified. Also, characters in the string can be preceded by

a specifiable escape character which removes any special meaning the

character may have.

There are a lot of formal parameters in this subroutine call, but

once you get familiar with them, this routine is fairly easy to use.

"#define" macros can be used to generate simpler looking calls for

commonly used applications of this routine.

First, some terminology:

token: used here, a single unit of information in

the form of a group of characters.

white space: space that gets ignored (except within quotes

or when escaped), like blanks and tabs. in

addition, white space terminates a non-quoted

token.

break character: a character that separates non-quoted tokens.

commas are a common break character. the

usage of break characters to signal the end

of a token is the same as that of white space,

except multiple break characters with nothing

or only white space between generate a null

token for each two break characters together.

for example, if blank is set to be the white

space and comma is set to be the break

character, the line ...

A, B, C , , DEF

... consists of 5 tokens:

1) "A"

2) "B"

3) "C"

4) "" (the null string)

5) "DEF"

quote character: a character that, when surrounding a group

of other characters, causes the group of

characters to be treated as a single token,

no matter how many white spaces or break

characters exist in the group. also, a

token always terminates after the closing

quote. for example, if ' is the quote

character, blank is white space, and comma

is the break character, the following

string ...

A, ' B, CD'EF GHI

... consists of 4 tokens:

1) "A"

2) " B, CD" (note the blanks & comma)

3) "EF"

4) "GHI"

the quote characters themselves do

not appear in the resultant tokens. the

double quotes are delimiters i use here for

documentation purposes only.

escape character: a character which itself is ignored but

which causes the next character to be

used as is. ^ and \ are often used as

escape characters. an escape in the last

position of the string gets treated as a

"normal" (i.e., non-quote, non-white,

non-break, and non-escape) character.

for example, assume white space, break

character, and quote are the same as in the

above examples, and further, assume that

^ is the escape character. then, in the

string ...

ABC, ' DEF ^' GH' I ^ J K^ L ^

... there are 7 tokens:

1) "ABC"

2) " DEF ' GH"

3) "I"

4) " " (a lone blank)

5) "J"

6) "K L"

7) "^" (passed as is at end of line)

OK, now that you have this background, here's how to call "tokenizer":

result=tokenizer(flag,token,maxtok,string,white,break,quote,escape,

brkused,next,quoted)

result: 0 if we haven't reached EOS (end of string), and

1 if we have (this is an "int").

flag: right now, only the low order 3 bits are used.

1 => convert non-quoted tokens to upper case

2 => convert non-quoted tokens to lower case

0 => do not convert non-quoted tokens

(this is a "char").

token: a character string containing the returned next token

(this is a "char[]").

maxtok: the maximum size of "token". characters beyond

"maxtok" are truncated (this is an "int").

string: the string to be parsed (this is a "char[]").

white: a string of the valid white spaces. example:

char whitesp[]={" \t"};

blank and tab will be valid white space (this is

a "char[]").

break: a string of the valid break characters. example:

char breakch[]={";,"};

semicolon and comma will be valid break characters

(this is a "char[]").

IMPORTANT: do not use the name "break" as a C

variable, as this is a reserved word in C.

quote: a string of the valid quote characters. an example

would be

char whitesp[]={"'\"");

(this causes single and double quotes to be valid)

note that a token starting with one of these characters

needs the same quote character to terminate it.

for example,

"ABC '

is unterminated, but

"DEF" and 'GHI'

are properly terminated. note that different quote

characters can appear on the same line; only for

a given token do the quote characters have to be

the same (this is a "char[]").

escape: the escape character (NOT a string ... only one

allowed). use zero if none is desired (this is

a "char").

brkused: the break character used to terminate the current

token. if the token was quoted, this will be the

quote used. if the token is the last one on the

line, this will be zero (this is a pointer to a

"char").

next: this variable points to the first character of the

next token. it gets reset by "tokenizer" as it steps

through the string. set it to 0 upon initialization,

and leave it alone after that. you can change it

if you want to jump around in the string or re-parse

from the beginning, but be careful (this is a

pointer to an "int").

quoted: set to 1 (true) if the token was quoted and 0 (false)

if not. you may need this information (for example:

in C, a string with quotes around it is a character

string, while one without is an identifier).

(this is a pointer to a "char").

*/

/* states */

#define IN_WHITE 0

#define IN_TOKEN 1

#define IN_QUOTE 2

#define IN_OZONE 3

int _p_state; /* current state */

unsigned _p_flag; /* option flag */

char _p_curquote; /* current quote char */

int _p_tokpos; /* current token pos */

/* routine to find character in string ... used only by "tokenizer" */

int sindex(char ch,char *string)

{

char *cp;

for(cp=string;*cp;++cp)

if(ch==*cp)

return (int)(cp-string); /* return postion of character */

return -1; /* eol ... no match found */

}

/* routine to store a character in a string ... used only by "tokenizer" */

void chstore(char *string,int max,char ch)

{

char c;

if(_p_tokpos>=0&&_p_tokpos<max-1)

{

if(_p_state==IN_QUOTE)

c=ch;

else

switch(_p_flag&3)

{

case 1: /* convert to upper */

c=toupper(ch);

break;

case 2: /* convert to lower */

c=tolower(ch);

break;

default: /* use as is */

c=ch;

break;

}

string[_p_tokpos++]=c;

}

return;

}

int tokenizer(unsigned inflag,char *token,int tokmax,char *line,

char *white,char *brkchar,char *quote,char eschar,char *brkused,

int *next,char *quoted)

{

int qp;

char c,nc;

*brkused=0; /* initialize to null */

*quoted=0; /* assume not quoted */

if(!line[*next]) /* if we're at end of line, indicate such */

return 1;

_p_state=IN_WHITE; /* initialize state */

_p_curquote=0; /* initialize previous quote char */

_p_flag=inflag; /* set option flag */

for(_p_tokpos=0;(c=line[*next]);++(*next)) /* main loop */

{

if((qp=sindex(c,brkchar))>=0) /* break */

{

switch(_p_state)

{

case IN_WHITE: /* these are the same here ... */

case IN_TOKEN: /* ... just get out */

case IN_OZONE: /* ditto */

++(*next);

*brkused=brkchar[qp];

goto byebye;

case IN_QUOTE: /* just keep going */

chstore(token,tokmax,c);

break;

}

}

else if((qp=sindex(c,quote))>=0) /* quote */

{

switch(_p_state)

{

case IN_WHITE: /* these are identical, */

_p_state=IN_QUOTE; /* change states */

_p_curquote=quote[qp]; /* save quote char */

*quoted=1; /* set to true as long as something is in quotes */

break;

case IN_QUOTE:

if(quote[qp]==_p_curquote) /* same as the beginning quote? */

{

_p_state=IN_OZONE;

_p_curquote=0;

}

else

chstore(token,tokmax,c); /* treat as regular char */

break;

case IN_TOKEN:

case IN_OZONE:

*brkused=c; /* uses quote as break char */

goto byebye;

}

}

else if((qp=sindex(c,white))>=0) /* white */

{

switch(_p_state)

{

case IN_WHITE:

case IN_OZONE:

break; /* keep going */

case IN_TOKEN:

_p_state=IN_OZONE;

break;

case IN_QUOTE:

chstore(token,tokmax,c); /* it's valid here */

break;

}

}

else if(c==eschar) /* escape */

{

nc=line[(*next)+1];

if(nc==0) /* end of line */

{

*brkused=0;

chstore(token,tokmax,c);

++(*next);

goto byebye;

}

switch(_p_state)

{

case IN_WHITE:

--(*next);

_p_state=IN_TOKEN;

break;

case IN_TOKEN:

case IN_QUOTE:

++(*next);

chstore(token,tokmax,nc);

break;

case IN_OZONE:

goto byebye;

}

}

else /* anything else is just a real character */

{

switch(_p_state)

{

case IN_WHITE:

_p_state=IN_TOKEN; /* switch states */

case IN_TOKEN: /* these 2 are */

case IN_QUOTE: /* identical here */

chstore(token,tokmax,c);

break;

case IN_OZONE:

goto byebye;

}

}

} /* end of main loop */

byebye:

token[_p_tokpos]=0; /* make sure token ends with EOS */

return 0;

}

/*

* Local Variables:

* mode: c

* c-basic-offset: 8

* fill-column: 78

* End:

*/