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#include "config.h"
#include "unicode.h"
#include <stdlib.h>
#include <stdio.h>
#include "utf8error.h"
/*
* Read a line of arbitrary length from a stream.
*
* Return a pointer to the null-terminated string allocated, or null on failure
* to allocate sufficient storage.
* It is the responsibility of the caller to free the space allocated.
*
* The length of the line is placed in the variable pointed to by
* the second argument. (-1) is placed in this variable on EOF.
* A value of zero indicates that an empty line was read.
*/
#define INITLENGTH 32
#define MSGSIZE 128
static char msg [MSGSIZE];
int
ReportReadError(
FILE *fp,
UTF32 c, /* Error code */
unsigned char *rp, /* Pointer to raw input sequence */
unsigned long RecordNumber,
unsigned long ByteCnt)
{
extern void ExplicateBadUTF8(FILE *, unsigned char *);
switch (c)
{
case UTF8_NOTENOUGHBYTES:
fprintf(fp,"Truncated UTF-8 sequence encountered at record %ld, byte %ld.\n",
RecordNumber, ByteCnt);
exit(1);
break;
case UTF8_BADINCODE:
fprintf(fp,"Invalid UTF-8 code encountered at record %ld, byte %ld.\n",
RecordNumber, ByteCnt);
ExplicateBadUTF8(fp,rp);
exit(1);
break;
case UTF8_BADOUTCODE:
fprintf(fp,"Encountered invalid Unicode at record %ld, byte %ld.\n",
RecordNumber, ByteCnt);
exit(1);
break;
case UTF8_IOERROR:
snprintf(msg,MSGSIZE-1,"Error reading input at record %ld, byte %ld.\n",
RecordNumber,ByteCnt);
perror(msg);
exit(1);
break;
default: /* Normal EOF */
return(0);
break; /* NOTREACHED */
}
}
UTF32 * wcgetline(FILE *fp, int *LineLength,unsigned long LineNumber)
{
UTF32 c;
int Available;
int CharsRead;
UTF32 *Line;
int BytesRead;
unsigned char *rawptr;
extern UTF32 UTF8in (int,int *,unsigned char **);
Available = INITLENGTH;
CharsRead=0;
BytesRead=0;
Line = (UTF32 *) malloc(sizeof(UTF32) * (size_t)Available);
if(Line == NULL) return (Line);
while ((c = UTF8in(fileno(fp),&BytesRead,&rawptr)) < UNI_MAX_UTF32) {
if(c == 0x000A) {
Line[CharsRead]= 0L;
*LineLength=CharsRead;
return(Line);
}
BytesRead++;
if(CharsRead == (Available-1)){ /* -1 because of null */
Available += INITLENGTH/2;
Line = (UTF32 *) realloc( (void *) Line, (size_t) (Available * sizeof (UTF32)));
if(Line == NULL) return(Line);
}
Line[CharsRead++]=c;
}
if(c == UTF8_ENDOFFILE){
Line[CharsRead]= 0L;
if(BytesRead == 0) *LineLength = (-1); /* Signal EOF */
else *LineLength=CharsRead;
return(Line);
}
ReportReadError(stderr,c,rawptr,LineNumber,BytesRead);
}
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