diff options
Diffstat (limited to 'converter/pbm/atktopbm.c')
| -rw-r--r-- | converter/pbm/atktopbm.c | 37 |
1 files changed, 22 insertions, 15 deletions
diff --git a/converter/pbm/atktopbm.c b/converter/pbm/atktopbm.c index 807e4f4a..eb3c071a 100644 --- a/converter/pbm/atktopbm.c +++ b/converter/pbm/atktopbm.c @@ -44,7 +44,7 @@ #define dataobject_OBJECTCREATIONFAILED 4 #define dataobject_BADFORMAT 5 -/* ReadRow(file, row, length) +/* ReadRow(file, row, length) ** Reads from 'file' the encoding of bytes to fill in 'row'. Row will be ** truncated or padded (with WHITE) to exactly 'length' bytes. ** @@ -52,7 +52,7 @@ ** '|' correct end of line ** '\0' if the length was satisfied (before a terminator) ** EOF if the file ended -** '\' '{' other recognized ends. +** '\' '{' other recognized ends. ** The '|' is the expected end and pads the row with WHITE. ** The '\' and '{' are error conditions and may indicate the ** beginning of some other portion of the data stream. @@ -76,11 +76,11 @@ ReadRow(FILE * const file, 'file' is where to get them from. 'row' is where to put bytes. 'length' is how many bytes in row must be filled. - + Return the delimiter that marks the end of the row, or EOF if EOF marks the end of the row, or NUL in some cases. -----------------------------------------------------------------------------*/ - /* Each input character is processed by the central loop. There are + /* Each input character is processed by the central loop. There are ** some input codes which require two or three characters for ** completion; these are handled by advancing the state machine. ** Errors are not processed; instead the state machine is reset @@ -98,7 +98,7 @@ ReadRow(FILE * const file, RepeatAndDigit /* have seen repeat code and its first following digit */ }; - + enum StateCode InputState; /* current state */ int c; /* the current input character */ long repeatcount; /* current repeat value */ @@ -106,8 +106,8 @@ ReadRow(FILE * const file, long pendinghex; /* the first of a pair of hex characters */ int lengthRemaining; unsigned char * cursor; - - /* We cannot exit when length becomes zero because we need to check + + /* We cannot exit when length becomes zero because we need to check ** to see if a row ending character follows. Thus length is checked ** only when we get a data generating byte. If length then is ** zero, we ungetc the byte. @@ -148,7 +148,7 @@ ReadRow(FILE * const file, while (lengthRemaining-- > 0) *cursor++ = WHITEBYTE; return c; - + CASE1(0x21): CASE6(0x22): CASE8(0x28): @@ -227,9 +227,9 @@ ReadRow(FILE * const file, break; store: - /* generate byte(s) into the output row + /* generate byte(s) into the output row Use repeatcount, depending on state. */ - if (lengthRemaining < repeatcount) + if (lengthRemaining < repeatcount) /* reduce repeat count if it would exceed available space */ repeatcount = lengthRemaining; @@ -269,7 +269,7 @@ ReadATKRaster(FILE * const ifP) { pm_error ("input file not Andrew raster object"); fscanf(ifP, " %d ", &version); - if (version < 2) + if (version < 2) pm_error ("version too old to parse"); { @@ -277,8 +277,8 @@ ReadATKRaster(FILE * const ifP) { long xscale, yscale; long xoffset, yoffset, subwidth, subheight; /* ignore all these features: */ - fscanf(ifP, " %u %ld %ld %ld %ld %ld %ld", - &options, &xscale, &yscale, &xoffset, + fscanf(ifP, " %u %ld %ld %ld %ld %ld %ld", + &options, &xscale, &yscale, &xoffset, &yoffset, &subwidth, &subheight); } /* scan to end of line in case this is actually something beyond V2 */ @@ -291,8 +291,12 @@ ReadATKRaster(FILE * const ifP) { fscanf(ifP, " %d %d %d ", &objectid, &width, &height); - if (width < 1 || height < 1 || width > 1000000 || height > 1000000) + if (width < 1 || height < 1 || width > 1000000 || height > 1000000) pm_error("bad width or height"); + /* Note: Whether these values are upper limits set by the author of + the original version of this program, or come from the official + file format specification is unknown. + */ pbm_writepbminit(stdout, width, height, 0); bitrow = pbm_allocrow_packed(width); @@ -302,7 +306,7 @@ ReadATKRaster(FILE * const ifP) { long const nextChar = ReadRow(ifP, bitrow, rowlen); switch (nextChar) { - case '|': + case '|': pbm_writepbmrow_packed(stdout, bitrow, width, 0); break; case EOF: @@ -349,3 +353,6 @@ main(int argc, const char ** argv) { return 0; } + + + |