1
2
3
4
5
6
7
8
9
10
11
12
13
14
15
16
17
18
19
20
21
22
23
24
25
26
27
28
29
30
31
32
33
34
35
36
37
38
39
40
41
42
43
44
45
46
47
48
49
50
51
52
53
54
55
56
57
58
59
60
61
62
63
64
65
66
67
68
69
70
71
72
73
74
75
76
77
78
79
80
81
82
83
84
85
86
87
88
89
90
91
92
93
94
95
96
97
98
99
100
101
102
103
104
105
106
107
108
109
110
111
112
113
114
115
116
117
118
119
120
121
122
123
124
125
126
127
128
129
130
131
132
133
134
135
136
137
138
139
140
141
142
143
144
145
146
147
148
149
150
151
152
153
154
155
156
157
158
159
160
161
162
163
164
165
166
167
168
169
170
171
172
173
174
175
176
177
178
179
180
181
182
183
184
185
186
187
188
189
190
191
|
/******************************************************************************
pamsplit
*******************************************************************************
Split a Netpbm format input file into multiple Netpbm format output files
with one image per output file.
By Bryan Henderson, Olympia WA; June 2000
Contributed to the public domain by its author.
******************************************************************************/
#define _DEFAULT_SOURCE 1 /* New name for SVID & BSD source defines */
#define _BSD_SOURCE 1 /* Make sure strdup() is in string.h */
#define _XOPEN_SOURCE 500 /* Make sure strdup() is in string.h */
#include <string.h>
#include <stdio.h>
#include "pm_c_util.h"
#include "shhopt.h"
#include "nstring.h"
#include "mallocvar.h"
#include "pam.h"
struct cmdlineInfo {
/* All the information the user supplied in the command line,
in a form easy for the program to use.
*/
const char * inputFileName;
const char * outputFilePattern;
unsigned int debug;
unsigned int padname;
};
static void
parseCommandLine(int argc, const char ** argv,
struct cmdlineInfo * const cmdlineP) {
/*----------------------------------------------------------------------------
Note that the pointers we place into *cmdlineP are sometimes to storage
in the argv array.
-----------------------------------------------------------------------------*/
optEntry * option_def;
optStruct3 opt;
unsigned int padnameSpec;
unsigned int option_def_index;
MALLOCARRAY_NOFAIL(option_def, 100);
option_def_index = 0; /* incremented by OPTENT3 */
OPTENT3(0, "debug", OPT_FLAG, NULL, &cmdlineP->debug, 0);
OPTENT3(0, "padname", OPT_UINT, &cmdlineP->padname, &padnameSpec, 0);
opt.opt_table = option_def;
opt.short_allowed = FALSE; /* We have no short (old-fashioned) options */
opt.allowNegNum = FALSE; /* We have no parms that are negative numbers */
pm_optParseOptions4(&argc, argv, opt, sizeof(opt), 0);
/* Uses and sets argc, argv, and some of *cmdlineP and others. */
if (!padnameSpec)
cmdlineP->padname = 0;
if (argc - 1 < 1)
cmdlineP->inputFileName = "-";
else
cmdlineP->inputFileName = argv[1];
if (argc -1 < 2)
cmdlineP->outputFilePattern = "image%d";
else
cmdlineP->outputFilePattern = argv[2];
if (!strstr(cmdlineP->outputFilePattern, "%d"))
pm_error("output file spec pattern parameter must include the "
"string '%%d',\n"
"to stand for the image sequence number.\n"
"You specified '%s'.", cmdlineP->outputFilePattern);
}
static void
extractOneImage(FILE * const infileP,
FILE * const outfileP) {
struct pam inpam;
struct pam outpam;
enum pm_check_code checkRetval;
unsigned int row;
tuple * tuplerow;
pnm_readpaminit(infileP, &inpam, PAM_STRUCT_SIZE(tuple_type));
pnm_checkpam(&inpam, PM_CHECK_BASIC, &checkRetval);
outpam = inpam;
outpam.file = outfileP;
pnm_writepaminit(&outpam);
tuplerow = pnm_allocpamrow(&inpam);
for (row = 0; row < inpam.height; ++row) {
pnm_readpamrow(&inpam, tuplerow);
pnm_writepamrow(&outpam, tuplerow);
}
pnm_freepamrow(tuplerow);
}
static void
computeOutputName(char const outputFilePattern[],
unsigned int const padCount,
unsigned int const imageSeq,
const char ** const outputNameP) {
/*----------------------------------------------------------------------------
Compute the name of an output file given the pattern
outputFilePattern[] and the image sequence number 'imageSeq'.
outputFilePattern[] contains at least one instance of the string
"%d" and we substitute the ASCII decimal representation of
imageSeq for the firstone of them to generate the output file
name. We add leading zeroes as necessary to bring the number up to
at least 'padCount' characters.
-----------------------------------------------------------------------------*/
char * beforeSub;
const char * afterSub;
const char * filenameFormat;
/* A format string for asprintfN for the file name */
beforeSub = strdup(outputFilePattern);
*(strstr(beforeSub, "%d")) = '\0';
afterSub = strstr(outputFilePattern, "%d") + 2;
/* Make filenameFormat something like "%s%04u%s" */
pm_asprintf(&filenameFormat, "%%s%%0%ud%%s", padCount);
pm_asprintf(outputNameP, filenameFormat, beforeSub, imageSeq, afterSub);
pm_strfree(filenameFormat);
free(beforeSub);
}
int
main(int argc, const char *argv[]) {
struct cmdlineInfo cmdline;
FILE * ifP;
int eof; /* No more images in input */
unsigned int imageSeq;
/* Sequence of current image in input file. First = 0 */
pm_proginit(&argc, argv);
parseCommandLine(argc, argv, &cmdline);
ifP = pm_openr(cmdline.inputFileName);
eof = FALSE;
for (imageSeq = 0; !eof; ++imageSeq) {
FILE * ofP;
const char * outputFileName; /* malloc'ed */
computeOutputName(cmdline.outputFilePattern, cmdline.padname,
imageSeq,
&outputFileName);
pm_message("WRITING %s", outputFileName);
ofP = pm_openw(outputFileName);
extractOneImage(ifP, ofP);
pm_close(ofP);
pm_strfree(outputFileName);
pnm_nextimage(ifP, &eof);
}
pm_close(ifP);
return 0;
}
|
