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#include <assert.h>
#include <nstring.h>
#include <pam.h>
#include "pm_c_util.h"
#include "shhopt.h"
#include "mallocvar.h"
typedef struct {
unsigned int * target;
unsigned int targetDepth;
unsigned int machine;
const char * color; /* NULL means not specified */
const char * inputFileName;
} CmdLineInfo;
static CmdLineInfo
parsedCommandLine(int argc,
const char ** const argv) {
optEntry * option_def;
/* Instructions to OptParseOptions4 on how to parse our options.
*/
optStruct3 opt;
unsigned int option_def_index;
CmdLineInfo cmdLine;
unsigned int targetSpec, colorSpec;
const char ** target;
MALLOCARRAY_NOFAIL(option_def, 100);
option_def_index = 0; /* incremented by OPTENT3 */
OPTENT3(0, "target", OPT_STRINGLIST, &target, &targetSpec, 0);
OPTENT3(0, "color", OPT_STRING, &cmdLine.color, &colorSpec, 0);
OPTENT3(0, "machine", OPT_FLAG, NULL, &cmdLine.machine, 0);
OPTENT3(0, 0, OPT_END, NULL, NULL, 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);
if (targetSpec + colorSpec > 1)
pm_error("You cannot specify both -target and -color");
else if (targetSpec + colorSpec == 0)
pm_error("You must specify either -target or -color");
else if (targetSpec) {
unsigned int i;
cmdLine.color = NULL;
cmdLine.target = NULL; /* initial value */
for (i = 0, cmdLine.targetDepth = 0; target[i]; ++i) {
unsigned int sampleVal;
const char * error;
pm_string_to_uint(target[i], &sampleVal, &error);
if (error) {
pm_error("Invalid sample value in -target option: '%s'. "
"%s", target[i], error);
}
REALLOCARRAY(cmdLine.target, i+1);
cmdLine.target[cmdLine.targetDepth++] = sampleVal;
}
free(target);
} else
assert (colorSpec == 1);
if (argc-1 < 1)
cmdLine.inputFileName = "-";
else {
cmdLine.inputFileName = argv[1];
if (argc-1 > 1)
pm_error("Too many arguments: %u. "
"The only possible argument is the input file name",
argc-1);
}
free(option_def);
return cmdLine;
}
static void
freeCmdLine(CmdLineInfo const cmdLine) {
if (!cmdLine.color)
pnm_freepamtuple(cmdLine.target);
}
static tuple
targetValue(CmdLineInfo const cmdLine,
struct pam * const inpamP) {
/*----------------------------------------------------------------------------
The tuple value user wants us to find in the image, per 'cmdLine'.
The return value is to be interpreted per *inpamP.
-----------------------------------------------------------------------------*/
tuple retval;
if (cmdLine.color) {
if (inpamP->depth != 3)
pm_error("You specified -color, but the input image has "
"depth %u, not 3", inpamP->depth);
else
retval = pnm_parsecolor(cmdLine.color, inpamP->maxval);
} else {
if (cmdLine.targetDepth != inpamP->depth)
pm_error("You specified a %u-tuple for -target, "
"but the input image is of depth %u",
cmdLine.targetDepth, inpamP->depth);
else {
unsigned int i;
retval = pnm_allocpamtuple(inpamP);
for (i = 0; i < inpamP->depth; ++i)
retval[i] = cmdLine.target[i];
}
}
return retval;
}
static void
printHeader(FILE * const ofP,
struct pam * const inpamP,
tuple const target) {
unsigned int plane;
fprintf(ofP, "Locations containing tuple ");
fprintf(ofP, "(");
for (plane = 0; plane < inpamP->depth; ++plane) {
fprintf(ofP, "%u", (unsigned)target[plane]);
if (plane + 1 < inpamP->depth)
fprintf(ofP, "/");
}
fprintf(ofP, ")");
fprintf(ofP, "/%u", (unsigned)inpamP->maxval);
fprintf(ofP, ":\n");
}
static unsigned int
decimalDigitCt(unsigned int const n) {
/*----------------------------------------------------------------------------
Minimum number of digits needed to display 'n' in decimal.
-----------------------------------------------------------------------------*/
unsigned int digitCt;
if (n == 0)
digitCt = 1;
else {
unsigned int x;
for (digitCt = 0, x = n; x > 0;) {
++digitCt;
x /= 10;
}
assert(digitCt > 0);
}
return digitCt;
}
static void
pamfind(FILE * const ifP,
struct pam * const inpamP,
CmdLineInfo const cmdLine,
FILE * const ofP) {
pnm_readpaminit(ifP, inpamP, PAM_STRUCT_SIZE(tuple_type));
{
tuple * const inputRow = pnm_allocpamrow(inpamP);
tuple const target = targetValue(cmdLine, inpamP);
unsigned int row;
const char * fmt;
if (cmdLine.machine) {
pm_asprintf(&fmt, "%%0%uu %%0%uu\n",
decimalDigitCt(inpamP->height-1),
decimalDigitCt(inpamP->width-1));
} else {
printHeader(ofP, inpamP, target);
fmt = pm_strdup("(%u, %u)\n");
}
for (row = 0; row < inpamP->height; ++row) {
unsigned int col;
pnm_readpamrow(inpamP, inputRow);
for (col = 0; col < inpamP->width; ++col) {
if (pnm_tupleequal(inpamP, target, inputRow[col])) {
fprintf(ofP, fmt, row, col);
}
}
}
pm_strfree(fmt);
pnm_freepamtuple(target);
pnm_freepamrow(inputRow);
}
}
int
main(int argc, const char *argv[]) {
FILE * ifP;
CmdLineInfo cmdLine;
struct pam inpam;
pm_proginit(&argc, argv);
cmdLine = parsedCommandLine(argc, argv);
ifP = pm_openr(cmdLine.inputFileName);
pamfind(ifP, &inpam, cmdLine, stdout);
freeCmdLine(cmdLine);
pm_close(inpam.file);
return 0;
}
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