/* ppmtoarbtxt.c - convert PPM to a custom text-based format ** ** Renamed from ppmtotxt.c by Bryan Henderson in January 2003. ** ** Copyright (C) 1995 by Peter Kirchgessner ** ** Permission to use, copy, modify, and distribute this software and its ** documentation for any purpose and without fee is hereby granted, provided ** that the above copyright notice appear in all copies and that both that ** copyright notice and this permission notice appear in supporting ** documentation. This software is provided "as is" without express or ** implied warranty. */ #include #include #ifdef __GLIBC__ #include /* Necessary for parse_printf_format() */ #endif #include "pm_c_util.h" #include "mallocvar.h" #include "nstring.h" #include "shhopt.h" #include "ppm.h" /* HAVE_PARSE_PRINTF_FORMAT means the system library has parse_printf_format(), declared in . This essentially means systems with GNU libc. */ #ifndef HAVE_PARSE_PRINTF_FORMAT #ifdef PA_FLAG_MASK /* Defined in printf.h */ #define HAVE_PARSE_PRINTF_FORMAT 1 #else #define HAVE_PARSE_PRINTF_FORMAT 0 #endif #endif 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 * bodySklFileName; const char * hd; const char * tl; unsigned int debug; }; static void parseCommandLine(int argc, const char ** argv, struct CmdlineInfo * const cmdlineP) { /*---------------------------------------------------------------------------- Note that many of the strings that this function returns in the *cmdline_p structure are actually in the supplied argv array. And sometimes, one of these strings is actually just a suffix of an entry in argv! -----------------------------------------------------------------------------*/ optEntry * option_def; optStruct3 opt; unsigned int hdSpec, tlSpec; unsigned int option_def_index; MALLOCARRAY(option_def, 100); option_def_index = 0; /* incremented by OPTENTRY */ OPTENT3(0, "hd", OPT_STRING, &cmdlineP->hd, &hdSpec, 0); OPTENT3(0, "tl", OPT_STRING, &cmdlineP->tl, &tlSpec, 0); OPTENT3(0, "debug", OPT_FLAG, NULL, &cmdlineP->debug, 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); free(option_def); if (!hdSpec) cmdlineP->hd = NULL; if (!tlSpec) cmdlineP->tl = NULL; if (argc-1 < 1) pm_error("You must specify the body skeleton file name as an " "argument"); else { cmdlineP->bodySklFileName = strdup(argv[1]); if (argc-1 < 2) cmdlineP->inputFileName = strdup("-"); /* he wants stdin */ else { cmdlineP->inputFileName = strdup(argv[2]); if (argc-1 > 2) pm_error("Too many arguments. The only possible arguments " "are the body skeleton file name and input image " "file name"); } } } typedef enum { /* The types of object we handle */ BDATA, IRED, IGREEN, IBLUE, ILUM, FRED, FGREEN, FBLUE, FLUM, WIDTH, HEIGHT, POSX, POSY } SkeletonObjectType; typedef enum { OBJTYP_ICOLOR, OBJTYP_FCOLOR, OBJTYP_INT, OBJTYP_BDATA } SkeletonObjectClass; /* Maximum size for a format string ("%d" etc.) */ /* Add one to this size for the terminating '\0'. */ #define MAXFORMAT 16 typedef union { /* The data we keep for each object */ struct Bndat { char * bdat; /* Binary data (text with newlines etc.) */ unsigned int ndat; } binData; struct Icdat { char icformat[MAXFORMAT+1]; /* Integer colors */ unsigned int icolmin, icolmax; } icolData; struct Fcdat { char fcformat[MAXFORMAT+1]; /* Float colors */ double fcolmin, fcolmax; } fcolData; struct Idat { char iformat[MAXFORMAT+1]; /* Integer data */ } iData; } SkeletonObjectData; /* Each object has a type and some data */ typedef struct { SkeletonObjectType objType; SkeletonObjectData odata; } SkeletonObject; #define MAX_SKL_HEAD_OBJ 64 #define MAX_SKL_BODY_OBJ 256 #define MAX_SKL_TAIL_OBJ 64 #define MAX_LINE_BUF 1024 #define MAX_OBJ_BUF 80 static void dumpSkeleton(SkeletonObject ** const skeletonPList, unsigned int const nSkeleton) { unsigned int i; pm_message("%u objects", nSkeleton); for (i = 0; i < nSkeleton; ++i) { SkeletonObject * const skeletonP = skeletonPList[i]; pm_message(" Object: Type %u", skeletonP->objType); } } static void dumpAllSkeleton(SkeletonObject ** const bodySkeletonPList, unsigned int const bodyNskl, SkeletonObject ** const headSkeletonPList, unsigned int const headNskl, SkeletonObject ** const tailSkeletonPList, unsigned int const tailNskl) { pm_message("Body skeleton:"); dumpSkeleton(bodySkeletonPList, bodyNskl); pm_message("Head skeleton:"); dumpSkeleton(headSkeletonPList, headNskl); pm_message("Tail skeleton:"); dumpSkeleton(tailSkeletonPList, tailNskl); } static void writeBndat(FILE * const ofP, SkeletonObject * const objectP) { struct Bndat * const bdataP = &objectP->odata.binData; fwrite(bdataP->bdat, bdataP->ndat, 1, ofP); } static void writeIcol(FILE * const ofP, SkeletonObject * const objectP, double const value) { /* Unlike Netpbm, the output format does not have an upper limit for maxval. Here we allow all values representable by unsigned int. */ struct Icdat * const icdataP = &objectP->odata.icolData; unsigned int const outValue = ROUNDU( icdataP->icolmin + ((double)icdataP->icolmax - icdataP->icolmin) * value); fprintf(ofP, icdataP->icformat, outValue); } static void writeFcol(FILE * const ofP, SkeletonObject * const objectP, double const value) { struct Fcdat * const fcdataP = &objectP->odata.fcolData; fprintf(ofP, fcdataP->fcformat, (double) (fcdataP->fcolmin + (fcdataP->fcolmax - fcdataP->fcolmin) * value)); } static void writeIdat(FILE * const ofP, SkeletonObject * const objectP, unsigned int const value) { struct Idat * const idataP = &objectP->odata.iData; fprintf(ofP, idataP->iformat, value); } static void writeText(FILE * const ofP, unsigned int const nObj, SkeletonObject ** const obj, unsigned int const width, unsigned int const height, unsigned int const x, unsigned int const y, double const red, double const green, double const blue) { unsigned int i; for (i = 0; i < nObj; ++i) { switch (obj[i]->objType) { case BDATA: writeBndat(ofP, obj[i]); break; case IRED: writeIcol(ofP, obj[i], red); break; case IGREEN: writeIcol(ofP, obj[i], green); break; case IBLUE: writeIcol(ofP, obj[i], blue); break; case ILUM: writeIcol(ofP, obj[i], PPM_LUMINR*red + PPM_LUMING*green + PPM_LUMINB*blue); break; case FRED: writeFcol(ofP, obj[i], red); break; case FGREEN: writeFcol(ofP, obj[i], green); break; case FBLUE: writeFcol(ofP, obj[i], blue); break; case FLUM: writeFcol(ofP, obj[i], PPM_LUMINR*red + PPM_LUMING*green + PPM_LUMINB*blue); break; case WIDTH: writeIdat(ofP, obj[i], width); break; case HEIGHT: writeIdat(ofP, obj[i], height); break; case POSX: writeIdat(ofP, obj[i], x); break; case POSY: writeIdat(ofP, obj[i], y); break; } } } static SkeletonObjectClass objClass(SkeletonObjectType const objType) { switch (objType) { case IRED: case IGREEN: case IBLUE: case ILUM: return OBJTYP_ICOLOR; case FRED: case FGREEN: case FBLUE: case FLUM: return OBJTYP_FCOLOR; case WIDTH: case HEIGHT: case POSX: case POSY: return OBJTYP_INT; case BDATA: return OBJTYP_BDATA; } return 999; /* quiet compiler warning */ } /*---------------------------------------------------------------------------- Format string validation We validate format strings (such as "%f" "%03d") found in the skeleton files for convenience, even though behavior is documented as undefined when the user supplies a bogus format string. Certain strings, most notably those with "%n", are especially risky; they pose a security threat. On systems with Glibc, we check with parse_printf_format(). On other systems we conduct a cursory scan of the characters in the format string, looking for characters that trigger non-numeric conversions, etc. Documentation for parse_printf_format() is usually available in texinfo format on GNU/Linux systems. As of Dec. 2014 there is no official man page. Online documentation is available from: https:// www.gnu.org/software/libc/manual/html_node/Parsing-a-Template-String.html -----------------------------------------------------------------------------*/ #if HAVE_PARSE_PRINTF_FORMAT static void validateParsePrintfFlag(int const printfConversion, SkeletonObjectType const ctyp, const char ** const errorP) { /*---------------------------------------------------------------------------- Assuming 'printfConversion' is the value reported by parse_printf_format() as the type of argument a format string requires, return an explanation of how it is incompatible with 'ctyp' as *errorP -- return null string if it is compatible. -----------------------------------------------------------------------------*/ /* We first check for "%n", then the type modifiers, and finally the actual conversion type (char, int, float, double, string or pointer.) */ switch (printfConversion & PA_FLAG_MASK) { case PA_FLAG_PTR: /* This means %n */ pm_asprintf(errorP, "Contains a %%n conversion specifier"); break; case PA_FLAG_SHORT: case PA_FLAG_LONG: case PA_FLAG_LONG_LONG: /* We omit PA_FLAG_LONG_DOUBLE because it is a synonym for PA_FLAG_LONG_LONG: listing both causes compilation errors. */ pm_asprintf(errorP, "Invalid type modifier"); break; default: switch (printfConversion & ~PA_FLAG_MASK) { case PA_CHAR: pm_message("Warning: char type conversion."); case PA_INT: if(objClass(ctyp) == OBJTYP_ICOLOR || objClass(ctyp) == OBJTYP_INT ) *errorP = NULL; else pm_asprintf(errorP, "Conversion specifier requires a " "character or integer argument, but it is in " "a replacement sequence for a different type"); break; case PA_DOUBLE: if(objClass(ctyp) == OBJTYP_FCOLOR) *errorP = NULL; else pm_asprintf(errorP, "Conversion specifier requires a " "double precision floating point argument, " "but it is in " "a replacement sequence for a different type"); break; case PA_FLOAT: case PA_STRING: /* %s */ case PA_POINTER: /* %p */ default: pm_asprintf(errorP, "Conversion specifier requires an argument of " "a type that this program never provides for " "any replacement sequence"); } } } #endif #if HAVE_PARSE_PRINTF_FORMAT static void validateFormatWithPpf(const char * const format, SkeletonObjectType const ctyp, const char ** const errorP) { /*---------------------------------------------------------------------------- Validate format string 'format' for use with a skeleton of type 'ctyp', using the system parse_printf_format() function. Return as *errorP an explanation of how it is invalid, or a null string if it is valid. -----------------------------------------------------------------------------*/ /* We request parse_printf_format() to report the details of the first 8 conversions. 8 because the maximum length of format is 16 means it can have up to 8 conversions: "%d%d%d%d%d%d%d%d". Actually this is more than necessary: we are concerned with only the first conversion and whether there it is the only one. */ int printfConversion[MAXFORMAT/2] = {0, 0, 0, 0, 0, 0, 0, 0}; size_t const n = parse_printf_format(format, MAXFORMAT/2, printfConversion); switch (n) { case 0: pm_asprintf(errorP, "No transformation found"); break; case 1: validateParsePrintfFlag(printfConversion[0], ctyp, errorP); break; default: pm_asprintf(errorP, "Has %lu extra transformation%s ", (unsigned long)n-1, n-1 > 1 ? "s" : ""); break; } } #endif static void validateFormatOne(char const typeSpecifier, bool const isLastInString, SkeletonObjectType const ctyp, bool * const validatedP, const char ** const errorP) { switch (typeSpecifier) { /* Valid character encountered. Skip. */ /* ' ' (space) is listed here, but should never occur for we use sscanf() to parse the fields. */ case ' ': case '-': case '+': case '\'': case '#': case '.': case '0': case '1': case '2': case '3': case '4': case '5': case '6': case '7': case '8': case '9': break; case 'c': case 'C': pm_message("Warning: char type conversion: %%%c.", typeSpecifier); case 'i': case 'd': case 'u': case 'o': case 'x': case 'X': if (!isLastInString) pm_asprintf(errorP, "Extra characters at end"); else if(objClass(ctyp) != OBJTYP_ICOLOR && objClass(ctyp) != OBJTYP_INT ) pm_asprintf(errorP, "Conversion type mismatch"); else *validatedP = true; break; case 'f': case 'F': case 'g': case 'G': case 'a': case 'A': if (!isLastInString) pm_asprintf(errorP, "Extra characters at end"); else if(objClass(ctyp) != OBJTYP_FCOLOR) pm_asprintf(errorP, "Conversion type mismatch"); else *validatedP = true; break; case '\0': pm_asprintf(errorP, "No conversion specified"); break; case '%': pm_asprintf(errorP, "No more than one %% is allowed"); break; case '$': case '*': pm_asprintf(errorP, "%c is not allowed", typeSpecifier); break; case 'h': case 'l': case 'L': case 'q': case 'j': case 'Z': case 't': pm_asprintf(errorP, "Modifier %c is not allowed in format", typeSpecifier); break; case 's': case 'S': case 'm': case 'p': case 'n': pm_asprintf(errorP, "Invalid conversion type"); break; default: pm_asprintf(errorP, "Abnormal character"); break; } } static void validateFormatGen(const char * const format, SkeletonObjectType const ctyp, const char ** const errorP) { /*---------------------------------------------------------------------------- Validate format string 'format' for use with a skeleton of type 'ctyp', without using the system parse_printf_format() function. The string must begin with "%" and end with the translation type character ("%d", "%x", "%f", etc.) We check only for invalid characters. Invalid constructs, such as "%00.00.00d" will pass this test. Return as *errorP an explanation of how it is invalid, or a null string if it is valid. -----------------------------------------------------------------------------*/ if (format[0] != '%') pm_asprintf(errorP, "Does not start with %%"); else { unsigned int i; bool validated; for (i = 1, validated = false, *errorP = NULL; !validated && !*errorP; ++i) { validateFormatOne(format[i], format[i+1] == '\0', ctyp, &validated, errorP); } } } static void validateFormat(const char * const format, SkeletonObjectType const ctyp) { const char * error; if (strlen(format) > MAXFORMAT) pm_asprintf(&error, "Too long"); else { #if HAVE_PARSE_PRINTF_FORMAT if (true) validateFormatWithPpf(format, ctyp, &error); else /* Silence compiler warning about unused function */ validateFormatGen(format, ctyp, &error); #else validateFormatGen(format, ctyp, &error); #endif } if (error) pm_error("Invalid format string '%s'. %s", format, error); } static SkeletonObject * newBinDataObj(unsigned int const nDat, const char * const bdat) { /*---------------------------------------------------------------------------- Create a binary data object. -----------------------------------------------------------------------------*/ SkeletonObject * objectP; objectP = malloc(sizeof(*objectP) + nDat); if (!objectP) pm_error("Failed to allocate memory for binary data object " "with %u bytes", nDat); objectP->objType = BDATA; objectP->odata.binData.ndat = nDat; objectP->odata.binData.bdat = ((char *)objectP) + sizeof(SkeletonObject); memcpy(objectP->odata.binData.bdat, bdat, nDat); return objectP; } static SkeletonObject * newIcolDataObj(SkeletonObjectType const ctyp, const char * const format, unsigned int const icolmin, unsigned int const icolmax) { /*---------------------------------------------------------------------------- Create integer color data object. -----------------------------------------------------------------------------*/ SkeletonObject * objectP; MALLOCVAR(objectP); if (!objectP) pm_error("Failed to allocate memory for an integer color data " "object"); objectP->objType = ctyp; validateFormat(format, ctyp); strcpy(objectP->odata.icolData.icformat, format); objectP->odata.icolData.icolmin = icolmin; objectP->odata.icolData.icolmax = icolmax; return objectP; } static SkeletonObject * newFcolDataObj(SkeletonObjectType const ctyp, const char * const format, double const fcolmin, double const fcolmax) { /*---------------------------------------------------------------------------- Create float color data object. -----------------------------------------------------------------------------*/ SkeletonObject * objectP; MALLOCVAR(objectP); if (!objectP) pm_error("Failed to allocate memory for a float color data object"); objectP->objType = ctyp; validateFormat(format, ctyp); strcpy(objectP->odata.fcolData.fcformat, format); objectP->odata.fcolData.fcolmin = fcolmin; objectP->odata.fcolData.fcolmax = fcolmax; return objectP; } static SkeletonObject * newIdataObj(SkeletonObjectType const ctyp, const char * const format) { /*---------------------------------------------------------------------------- Create universal data object. -----------------------------------------------------------------------------*/ SkeletonObject * objectP; MALLOCVAR(objectP); if (!objectP) pm_error("Failed to allocate memory for a universal data object"); objectP->objType = ctyp; validateFormat(format, ctyp); strcpy(objectP->odata.iData.iformat, format); return objectP; } static char const escape = '#'; static SkeletonObjectType interpretObjType(const char * const typstr) { SkeletonObjectType objType; /* handle integer colors */ if (streq(typstr, "ired") ) objType = IRED; else if (streq(typstr, "igreen")) objType = IGREEN; else if (streq(typstr, "iblue") ) objType = IBLUE; else if (streq(typstr, "ilum") ) objType = ILUM; /* handle real colors */ else if (streq(typstr, "fred") ) objType = FRED; else if (streq(typstr, "fgreen")) objType = FGREEN; else if (streq(typstr, "fblue") ) objType = FBLUE; else if (streq(typstr, "flum") ) objType = FLUM; /* handle integer data */ else if (streq(typstr, "width") ) objType = WIDTH; else if (streq(typstr, "height")) objType = HEIGHT; else if (streq(typstr, "posx") ) objType = POSX; else if (streq(typstr, "posy") ) objType = POSY; else objType = BDATA; return objType; } static SkeletonObject * newIcSkelFromReplString(const char * const icolorObjstr, SkeletonObjectType const objType) { /*---------------------------------------------------------------------------- A new skeleton for an integer color substitution specifier (class OBJTYP_ICOLOR) whose replacement string (the stuff between the parentheses in #(...)) says substitution type 'objType' and the rest of the replacement string is 'icolorObjstr'. -----------------------------------------------------------------------------*/ SkeletonObject * retval; unsigned int icolmin, icolmax; char formstr[MAX_OBJ_BUF]; int nOdata; nOdata = sscanf(icolorObjstr, "%s%u%u", formstr, &icolmin, &icolmax); if (nOdata == 3) retval = newIcolDataObj(objType, formstr, icolmin, icolmax); else if (nOdata == EOF) { /* No arguments specified. Use defaults */ retval = newIcolDataObj(objType, "%u", 0, 255); } else retval = NULL; return retval; } static SkeletonObject * newFcSkelFromReplString(const char * const fcolorObjstr, SkeletonObjectType const objType) { /*---------------------------------------------------------------------------- A new skeleton for a floating point color substitution specifier (class OBJTYP_FCOLOR) whose replacement string (the stuff between the parentheses in #(...)) says substitution type 'objType' and the rest of the replacement string is 'fcolorObjstr'. -----------------------------------------------------------------------------*/ SkeletonObject * retval; double fcolmin, fcolmax; char formstr[MAX_OBJ_BUF]; int nOdata; nOdata = sscanf(fcolorObjstr, "%s%lf%lf", formstr, &fcolmin, &fcolmax); if (nOdata == 3) retval = newFcolDataObj(objType, formstr, fcolmin, fcolmax); else if (nOdata == EOF) { /* No arguments specified. Use defaults */ retval = newFcolDataObj(objType, "%f", 0.0, 1.0); } else retval = NULL; return retval; } static SkeletonObject * newISkelFromReplString(const char * const intObjstr, SkeletonObjectType const objType) { /*---------------------------------------------------------------------------- A new skeleton for an integer substitution specifier (class OBJTYP_INT) whose replacement string (the stuff between the parentheses in #(...)) says substitution type 'objType' and the rest of the replacement string is 'intObjstr'. -----------------------------------------------------------------------------*/ SkeletonObject * retval; char formstr[MAX_OBJ_BUF]; int nOdata; nOdata = sscanf(intObjstr, "%s", formstr); if (nOdata == 1) retval = newIdataObj(objType, formstr); else if (nOdata == EOF) { /* No arguments specified. Use defaults */ retval = newIdataObj(objType, "%u"); } else retval = NULL; return retval; } static SkeletonObject * newSkeletonFromReplString(const char * const objstr) { /*---------------------------------------------------------------------------- A new skeleton created from the replacement string 'objstr' (the stuff between the parentheses in #(...) ). Return NULL if it isn't a valid replacement string. -----------------------------------------------------------------------------*/ /* We use sscanf() to parse the contents of objstr, giving it a format template with the largest number of fields possible plus one extra to pick up and check for the existence of invalid trailing characters. We read and discard fields beyond the first, if any. The appropriate new**SkelFromReplString() function determines their contents with a separate call to sscanf(). */ SkeletonObject * retval; char typstr[MAX_OBJ_BUF]; int typlen; SkeletonObjectType objType; int conversionCt; char s1[MAX_OBJ_BUF]; /* Dry read. */ char s2[MAX_OBJ_BUF]; /* Extra tailing characters. */ float f1, f2; /* Dry read. */ typstr[0] = '\0'; /* initial value */ conversionCt = sscanf(objstr, "%s%n%s%f%f%s", typstr, &typlen, s1, &f1, &f2, s2); switch (conversionCt) { case 1: case 2: case 4: objType = interpretObjType(typstr); break; default: objType = BDATA; } switch (objClass(objType)) { case OBJTYP_ICOLOR: retval = newIcSkelFromReplString(&objstr[typlen], objType); break; case OBJTYP_FCOLOR: retval = newFcSkelFromReplString(&objstr[typlen], objType); break; case OBJTYP_INT: retval = newISkelFromReplString(&objstr[typlen], objType); break; case OBJTYP_BDATA: retval = NULL; } return retval; } static void readThroughCloseParen(FILE * const ifP, char * const objstr, size_t const objstrSize, bool * const unclosedP) { /*---------------------------------------------------------------------------- Read *ifP up through close parenthesis ( ')' ) into 'objstr', which is of size 'objstrSize'. Make it a NUL-terminated string. Return *unclosedP true iff we run out of file or run out of objstr before we see a close parenthesis. In this case, return the rest of the file, or as much as fits, in 'objstr', not NUL-terminated. -----------------------------------------------------------------------------*/ unsigned int i; bool eof; bool gotEscSeq; for (i= 0, eof = false, gotEscSeq = false; i < objstrSize - 1 && !gotEscSeq && !eof; ++i) { int rc; rc = getc(ifP); if (rc == EOF) eof = true; else { char const chr = rc; if (chr == ')') { gotEscSeq = true; objstr[i] = '\0'; } else objstr[i] = chr; } } *unclosedP = !gotEscSeq; } typedef struct { unsigned int capacity; SkeletonObject ** skeletonPList; unsigned int nSkeleton; } SkeletonBuffer; static void SkeletonBuffer_init(SkeletonBuffer * const bufferP, unsigned int const capacity, SkeletonObject ** const skeletonPList) { bufferP->capacity = capacity; bufferP->skeletonPList = skeletonPList; bufferP->nSkeleton = 0; } static void SkeletonBuffer_add(SkeletonBuffer * const bufferP, SkeletonObject * const skeletonP) { if (bufferP->nSkeleton >= bufferP->capacity) pm_error("Too many skeletons. Max = %u", bufferP->capacity); bufferP->skeletonPList[bufferP->nSkeleton++] = skeletonP; } typedef struct { char data[MAX_LINE_BUF + MAX_OBJ_BUF + 16]; unsigned int length; SkeletonBuffer * skeletonBufferP; /* The buffer to which we flush. Flushing means turning all the characters currently in our buffer into a binary skeleton object here. */ } Buffer; static void Buffer_init(Buffer * const bufferP, SkeletonBuffer * const skeletonBufferP) { bufferP->skeletonBufferP = skeletonBufferP; bufferP->length = 0; } static void Buffer_flush(Buffer * const bufferP) { /*---------------------------------------------------------------------------- Flush the buffer out to a binary skeleton object. -----------------------------------------------------------------------------*/ SkeletonBuffer_add(bufferP->skeletonBufferP, newBinDataObj(bufferP->length, bufferP->data)); bufferP->length = 0; } static void Buffer_add(Buffer * const bufferP, char const newChar) { if (bufferP->length >= MAX_LINE_BUF) Buffer_flush(bufferP); assert(bufferP->length < MAX_LINE_BUF); bufferP->data[bufferP->length++] = newChar; } static void Buffer_dropFinalNewline(Buffer * const bufferP) { /*---------------------------------------------------------------------------- If the last thing in the buffer is a newline, remove it. -----------------------------------------------------------------------------*/ if (bufferP->length >= 1 && bufferP->data[bufferP->length-1] == '\n') { /* Drop finishing newline character */ --bufferP->length; } } static void addImpostorReplacementSeq(Buffer * const bufferP, const char * const seqContents) { /*---------------------------------------------------------------------------- Add to buffer *bufferP something that looks like a replacement sequence but doesn't have the proper contents (the stuff between the parentheses) to be one. For example, "#(fread x)" seqContents[] is the contents, NUL-terminated. -----------------------------------------------------------------------------*/ const char * p; Buffer_add(bufferP, escape); Buffer_add(bufferP, '('); for (p = &seqContents[0]; *p; ++p) Buffer_add(bufferP, *p); Buffer_add(bufferP, ')'); } static void readSkeletonFile(const char * const filename, unsigned int const maxskl, const char ** const errorP, unsigned int * const nSkeletonP, SkeletonObject ** const skeletonPList) { /*---------------------------------------------------------------------------- -----------------------------------------------------------------------------*/ FILE * sklfileP; SkeletonBuffer skeletonBuffer; /* A buffer for accumulating skeleton objects */ Buffer buffer; /* A buffer for accumulating binary (literal; unsubstituted) data, on its way to becoming a binary skeleton object. */ bool eof; const char * error; SkeletonBuffer_init(&skeletonBuffer, maxskl, skeletonPList); Buffer_init(&buffer, &skeletonBuffer); sklfileP = pm_openr(filename); for (eof = false, error = NULL; !eof && !error; ) { int rc; rc = getc(sklfileP); if (rc == EOF) eof = true; else { char const chr = rc; if (chr != escape) { /* Not a replacement sequence; just a literal character */ Buffer_add(&buffer, chr); } else { int rc; rc = getc(sklfileP); if (rc == EOF) { /* Not a replacement sequence, just an escape character at the end of the file. */ Buffer_add(&buffer, escape); eof = true; } else { char const chr = rc; if (chr != '(') { /* Not a replacement sequence, just a lone escape character */ Buffer_add(&buffer, escape); Buffer_add(&buffer, chr); } else { char objstr[MAX_OBJ_BUF]; bool unclosed; readThroughCloseParen(sklfileP, objstr, sizeof(objstr), &unclosed); if (unclosed) pm_asprintf(&error, "Unclosed parentheses " "in #() escape sequence"); else { SkeletonObject * const skeletonP = newSkeletonFromReplString(objstr); if (skeletonP) { Buffer_flush(&buffer); SkeletonBuffer_add(&skeletonBuffer, skeletonP); } else addImpostorReplacementSeq(&buffer, objstr); } } } } } } if (!error) { Buffer_dropFinalNewline(&buffer); Buffer_flush(&buffer); } *errorP = error; *nSkeletonP = skeletonBuffer.nSkeleton; fclose(sklfileP); } static void convertIt(FILE * const ifP, FILE * const ofP, SkeletonObject ** const bodySkeletonPList, unsigned int const bodyNskl, SkeletonObject ** const headSkeletonPList, unsigned int const headNskl, SkeletonObject ** const tailSkeletonPList, unsigned int const tailNskl) { pixel * pixelrow; pixval maxval; double dmaxval; int rows, cols; int format; unsigned int row; ppm_readppminit(ifP, &cols, &rows, &maxval, &format); pixelrow = ppm_allocrow(cols); dmaxval = (double)maxval; /* Write header */ writeText(ofP, headNskl, headSkeletonPList, cols, rows , 0, 0, 0.0, 0.0, 0.0); /* Write raster */ for (row = 0; row < rows; ++row) { unsigned int col; ppm_readppmrow(ifP, pixelrow, cols, maxval, format); for (col = 0; col < cols; ++col) { pixel const thisPixel = pixelrow[col]; writeText(ofP, bodyNskl, bodySkeletonPList, cols, rows, col, row, PPM_GETR(thisPixel)/dmaxval, PPM_GETG(thisPixel)/dmaxval, PPM_GETB(thisPixel)/dmaxval); } } /* Write trailer */ writeText(ofP, tailNskl, tailSkeletonPList, cols, rows, 0, 0, 0.0, 0.0, 0.0); } int main(int argc, const char ** argv) { struct CmdlineInfo cmdline; unsigned int headNskl, bodyNskl, tailNskl; SkeletonObject * headSkeletonPList[MAX_SKL_HEAD_OBJ]; SkeletonObject * bodySkeletonPList[MAX_SKL_BODY_OBJ]; SkeletonObject * tailSkeletonPList[MAX_SKL_TAIL_OBJ]; FILE * ifP; const char * error; pm_proginit(&argc, argv); parseCommandLine(argc, argv, &cmdline); ifP = pm_openr(cmdline.inputFileName); readSkeletonFile(cmdline.bodySklFileName, ARRAY_SIZE(bodySkeletonPList), &error, &bodyNskl, bodySkeletonPList); if (error) pm_error("Invalid body skeleton file '%s'. %s", cmdline.bodySklFileName, error); if (cmdline.hd) { readSkeletonFile(cmdline.hd, ARRAY_SIZE(headSkeletonPList), &error, &headNskl, headSkeletonPList); if (error) pm_error("Invalid head skeleton file '%s'. %s", cmdline.hd, error); } else headNskl = 0; if (cmdline.tl) { readSkeletonFile(cmdline.tl, ARRAY_SIZE(tailSkeletonPList), &error, &tailNskl, tailSkeletonPList); if (error) pm_error("Invalid tail skeleton file '%s'. %s", cmdline.tl, error); } else tailNskl = 0; if (cmdline.debug) dumpAllSkeleton(bodySkeletonPList, bodyNskl, headSkeletonPList, headNskl, tailSkeletonPList, tailNskl); convertIt(ifP, stdout, bodySkeletonPList, bodyNskl, headSkeletonPList, headNskl, tailSkeletonPList, tailNskl); pm_close(ifP); return 0; }