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- /******************************************************************************
- * Bzr_Read.c - Bezier handling routines - read from file. *
- *******************************************************************************
- * Written by Gershon Elber, Mar. 90. *
- ******************************************************************************/
-
- #include <ctype.h>
- #include <stdio.h>
- #include <string.h>
- #include "prsr_loc.h"
-
- /*****************************************************************************
- * DESCRIPTION: M
- * Reads from a file Bezier curve(s). M
- * If error is detected in reading the file, ErrStr is set to a string M
- * describing the error and Line to the line it occured in file. M
- * If no error is detected *ErrStr = NULL. M
- * *
- * PARAMETERS: M
- * FileName: To read the Bezier curve from. M
- * ErrStr: Will be initialized if an error has occured. M
- * ErrLine: Line number in file FileName of the error, if occured. M
- * *
- * RETURN VALUE: M
- * CagdCrvStruct *: The read curve, or NULL if an error occured. M
- * *
- * KEYWORDS: M
- * BzrCrvReadFromFile, files, read M
- *****************************************************************************/
- CagdCrvStruct *BzrCrvReadFromFile(char *FileName, char **ErrStr, int *ErrLine)
- {
- int Handler;
- FILE *f;
- char StringToken[LINE_LEN];
- CagdCrvStruct *Crv,
- *CrvTail = NULL,
- *CrvList = NULL;
-
- if ((f = fopen(FileName, "r")) == NULL) {
- *ErrStr = "File not found";
- *ErrLine = 0;
- return NULL;
- }
- Handler = IritPrsrOpenStreamFromFile(f, TRUE,
- IritPrsrSenseBinaryFile(FileName),
- FALSE);
-
- while (_IPGetToken(Handler, StringToken) == IP_TOKEN_OPEN_PAREN) {
- _IPUnGetToken(Handler, StringToken);
- Crv = BzrCrvReadFromFile2(Handler, FALSE, ErrStr, ErrLine);
-
- if (CrvList == NULL)
- CrvList = CrvTail = Crv;
- else {
- CrvTail -> Pnext = Crv;
- CrvTail = Crv;
- }
- }
-
- IritPrsrCloseStream(Handler, TRUE);
-
- return CrvList;
- }
-
- /*****************************************************************************
- * DESCRIPTION: M
- * Reads from a file a Bezier curve. M
- * If NameWasRead is TRUE, it is assumed prefix "[CURVE BEZIER" has M
- * already been read. This is useful for a global parser which invokes this M
- * routine to read from a file several times as a parent controller. M
- * For exactly this reason, the given file descriptor is NOT closed in the M
- * end. M
- * If error is found in reading the file, ErrStr is set to a string M
- * describing it and ErrLine to line it occured in file relative to begining M
- * of curve. M
- * If no error is detected *ErrStr is set to NULL. M
- * *
- * PARAMETERS: M
- * Handler: A handler to the open stream. M
- * NameWasRead: TRUE if "[CURVE BEZIER" hasbeen read, FALSE otherwise. M
- * ErrStr: Will be initialized if an error has occured. M
- * ErrLine: Line number in file FileName of the error, if occured. M
- * *
- * RETURN VALUE: M
- * CagdCrvStruct *: The read curve, or NULL if an error occured. M
- * *
- * KEYWORDS: M
- * BzrCrvReadFromFile2, files, read, stream M
- *****************************************************************************/
- CagdCrvStruct *BzrCrvReadFromFile2(int Handler,
- CagdBType NameWasRead,
- char **ErrStr,
- int *ErrLine)
- {
- CagdPointType PType;
- IPTokenType Token;
- int i, j, Length, MaxCoord;
- char StringToken[LINE_LEN];
- CagdCrvStruct *NewCrv;
-
- if (!NameWasRead) {
- while ((Token = _IPGetToken(Handler, StringToken)) != IP_TOKEN_EOF &&
- Token != IP_TOKEN_OPEN_PAREN);
-
- /* We found beginning of definition - read one: */
- if (_IPGetToken(Handler, StringToken) != IP_TOKEN_CURVE ||
- _IPGetToken(Handler, StringToken) != IP_TOKEN_BEZIER) {
- *ErrStr = "CURVE BEZIER key words expected";
- *ErrLine = _IPStream[Handler].LineNum;
- return NULL;
- }
- }
-
- if ((Token = _IPGetToken(Handler, StringToken)) == IP_TOKEN_OPEN_PAREN) {
- if ((*ErrStr = _IPGetCurveAttributes(Handler)) != NULL) {
- *ErrStr = "\"[\" expected";
- *ErrLine = _IPStream[Handler].LineNum;
- return NULL;
- }
- }
- else
- _IPUnGetToken(Handler, StringToken);
-
- if ((Token = _IPGetToken(Handler, StringToken)) != IP_TOKEN_OTHER ||
- sscanf(StringToken, "%d", &Length) != 1) {
- *ErrStr = "BEZIER Number of points expected";
- *ErrLine = _IPStream[Handler].LineNum;
- return NULL;
- }
-
- Token = _IPGetToken(Handler, StringToken);
- if (!IP_IS_TOKEN_POINT(Token) ||
- strlen(StringToken) != 2 ||
- (StringToken[0] != 'E' && StringToken[0] != 'P') ||
- !isdigit(StringToken[1]) ||
- atoi(&StringToken[1]) > CAGD_MAX_PT_COORD) {
- *ErrStr = "BEZIER Point type expected";
- *ErrLine = _IPStream[Handler].LineNum;
- return NULL;
- }
-
- PType = CAGD_MAKE_PT_TYPE(StringToken[0] == 'P', atoi(&StringToken[1]));
-
- NewCrv = BzrCrvNew(Length, PType);
-
- /* Read the points themselves: */
- MaxCoord = CAGD_NUM_OF_PT_COORD(PType);
- for (i = 0; i < Length; i++) {
- if ((Token = _IPGetToken(Handler, StringToken)) !=
- IP_TOKEN_OPEN_PAREN) {
- *ErrStr = "\"[\" expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdCrvFree(NewCrv);
- return NULL;
- }
- if (CAGD_IS_RATIONAL_PT(PType)) {
- if ((Token = _IPGetToken(Handler, StringToken)) !=
- IP_TOKEN_OTHER ||
- sscanf(StringToken, IP_FLOAT_READ,
- &NewCrv -> Points[0][i]) != 1) {
- *ErrStr = "Numeric data expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdCrvFree(NewCrv);
- return NULL;
- }
- }
- for (j = 1; j <= MaxCoord; j++) {
- if ((Token = _IPGetToken(Handler, StringToken)) !=
- IP_TOKEN_OTHER ||
- sscanf(StringToken, IP_FLOAT_READ,
- &NewCrv -> Points[j][i]) != 1) {
- *ErrStr = "Numeric data expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdCrvFree(NewCrv);
- return NULL;
- }
- }
- if ((Token = _IPGetToken(Handler, StringToken)) !=
- IP_TOKEN_CLOSE_PAREN) {
- *ErrStr = "\"]\" expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdCrvFree(NewCrv);
- return NULL;
- }
- }
- if ((Token = _IPGetToken(Handler, StringToken)) != IP_TOKEN_CLOSE_PAREN) {
- *ErrStr = "\"]\" expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdCrvFree(NewCrv);
- return NULL;
- }
-
- *ErrLine = _IPStream[Handler].LineNum;
- *ErrStr = NULL;
-
- return NewCrv;
- }
-
- /*****************************************************************************
- * DESCRIPTION: M
- * Reads from a file Bezier surface(s). M
- * If error is detected in reading the file, ErrStr is set to a string M
- * describing the error and Line to the line it occured in file. M
- * If no error is detected *ErrStr = NULL. M
- * *
- * PARAMETERS: M
- * FileName: To read the Bezier surface from. M
- * ErrStr: Will be initialized if an error has occured. M
- * ErrLine: Line number in file FileName of the error, if occured. M
- * *
- * RETURN VALUE: M
- * CagdSrfStruct *: The read surface, or NULL if an error occured. M
- * *
- * KEYWORDS: M
- * BzrSrfReadFromFile, files, read M
- *****************************************************************************/
- CagdSrfStruct *BzrSrfReadFromFile(char *FileName, char **ErrStr, int *ErrLine)
- {
- int Handler;
- FILE *f;
- char StringToken[LINE_LEN];
- CagdSrfStruct *Srf,
- *SrfTail = NULL,
- *SrfList = NULL;
-
- if ((f = fopen(FileName, "r")) == NULL) {
- *ErrStr = "File not found";
- *ErrLine = 0;
- return NULL;
- }
- Handler = IritPrsrOpenStreamFromFile(f, TRUE,
- IritPrsrSenseBinaryFile(FileName),
- FALSE);
-
- while (_IPGetToken(Handler, StringToken) == IP_TOKEN_OPEN_PAREN) {
- _IPUnGetToken(Handler, StringToken);
- Srf = BzrSrfReadFromFile2(Handler, FALSE, ErrStr, ErrLine);
-
- if (SrfList == NULL)
- SrfList = SrfTail = Srf;
- else {
- SrfTail -> Pnext = Srf;
- SrfTail = Srf;
- }
- }
-
- IritPrsrCloseStream(Handler, TRUE);
-
- return SrfList;
- }
-
- /*****************************************************************************
- * DESCRIPTION: M
- * Reads from a file a Bezier surface. M
- * If NameWasRead is TRUE, it is assumed prefix "[SURFACE BEZIER" has M
- * already been read. This is useful for a global parser which invokes this M
- * routine to read from a file several times as a parent controller. M
- * For exactly this reason, the given file descriptor is NOT closed in the M
- * end. M
- * If error is found in reading the file, ErrStr is set to a string M
- * describing it and ErrLine to line it occured in file relative to begining M
- * of surface. M
- * If no error is detected *ErrStr is set to NULL. M
- * *
- * PARAMETERS: M
- * Handler: A handler to the open stream. M
- * NameWasRead: TRUE if "[SURFACE BEZIER" hasbeen read, FALSE otherwise. M
- * ErrStr: Will be initialized if an error has occured. M
- * ErrLine: Line number in file FileName of the error, if occured. M
- * *
- * RETURN VALUE: M
- * CagdSrfStruct *: The read surface, or NULL if an error occured. M
- * *
- * KEYWORDS: M
- * BzrSrfReadFromFile2, files, read, stream M
- *****************************************************************************/
- CagdSrfStruct *BzrSrfReadFromFile2(int Handler,
- CagdBType NameWasRead,
- char **ErrStr,
- int *ErrLine)
- {
- CagdPointType PType;
- IPTokenType Token;
- int i, j, ULength, VLength, MaxCoord;
- char StringToken[LINE_LEN];
- CagdSrfStruct *NewSrf;
-
- if (!NameWasRead) {
- while ((Token = _IPGetToken(Handler, StringToken)) != IP_TOKEN_EOF &&
- Token != IP_TOKEN_OPEN_PAREN);
-
- /* We found beginning of definition - read one: */
- if (_IPGetToken(Handler, StringToken) != IP_TOKEN_SURFACE ||
- _IPGetToken(Handler, StringToken) != IP_TOKEN_BEZIER) {
- *ErrStr = "SURFACE BEZIER key words expected";
- *ErrLine = _IPStream[Handler].LineNum;
- return NULL;
- }
- }
-
- if ((Token = _IPGetToken(Handler, StringToken)) == IP_TOKEN_OPEN_PAREN) {
- if ((*ErrStr = _IPGetSurfaceAttributes(Handler)) != NULL) {
- *ErrStr = "\"[\" expected";
- *ErrLine = _IPStream[Handler].LineNum;
- return NULL;
- }
- }
- else
- _IPUnGetToken(Handler, StringToken);
-
- if ((Token = _IPGetToken(Handler, StringToken)) != IP_TOKEN_OTHER ||
- sscanf(StringToken, "%d", &ULength) != 1 ||
- (Token = _IPGetToken(Handler, StringToken)) != IP_TOKEN_OTHER ||
- sscanf(StringToken, "%d", &VLength) != 1) {
- *ErrStr = "BEZIER Number of points expected";
- *ErrLine = _IPStream[Handler].LineNum;
- return NULL;
- }
-
- Token = _IPGetToken(Handler, StringToken);
- if (!IP_IS_TOKEN_POINT(Token) ||
- strlen(StringToken) != 2 ||
- (StringToken[0] != 'E' && StringToken[0] != 'P') ||
- !isdigit(StringToken[1]) ||
- atoi(&StringToken[1]) > CAGD_MAX_PT_COORD) {
- *ErrStr = "BEZIER Point type expected";
- *ErrLine = _IPStream[Handler].LineNum;
- return NULL;
- }
- PType = CAGD_MAKE_PT_TYPE(StringToken[0] == 'P', atoi(&StringToken[1]));
-
- NewSrf = BzrSrfNew(ULength, VLength, PType);
-
- /* Read the points themselves: */
- MaxCoord = CAGD_NUM_OF_PT_COORD(PType);
- for (i = 0; i < ULength * VLength; i++) {
- if ((Token = _IPGetToken(Handler, StringToken)) !=
- IP_TOKEN_OPEN_PAREN) {
- *ErrStr = "\"[\" expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdSrfFree(NewSrf);
- return NULL;
- }
- if (CAGD_IS_RATIONAL_PT(PType)) {
- if ((Token = _IPGetToken(Handler, StringToken)) !=
- IP_TOKEN_OTHER ||
- sscanf(StringToken, IP_FLOAT_READ,
- &NewSrf -> Points[0][i]) != 1) {
- *ErrStr = "Numeric data expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdSrfFree(NewSrf);
- return NULL;
- }
- }
- for (j = 1; j <= MaxCoord; j++) {
- if ((Token = _IPGetToken(Handler, StringToken)) !=
- IP_TOKEN_OTHER ||
- sscanf(StringToken, IP_FLOAT_READ,
- &NewSrf -> Points[j][i]) != 1) {
- *ErrStr = "Numeric data expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdSrfFree(NewSrf);
- return NULL;
- }
- }
- if ((Token = _IPGetToken(Handler, StringToken)) !=
- IP_TOKEN_CLOSE_PAREN) {
- *ErrStr = "\"]\" expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdSrfFree(NewSrf);
- return NULL;
- }
- }
- if ((Token = _IPGetToken(Handler, StringToken)) != IP_TOKEN_CLOSE_PAREN) {
- *ErrStr = "\"]\" expected";
- *ErrLine = _IPStream[Handler].LineNum;
- CagdSrfFree(NewSrf);
- return NULL;
- }
-
- *ErrStr = NULL;
- *ErrLine = _IPStream[Handler].LineNum;
-
- return NewSrf;
- }
-