/*************************************************************************** * Routines to grab the parameters from the command line : * * All the routines except the main one, starts with GA (Get Arguments) to * * prevent from names conflicts. * * It is assumed in these routine that any pointer, for any type has the * * same length (i.e. length of int pointer is equal to char pointer etc.) * * * * The following routines are available in this module: * * 1. int GAGetArgs(argc, argv, CtrlStr, Variables...) * * where argc, argv as received on entry. * * CtrlStr is the contrl string (see below) * * Variables are all the variables to be set according to CtrlStr. * * Note that all the variables MUST be transfered by address. * * return 0 on correct parsing, otherwise error number (see GetArg.h). * * 2. GAPrintHowTo(CtrlStr) * * Print the control string to stderr, in the correct format needed. * * This feature is very useful in case of error during GetArgs parsing. * * Chars equal to SPACE_CHAR are not printed (regular spaces are NOT * * allowed, and so using SPACE_CHAR you can create space in PrintHowTo). * * 3. GAPrintErrMsg(Error) * * Print the error to stderr, according to Error (usually returned by * * GAGetArgs). * * * * CtrlStr format: * * The control string passed to GetArgs controls the way argv (argc) are * * parsed. Each entry in this string must not have any spaces in it. The * * First Entry is the name of the program which is usually ignored except * * when GAPrintHowTo is called. All the other entries (except the last one * * which we will come back to it later) must have the following format: * * 1. One letter which sets the option letter. * * 2. '!' or '%' to determines if this option is really optional ('%') or * * it must exists ('!')... * * 3. '-' allways. * * 4. Alpha numeric string, usually ignored, but used by GAPrintHowTo to * * print the meaning of this input. * * 5. Sequences starts with '!' or '%'. Again if '!' then this sequence * * must exists (only if its option flag is given of course), and if '%' * * it is optional. Each sequence will continue with one or two * * characters which defines the kind of the input: * * a. d, x, o, u - integer is expected (decimal, hex, octal base or * * unsigned). * * b. D, X, O, U - long integer is expected (same as above). * * c. f - float number is expected. * * d. F - double number is expected. * * e. s - string is expected. * * f. *? - any number of '?' kind (d, x, o, u, D, X, O, U, f, F, s) * * will match this one. If '?' is numeric, it scans until * * none numeric input is given. If '?' is 's' then it scans * * up to the next option or end of argv. * * * * If the last parameter given in the CtrlStr, is not an option (i.e. the * * second char is not in ['!', '%'] and the third one is not '-'), all what * * remained from argv is linked to it. * * * * The variables passed to GAGetArgs (starting from 4th parameter) MUST * * match the order of the CtrlStr: * * For each option, one integer address must be passed. This integer must * * initialized by 0. If that option is given in the command line, it will * * be set to one. * * In addition, the sequences that might follow an option require the * * following parameters to pass: * * 1. d, x, o, u - pointer to integer (int *). * * 2. D, X, O, U - pointer to long (long *). * * 3. f - pointer to float (float *). * * 4. F - pointer to double (double *). * * 5. s - pointer to char (char *). NO allocation is needed! * * 6. *? - TWO variables are passed for each wild request. the first * * one is (address of) integer, and it will return number of * * parameters actually matched this sequence, and the second * * one is a pointer to pointer to ? (? **), and will return an * * address to a block of pointers to ? kind, terminated with * * NULL pointer. NO pre-allocation is needed. * * note that these two variables are pretty like the argv/argc * * pair... * * * * Examples: * * * * "Example1 i%-OneInteger!d s%-Strings!*s j%- k!-Float!f Files" * * Will match: Example1 -i 77 -s String1 String2 String3 -k 88.2 File1 File2* * or match: Example1 -s String1 -k 88.3 -i 999 -j * * but not: Example1 -i 77 78 (option i expects one integer, k must be). * * Note the option k must exists, and that the order of the options is not * * not important. In the first examples File1 & File2 will match the Files * * in the command line. * * A call to GAPrintHowTo with this CtrlStr will print to stderr: * * Example1 [-i OneIngeter] [-s Strings...] [-j] -k Float Files... * * * * Notes: * * * * 1. This module assumes that all the pointers to all kind of data types * * have the same length and format, i.e. sizeof(int *) == sizeof(char *).* * * * Gershon Elber Ver 0.2 Mar 88 * **************************************************************************** * History: * * 11 Mar 88 - Version 1.0 by Gershon Elber. * ***************************************************************************/ #ifdef __MSDOS__ #include #include #endif /* __MSDOS__ */ #ifdef USE_VARARGS #include #endif /* USE_VARARGS */ #include #include #include "getarg.h" #define MYMALLOC /* If no "MyAlloc" routine elsewhere define this. */ #define MAX_PARAM 100 /* maximum number of parameters allowed. */ #define CTRL_STR_MAX_LEN 1024 #define SPACE_CHAR '|' /* The character not to print using HowTo. */ #ifndef TRUE #define TRUE -1 #define FALSE 0 #endif /* TRUE */ #define ARG_OK 0 #define ISSPACE(x) ((x) <= ' ') /* Not conventional - but works fine! */ /* The two characters '%' and '!' are used in the control string: */ #define ISCTRLCHAR(x) (((x) == '%') || ((x) == '!')) static char *GAErrorToken;/* On error code, ErrorToken is set to point on it.*/ static int GATestAllSatis(char *CtrlStrCopy, char *CtrlStr, int *argc, char ***argv, int *Parameters[MAX_PARAM], int *ParamCount); static int GAUpdateParameters(int *Parameters[], int *ParamCount, char *Option, char *CtrlStrCopy, char *CtrlStr, int *argc, char ***argv); static int GAGetParmeters(int *Parameters[], int *ParamCount, char *CtrlStrCopy , char *Option, int *argc, char ***argv); static int GAGetMultiParmeters(int *Parameters[], int *ParamCount, char *CtrlStrCopy, int *argc, char ***argv); static void GASetParamCount(char *CtrlStr, int Max, int *ParamCount); static void GAByteCopy(char *Dst, char *Src, unsigned n); static int GAOptionExists(int argc, char **argv); #ifdef MYMALLOC static char *MyMalloc(unsigned size); #endif /* MYMALLOC */ /*************************************************************************** * Routine to access the command line argument and interpret them: * * Return ARG_OK (0) is case of succesfull parsing, error code else... * ***************************************************************************/ #ifdef USE_VARARGS int GAGetArgs(int va_alist, ...) { va_list ap; int argc, i, Error = FALSE, ParamCount = 0, *Parameters[MAX_PARAM]; /* Save here parameter addresses. */ char **argv, *CtrlStr, *Option, CtrlStrCopy[CTRL_STR_MAX_LEN]; va_start(ap); argc = va_arg(ap, int); argv = va_arg(ap, char **); CtrlStr = va_arg(ap, char *); va_end(ap); strcpy(CtrlStrCopy, CtrlStr); /* Using base address of parameters we access other parameters addr: */ /* Note that me (for sure!) samples data beyond the current function */ /* frame, but we accesson these set address only by demand. */ for (i = 1; i <= MAX_PARAM; i++) Parameters[i-1] = va_arg(ap, int *); #else int GAGetArgs(int argc, char **argv, char *CtrlStr, ...) { int i, Error = FALSE, ParamCount = 0, *Parameters[MAX_PARAM]; /* Save here parameter addresses. */ char *Option, CtrlStrCopy[CTRL_STR_MAX_LEN]; strcpy(CtrlStrCopy, CtrlStr); /* Using base address of parameters we access other parameters addr: */ /* Note that me (for sure!) samples data beyond the current function */ /* frame, but we accesson these set address only by demand. */ for (i = 1; i <= MAX_PARAM; i++) Parameters[i-1] = (int *) *(i + &CtrlStr); #endif /* USE_VARARG */ --argc; argv++; /* Skip the program name (first in argv/c list). */ while (argc >= 0) { if (!GAOptionExists(argc, argv)) break; /* The loop. */ argc--; Option = *argv++; if ((Error = GAUpdateParameters(Parameters, &ParamCount, Option, CtrlStrCopy, CtrlStr, &argc, &argv)) != FALSE) return Error; } /* Check for results and update trail of command line: */ return GATestAllSatis(CtrlStrCopy, CtrlStr, &argc, &argv, Parameters, &ParamCount); } /*************************************************************************** * Routine to search for unsatisfied flags - simply scan the list for !- * * sequence. Before this scan, this routine updates the rest of the command * * line into the last two parameters if it is requested by the CtrlStr * * (last item in CtrlStr is NOT an option). * * Return ARG_OK if all satisfied, CMD_ERR_AllSatis error else. * ***************************************************************************/ static int GATestAllSatis(char *CtrlStrCopy, char *CtrlStr, int *argc, char ***argv, int *Parameters[MAX_PARAM], int *ParamCount) { int i; static char *LocalToken = NULL; /* If LocalToken is not initialized - do it now. Note that this string */ /* should be writable as well so we can not assign it directly. */ if (LocalToken == NULL) { LocalToken = (char *) malloc(3); strcpy(LocalToken, "-?"); } /* Check is last item is an option. If not then copy rest of command */ /* line into it as 1. NumOfprm, 2. pointer to block of pointers. */ for (i = strlen(CtrlStr) - 1; i > 0 && !ISSPACE(CtrlStr[i]); i--); if (!ISCTRLCHAR(CtrlStr[i + 2])) { GASetParamCount(CtrlStr, i, ParamCount); /* Point in correct prm.. */ *Parameters[(*ParamCount)++] = *argc; GAByteCopy((char *) Parameters[(*ParamCount)++], (char *) argv, sizeof(char *)); } i = 0; while (++i < strlen(CtrlStrCopy)) if ((CtrlStrCopy[i] == '-') && (CtrlStrCopy[i-1] == '!')) { GAErrorToken = LocalToken; LocalToken[1] = CtrlStrCopy[i-2]; /* Set the corrent flag. */ return CMD_ERR_AllSatis; } return ARG_OK; } /*************************************************************************** * Routine to update the parameters according to the given Option: * ***************************************************************************/ static int GAUpdateParameters(int *Parameters[], int *ParamCount, char *Option, char *CtrlStrCopy, char *CtrlStr, int *argc, char ***argv) { int i, BooleanTrue = Option[2] != '-'; if (Option[0] != '-') { GAErrorToken = Option; return CMD_ERR_NotAnOpt; } i = 0; /* Scan the CtrlStrCopy for that option: */ while (i + 2 < strlen(CtrlStrCopy)) { if ((CtrlStrCopy[i] == Option[1]) && (ISCTRLCHAR(CtrlStrCopy[i + 1])) && (CtrlStrCopy[i+2] == '-')) { /* We found that option! */ break; } i++; } if (i + 2 >= strlen(CtrlStrCopy)) { GAErrorToken = Option; return CMD_ERR_NoSuchOpt; } /* If we are here, then we found that option in CtrlStr - Strip it off: */ CtrlStrCopy[i] = CtrlStrCopy[i + 1] = CtrlStrCopy[i + 2] = (char) ' '; GASetParamCount(CtrlStr, i, ParamCount);/*Set it to point in correct prm.*/ i += 3; /* Set boolean flag for that option. */ *Parameters[(*ParamCount)++] = BooleanTrue; if (ISSPACE(CtrlStrCopy[i])) return ARG_OK; /* Only a boolean flag is needed. */ /* Skip the text between the boolean option and data follows: */ while (!ISCTRLCHAR(CtrlStrCopy[i])) i++; /* Get the parameters and return the appropriete return code: */ return GAGetParmeters(Parameters, ParamCount, &CtrlStrCopy[i], Option, argc, argv); } /*************************************************************************** * Routine to get parameters according to the CtrlStr given from argv/c : * ***************************************************************************/ static int GAGetParmeters(int *Parameters[], int *ParamCount, char *CtrlStrCopy , char *Option, int *argc, char ***argv) { int i = 0, ScanRes; while (!(ISSPACE(CtrlStrCopy[i]))) { switch (CtrlStrCopy[i+1]) { case 'd': /* Get signed integers. */ ScanRes = sscanf(*((*argv)++), "%d", (int *) Parameters[(*ParamCount)++]); break; case 'u': /* Get unsigned integers. */ ScanRes = sscanf(*((*argv)++), "%u", (unsigned *) Parameters[(*ParamCount)++]); break; case 'x': /* Get hex integers. */ ScanRes = sscanf(*((*argv)++), "%x", (int *) Parameters[(*ParamCount)++]); break; case 'o': /* Get octal integers. */ ScanRes = sscanf(*((*argv)++), "%o", (int *) Parameters[(*ParamCount)++]); break; case 'D': /* Get signed long integers. */ ScanRes = sscanf(*((*argv)++), "%ld", (long *) Parameters[(*ParamCount)++]); break; case 'U': /* Get unsigned long integers. */ ScanRes = sscanf(*((*argv)++), "%lu", (unsigned long *) Parameters[(*ParamCount)++]); break; case 'X': /* Get hex long integers. */ ScanRes = sscanf(*((*argv)++), "%lx", (long *) Parameters[(*ParamCount)++]); break; case 'O': /* Get octal long integers. */ ScanRes = sscanf(*((*argv)++), "%lo", (long *) Parameters[(*ParamCount)++]); break; case 'f': /* Get float number. */ ScanRes = sscanf(*((*argv)++), "%f", (float *) Parameters[(*ParamCount)++]); case 'F': /* Get double float number. */ ScanRes = sscanf(*((*argv)++), "%lf", (double *) Parameters[(*ParamCount)++]); break; case 's': /* It as a string. */ ScanRes = 1; /* Allways O.K. */ GAByteCopy((char *) Parameters[(*ParamCount)++], (char *) ((*argv)++), sizeof(char *)); break; case '*': /* Get few parameters into one: */ ScanRes = GAGetMultiParmeters(Parameters, ParamCount, &CtrlStrCopy[i], argc, argv); if ((ScanRes == 0) && (CtrlStrCopy[i] == '!')) { GAErrorToken = Option; return CMD_ERR_WildEmpty; } break; default: ScanRes = 0; /* Make optimizer warning silent. */ } /* If reading fails and this number is a must (!) then error: */ if ((ScanRes == 0) && (CtrlStrCopy[i] == '!')) { GAErrorToken = Option; return CMD_ERR_NumRead; } if (CtrlStrCopy[i+1] != '*') { (*argc)--; /* Everything is OK - update to next parameter: */ i += 2; /* Skip to next parameter (if any). */ } else i += 3; /* Skip the '*' also! */ } return ARG_OK; } /*************************************************************************** * Routine to get few parameters into one pointer such that the returned * * pointer actually points on a block of pointers to the parameters... * * For example *F means a pointer to pointers on floats. * * Returns number of parameters actually read. * * This routine assumes that all pointers (on any kind of scalar) has the * * same size (and the union below is totally ovelapped bteween dif. arrays) * ***************************************************************************/ static int GAGetMultiParmeters(int *Parameters[], int *ParamCount, char *CtrlStrCopy, int *argc, char ***argv) { int i = 0, ScanRes, NumOfPrm = 0, **Pmain, **Ptemp; union TmpArray { /* Save here the temporary data before copying it to */ int *IntArray[MAX_PARAM]; /* the returned pointer block. */ long *LngArray[MAX_PARAM]; float *FltArray[MAX_PARAM]; double *DblArray[MAX_PARAM]; char *ChrArray[MAX_PARAM]; } TmpArray; do { switch(CtrlStrCopy[2]) { /* CtrlStr == '!*?' or '%*?' where ? is. */ case 'd': /* Format to read the parameters: */ TmpArray.IntArray[NumOfPrm] = (int *) MyMalloc(sizeof(int)); ScanRes = sscanf(*((*argv)++), "%d", (int *) TmpArray.IntArray[NumOfPrm++]); break; case 'u': TmpArray.IntArray[NumOfPrm] = (int *) MyMalloc(sizeof(int)); ScanRes = sscanf(*((*argv)++), "%u", (unsigned int *) TmpArray.IntArray[NumOfPrm++]); break; case 'o': TmpArray.IntArray[NumOfPrm] = (int *) MyMalloc(sizeof(int)); ScanRes = sscanf(*((*argv)++), "%o", (int *) TmpArray.IntArray[NumOfPrm++]); break; case 'x': TmpArray.IntArray[NumOfPrm] = (int *) MyMalloc(sizeof(int)); ScanRes = sscanf(*((*argv)++), "%x", (int *) TmpArray.IntArray[NumOfPrm++]); break; case 'D': TmpArray.LngArray[NumOfPrm] = (long *) MyMalloc(sizeof(long)); ScanRes = sscanf(*((*argv)++), "%ld", (long *) TmpArray.IntArray[NumOfPrm++]); break; case 'U': TmpArray.LngArray[NumOfPrm] = (long *) MyMalloc(sizeof(long)); ScanRes = sscanf(*((*argv)++), "%lu", (unsigned long *) TmpArray.IntArray[NumOfPrm++]); break; case 'O': TmpArray.LngArray[NumOfPrm] = (long *) MyMalloc(sizeof(long)); ScanRes = sscanf(*((*argv)++), "%lo", (long *) TmpArray.IntArray[NumOfPrm++]); break; case 'X': TmpArray.LngArray[NumOfPrm] = (long *) MyMalloc(sizeof(long)); ScanRes = sscanf(*((*argv)++), "%lx", (long *) TmpArray.IntArray[NumOfPrm++]); break; case 'f': TmpArray.FltArray[NumOfPrm] = (float *) MyMalloc(sizeof(float)); ScanRes = sscanf(*((*argv)++), "%f", (float *) TmpArray.LngArray[NumOfPrm++]); break; case 'F': TmpArray.DblArray[NumOfPrm] = (double *) MyMalloc(sizeof(double)); ScanRes = sscanf(*((*argv)++), "%lf", (double *) TmpArray.LngArray[NumOfPrm++]); break; case 's': while ((*argc) && ((**argv)[0] != '-')) { TmpArray.ChrArray[NumOfPrm++] = *((*argv)++); (*argc)--; } ScanRes = 0; /* Force quit from do - loop. */ NumOfPrm++; /* Updated again immediately after loop! */ (*argv)++; /* "" */ break; default: ScanRes = 0; /* Make optimizer warning silent. */ } (*argc)--; } while (ScanRes == 1); /* Exactly one parameter was read. */ (*argv)--; NumOfPrm--; (*argc)++; /* Now allocate the block with the exact size, and set it: */ Ptemp = Pmain = (int **) MyMalloc((unsigned) (NumOfPrm+1) * sizeof(int *)); /* And here we use the assumption that all pointers are the same: */ for (i = 0; i < NumOfPrm; i++) *Ptemp++ = TmpArray.IntArray[i]; *Ptemp = NULL; /* Close the block with NULL pointer. */ /* That it save the number of parameters read as first parameter to */ /* return and the pointer to the block as second, and return: */ *Parameters[(*ParamCount)++] = NumOfPrm; GAByteCopy((char *) Parameters[(*ParamCount)++], (char *) &Pmain, sizeof(char *)); return NumOfPrm; } /*************************************************************************** * Routine to scan the CtrlStr, upto Max and count the number of parameters * * to that point: * * 1. Each option is counted as one parameter - boolean variable (int) * * 2. Within an option, each %? or !? is counted once - pointer to something* * 3. Within an option, %*? or !*? is counted twice - one for item count * * and one for pointer to block pointers. * * Note ALL variables are passed by address and so of fixed size (address). * ***************************************************************************/ static void GASetParamCount(char *CtrlStr, int Max, int *ParamCount) { int i; *ParamCount = 0; for (i = 0; i < Max; i++) if (ISCTRLCHAR(CtrlStr[i])) { if (CtrlStr[i+1] == '*') *ParamCount += 2; else (*ParamCount)++; } } /*************************************************************************** * Routine to copy exactly n bytes from Src to Dst. Note system library * * routine strncpy should do the same, but it stops on NULL char ! * ***************************************************************************/ static void GAByteCopy(char *Dst, char *Src, unsigned n) { while (n--) *(Dst++) = *(Src++); } /*************************************************************************** * Routine to check if more option (i.e. first char == '-') exists in the * * given list argc, argv: * ***************************************************************************/ static int GAOptionExists(int argc, char **argv) { while (argc--) if ((*argv++)[0] == '-') return TRUE; return FALSE; } /*************************************************************************** * Routine to print some error messages, for this module: * ***************************************************************************/ void GAPrintErrMsg(int Error) { fprintf(stderr, "Error in command line parsing - "); switch (Error) { case 0:; fprintf(stderr, "Undefined error"); break; case CMD_ERR_NotAnOpt: fprintf(stderr, "None option Found"); break; case CMD_ERR_NoSuchOpt: fprintf(stderr, "Undefined option Found"); break; case CMD_ERR_WildEmpty: fprintf(stderr, "Empty input for '!*?' seq."); break; case CMD_ERR_NumRead: fprintf(stderr, "Failed on reading number"); break; case CMD_ERR_AllSatis: fprintf(stderr, "Fail to satisfy"); break; } fprintf(stderr, " - '%s'.\n", GAErrorToken); } /*************************************************************************** * Routine to print correct format of command line allowed: * ***************************************************************************/ void GAPrintHowTo(char *CtrlStr) { int i = 0, SpaceFlag; fprintf(stderr, "Usage: "); /* Print program name - first word in ctrl. str. (optional): */ while (!(ISSPACE(CtrlStr[i])) && (!ISCTRLCHAR(CtrlStr[i+1]))) fprintf(stderr, "%c", CtrlStr[i++]); while (i < strlen(CtrlStr)) { while ((ISSPACE(CtrlStr[i])) && (i < strlen(CtrlStr))) i++; switch (CtrlStr[i+1]) { case '%': fprintf(stderr, " [-%c", CtrlStr[i++]); i += 2; /* Skip the '%-' or '!- after the char! */ SpaceFlag = TRUE; while (!ISCTRLCHAR(CtrlStr[i]) && (i < strlen(CtrlStr)) && (!ISSPACE(CtrlStr[i]))) if (SpaceFlag) { if (CtrlStr[i++] == SPACE_CHAR) fprintf(stderr, " "); else fprintf(stderr, " %c", CtrlStr[i-1]); SpaceFlag = FALSE; } else if (CtrlStr[i++] == SPACE_CHAR) fprintf(stderr, " "); else fprintf(stderr, "%c", CtrlStr[i-1]); while (!ISSPACE(CtrlStr[i]) && (i < strlen(CtrlStr))) { if (CtrlStr[i] == '*') fprintf(stderr, "..."); i++; /* Skip the rest of it. */ } fprintf(stderr, "]"); break; case '!': fprintf(stderr, " -%c", CtrlStr[i++]); i += 2; /* Skip the '%-' or '!- after the char! */ SpaceFlag = TRUE; while (!ISCTRLCHAR(CtrlStr[i]) && (i < strlen(CtrlStr)) && (!ISSPACE(CtrlStr[i]))) if (SpaceFlag) { if (CtrlStr[i++] == SPACE_CHAR) fprintf(stderr, " "); else fprintf(stderr, " %c", CtrlStr[i-1]); SpaceFlag = FALSE; } else if (CtrlStr[i++] == SPACE_CHAR) fprintf(stderr, " "); else fprintf(stderr, "%c", CtrlStr[i-1]); while (!ISSPACE(CtrlStr[i]) && (i < strlen(CtrlStr))) { if (CtrlStr[i] == '*') fprintf(stderr, "..."); i++; /* Skip the rest of it. */ } break; default: /* Not checked, but must be last one! */ fprintf(stderr, " "); while (!ISSPACE(CtrlStr[i]) && (i < strlen(CtrlStr)) && !ISCTRLCHAR(CtrlStr[i])) fprintf(stderr, "%c", CtrlStr[i++]); fprintf(stderr, "\n"); return; } } fprintf(stderr, "\n"); } #ifdef MYMALLOC /*************************************************************************** * My Routine to allocate dynamic memory. All program requests must call * * this routine (no direct call to malloc). Dies if no memory. * ***************************************************************************/ static char *MyMalloc(unsigned size) { char *p; if ((p = (char *) malloc(size)) != NULL) return p; fprintf(stderr, "Not enough memory, exit.\n"); exit(2); return NULL; /* Makes warning silent. */ } #endif /* MYMALLOC */