| 1 | /*********************************************************************************************\r |
| 2 | * ibm1130_fmt.c : interpret tabs in 1130 Assembler or Fortran source\r |
| 3 | * Bob Flanders\r |
| 4 | * -------------------------------------------------------------------------------------------\r |
| 5 | *\r |
| 6 | * These routines are used by ibm1130_cr.c when the user has indicated\r |
| 7 | * that the input text is formatted with tabs. Input lines are edited\r |
| 8 | * into the appropriate column format. Three edit modes are recognized:\r |
| 9 | *\r |
| 10 | * Assembler mode:\r |
| 11 | * Input lines of the form\r |
| 12 | *\r |
| 13 | * [label]<whitespace>[opcode]<tab>[tag][L]<tab>[argument]\r |
| 14 | *\r |
| 15 | * are rearranged so that the input fields are placed in the appropriate columns\r |
| 16 | *\r |
| 17 | * The label must start on the first character of the line. If there is no label, \r |
| 18 | * the first character(s) before the opcode must be whitespace. Following the opcode, there\r |
| 19 | * MUST be a tab character, followed by the format and tag. Following the format and tag \r |
| 20 | * may be exactly one whitespace character, and then starts the argument.\r |
| 21 | *\r |
| 22 | * Input lines with * in column 1 and blank lines are turned into Assembler comments,\r |
| 23 | * with the * in the Opcode field.\r |
| 24 | *\r |
| 25 | * Assembler directive lines at the beginning of the deck must be preceded by\r |
| 26 | * ! to indicate that they are not comments. For example,\r |
| 27 | *\r |
| 28 | * !*LIST\r |
| 29 | * * This is a comment\r |
| 30 | *\r |
| 31 | * Fortran mode:\r |
| 32 | * Input lines of the form\r |
| 33 | *\r |
| 34 | * [label]<tab>statement\r |
| 35 | *\r |
| 36 | * or\r |
| 37 | *\r |
| 38 | * [label]<tab>Xcontinuation\r |
| 39 | *\r |
| 40 | * where X is a non alphabetic contination character are rearranged in the\r |
| 41 | * appropriate manner:\r |
| 42 | *\r |
| 43 | * 1 2\r |
| 44 | * 12345678901234567890...\r |
| 45 | * ------------------------\r |
| 46 | * label statement\r |
| 47 | * labelXcontinuation\r |
| 48 | *\r |
| 49 | * However, you must take care that you don't end up with statement text after column 72.\r |
| 50 | *\r |
| 51 | * Input lines with * or C in column 1 are left alone (comments and directives)\r |
| 52 | *\r |
| 53 | * (The ! escape is not used before Fortran directives as before Assembler directives)\r |
| 54 | *\r |
| 55 | * Tab mode:\r |
| 56 | * Tabs are replaced with spaces. Tab settings are assumed to be eight characters wide,\r |
| 57 | * as is standard for vi, notepad, etc.\r |
| 58 | *********************************************************************************************/\r |
| 59 | \r |
| 60 | #include <stdio.h>\r |
| 61 | #include <stdlib.h>\r |
| 62 | #include <memory.h>\r |
| 63 | #include <ctype.h>\r |
| 64 | #include <string.h>\r |
| 65 | #include "ibm1130_fmt.h"\r |
| 66 | \r |
| 67 | #define MAXLINE 81 /* maximum output line size */\r |
| 68 | #define WORKSZ 256 /* size for tab work area */\r |
| 69 | #define TAGOFFSET 12 /* offset for tag field */\r |
| 70 | #define FMTOFFSET 11 /* offset for format field */\r |
| 71 | \r |
| 72 | #define MIN(a,b) ((a < b) ? a : b)\r |
| 73 | #define AMSG " with Assembler Reformat"\r |
| 74 | #define FMSG " with FORTRAN Reformat"\r |
| 75 | #define AFORMAT "%20.20s%-60.60s"," "\r |
| 76 | #define ACOMMENTFMT "%20.20s%-60.60s"," "\r |
| 77 | #define ABLANKLINE "%20.20s*"," "\r |
| 78 | #define FFORMAT "%-5.5s %-74.74s"\r |
| 79 | #define FCONTFMT "%-5.5s%-75.75s"\r |
| 80 | \r |
| 81 | char gszLabel[6]; /* work area for label */\r |
| 82 | char gszArg[MAXLINE]; /* .. argument */\r |
| 83 | char gszOutput[MAXLINE]; /* .. output */\r |
| 84 | short gaiAsmTabs[] = {7,12,15,20,25,30,35,40,45,52,0};/* tab stops for assembler */\r |
| 85 | \r |
| 86 | short gaiPlainTabs[] = {9, 17, 25, 33, 41, 49, 57, 65, 73, 0};/* tab stops for just plain tabs */\r |
| 87 | \r |
| 88 | /*\r |
| 89 | * helper routines\r |
| 90 | */\r |
| 91 | \r |
| 92 | /*************************************************\r |
| 93 | * ExpandTabs: Expand tabs to spaces\r |
| 94 | */\r |
| 95 | \r |
| 96 | char* ExpandTabs(char* p_szInbuf, /* expand tabs .. input buffer */\r |
| 97 | char* p_szOutbuf, /* .. output buffer */\r |
| 98 | short* p_aiTabs) /* .. array of tab stops (1 based) -- 0 end of array */\r |
| 99 | {\r |
| 100 | short iI, /* input position */\r |
| 101 | iO, /* output position */\r |
| 102 | iT; /* next tab stop */\r |
| 103 | \r |
| 104 | char cX; /* character to test */\r |
| 105 | \r |
| 106 | iI = 0; /* init input position */\r |
| 107 | iO = 0; /* init output position */\r |
| 108 | iT = 0; /* init tab stop */\r |
| 109 | \r |
| 110 | while ((cX = *(p_szInbuf + iI)) != 0) /* while there are characters */\r |
| 111 | {\r |
| 112 | if (cX == '\t') /* q. tab character? */\r |
| 113 | { /* a. yes .. */\r |
| 114 | while ((p_aiTabs[iT] <= iO + 1) /* search for next valid stop .. */\r |
| 115 | && (p_aiTabs[iT] != 0)) /* .. or end of table */\r |
| 116 | iT++; /* .. go to next tab */\r |
| 117 | \r |
| 118 | if (p_aiTabs[iT] != 0) /* q. end of tab array? */\r |
| 119 | { /* a. no .. */\r |
| 120 | while (iO < (p_aiTabs[iT] - 1)) /* fill to tab with blanks */\r |
| 121 | *(p_szOutbuf + iO++) = ' '; /* .. put in a blank */\r |
| 122 | \r |
| 123 | }\r |
| 124 | else /* Otherwise ... */\r |
| 125 | *(p_szOutbuf + iO++) = ' '; /* .. Translate to blank */\r |
| 126 | } \r |
| 127 | else /* Otherwise .. not tab */\r |
| 128 | *(p_szOutbuf + iO++) = cX; /* .. save the input char */\r |
| 129 | \r |
| 130 | iI++; /* next input character */\r |
| 131 | }\r |
| 132 | \r |
| 133 | *(p_szOutbuf + iO) = 0; /* end the string.. */\r |
| 134 | return p_szOutbuf; /* .. return output area addr */\r |
| 135 | }\r |
| 136 | \r |
| 137 | /*************************************************\r |
| 138 | * extract next token, modify pointer\r |
| 139 | */\r |
| 140 | \r |
| 141 | char* GetToken(char* p_szOut, /* output location */\r |
| 142 | int p_iLen, /* max output length */\r |
| 143 | char**p_pszToken) /* pointer to input token */\r |
| 144 | {\r |
| 145 | int iI; /* work integer */\r |
| 146 | char* pszX; /* work pointer */\r |
| 147 | \r |
| 148 | pszX = *p_pszToken; /* get pointer to token */\r |
| 149 | \r |
| 150 | for (iI = 0; *(pszX + iI) && (!isspace(*(pszX + iI)));) /* while not whitespace & not end */\r |
| 151 | iI++; /* .. count token length */\r |
| 152 | \r |
| 153 | memset(p_szOut, 0, p_iLen); /* zero out output area */\r |
| 154 | \r |
| 155 | if (iI > 0) /* q. any chars? */\r |
| 156 | strncpy(p_szOut, *p_pszToken, MIN(iI, p_iLen-1)); /* a. yes.. copy max of p_iLen-1 */\r |
| 157 | \r |
| 158 | *p_pszToken += iI; /* point beyond token */\r |
| 159 | return p_szOut; /* .. return token pointer */\r |
| 160 | }\r |
| 161 | \r |
| 162 | /*************************************************\r |
| 163 | * EditToAsm - convert tab-formatted text line to 1130 Assembler format\r |
| 164 | */\r |
| 165 | \r |
| 166 | char *EditToAsm (char* p_pszEdit) /* convert line to 1130 assembler */\r |
| 167 | {\r |
| 168 | char pszLine[MAXLINE]; /* source line */\r |
| 169 | char pszWork[WORKSZ]; /* work buffer */\r |
| 170 | char acTFWrk[2]; /* tag/format work area */\r |
| 171 | size_t iI; /* work integer */\r |
| 172 | \r |
| 173 | if (p_pszEdit == NULL) /* q. null request? */\r |
| 174 | return AMSG; /* a. yes .. return display message */\r |
| 175 | \r |
| 176 | if (*p_pszEdit == '!') /* leave lines starting with ! alone */\r |
| 177 | return EditToWhitespace(p_pszEdit+1);\r |
| 178 | \r |
| 179 | if (*p_pszEdit == '*') /* q. comment line? */\r |
| 180 | { /* a. yes.. */\r |
| 181 | strncpy(pszWork, EditToWhitespace(p_pszEdit), MAXLINE); /* .. convert any tabs */\r |
| 182 | sprintf(gszOutput, ACOMMENTFMT, pszWork); /* .. put the comment out there in the opcode column */\r |
| 183 | return gszOutput; /* .. and return it */\r |
| 184 | }\r |
| 185 | \r |
| 186 | strncpy(pszLine, p_pszEdit, MAXLINE-1); /* copy the line local */\r |
| 187 | \r |
| 188 | ExpandTabs(pszLine, pszWork, gaiAsmTabs); /* expand the tabs */\r |
| 189 | strncpy(pszLine, pszWork, MAXLINE-1); /* copy the line back */\r |
| 190 | \r |
| 191 | for (iI = strlen(pszLine); iI--;) /* trim trailing whitespace */\r |
| 192 | {\r |
| 193 | if (*(pszLine + iI) <= ' ') /* q. space or less? */\r |
| 194 | *(pszLine + iI) = 0; /* a. yes .. remove it */\r |
| 195 | else /* otherwise */\r |
| 196 | break; /* .. done. Leave loop. */\r |
| 197 | }\r |
| 198 | \r |
| 199 | if (strlen(pszLine) == 0) /* q. blank line? */\r |
| 200 | { /* a. yes .. Assembler abhors these so */\r |
| 201 | sprintf(gszOutput, ABLANKLINE); /* format as comment statement */\r |
| 202 | return gszOutput; /* .. and return it */\r |
| 203 | }\r |
| 204 | \r |
| 205 | \r |
| 206 | /* TODO: Add code to process a strip switch \r |
| 207 | * comment?\r |
| 208 | */\r |
| 209 | \r |
| 210 | if (strlen(pszLine) > (TAGOFFSET + 1)) /* q. line long enough? */\r |
| 211 | { /* a. yes.. reorder tag/format */\r |
| 212 | memcpy(acTFWrk, pszLine + FMTOFFSET, 2); /* get tag/format */\r |
| 213 | memset((pszLine + FMTOFFSET), ' ', 2); /* .. blank 'em out */\r |
| 214 | \r |
| 215 | for (iI = 0; iI < 2; iI ++)\r |
| 216 | if (isalpha(acTFWrk[iI])) /* q. alpha char? */\r |
| 217 | *(pszLine + FMTOFFSET) = acTFWrk[iI]; /* a. yes .. make it format */\r |
| 218 | else if (isdigit(acTFWrk[iI])) /* q. digit? */\r |
| 219 | *(pszLine + TAGOFFSET) = acTFWrk[iI]; /* a. yes .. make it the tag */\r |
| 220 | }\r |
| 221 | \r |
| 222 | sprintf(gszOutput, AFORMAT, pszLine); /* format the line */\r |
| 223 | \r |
| 224 | return gszOutput; /* return formatted line */\r |
| 225 | }\r |
| 226 | \r |
| 227 | /*************************************************\r |
| 228 | * EditToFortran - convert tab-formatted input text line to FORTRAN format\r |
| 229 | * (a la DEC Fortran)\r |
| 230 | */\r |
| 231 | \r |
| 232 | char *EditToFortran(char* p_pszEdit) /* convert line to 1130 assembler */\r |
| 233 | {\r |
| 234 | char pszLine[MAXLINE]; /* source line */\r |
| 235 | char* pszWork; /* work pointer */\r |
| 236 | size_t iI; /* work integer */\r |
| 237 | int bContinue; /* true if continue */\r |
| 238 | \r |
| 239 | if (p_pszEdit == NULL) /* q. null request? */\r |
| 240 | return FMSG; /* a. yes .. return display message */\r |
| 241 | \r |
| 242 | if (strchr(p_pszEdit, '\t') == NULL) /* q. no tab in the line? */\r |
| 243 | return p_pszEdit; /* a. nope, return line as is, assume it's formatted correctly */\r |
| 244 | \r |
| 245 | if (*p_pszEdit == 'C' || *p_pszEdit == '*' || *p_pszEdit == '\0') /* q. comment or directive or blank line? */\r |
| 246 | { /* a. yes.. don't restructure */\r |
| 247 | return EditToWhitespace(p_pszEdit);\r |
| 248 | }\r |
| 249 | \r |
| 250 | strncpy(pszLine, p_pszEdit, MAXLINE-1); /* copy the line local */\r |
| 251 | \r |
| 252 | for (iI = strlen(pszLine); iI--;) /* trim trailing whitespace */\r |
| 253 | {\r |
| 254 | if (*(pszLine + iI) <= ' ') /* q. space or less? */\r |
| 255 | *(pszLine + iI) = 0; /* a. yes .. remove it */\r |
| 256 | else /* otherwise */\r |
| 257 | break; /* .. done. Leave loop. */\r |
| 258 | }\r |
| 259 | \r |
| 260 | /*\r |
| 261 | * TODO: Add code to process a strip switch \r |
| 262 | * comment?\r |
| 263 | */\r |
| 264 | \r |
| 265 | pszWork = (char*) pszLine; /* set pointer to line */\r |
| 266 | GetToken(gszLabel, 6, &pszWork); /* get the line, if any. */\r |
| 267 | \r |
| 268 | pszWork++; /* skip tab/whitespace */\r |
| 269 | \r |
| 270 | /* continuation... */\r |
| 271 | bContinue = ((isdigit(*pszWork) && (*pszWork != '0')) /* if first char non-zero digit */\r |
| 272 | || (!isspace(*pszWork) && !isalpha(*pszWork))); /* .. or non-alpha non-blank */\r |
| 273 | \r |
| 274 | memset(gszArg, 0, MAXLINE); /* .. and arguments */\r |
| 275 | \r |
| 276 | strncpy(gszArg, pszWork, 75); /* copy rest to argument */\r |
| 277 | \r |
| 278 | sprintf(gszOutput, (bContinue) ? FCONTFMT : FFORMAT, /* format the line */\r |
| 279 | gszLabel, /* .. statement # */\r |
| 280 | gszArg); /* .. code */\r |
| 281 | \r |
| 282 | return gszOutput; /* return formatted line */\r |
| 283 | }\r |
| 284 | \r |
| 285 | /*************************************************\r |
| 286 | * EditToWhitespace - expand tabs at 8 space intervals.\r |
| 287 | */\r |
| 288 | \r |
| 289 | char* EditToWhitespace(char *p_pszEdit)\r |
| 290 | {\r |
| 291 | int iI; /* work integer */\r |
| 292 | char pszLine[MAXLINE]; /* source line */\r |
| 293 | char pszWork[WORKSZ]; /* work buffer */\r |
| 294 | \r |
| 295 | if (p_pszEdit == NULL) /* q. null request? */\r |
| 296 | return AMSG; /* a. yes .. return display message */\r |
| 297 | \r |
| 298 | strncpy(pszLine, p_pszEdit, MAXLINE-1); /* copy the line local */\r |
| 299 | \r |
| 300 | ExpandTabs(pszLine, pszWork, gaiPlainTabs); /* expand the tabs */\r |
| 301 | strncpy(gszOutput, pszWork, MAXLINE-1); /* copy the line back */\r |
| 302 | \r |
| 303 | for (iI = strlen(gszOutput); iI--;) /* look at each character */\r |
| 304 | {\r |
| 305 | if (*(gszOutput + iI) <= ' ') /* q. space or less? */\r |
| 306 | *(gszOutput + iI) = 0; /* a. yes .. remove it */\r |
| 307 | else /* otherwise */\r |
| 308 | break; /* .. done. Leave loop. */\r |
| 309 | }\r |
| 310 | \r |
| 311 | \r |
| 312 | return gszOutput; /* ... return buffer */\r |
| 313 | }\r |