/[public]/psiconv/trunk/lib/psiconv/parse_formula.c
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Revision 103 - (hide annotations)
Wed Jan 31 00:41:43 2001 UTC (23 years, 2 months ago) by frodo
File MIME type: text/plain
File size: 25910 byte(s)
(Frodo) Added strings to formulas

1 frodo 100 /*
2     parse_formula.c - Part of psiconv, a PSION 5 file formats converter
3     Copyright (c) 2001 Frodo Looijaard <frodol@dds.nl>
4    
5     This program is free software; you can redistribute it and/or modify
6     it under the terms of the GNU General Public License as published by
7     the Free Software Foundation; either version 2 of the License, or
8     (at your option) any later version.
9    
10     This program is distributed in the hope that it will be useful,
11     but WITHOUT ANY WARRANTY; without even the implied warranty of
12     MERCHANTABILITY or FITNESS FOR A PARTICULAR PURPOSE. See the
13     GNU General Public License for more details.
14    
15     You should have received a copy of the GNU General Public License
16     along with this program; if not, write to the Free Software
17     Foundation, Inc., 675 Mass Ave, Cambridge, MA 02139, USA.
18     */
19    
20     #include "config.h"
21     #include "compat.h"
22    
23     #include <stdlib.h>
24    
25     #include "parse_routines.h"
26     #include "error.h"
27    
28     struct formula_element
29     {
30     psiconv_formula_type_t formula_type;
31     int number_of_args;
32     const char* name;
33     };
34    
35     static struct formula_element formula_elements[256] =
36     {
37     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* 0 */
38     {psiconv_formula_op_lt,2,"<"},
39     {psiconv_formula_op_le,2,"<="},
40     {psiconv_formula_op_gt,2,">"},
41     {psiconv_formula_op_ge,2,">="},
42     {psiconv_formula_op_ne,2,"<>"},
43     {psiconv_formula_op_eq,2,"="},
44     {psiconv_formula_op_add,2,"+"},
45     {psiconv_formula_op_sub,2,"-"},
46     {psiconv_formula_op_mul,2,"*"},
47     {psiconv_formula_op_div,2,"/"},
48     {psiconv_formula_op_pow,2,"^"},
49     {psiconv_formula_op_pos,1,"+"},
50     {psiconv_formula_op_neg,1,"-"},
51     {psiconv_formula_unknown,0,"*UNKNOWN*"},
52     {psiconv_formula_unknown,0,"*UNKNOWN*"},
53     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* 10 */
54     {psiconv_formula_op_con,2,"&"},
55     {psiconv_formula_op_bra,1,"{}"},
56     {psiconv_formula_unknown,0,"*UNKNOWN*"},
57     {psiconv_formula_unknown,0,"*UNKNOWN*"},
58     {psiconv_formula_mark_eof,0,"End of formula"},
59     {psiconv_formula_unknown,0,"*UNKNOWN*"},
60     {psiconv_formula_unknown,0,"*UNKNOWN*"},
61     {psiconv_formula_unknown,0,"*UNKNOWN*"},
62     {psiconv_formula_unknown,0,"*UNKNOWN*"},
63     {psiconv_formula_unknown,0,"*UNKNOWN*"},
64     {psiconv_formula_unknown,0,"*UNKNOWN*"},
65     {psiconv_formula_unknown,0,"*UNKNOWN*"},
66     {psiconv_formula_unknown,0,"*UNKNOWN*"},
67     {psiconv_formula_unknown,0,"*UNKNOWN*"},
68     {psiconv_formula_dat_float,0,"Floating point number"},
69     {psiconv_formula_dat_int,0,"Signed integer number"}, /* 20 */
70     {psiconv_formula_unknown,0,"*UNKNOWN*"},
71     {psiconv_formula_unknown,0,"*UNKNOWN*"},
72     {psiconv_formula_unknown,0,"*UNKNOWN*"},
73     {psiconv_formula_unknown,0,"*UNKNOWN*"},
74     {psiconv_formula_dat_var,0,"Named variable"},
75     {psiconv_formula_dat_string,0,"String"},
76     {psiconv_formula_dat_cellref,0,"Cell reference"},
77     {psiconv_formula_dat_cellblock,0,"Cell block"},
78     {psiconv_formula_dat_vcellblock,0,"Cell block {varargs}"},
79     {psiconv_formula_mark_opsep,0,"Operand separator"},
80     {psiconv_formula_mark_opend,0,"Operand list end"},
81     {psiconv_formula_unknown,0,"*UNKNOWN*"},
82     {psiconv_formula_unknown,0,"*UNKNOWN*"},
83     {psiconv_formula_unknown,0,"*UNKNOWN*"},
84     {psiconv_formula_unknown,0,"*UNKNOWN*"},
85     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* 30 */
86     {psiconv_formula_unknown,0,"*UNKNOWN*"},
87     {psiconv_formula_unknown,0,"*UNKNOWN*"},
88     {psiconv_formula_fun_false,0,"FALSE"},
89     {psiconv_formula_fun_if,3,"IF"},
90     {psiconv_formula_fun_true,0,"TRUE"},
91     {psiconv_formula_fun_cell,2,"CELL"},
92     {psiconv_formula_fun_errortype,0,"ERRORTYPE"},
93     {psiconv_formula_fun_isblank,1,"ISBLANK"},
94     {psiconv_formula_fun_iserr,1,"ISERR"},
95     {psiconv_formula_fun_iserror,1,"ISERROR"},
96     {psiconv_formula_fun_islogical,1,"ISLOGICAL"},
97     {psiconv_formula_fun_isna,1,"ISNA"},
98     {psiconv_formula_fun_isnontext,1,"ISNONTEXT"},
99     {psiconv_formula_fun_isnumber,1,"ISNUMBER"},
100     {psiconv_formula_fun_istext,1,"ISTEXT"},
101     {psiconv_formula_fun_n,1,"N"}, /* 40 */
102     {psiconv_formula_fun_type,1,"TYPE"},
103     {psiconv_formula_fun_address,2,"ADDRESS"},
104     {psiconv_formula_fun_column,1,"COLUMN"},
105     {psiconv_formula_fun_columns,1,"COLUMNS"},
106     {psiconv_formula_fun_hlookup,3,"HLOOKUP"},
107     {psiconv_formula_fun_index,3,"INDEX"},
108     {psiconv_formula_fun_indirect,1,"INDIRECT"},
109     {psiconv_formula_fun_lookup,3,"LOOKUP"},
110     {psiconv_formula_fun_offset,3,"OFFSET"},
111     {psiconv_formula_fun_row,1,"ROW"},
112     {psiconv_formula_fun_rows,1,"ROWS"},
113     {psiconv_formula_fun_vlookup,3,"VLOOKUP"},
114     {psiconv_formula_fun_char,1,"CHAR"},
115     {psiconv_formula_fun_code,1,"CODE"},
116     {psiconv_formula_fun_exact,2,"EXACT"},
117     {psiconv_formula_fun_find,3,"FIND"}, /* 50 */
118     {psiconv_formula_fun_left,2,"LEFT"},
119     {psiconv_formula_fun_len,1,"LEN"},
120     {psiconv_formula_fun_lower,1,"LOWER"},
121     {psiconv_formula_fun_mid,3,"MID"},
122     {psiconv_formula_fun_proper,1,"PROPER"},
123     {psiconv_formula_fun_replace,4,"REPLACE"},
124     {psiconv_formula_fun_rept,2,"REPT"},
125     {psiconv_formula_fun_right,2,"RIGHT"},
126     {psiconv_formula_fun_string,2,"STRING"},
127     {psiconv_formula_fun_t,1,"T"},
128     {psiconv_formula_fun_trim,1,"TRIM"},
129     {psiconv_formula_fun_upper,1,"UPPER"},
130     {psiconv_formula_fun_value,1,"VALUE"},
131     {psiconv_formula_fun_date,3,"DATE"},
132     {psiconv_formula_fun_datevalue,1,"DATEVALUE"},
133     {psiconv_formula_fun_day,1,"DAY"}, /* 60 */
134     {psiconv_formula_fun_hour,1,"HOUR"},
135     {psiconv_formula_fun_minute,1,"MINUTE"},
136     {psiconv_formula_fun_month,1,"MONTH"},
137     {psiconv_formula_fun_now,0,"NOW"},
138     {psiconv_formula_fun_second,1,"SECOND"},
139     {psiconv_formula_fun_today,0,"TODAY"},
140     {psiconv_formula_fun_time,3,"TIME"},
141     {psiconv_formula_fun_timevalue,1,"TIMEVALUE"},
142     {psiconv_formula_fun_year,1,"YEAR"},
143     {psiconv_formula_fun_abs,1,"ABS"},
144     {psiconv_formula_fun_acos,1,"ACOS"},
145     {psiconv_formula_fun_asin,1,"ASIN"},
146     {psiconv_formula_fun_atan,1,"ATAN"},
147     {psiconv_formula_fun_atan2,2,"ATAN2"},
148     {psiconv_formula_fun_cos,1,"COS"},
149     {psiconv_formula_fun_degrees,0,"DEGREES"}, /* 70 */
150     {psiconv_formula_fun_exp,1,"EXP"},
151     {psiconv_formula_fun_fact,1,"FACT"},
152     {psiconv_formula_fun_int,1,"INT"},
153     {psiconv_formula_fun_ln,1,"LN"},
154     {psiconv_formula_fun_log10,1,"LOG10"},
155     {psiconv_formula_fun_mod,2,"MOD"},
156     {psiconv_formula_fun_pi,0,"PI"},
157     {psiconv_formula_fun_radians,1,"RADIANS"},
158     {psiconv_formula_fun_rand,0,"RAND"},
159     {psiconv_formula_fun_round,2,"ROUND"},
160     {psiconv_formula_fun_sign,1,"SIGN"},
161     {psiconv_formula_fun_sin,1,"SIN"},
162     {psiconv_formula_fun_sqrt,1,"SQRT"},
163     {psiconv_formula_fun_sumproduct,2,"SUMPRODUCT"},
164     {psiconv_formula_fun_tan,1,"TAN"},
165     {psiconv_formula_fun_trunc,1,"TRUNC"}, /* 80 */
166     {psiconv_formula_fun_cterm,3,"CTERM"},
167     {psiconv_formula_fun_ddb,4,"DDB"},
168     {psiconv_formula_fun_fv,3,"FV"},
169     {psiconv_formula_fun_irr,2,"IRR"},
170     {psiconv_formula_fun_npv,2,"NPV"},
171     {psiconv_formula_fun_pmt,3,"PMT"},
172     {psiconv_formula_fun_pv,3,"PV"},
173     {psiconv_formula_fun_rate,3,"RATE"},
174     {psiconv_formula_fun_sln,3,"SLN"},
175     {psiconv_formula_fun_syd,4,"SYD"},
176     {psiconv_formula_fun_term,3,"TERM"},
177     {psiconv_formula_fun_combin,2,"COMBIN"},
178     {psiconv_formula_fun_permut,2,"PERMUT"},
179     {psiconv_formula_vfn_average,-1,"AVERAGE"},
180     {psiconv_formula_vfn_choose,-1,"CHOOSE"},
181     {psiconv_formula_vfn_count,-1,"COUNT"}, /* 90 */
182     {psiconv_formula_vfn_counta,-1,"COUNTA"},
183     {psiconv_formula_vfn_countblank,-1,"COUNTBLANK"},
184     {psiconv_formula_vfn_max,-1,"MAX"},
185     {psiconv_formula_vfn_min,-1,"MIN"},
186     {psiconv_formula_vfn_product,-1,"PRODUCT"},
187     {psiconv_formula_vfn_stdevp,-1,"STDEVP"},
188     {psiconv_formula_vfn_stdev,-1,"STDEV"},
189     {psiconv_formula_vfn_sum,-1,"SUM"},
190     {psiconv_formula_vfn_sumsq,-1,"SUMSQ"},
191     {psiconv_formula_vfn_varp,-1,"VARP"},
192     {psiconv_formula_vfn_var,-1,"VAR"},
193     {psiconv_formula_unknown,0,"*UNKNOWN*"},
194     {psiconv_formula_unknown,0,"*UNKNOWN*"},
195     {psiconv_formula_unknown,0,"*UNKNOWN*"},
196     {psiconv_formula_unknown,0,"*UNKNOWN*"},
197     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* A0 */
198     {psiconv_formula_unknown,0,"*UNKNOWN*"},
199     {psiconv_formula_unknown,0,"*UNKNOWN*"},
200     {psiconv_formula_unknown,0,"*UNKNOWN*"},
201     {psiconv_formula_unknown,0,"*UNKNOWN*"},
202     {psiconv_formula_unknown,0,"*UNKNOWN*"},
203     {psiconv_formula_unknown,0,"*UNKNOWN*"},
204     {psiconv_formula_unknown,0,"*UNKNOWN*"},
205     {psiconv_formula_unknown,0,"*UNKNOWN*"},
206     {psiconv_formula_unknown,0,"*UNKNOWN*"},
207     {psiconv_formula_unknown,0,"*UNKNOWN*"},
208     {psiconv_formula_unknown,0,"*UNKNOWN*"},
209     {psiconv_formula_unknown,0,"*UNKNOWN*"},
210     {psiconv_formula_unknown,0,"*UNKNOWN*"},
211     {psiconv_formula_unknown,0,"*UNKNOWN*"},
212     {psiconv_formula_unknown,0,"*UNKNOWN*"},
213     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* B0 */
214     {psiconv_formula_unknown,0,"*UNKNOWN*"},
215     {psiconv_formula_unknown,0,"*UNKNOWN*"},
216     {psiconv_formula_unknown,0,"*UNKNOWN*"},
217     {psiconv_formula_unknown,0,"*UNKNOWN*"},
218     {psiconv_formula_unknown,0,"*UNKNOWN*"},
219     {psiconv_formula_unknown,0,"*UNKNOWN*"},
220     {psiconv_formula_unknown,0,"*UNKNOWN*"},
221     {psiconv_formula_unknown,0,"*UNKNOWN*"},
222     {psiconv_formula_unknown,0,"*UNKNOWN*"},
223     {psiconv_formula_unknown,0,"*UNKNOWN*"},
224     {psiconv_formula_unknown,0,"*UNKNOWN*"},
225     {psiconv_formula_unknown,0,"*UNKNOWN*"},
226     {psiconv_formula_unknown,0,"*UNKNOWN*"},
227     {psiconv_formula_unknown,0,"*UNKNOWN*"},
228     {psiconv_formula_unknown,0,"*UNKNOWN*"},
229     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* C0 */
230     {psiconv_formula_unknown,0,"*UNKNOWN*"},
231     {psiconv_formula_unknown,0,"*UNKNOWN*"},
232     {psiconv_formula_unknown,0,"*UNKNOWN*"},
233     {psiconv_formula_unknown,0,"*UNKNOWN*"},
234     {psiconv_formula_unknown,0,"*UNKNOWN*"},
235     {psiconv_formula_unknown,0,"*UNKNOWN*"},
236     {psiconv_formula_unknown,0,"*UNKNOWN*"},
237     {psiconv_formula_unknown,0,"*UNKNOWN*"},
238     {psiconv_formula_unknown,0,"*UNKNOWN*"},
239     {psiconv_formula_unknown,0,"*UNKNOWN*"},
240     {psiconv_formula_unknown,0,"*UNKNOWN*"},
241     {psiconv_formula_unknown,0,"*UNKNOWN*"},
242     {psiconv_formula_unknown,0,"*UNKNOWN*"},
243     {psiconv_formula_unknown,0,"*UNKNOWN*"},
244     {psiconv_formula_unknown,0,"*UNKNOWN*"},
245     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* D0 */
246     {psiconv_formula_unknown,0,"*UNKNOWN*"},
247     {psiconv_formula_unknown,0,"*UNKNOWN*"},
248     {psiconv_formula_unknown,0,"*UNKNOWN*"},
249     {psiconv_formula_unknown,0,"*UNKNOWN*"},
250     {psiconv_formula_unknown,0,"*UNKNOWN*"},
251     {psiconv_formula_unknown,0,"*UNKNOWN*"},
252     {psiconv_formula_unknown,0,"*UNKNOWN*"},
253     {psiconv_formula_unknown,0,"*UNKNOWN*"},
254     {psiconv_formula_unknown,0,"*UNKNOWN*"},
255     {psiconv_formula_unknown,0,"*UNKNOWN*"},
256     {psiconv_formula_unknown,0,"*UNKNOWN*"},
257     {psiconv_formula_unknown,0,"*UNKNOWN*"},
258     {psiconv_formula_unknown,0,"*UNKNOWN*"},
259     {psiconv_formula_unknown,0,"*UNKNOWN*"},
260     {psiconv_formula_unknown,0,"*UNKNOWN*"},
261     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* E0 */
262     {psiconv_formula_unknown,0,"*UNKNOWN*"},
263     {psiconv_formula_unknown,0,"*UNKNOWN*"},
264     {psiconv_formula_unknown,0,"*UNKNOWN*"},
265     {psiconv_formula_unknown,0,"*UNKNOWN*"},
266     {psiconv_formula_unknown,0,"*UNKNOWN*"},
267     {psiconv_formula_unknown,0,"*UNKNOWN*"},
268     {psiconv_formula_unknown,0,"*UNKNOWN*"},
269     {psiconv_formula_unknown,0,"*UNKNOWN*"},
270     {psiconv_formula_unknown,0,"*UNKNOWN*"},
271     {psiconv_formula_unknown,0,"*UNKNOWN*"},
272     {psiconv_formula_unknown,0,"*UNKNOWN*"},
273     {psiconv_formula_unknown,0,"*UNKNOWN*"},
274     {psiconv_formula_unknown,0,"*UNKNOWN*"},
275     {psiconv_formula_unknown,0,"*UNKNOWN*"},
276     {psiconv_formula_unknown,0,"*UNKNOWN*"},
277     {psiconv_formula_unknown,0,"*UNKNOWN*"}, /* F0 */
278     {psiconv_formula_unknown,0,"*UNKNOWN*"},
279     {psiconv_formula_unknown,0,"*UNKNOWN*"},
280     {psiconv_formula_unknown,0,"*UNKNOWN*"},
281     {psiconv_formula_unknown,0,"*UNKNOWN*"},
282     {psiconv_formula_unknown,0,"*UNKNOWN*"},
283     {psiconv_formula_unknown,0,"*UNKNOWN*"},
284     {psiconv_formula_unknown,0,"*UNKNOWN*"},
285     {psiconv_formula_unknown,0,"*UNKNOWN*"},
286     {psiconv_formula_unknown,0,"*UNKNOWN*"},
287     {psiconv_formula_unknown,0,"*UNKNOWN*"},
288     {psiconv_formula_unknown,0,"*UNKNOWN*"},
289     {psiconv_formula_unknown,0,"*UNKNOWN*"},
290     {psiconv_formula_unknown,0,"*UNKNOWN*"},
291     {psiconv_formula_unknown,0,"*UNKNOWN*"},
292     {psiconv_formula_unknown,0,"*UNKNOWN*"}};
293    
294 frodo 103 static psiconv_string_t psiconv_read_sheet_string(const psiconv_buffer buf,
295     int lev,
296     psiconv_u32 off,int *length, int *status)
297     {
298     int stringlen,i,len,localstatus;
299     psiconv_string_t result;
300     char *res_copy;
301 frodo 102
302 frodo 103 psiconv_progress(lev+1,off,"Going to read a sheet string");
303    
304     stringlen = psiconv_read_u8(buf,lev+2,off,&localstatus);
305     if (localstatus)
306     goto ERROR1;
307     psiconv_debug(lev+2,off,"Length: %i",stringlen);
308     len = 1;
309    
310     result = malloc(stringlen + 1);
311     if (!result)
312     goto ERROR1;
313     for (i = 0; (i < stringlen) && !localstatus; i++)
314     result[i] = psiconv_read_u8(buf,lev,off+i+len,&localstatus);
315     if (localstatus)
316     goto ERROR2;
317     result[stringlen] = 0;
318     len += stringlen;
319    
320     res_copy = psiconv_make_printable(result);
321     if (!res_copy)
322     goto ERROR2;
323     psiconv_debug(lev+2,off,"Contents: `%s'",res_copy);
324     free(res_copy);
325    
326     if (length)
327     *length = len;
328    
329     if (status)
330     *status = 0;
331    
332     psiconv_progress(lev+1,off+len-1,"End of sheet string (total length: %08x)",
333     len);
334    
335     return result;
336    
337    
338     ERROR2:
339     free(result);
340     ERROR1:
341     psiconv_warn(lev+1,off,"Reading of sheet string failed");
342     if (status)
343     *status = localstatus;
344     if (length)
345     *length = 0;
346     return NULL;
347     }
348    
349    
350 frodo 102 static int psiconv_parse_sheet_ref(const psiconv_buffer buf,int lev,
351     psiconv_u32 off, int *length,
352     psiconv_sheet_ref_t *result)
353     {
354     int res;
355     psiconv_u16 temp;
356    
357     psiconv_progress(lev+1,off,"Going to read a sheet ref");
358     psiconv_progress(lev+2,off,"Going to read the offset encoding");
359     temp = psiconv_read_u16(buf,lev+2,off,&res);
360     if (res) {
361     if (length)
362     *length = 0;
363     return res;
364     }
365     psiconv_debug(lev+2,off,"Encoded word: %04x",temp);
366     result->absolute = (temp & 0x4000)?psiconv_bool_true:psiconv_bool_false;
367     result->offset = (temp & 0x3fff) * ((temp & 0x8000)?-1:1);
368     psiconv_debug(lev+2,off,"Reference: %s offset %d",
369     result->absolute?"absolute":"relative",result->offset);
370     if (length)
371     *length = 2;
372     return 0;
373     }
374    
375     static int psiconv_parse_sheet_cell_reference(const psiconv_buffer buf,int lev,
376     psiconv_u32 off, int *length,
377     psiconv_sheet_cell_reference_t *result)
378     {
379     int len = 0;
380     int leng,res;
381     psiconv_u8 temp;
382    
383     psiconv_progress(lev+1,off+len,"Going to read a sheet cell reference");
384     psiconv_progress(lev+2,off+len,"Going to read the row reference");
385     if ((res = psiconv_parse_sheet_ref(buf,lev+2,off+len,&leng,&result->row)))
386     goto ERROR;
387     len += leng;
388     psiconv_progress(lev+2,off+len,"Going to read the column reference");
389     if ((res = psiconv_parse_sheet_ref(buf,lev+2,off+len,&leng,&result->column)))
390     goto ERROR;
391     len += leng;
392    
393     psiconv_progress(lev+2,off+len,
394     "Going to read the trailing byte (%02x expected)",0);
395     temp = psiconv_read_u8(buf,lev+2,off+len,&res);
396     if (res)
397     goto ERROR;
398     if (temp != 0) {
399     psiconv_warn(lev+2,off+len,"Unknown byte in cell reference (ignored");
400     psiconv_debug(lev+2,off+len,"Trailing byte: %02x",temp);
401     }
402     len ++;
403     psiconv_progress(lev,off+len-1,
404     "End of cell reference (total length: %08x)", len);
405     if (length)
406     *length = len;
407     return 0;
408     ERROR:
409     if (length)
410     *length = 0;
411     return res;
412     }
413    
414     static int psiconv_parse_sheet_cell_block(const psiconv_buffer buf,int lev,
415     psiconv_u32 off, int *length,
416     psiconv_sheet_cell_block_t *result)
417     {
418     int len = 0;
419     int leng,res;
420    
421     psiconv_progress(lev+1,off+len,"Going to read a sheet cell block");
422     psiconv_progress(lev+2,off+len,"Going to read the first cell");
423     if ((res = psiconv_parse_sheet_cell_reference(buf,lev+2,off+len,&leng,
424     &result->first)))
425     goto ERROR;
426     len += leng;
427     psiconv_progress(lev+2,off+len,"Going to read the last cell");
428     if ((res = psiconv_parse_sheet_cell_reference(buf,lev+2,off+len,&leng,
429     &result->last)))
430     goto ERROR;
431     len += leng;
432     psiconv_progress(lev,off+len-1,
433     "End of cell block (total length: %08x)", len);
434     if (length)
435     *length = len;
436     return 0;
437     ERROR:
438     if (length)
439     *length = 0;
440     return res;
441     }
442    
443 frodo 100 int psiconv_parse_formula(const psiconv_buffer buf, int lev,
444     psiconv_u32 off, int *length,
445     psiconv_formula *result)
446     {
447     int res=0;
448     int len=0;
449     int leng;
450     int eof = 0;
451     psiconv_u8 marker;
452     psiconv_u32 bytelen;
453     psiconv_formula_list formula_stack;
454     psiconv_formula formula,subformula1,subformula2,subformula3,subformula4;
455    
456     psiconv_progress(lev+1,off,"Going to read a formula");
457     if (!(*result = malloc(sizeof(**result))))
458     goto ERROR1;
459     if (!(formula_stack = psiconv_list_new(sizeof(struct psiconv_formula_s))))
460     goto ERROR2;
461     if (!(formula = malloc(sizeof(*formula))))
462     goto ERROR3;
463     /* By setting the type to unknown, we can safely call psiconv_free_formula */
464     formula->type = psiconv_formula_unknown;
465     if (!(subformula1 = malloc(sizeof(*subformula1))))
466     goto ERROR4;
467     subformula1->type = psiconv_formula_unknown;
468     if (!(subformula2 = malloc(sizeof(*subformula2))))
469     goto ERROR5;
470     subformula2->type = psiconv_formula_unknown;
471     if (!(subformula3 = malloc(sizeof(*subformula3))))
472     goto ERROR6;
473     subformula3->type = psiconv_formula_unknown;
474     if (!(subformula4 = malloc(sizeof(*subformula4))))
475     goto ERROR7;
476     subformula4->type = psiconv_formula_unknown;
477    
478     psiconv_progress(lev+2,off+len,
479     "Going to read the formula byte length");
480     bytelen = psiconv_read_S(buf,lev+2,off+len,&leng,&res);
481     if (res)
482     goto ERROR8;
483     psiconv_debug(lev+2,off+len,"Formula byte length: %d",bytelen);
484     len += leng;
485     bytelen += len;
486    
487     psiconv_progress(lev+2,off+len,"Going to read the formula items");
488     while (!eof && len < bytelen) {
489     psiconv_progress(lev+3,off+len,"Going to read a formula item marker");
490     marker = psiconv_read_u8(buf,lev+2,off+len,&res);
491     if (res)
492     goto ERROR8;
493     psiconv_debug(lev+3,off+len,"Marker: %02x (%s)",marker,
494     formula_elements[marker].name);
495     len ++;
496    
497     if (formula_elements[marker].formula_type == psiconv_formula_unknown) {
498     psiconv_warn(lev+3,off+len,"Unknown formula marker found!");
499     goto ERROR8;
500     } else if (formula_elements[marker].formula_type ==
501     psiconv_formula_mark_eof) {
502     psiconv_progress(lev+3,off+len,"End of formula");
503     eof = 1;
504     } else if (formula_elements[marker].formula_type ==
505     psiconv_formula_dat_int) {
506     psiconv_progress(lev+3,off+len,"Next item: an integer");
507     formula->data.dat_int = psiconv_read_u32(buf,lev+2,off+len,&res);
508     if (res)
509     goto ERROR8;
510     formula->type = formula_elements[marker].formula_type;
511     psiconv_debug(lev+3,off+len,"Value: %08x",formula->data.dat_int);
512     len += 4;
513     if ((res = psiconv_list_add(formula_stack,formula)))
514     goto ERROR8;
515     formula->type = psiconv_formula_unknown;
516 frodo 101 } else if (formula_elements[marker].formula_type ==
517     psiconv_formula_dat_float) {
518     psiconv_progress(lev+3,off+len,"Next item: a float");
519     formula->data.dat_float = psiconv_read_float(buf,lev+2,off+len,&leng,
520     &res);
521     if (res)
522     goto ERROR8;
523     formula->type = formula_elements[marker].formula_type;
524     psiconv_debug(lev+3,off+len,"Value: %f",formula->data.dat_float);
525     len += leng;
526     if ((res = psiconv_list_add(formula_stack,formula)))
527     goto ERROR8;
528     formula->type = psiconv_formula_unknown;
529 frodo 102 } else if (formula_elements[marker].formula_type ==
530     psiconv_formula_dat_cellref) {
531     psiconv_progress(lev+3,off+len,"Next item: a cell reference");
532     if ((res = psiconv_parse_sheet_cell_reference(buf,lev+2,off+len,&leng,
533     &formula->data.dat_cellref)))
534     goto ERROR8;
535     formula->type = formula_elements[marker].formula_type;
536     len += leng;
537     if ((res = psiconv_list_add(formula_stack,formula)))
538     goto ERROR8;
539     formula->type = psiconv_formula_unknown;
540     } else if (formula_elements[marker].formula_type ==
541     psiconv_formula_dat_cellblock) {
542     psiconv_progress(lev+3,off+len,"Next item: a cell block");
543     if ((res = psiconv_parse_sheet_cell_block(buf,lev+2,off+len,&leng,
544     &formula->data.dat_cellblock)))
545     goto ERROR8;
546     formula->type = formula_elements[marker].formula_type;
547     len += leng;
548     if ((res = psiconv_list_add(formula_stack,formula)))
549     goto ERROR8;
550     formula->type = psiconv_formula_unknown;
551 frodo 103 } else if (formula_elements[marker].formula_type ==
552     psiconv_formula_dat_string) {
553     psiconv_progress(lev+3,off+len,"Next item: a string");
554     formula->data.dat_string =
555     psiconv_read_sheet_string(buf,lev+2,off+len,&leng,&res);
556     if (res)
557     goto ERROR8;
558     formula->type = formula_elements[marker].formula_type;
559     len += leng;
560     if ((res = psiconv_list_add(formula_stack,formula)))
561     goto ERROR8;
562     formula->type = psiconv_formula_unknown;
563 frodo 100 } else if ((formula_elements[marker].formula_type ==
564 frodo 101 psiconv_formula_dat_var) ||
565 frodo 100 (formula_elements[marker].formula_type ==
566     psiconv_formula_dat_string) ||
567     (formula_elements[marker].formula_type ==
568     psiconv_formula_dat_vcellblock) ||
569     (formula_elements[marker].formula_type ==
570     psiconv_formula_mark_opsep) ||
571     (formula_elements[marker].formula_type ==
572     psiconv_formula_mark_opend)) {
573     psiconv_warn(lev+3,off+len,"Not yet supported formula mark!");
574     goto ERROR8;
575     } else if (formula_elements[marker].number_of_args == -1) {
576     psiconv_warn(lev+3,off+len,"Vararg functions not yet supported!");
577     goto ERROR8;
578     } else {
579     if (formula_elements[marker].number_of_args > 0)
580     if ((res = psiconv_list_pop(formula_stack,subformula1)))
581     goto ERROR8;
582     if (formula_elements[marker].number_of_args > 1)
583     if ((res = psiconv_list_pop(formula_stack,subformula2)))
584     goto ERROR8;
585     if (formula_elements[marker].number_of_args > 2)
586     if ((res = psiconv_list_pop(formula_stack,subformula3)))
587     goto ERROR8;
588     if (formula_elements[marker].number_of_args > 3)
589     if ((res = psiconv_list_pop(formula_stack,subformula4)))
590     goto ERROR8;
591     if (!(formula->data.fun_operands =
592     psiconv_list_new(sizeof(*formula))))
593     goto ERROR8;
594     formula->type = formula_elements[marker].formula_type;
595     if (formula_elements[marker].number_of_args > 3)
596     if ((res = psiconv_list_add(formula->data.fun_operands,subformula4)))
597     goto ERROR8;
598     if (formula_elements[marker].number_of_args > 2)
599     if ((res = psiconv_list_add(formula->data.fun_operands,subformula3)))
600     goto ERROR8;
601     if (formula_elements[marker].number_of_args > 1)
602     if ((res = psiconv_list_add(formula->data.fun_operands,subformula2)))
603     goto ERROR8;
604     if (formula_elements[marker].number_of_args > 0)
605     if ((res = psiconv_list_add(formula->data.fun_operands,subformula1)))
606     goto ERROR8;
607     if ((res = psiconv_list_add(formula_stack,formula)))
608     goto ERROR8;
609     subformula4->type = subformula3->type = subformula2->type =
610     subformula1->type = formula->type = psiconv_formula_unknown;
611     }
612     }
613     if ((len != bytelen) || !eof) {
614     psiconv_warn(lev+2,off+len,"Formula corrupted!");
615     psiconv_debug(lev+2,off+len,"Expected end: %04x, found end: %04x",
616     bytelen,len);
617     goto ERROR8;
618     }
619     if ((psiconv_list_length(formula_stack)) != 1) {
620     psiconv_warn(lev+2,off+len,"Formula corrupted!");
621     psiconv_debug(lev+2,off+len,"More than one item left on the stack (%d)",
622     psiconv_list_length(formula_stack));
623     goto ERROR8;
624     }
625     if ((res = psiconv_list_pop(formula_stack,*result)))
626     goto ERROR8;
627     psiconv_list_free(formula_stack);
628     free(formula);
629    
630     if (length)
631     *length = len;
632    
633     psiconv_progress(lev,off+len-1,
634     "End of formula (total length: %08x)", len);
635     return 0;
636    
637     ERROR8:
638     psiconv_free_formula(subformula4);
639     ERROR7:
640     psiconv_free_formula(subformula3);
641     ERROR6:
642     psiconv_free_formula(subformula2);
643     ERROR5:
644     psiconv_free_formula(subformula1);
645     ERROR4:
646     psiconv_free_formula(formula);
647     ERROR3:
648     psiconv_free_formula_list(formula_stack);
649     ERROR2:
650     free (*result);
651     ERROR1:
652     psiconv_warn(lev+1,off,"Reading of formula failed");
653     if (length)
654     *length = 0;
655     if (!res)
656     return -PSICONV_E_NOMEM;
657     else
658     return res;
659     }
660    

frodo@frodo.looijaard.name
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