X-Git-Url: https://pintos-os.org/cgi-bin/gitweb.cgi?a=blobdiff_plain;f=src%2Flanguage%2Fdata-io%2Fplacement-parser.c;h=ca6f491ee0b7727002523ddf451a18625481c5e2;hb=dbb294a59a93358b911ae3c3982301842c18e66b;hp=4f1d062cb8d3b18734afacfc427f1bfd5b1b5408;hpb=173d1687aea88e0e5e1b1d8615ed68ebefb15d08;p=pspp diff --git a/src/language/data-io/placement-parser.c b/src/language/data-io/placement-parser.c index 4f1d062cb8..ca6f491ee0 100644 --- a/src/language/data-io/placement-parser.c +++ b/src/language/data-io/placement-parser.c @@ -1,5 +1,5 @@ /* PSPP - a program for statistical analysis. - Copyright (C) 2006 Free Software Foundation, Inc. + Copyright (C) 2006, 2010, 2011, 2012 Free Software Foundation, Inc. This program is free software: you can redistribute it and/or modify it under the terms of the GNU General Public License as published by @@ -16,20 +16,20 @@ #include -#include +#include "language/data-io/placement-parser.h" #include -#include -#include -#include -#include -#include +#include "data/format.h" +#include "language/lexer/format-parser.h" +#include "language/lexer/lexer.h" +#include "libpspp/message.h" +#include "libpspp/pool.h" +#include "libpspp/str.h" -#include - -#include "xalloc.h" -#include "xsize.h" +#include "gl/c-strcase.h" +#include "gl/xalloc.h" +#include "gl/xsize.h" #include "gettext.h" #define _(msgid) gettext (msgid) @@ -43,9 +43,9 @@ enum PRS_TYPE_NEW_REC /* Next record. */ }; -static bool fixed_parse_columns (struct lexer *, struct pool *, size_t var_cnt, bool for_input, - struct fmt_spec **, size_t *); -static bool fixed_parse_fortran (struct lexer *l, struct pool *, bool for_input, +static bool fixed_parse_columns (struct lexer *, struct pool *, size_t var_cnt, + enum fmt_use, struct fmt_spec **, size_t *); +static bool fixed_parse_fortran (struct lexer *l, struct pool *, enum fmt_use, struct fmt_spec **, size_t *); /* Parses Fortran-like or column-based specifications for placing @@ -53,6 +53,13 @@ static bool fixed_parse_fortran (struct lexer *l, struct pool *, bool for_input, formats like those parsed by DATA LIST or PRINT. Returns true only if successful. + The formats parsed are either input or output formats, according + to USE. + + If USE is FMT_FOR_INPUT, then T, X, and / "formats" are parsed, + in addition to regular formats. If USE is FMT_FOR_OUTPUT, then + T and X "formats" are parsed but not /. + If successful, formats for VAR_CNT variables are stored in *FORMATS, and the number of formats required is stored in *FORMAT_CNT. *FORMAT_CNT may be greater than VAR_CNT because @@ -64,18 +71,20 @@ static bool fixed_parse_fortran (struct lexer *l, struct pool *, bool for_input, Uses POOL for allocation. When the caller is finished interpreting *FORMATS, POOL may be destroyed. */ bool -parse_var_placements (struct lexer *lexer, struct pool *pool, size_t var_cnt, bool for_input, +parse_var_placements (struct lexer *lexer, struct pool *pool, size_t var_cnt, + enum fmt_use use, struct fmt_spec **formats, size_t *format_cnt) { assert (var_cnt > 0); if (lex_is_number (lexer)) - return fixed_parse_columns (lexer, pool, var_cnt, for_input, formats, format_cnt); - else if (lex_match (lexer, '(')) + return fixed_parse_columns (lexer, pool, var_cnt, use, + formats, format_cnt); + else if (lex_match (lexer, T_LPAREN)) { size_t assignment_cnt; size_t i; - if (!fixed_parse_fortran (lexer, pool, for_input, formats, format_cnt)) + if (!fixed_parse_fortran (lexer, pool, use, formats, format_cnt)) return false; assignment_cnt = 0; @@ -102,7 +111,8 @@ parse_var_placements (struct lexer *lexer, struct pool *pool, size_t var_cnt, bo /* Implements parse_var_placements for column-based formats. */ static bool -fixed_parse_columns (struct lexer *lexer, struct pool *pool, size_t var_cnt, bool for_input, +fixed_parse_columns (struct lexer *lexer, struct pool *pool, size_t var_cnt, + enum fmt_use use, struct fmt_spec **formats, size_t *format_cnt) { struct fmt_spec format; @@ -123,14 +133,14 @@ fixed_parse_columns (struct lexer *lexer, struct pool *pool, size_t var_cnt, boo } /* Format specifier. */ - if (lex_match (lexer, '(')) + if (lex_match (lexer, T_LPAREN)) { /* Get format type. */ if (lex_token (lexer) == T_ID) { if (!parse_format_specifier_name (lexer, &format.type)) return false; - lex_match (lexer, ','); + lex_match (lexer, T_COMMA); } else format.type = FMT_F; @@ -144,7 +154,7 @@ fixed_parse_columns (struct lexer *lexer, struct pool *pool, size_t var_cnt, boo else format.d = 0; - if (!lex_force_match (lexer, ')')) + if (!lex_force_match (lexer, T_RPAREN)) return false; } else @@ -152,7 +162,7 @@ fixed_parse_columns (struct lexer *lexer, struct pool *pool, size_t var_cnt, boo format.type = FMT_F; format.d = 0; } - if (!fmt_check (&format, for_input)) + if (!fmt_check (&format, use)) return false; *formats = pool_nalloc (pool, var_cnt + 1, sizeof **formats); @@ -166,14 +176,14 @@ fixed_parse_columns (struct lexer *lexer, struct pool *pool, size_t var_cnt, boo /* Implements parse_var_placements for Fortran-like formats. */ static bool -fixed_parse_fortran (struct lexer *lexer, struct pool *pool, bool for_input, +fixed_parse_fortran (struct lexer *lexer, struct pool *pool, enum fmt_use use, struct fmt_spec **formats, size_t *format_cnt) { size_t formats_allocated = 0; size_t formats_used = 0; *formats = NULL; - while (!lex_match (lexer, ')')) + while (!lex_match (lexer, T_RPAREN)) { struct fmt_spec f; struct fmt_spec *new_formats; @@ -191,10 +201,10 @@ fixed_parse_fortran (struct lexer *lexer, struct pool *pool, bool for_input, count = 1; /* Parse format specifier. */ - if (lex_match (lexer, '(')) + if (lex_match (lexer, T_LPAREN)) { /* Call ourselves recursively to handle parentheses. */ - if (!fixed_parse_fortran (lexer, pool, for_input, + if (!fixed_parse_fortran (lexer, pool, use, &new_formats, &new_format_cnt)) return false; } @@ -202,7 +212,7 @@ fixed_parse_fortran (struct lexer *lexer, struct pool *pool, bool for_input, { new_formats = &f; new_format_cnt = 1; - if (lex_match (lexer, '/')) + if (use == FMT_FOR_INPUT && lex_match (lexer, T_SLASH)) f.type = PRS_TYPE_NEW_REC; else { @@ -211,9 +221,9 @@ fixed_parse_fortran (struct lexer *lexer, struct pool *pool, bool for_input, if (!parse_abstract_format_specifier (lexer, type, &f.w, &f.d)) return false; - if (!strcasecmp (type, "T")) + if (!c_strcasecmp (type, "T")) f.type = PRS_TYPE_T; - else if (!strcasecmp (type, "X")) + else if (!c_strcasecmp (type, "X")) { f.type = PRS_TYPE_X; f.w = count; @@ -226,7 +236,7 @@ fixed_parse_fortran (struct lexer *lexer, struct pool *pool, bool for_input, msg (SE, _("Unknown format type `%s'."), type); return false; } - if (!fmt_check (&f, for_input)) + if (!fmt_check (&f, use)) return false; } } @@ -253,7 +263,7 @@ fixed_parse_fortran (struct lexer *lexer, struct pool *pool, bool for_input, formats_used += new_format_cnt; } - lex_match (lexer, ','); + lex_match (lexer, T_COMMA); } *format_cnt = formats_used; @@ -268,7 +278,7 @@ bool execute_placement_format (const struct fmt_spec *format, int *record, int *column) { - switch (format->type) + switch ((int) format->type) { case PRS_TYPE_X: *column += format->w; @@ -289,16 +299,11 @@ execute_placement_format (const struct fmt_spec *format, } } -/* Parses a BASE-based column using LEXER. Returns true and - stores a 1-based column number into *COLUMN if successful, - otherwise emits an error message and returns false. */ static bool -parse_column (struct lexer *lexer, int base, int *column) +parse_column__ (int value, int base, int *column) { assert (base == 0 || base == 1); - if (!lex_force_int (lexer)) - return false; - *column = lex_integer (lexer) - base + 1; + *column = value - base + 1; if (*column < 1) { if (base == 1) @@ -307,6 +312,26 @@ parse_column (struct lexer *lexer, int base, int *column) msg (SE, _("Column positions for fields must not be negative.")); return false; } + return true; +} + +/* Parses a BASE-based column using LEXER. Returns true and + stores a 1-based column number into *COLUMN if successful, + otherwise emits an error message and returns false. + + If BASE is 0, zero-based column numbers are parsed; if BASE is + 1, 1-based column numbers are parsed. Regardless of BASE, the + values stored in *FIRST_COLUMN and *LAST_COLUMN are + 1-based. */ +bool +parse_column (struct lexer *lexer, int base, int *column) +{ + assert (base == 0 || base == 1); + + if (!lex_force_int (lexer) + || !parse_column__ (lex_integer (lexer), base, column)) + return false; + lex_get (lexer); return true; } @@ -330,15 +355,18 @@ parse_column_range (struct lexer *lexer, int base, bool *range_specified) { /* First column. */ - if (!parse_column (lexer, base, first_column)) + if (!lex_force_int (lexer) + || !parse_column__ (lex_integer (lexer), base, first_column)) return false; + lex_get (lexer); /* Last column. */ - lex_negative_to_dash (lexer); - if (lex_match (lexer, '-')) + if (lex_is_integer (lexer) && lex_integer (lexer) < 0) { - if (!parse_column (lexer, base, last_column)) + if (!parse_column__ (-lex_integer (lexer), base, last_column)) return false; + lex_get (lexer); + if (*last_column < *first_column) { msg (SE, _("The ending column for a field must be " @@ -369,7 +397,7 @@ parse_column_range (struct lexer *lexer, int base, bool parse_record_placement (struct lexer *lexer, int *record, int *column) { - while (lex_match (lexer, '/')) + while (lex_match (lexer, T_SLASH)) { if (lex_is_integer (lexer)) {