diff options
Diffstat (limited to 'test/monniaux/glpk-4.65/src/mpl/mpl6.c')
| -rw-r--r-- | test/monniaux/glpk-4.65/src/mpl/mpl6.c | 1039 |
1 files changed, 1039 insertions, 0 deletions
diff --git a/test/monniaux/glpk-4.65/src/mpl/mpl6.c b/test/monniaux/glpk-4.65/src/mpl/mpl6.c new file mode 100644 index 00000000..ac2a0393 --- /dev/null +++ b/test/monniaux/glpk-4.65/src/mpl/mpl6.c @@ -0,0 +1,1039 @@ +/* mpl6.c */ + +/*********************************************************************** +* This code is part of GLPK (GNU Linear Programming Kit). +* +* Copyright (C) 2003-2017 Andrew Makhorin, Department for Applied +* Informatics, Moscow Aviation Institute, Moscow, Russia. All rights +* reserved. E-mail: <mao@gnu.org>. +* +* GLPK is free software: you can redistribute it and/or modify it +* under the terms of the GNU General Public License as published by +* the Free Software Foundation, either version 3 of the License, or +* (at your option) any later version. +* +* GLPK is distributed in the hope that it will be useful, but WITHOUT +* ANY WARRANTY; without even the implied warranty of MERCHANTABILITY +* or FITNESS FOR A PARTICULAR PURPOSE. See the GNU General Public +* License for more details. +* +* You should have received a copy of the GNU General Public License +* along with GLPK. If not, see <http://www.gnu.org/licenses/>. +***********************************************************************/ + +#include "mpl.h" +#include "mplsql.h" + +/**********************************************************************/ + +#define CSV_FIELD_MAX 50 +/* maximal number of fields in record */ + +#define CSV_FDLEN_MAX 100 +/* maximal field length */ + +struct csv +{ /* comma-separated values file */ + int mode; + /* 'R' = reading; 'W' = writing */ + char *fname; + /* name of csv file */ + FILE *fp; + /* stream assigned to csv file */ + jmp_buf jump; + /* address for non-local go to in case of error */ + int count; + /* record count */ + /*--------------------------------------------------------------*/ + /* used only for input csv file */ + int c; + /* current character or EOF */ + int what; + /* current marker: */ +#define CSV_EOF 0 /* end-of-file */ +#define CSV_EOR 1 /* end-of-record */ +#define CSV_NUM 2 /* floating-point number */ +#define CSV_STR 3 /* character string */ + char field[CSV_FDLEN_MAX+1]; + /* current field just read */ + int nf; + /* number of fields in the csv file */ + int ref[1+CSV_FIELD_MAX]; + /* ref[k] = k', if k-th field of the csv file corresponds to + k'-th field in the table statement; if ref[k] = 0, k-th field + of the csv file is ignored */ +#if 1 /* 01/VI-2010 */ + int nskip; + /* number of comment records preceding the header record */ +#endif +}; + +#undef read_char + +static void read_char(struct csv *csv) +{ /* read character from csv data file */ + int c; + xassert(csv->c != EOF); + if (csv->c == '\n') csv->count++; +loop: c = fgetc(csv->fp); + if (ferror(csv->fp)) + { xprintf("%s:%d: read error - %s\n", csv->fname, csv->count, +#if 0 /* 29/I-2017 */ + strerror(errno)); +#else + xstrerr(errno)); +#endif + longjmp(csv->jump, 0); + } + if (feof(csv->fp)) + { if (csv->c == '\n') + { csv->count--; + c = EOF; + } + else + { xprintf("%s:%d: warning: missing final end-of-line\n", + csv->fname, csv->count); + c = '\n'; + } + } + else if (c == '\r') + goto loop; + else if (c == '\n') + ; + else if (iscntrl(c)) + { xprintf("%s:%d: invalid control character 0x%02X\n", + csv->fname, csv->count, c); + longjmp(csv->jump, 0); + } + csv->c = c; + return; +} + +static void read_field(struct csv *csv) +{ /* read field from csv data file */ + /* check for end of file */ + if (csv->c == EOF) + { csv->what = CSV_EOF; + strcpy(csv->field, "EOF"); + goto done; + } + /* check for end of record */ + if (csv->c == '\n') + { csv->what = CSV_EOR; + strcpy(csv->field, "EOR"); + read_char(csv); + if (csv->c == ',') +err1: { xprintf("%s:%d: empty field not allowed\n", csv->fname, + csv->count); + longjmp(csv->jump, 0); + } + if (csv->c == '\n') + { xprintf("%s:%d: empty record not allowed\n", csv->fname, + csv->count); + longjmp(csv->jump, 0); + } +#if 1 /* 01/VI-2010 */ + /* skip comment records; may appear only before the very first + record containing field names */ + if (csv->c == '#' && csv->count == 1) + { while (csv->c == '#') + { while (csv->c != '\n') + read_char(csv); + read_char(csv); + csv->nskip++; + } + } +#endif + goto done; + } + /* skip comma before next field */ + if (csv->c == ',') + read_char(csv); + /* read field */ + if (csv->c == '\'' || csv->c == '"') + { /* read a field enclosed in quotes */ + int quote = csv->c, len = 0; + csv->what = CSV_STR; + /* skip opening quote */ + read_char(csv); + /* read field characters within quotes */ + for (;;) + { /* check for closing quote and read it */ + if (csv->c == quote) + { read_char(csv); + if (csv->c == quote) + ; + else if (csv->c == ',' || csv->c == '\n') + break; + else + { xprintf("%s:%d: invalid field\n", csv->fname, + csv->count); + longjmp(csv->jump, 0); + } + } + /* check the current field length */ + if (len == CSV_FDLEN_MAX) +err2: { xprintf("%s:%d: field too long\n", csv->fname, + csv->count); + longjmp(csv->jump, 0); + } + /* add the current character to the field */ + csv->field[len++] = (char)csv->c; + /* read the next character */ + read_char(csv); + } + /* the field has been read */ + if (len == 0) goto err1; + csv->field[len] = '\0'; + } + else + { /* read a field not enclosed in quotes */ + int len = 0; + double temp; + csv->what = CSV_NUM; + while (!(csv->c == ',' || csv->c == '\n')) + { /* quotes within the field are not allowed */ + if (csv->c == '\'' || csv->c == '"') + { xprintf("%s:%d: invalid use of single or double quote wi" + "thin field\n", csv->fname, csv->count); + longjmp(csv->jump, 0); + } + /* check the current field length */ + if (len == CSV_FDLEN_MAX) goto err2; + /* add the current character to the field */ + csv->field[len++] = (char)csv->c; + /* read the next character */ + read_char(csv); + } + /* the field has been read */ + if (len == 0) goto err1; + csv->field[len] = '\0'; + /* check the field type */ + if (str2num(csv->field, &temp)) csv->what = CSV_STR; + } +done: return; +} + +static struct csv *csv_open_file(TABDCA *dca, int mode) +{ /* open csv data file */ + struct csv *csv; + /* create control structure */ + csv = xmalloc(sizeof(struct csv)); + csv->mode = mode; + csv->fname = NULL; + csv->fp = NULL; + if (setjmp(csv->jump)) goto fail; + csv->count = 0; + csv->c = '\n'; + csv->what = 0; + csv->field[0] = '\0'; + csv->nf = 0; + /* try to open the csv data file */ + if (mpl_tab_num_args(dca) < 2) + { xprintf("csv_driver: file name not specified\n"); + longjmp(csv->jump, 0); + } + csv->fname = xmalloc(strlen(mpl_tab_get_arg(dca, 2))+1); + strcpy(csv->fname, mpl_tab_get_arg(dca, 2)); + if (mode == 'R') + { /* open the file for reading */ + int k; + csv->fp = fopen(csv->fname, "r"); + if (csv->fp == NULL) + { xprintf("csv_driver: unable to open %s - %s\n", +#if 0 /* 29/I-2017 */ + csv->fname, strerror(errno)); +#else + csv->fname, xstrerr(errno)); +#endif + longjmp(csv->jump, 0); + } +#if 1 /* 01/VI-2010 */ + csv->nskip = 0; +#endif + /* skip fake new-line */ + read_field(csv); + xassert(csv->what == CSV_EOR); + /* read field names */ + xassert(csv->nf == 0); + for (;;) + { read_field(csv); + if (csv->what == CSV_EOR) + break; + if (csv->what != CSV_STR) + { xprintf("%s:%d: invalid field name\n", csv->fname, + csv->count); + longjmp(csv->jump, 0); + } + if (csv->nf == CSV_FIELD_MAX) + { xprintf("%s:%d: too many fields\n", csv->fname, + csv->count); + longjmp(csv->jump, 0); + } + csv->nf++; + /* find corresponding field in the table statement */ + for (k = mpl_tab_num_flds(dca); k >= 1; k--) + { if (strcmp(mpl_tab_get_name(dca, k), csv->field) == 0) + break; + } + csv->ref[csv->nf] = k; + } + /* find dummy RECNO field in the table statement */ + for (k = mpl_tab_num_flds(dca); k >= 1; k--) + if (strcmp(mpl_tab_get_name(dca, k), "RECNO") == 0) break; + csv->ref[0] = k; + } + else if (mode == 'W') + { /* open the file for writing */ + int k, nf; + csv->fp = fopen(csv->fname, "w"); + if (csv->fp == NULL) + { xprintf("csv_driver: unable to create %s - %s\n", +#if 0 /* 29/I-2017 */ + csv->fname, strerror(errno)); +#else + csv->fname, xstrerr(errno)); +#endif + longjmp(csv->jump, 0); + } + /* write field names */ + nf = mpl_tab_num_flds(dca); + for (k = 1; k <= nf; k++) + fprintf(csv->fp, "%s%c", mpl_tab_get_name(dca, k), + k < nf ? ',' : '\n'); + csv->count++; + } + else + xassert(mode != mode); + /* the file has been open */ + return csv; +fail: /* the file cannot be open */ + if (csv->fname != NULL) xfree(csv->fname); + if (csv->fp != NULL) fclose(csv->fp); + xfree(csv); + return NULL; +} + +static int csv_read_record(TABDCA *dca, struct csv *csv) +{ /* read next record from csv data file */ + int k, ret = 0; + xassert(csv->mode == 'R'); + if (setjmp(csv->jump)) + { ret = 1; + goto done; + } + /* read dummy RECNO field */ + if (csv->ref[0] > 0) +#if 0 /* 01/VI-2010 */ + mpl_tab_set_num(dca, csv->ref[0], csv->count-1); +#else + mpl_tab_set_num(dca, csv->ref[0], csv->count-csv->nskip-1); +#endif + /* read fields */ + for (k = 1; k <= csv->nf; k++) + { read_field(csv); + if (csv->what == CSV_EOF) + { /* end-of-file reached */ + xassert(k == 1); + ret = -1; + goto done; + } + else if (csv->what == CSV_EOR) + { /* end-of-record reached */ + int lack = csv->nf - k + 1; + if (lack == 1) + xprintf("%s:%d: one field missing\n", csv->fname, + csv->count); + else + xprintf("%s:%d: %d fields missing\n", csv->fname, + csv->count, lack); + longjmp(csv->jump, 0); + } + else if (csv->what == CSV_NUM) + { /* floating-point number */ + if (csv->ref[k] > 0) + { double num; + xassert(str2num(csv->field, &num) == 0); + mpl_tab_set_num(dca, csv->ref[k], num); + } + } + else if (csv->what == CSV_STR) + { /* character string */ + if (csv->ref[k] > 0) + mpl_tab_set_str(dca, csv->ref[k], csv->field); + } + else + xassert(csv != csv); + } + /* now there must be NL */ + read_field(csv); + xassert(csv->what != CSV_EOF); + if (csv->what != CSV_EOR) + { xprintf("%s:%d: too many fields\n", csv->fname, csv->count); + longjmp(csv->jump, 0); + } +done: return ret; +} + +static int csv_write_record(TABDCA *dca, struct csv *csv) +{ /* write next record to csv data file */ + int k, nf, ret = 0; + const char *c; + xassert(csv->mode == 'W'); + nf = mpl_tab_num_flds(dca); + for (k = 1; k <= nf; k++) + { switch (mpl_tab_get_type(dca, k)) + { case 'N': + fprintf(csv->fp, "%.*g", DBL_DIG, + mpl_tab_get_num(dca, k)); + break; + case 'S': + fputc('"', csv->fp); + for (c = mpl_tab_get_str(dca, k); *c != '\0'; c++) + { if (*c == '"') + fputc('"', csv->fp), fputc('"', csv->fp); + else + fputc(*c, csv->fp); + } + fputc('"', csv->fp); + break; + default: + xassert(dca != dca); + } + fputc(k < nf ? ',' : '\n', csv->fp); + } + csv->count++; + if (ferror(csv->fp)) + { xprintf("%s:%d: write error - %s\n", csv->fname, csv->count, +#if 0 /* 29/I-2017 */ + strerror(errno)); +#else + xstrerr(errno)); +#endif + ret = 1; + } + return ret; +} + +static int csv_close_file(TABDCA *dca, struct csv *csv) +{ /* close csv data file */ + int ret = 0; + xassert(dca == dca); + if (csv->mode == 'W') + { fflush(csv->fp); + if (ferror(csv->fp)) + { xprintf("%s:%d: write error - %s\n", csv->fname, +#if 0 /* 29/I-2017 */ + csv->count, strerror(errno)); +#else + csv->count, xstrerr(errno)); +#endif + ret = 1; + } + } + xfree(csv->fname); + fclose(csv->fp); + xfree(csv); + return ret; +} + +/**********************************************************************/ + +#define DBF_FIELD_MAX 50 +/* maximal number of fields in record */ + +#define DBF_FDLEN_MAX 100 +/* maximal field length */ + +struct dbf +{ /* xBASE data file */ + int mode; + /* 'R' = reading; 'W' = writing */ + char *fname; + /* name of xBASE file */ + FILE *fp; + /* stream assigned to xBASE file */ + jmp_buf jump; + /* address for non-local go to in case of error */ + int offset; + /* offset of a byte to be read next */ + int count; + /* record count */ + int nf; + /* number of fields */ + int ref[1+DBF_FIELD_MAX]; + /* ref[k] = k', if k-th field of the csv file corresponds to + k'-th field in the table statement; if ref[k] = 0, k-th field + of the csv file is ignored */ + int type[1+DBF_FIELD_MAX]; + /* type[k] is type of k-th field */ + int len[1+DBF_FIELD_MAX]; + /* len[k] is length of k-th field */ + int prec[1+DBF_FIELD_MAX]; + /* prec[k] is precision of k-th field */ +}; + +static int read_byte(struct dbf *dbf) +{ /* read byte from xBASE data file */ + int b; + b = fgetc(dbf->fp); + if (ferror(dbf->fp)) + { xprintf("%s:0x%X: read error - %s\n", dbf->fname, +#if 0 /* 29/I-2017 */ + dbf->offset, strerror(errno)); +#else + dbf->offset, xstrerr(errno)); +#endif + longjmp(dbf->jump, 0); + } + if (feof(dbf->fp)) + { xprintf("%s:0x%X: unexpected end of file\n", dbf->fname, + dbf->offset); + longjmp(dbf->jump, 0); + } + xassert(0x00 <= b && b <= 0xFF); + dbf->offset++; + return b; +} + +static void read_header(TABDCA *dca, struct dbf *dbf) +{ /* read xBASE data file header */ + int b, j, k, recl; + char name[10+1]; + /* (ignored) */ + for (j = 1; j <= 10; j++) + read_byte(dbf); + /* length of each record, in bytes */ + recl = read_byte(dbf); + recl += read_byte(dbf) << 8; + /* (ignored) */ + for (j = 1; j <= 20; j++) + read_byte(dbf); + /* field descriptor array */ + xassert(dbf->nf == 0); + for (;;) + { /* check for end of array */ + b = read_byte(dbf); + if (b == 0x0D) break; + if (dbf->nf == DBF_FIELD_MAX) + { xprintf("%s:0x%X: too many fields\n", dbf->fname, + dbf->offset); + longjmp(dbf->jump, 0); + } + dbf->nf++; + /* field name */ + name[0] = (char)b; + for (j = 1; j < 10; j++) + { b = read_byte(dbf); + name[j] = (char)b; + } + name[10] = '\0'; + b = read_byte(dbf); + if (b != 0x00) + { xprintf("%s:0x%X: invalid field name\n", dbf->fname, + dbf->offset); + longjmp(dbf->jump, 0); + } + /* find corresponding field in the table statement */ + for (k = mpl_tab_num_flds(dca); k >= 1; k--) + if (strcmp(mpl_tab_get_name(dca, k), name) == 0) break; + dbf->ref[dbf->nf] = k; + /* field type */ + b = read_byte(dbf); + if (!(b == 'C' || b == 'N')) + { xprintf("%s:0x%X: invalid field type\n", dbf->fname, + dbf->offset); + longjmp(dbf->jump, 0); + } + dbf->type[dbf->nf] = b; + /* (ignored) */ + for (j = 1; j <= 4; j++) + read_byte(dbf); + /* field length */ + b = read_byte(dbf); + if (b == 0) + { xprintf("%s:0x%X: invalid field length\n", dbf->fname, + dbf->offset); + longjmp(dbf->jump, 0); + } + if (b > DBF_FDLEN_MAX) + { xprintf("%s:0x%X: field too long\n", dbf->fname, + dbf->offset); + longjmp(dbf->jump, 0); + } + dbf->len[dbf->nf] = b; + recl -= b; + /* (ignored) */ + for (j = 1; j <= 15; j++) + read_byte(dbf); + } + if (recl != 1) + { xprintf("%s:0x%X: invalid file header\n", dbf->fname, + dbf->offset); + longjmp(dbf->jump, 0); + } + /* find dummy RECNO field in the table statement */ + for (k = mpl_tab_num_flds(dca); k >= 1; k--) + if (strcmp(mpl_tab_get_name(dca, k), "RECNO") == 0) break; + dbf->ref[0] = k; + return; +} + +static void parse_third_arg(TABDCA *dca, struct dbf *dbf) +{ /* parse xBASE file format (third argument) */ + int j, k, temp; + const char *arg; + dbf->nf = mpl_tab_num_flds(dca); + arg = mpl_tab_get_arg(dca, 3), j = 0; + for (k = 1; k <= dbf->nf; k++) + { /* parse specification of k-th field */ + if (arg[j] == '\0') + { xprintf("xBASE driver: field %s: specification missing\n", + mpl_tab_get_name(dca, k)); + longjmp(dbf->jump, 0); + } + /* parse field type */ + if (arg[j] == 'C' || arg[j] == 'N') + dbf->type[k] = arg[j], j++; + else + { xprintf("xBASE driver: field %s: invalid field type\n", + mpl_tab_get_name(dca, k)); + longjmp(dbf->jump, 0); + } + /* check for left parenthesis */ + if (arg[j] == '(') + j++; + else +err: { xprintf("xBASE driver: field %s: invalid field format\n", + mpl_tab_get_name(dca, k)); + longjmp(dbf->jump, 0); + } + /* parse field length */ + temp = 0; + while (isdigit(arg[j])) + { if (temp > DBF_FDLEN_MAX) break; + temp = 10 * temp + (arg[j] - '0'), j++; + } + if (!(1 <= temp && temp <= DBF_FDLEN_MAX)) + { xprintf("xBASE driver: field %s: invalid field length\n", + mpl_tab_get_name(dca, k)); + longjmp(dbf->jump, 0); + } + dbf->len[k] = temp; + /* parse optional field precision */ + if (dbf->type[k] == 'N' && arg[j] == ',') + { j++; + temp = 0; + while (isdigit(arg[j])) + { if (temp > dbf->len[k]) break; + temp = 10 * temp + (arg[j] - '0'), j++; + } + if (temp > dbf->len[k]) + { xprintf("xBASE driver: field %s: invalid field precision" + "\n", mpl_tab_get_name(dca, k)); + longjmp(dbf->jump, 0); + } + dbf->prec[k] = temp; + } + else + dbf->prec[k] = 0; + /* check for right parenthesis */ + if (arg[j] == ')') + j++; + else + goto err; + } + /* ignore other specifications */ + return; +} + +static void write_byte(struct dbf *dbf, int b) +{ /* write byte to xBASE data file */ + fputc(b, dbf->fp); + dbf->offset++; + return; +} + +static void write_header(TABDCA *dca, struct dbf *dbf) +{ /* write xBASE data file header */ + int j, k, temp; + const char *name; + /* version number */ + write_byte(dbf, 0x03 /* file without DBT */); + /* date of last update (YYMMDD) */ + write_byte(dbf, 70 /* 1970 */); + write_byte(dbf, 1 /* January */); + write_byte(dbf, 1 /* 1st */); + /* number of records (unknown so far) */ + for (j = 1; j <= 4; j++) + write_byte(dbf, 0xFF); + /* length of the header, in bytes */ + temp = 32 + dbf->nf * 32 + 1; + write_byte(dbf, temp); + write_byte(dbf, temp >> 8); + /* length of each record, in bytes */ + temp = 1; + for (k = 1; k <= dbf->nf; k++) + temp += dbf->len[k]; + write_byte(dbf, temp); + write_byte(dbf, temp >> 8); + /* (reserved) */ + for (j = 1; j <= 20; j++) + write_byte(dbf, 0x00); + /* field descriptor array */ + for (k = 1; k <= dbf->nf; k++) + { /* field name (terminated by 0x00) */ + name = mpl_tab_get_name(dca, k); + for (j = 0; j < 10 && name[j] != '\0'; j++) + write_byte(dbf, name[j]); + for (j = j; j < 11; j++) + write_byte(dbf, 0x00); + /* field type */ + write_byte(dbf, dbf->type[k]); + /* (reserved) */ + for (j = 1; j <= 4; j++) + write_byte(dbf, 0x00); + /* field length */ + write_byte(dbf, dbf->len[k]); + /* field precision */ + write_byte(dbf, dbf->prec[k]); + /* (reserved) */ + for (j = 1; j <= 14; j++) + write_byte(dbf, 0x00); + } + /* end of header */ + write_byte(dbf, 0x0D); + return; +} + +static struct dbf *dbf_open_file(TABDCA *dca, int mode) +{ /* open xBASE data file */ + struct dbf *dbf; + /* create control structure */ + dbf = xmalloc(sizeof(struct dbf)); + dbf->mode = mode; + dbf->fname = NULL; + dbf->fp = NULL; + if (setjmp(dbf->jump)) goto fail; + dbf->offset = 0; + dbf->count = 0; + dbf->nf = 0; + /* try to open the xBASE data file */ + if (mpl_tab_num_args(dca) < 2) + { xprintf("xBASE driver: file name not specified\n"); + longjmp(dbf->jump, 0); + } + dbf->fname = xmalloc(strlen(mpl_tab_get_arg(dca, 2))+1); + strcpy(dbf->fname, mpl_tab_get_arg(dca, 2)); + if (mode == 'R') + { /* open the file for reading */ + dbf->fp = fopen(dbf->fname, "rb"); + if (dbf->fp == NULL) + { xprintf("xBASE driver: unable to open %s - %s\n", +#if 0 /* 29/I-2017 */ + dbf->fname, strerror(errno)); +#else + dbf->fname, xstrerr(errno)); +#endif + longjmp(dbf->jump, 0); + } + read_header(dca, dbf); + } + else if (mode == 'W') + { /* open the file for writing */ + if (mpl_tab_num_args(dca) < 3) + { xprintf("xBASE driver: file format not specified\n"); + longjmp(dbf->jump, 0); + } + parse_third_arg(dca, dbf); + dbf->fp = fopen(dbf->fname, "wb"); + if (dbf->fp == NULL) + { xprintf("xBASE driver: unable to create %s - %s\n", +#if 0 /* 29/I-2017 */ + dbf->fname, strerror(errno)); +#else + dbf->fname, xstrerr(errno)); +#endif + longjmp(dbf->jump, 0); + } + write_header(dca, dbf); + } + else + xassert(mode != mode); + /* the file has been open */ + return dbf; +fail: /* the file cannot be open */ + if (dbf->fname != NULL) xfree(dbf->fname); + if (dbf->fp != NULL) fclose(dbf->fp); + xfree(dbf); + return NULL; +} + +static int dbf_read_record(TABDCA *dca, struct dbf *dbf) +{ /* read next record from xBASE data file */ + int b, j, k, ret = 0; + char buf[DBF_FDLEN_MAX+1]; + xassert(dbf->mode == 'R'); + if (setjmp(dbf->jump)) + { ret = 1; + goto done; + } + /* check record flag */ + b = read_byte(dbf); + if (b == 0x1A) + { /* end of data */ + ret = -1; + goto done; + } + if (b != 0x20) + { xprintf("%s:0x%X: invalid record flag\n", dbf->fname, + dbf->offset); + longjmp(dbf->jump, 0); + } + /* read dummy RECNO field */ + if (dbf->ref[0] > 0) + mpl_tab_set_num(dca, dbf->ref[0], dbf->count+1); + /* read fields */ + for (k = 1; k <= dbf->nf; k++) + { /* read k-th field */ + for (j = 0; j < dbf->len[k]; j++) + buf[j] = (char)read_byte(dbf); + buf[dbf->len[k]] = '\0'; + /* set field value */ + if (dbf->type[k] == 'C') + { /* character field */ + if (dbf->ref[k] > 0) + mpl_tab_set_str(dca, dbf->ref[k], strtrim(buf)); + } + else if (dbf->type[k] == 'N') + { /* numeric field */ + if (dbf->ref[k] > 0) + { double num; + strspx(buf); + xassert(str2num(buf, &num) == 0); + mpl_tab_set_num(dca, dbf->ref[k], num); + } + } + else + xassert(dbf != dbf); + } + /* increase record count */ + dbf->count++; +done: return ret; +} + +static int dbf_write_record(TABDCA *dca, struct dbf *dbf) +{ /* write next record to xBASE data file */ + int j, k, ret = 0; + char buf[255+1]; + xassert(dbf->mode == 'W'); + if (setjmp(dbf->jump)) + { ret = 1; + goto done; + } + /* record flag */ + write_byte(dbf, 0x20); + xassert(dbf->nf == mpl_tab_num_flds(dca)); + for (k = 1; k <= dbf->nf; k++) + { if (dbf->type[k] == 'C') + { /* character field */ + const char *str; + if (mpl_tab_get_type(dca, k) == 'N') + { sprintf(buf, "%.*g", DBL_DIG, mpl_tab_get_num(dca, k)); + str = buf; + } + else if (mpl_tab_get_type(dca, k) == 'S') + str = mpl_tab_get_str(dca, k); + else + xassert(dca != dca); + if ((int)strlen(str) > dbf->len[k]) + { xprintf("xBASE driver: field %s: cannot convert %.15s..." + " to field format\n", mpl_tab_get_name(dca, k), str); + longjmp(dbf->jump, 0); + } + for (j = 0; j < dbf->len[k] && str[j] != '\0'; j++) + write_byte(dbf, str[j]); + for (j = j; j < dbf->len[k]; j++) + write_byte(dbf, ' '); + } + else if (dbf->type[k] == 'N') + { /* numeric field */ + double num = mpl_tab_get_num(dca, k); + if (fabs(num) > 1e20) +err: { xprintf("xBASE driver: field %s: cannot convert %g to fi" + "eld format\n", mpl_tab_get_name(dca, k), num); + longjmp(dbf->jump, 0); + } + sprintf(buf, "%*.*f", dbf->len[k], dbf->prec[k], num); + xassert(strlen(buf) < sizeof(buf)); + if ((int)strlen(buf) != dbf->len[k]) goto err; + for (j = 0; j < dbf->len[k]; j++) + write_byte(dbf, buf[j]); + } + else + xassert(dbf != dbf); + } + /* increase record count */ + dbf->count++; +done: return ret; +} + +static int dbf_close_file(TABDCA *dca, struct dbf *dbf) +{ /* close xBASE data file */ + int ret = 0; + xassert(dca == dca); + if (dbf->mode == 'W') + { if (setjmp(dbf->jump)) + { ret = 1; + goto skip; + } + /* end-of-file flag */ + write_byte(dbf, 0x1A); + /* number of records */ + dbf->offset = 4; + if (fseek(dbf->fp, dbf->offset, SEEK_SET)) + { xprintf("%s:0x%X: seek error - %s\n", dbf->fname, +#if 0 /* 29/I-2017 */ + dbf->offset, strerror(errno)); +#else + dbf->offset, xstrerr(errno)); +#endif + longjmp(dbf->jump, 0); + } + write_byte(dbf, dbf->count); + write_byte(dbf, dbf->count >> 8); + write_byte(dbf, dbf->count >> 16); + write_byte(dbf, dbf->count >> 24); + fflush(dbf->fp); + if (ferror(dbf->fp)) + { xprintf("%s:0x%X: write error - %s\n", dbf->fname, +#if 0 /* 29/I-2017 */ + dbf->offset, strerror(errno)); +#else + dbf->offset, xstrerr(errno)); +#endif + longjmp(dbf->jump, 0); + } +skip: ; + } + xfree(dbf->fname); + fclose(dbf->fp); + xfree(dbf); + return ret; +} + +/**********************************************************************/ + +#define TAB_CSV 1 +#define TAB_XBASE 2 +#define TAB_ODBC 3 +#define TAB_MYSQL 4 + +void mpl_tab_drv_open(MPL *mpl, int mode) +{ TABDCA *dca = mpl->dca; + xassert(dca->id == 0); + xassert(dca->link == NULL); + xassert(dca->na >= 1); + if (strcmp(dca->arg[1], "CSV") == 0) + { dca->id = TAB_CSV; + dca->link = csv_open_file(dca, mode); + } + else if (strcmp(dca->arg[1], "xBASE") == 0) + { dca->id = TAB_XBASE; + dca->link = dbf_open_file(dca, mode); + } + else if (strcmp(dca->arg[1], "ODBC") == 0 || + strcmp(dca->arg[1], "iODBC") == 0) + { dca->id = TAB_ODBC; + dca->link = db_iodbc_open(dca, mode); + } + else if (strcmp(dca->arg[1], "MySQL") == 0) + { dca->id = TAB_MYSQL; + dca->link = db_mysql_open(dca, mode); + } + else + xprintf("Invalid table driver '%s'\n", dca->arg[1]); + if (dca->link == NULL) + error(mpl, "error on opening table %s", + mpl->stmt->u.tab->name); + return; +} + +int mpl_tab_drv_read(MPL *mpl) +{ TABDCA *dca = mpl->dca; + int ret; + switch (dca->id) + { case TAB_CSV: + ret = csv_read_record(dca, dca->link); + break; + case TAB_XBASE: + ret = dbf_read_record(dca, dca->link); + break; + case TAB_ODBC: + ret = db_iodbc_read(dca, dca->link); + break; + case TAB_MYSQL: + ret = db_mysql_read(dca, dca->link); + break; + default: + xassert(dca != dca); + } + if (ret > 0) + error(mpl, "error on reading data from table %s", + mpl->stmt->u.tab->name); + return ret; +} + +void mpl_tab_drv_write(MPL *mpl) +{ TABDCA *dca = mpl->dca; + int ret; + switch (dca->id) + { case TAB_CSV: + ret = csv_write_record(dca, dca->link); + break; + case TAB_XBASE: + ret = dbf_write_record(dca, dca->link); + break; + case TAB_ODBC: + ret = db_iodbc_write(dca, dca->link); + break; + case TAB_MYSQL: + ret = db_mysql_write(dca, dca->link); + break; + default: + xassert(dca != dca); + } + if (ret) + error(mpl, "error on writing data to table %s", + mpl->stmt->u.tab->name); + return; +} + +void mpl_tab_drv_close(MPL *mpl) +{ TABDCA *dca = mpl->dca; + int ret; + switch (dca->id) + { case TAB_CSV: + ret = csv_close_file(dca, dca->link); + break; + case TAB_XBASE: + ret = dbf_close_file(dca, dca->link); + break; + case TAB_ODBC: + ret = db_iodbc_close(dca, dca->link); + break; + case TAB_MYSQL: + ret = db_mysql_close(dca, dca->link); + break; + default: + xassert(dca != dca); + } + dca->id = 0; + dca->link = NULL; + if (ret) + error(mpl, "error on closing table %s", + mpl->stmt->u.tab->name); + return; +} + +/* eof */ |