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Diffstat (limited to 'Build/source/utils/dialog/dialog-1.1-20100428/rc.c')
-rw-r--r--Build/source/utils/dialog/dialog-1.1-20100428/rc.c588
1 files changed, 588 insertions, 0 deletions
diff --git a/Build/source/utils/dialog/dialog-1.1-20100428/rc.c b/Build/source/utils/dialog/dialog-1.1-20100428/rc.c
new file mode 100644
index 00000000000..77dd586dfce
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+++ b/Build/source/utils/dialog/dialog-1.1-20100428/rc.c
@@ -0,0 +1,588 @@
+/*
+ * $Id: rc.c,v 1.45 2010/01/18 10:28:16 tom Exp $
+ *
+ * rc.c -- routines for processing the configuration file
+ *
+ * Copyright 2000-2008,2010 Thomas E. Dickey
+ *
+ * This program is free software; you can redistribute it and/or modify
+ * it under the terms of the GNU Lesser General Public License, version 2.1
+ * as published by the Free Software Foundation.
+ *
+ * This program 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
+ * Lesser General Public License for more details.
+ *
+ * You should have received a copy of the GNU Lesser General Public
+ * License along with this program; if not, write to
+ * Free Software Foundation, Inc.
+ * 51 Franklin St., Fifth Floor
+ * Boston, MA 02110, USA.
+ *
+ * An earlier version of this program lists as authors
+ * Savio Lam (lam836@cs.cuhk.hk)
+ */
+
+#include <dialog.h>
+
+#include <dlg_keys.h>
+
+#ifdef HAVE_COLOR
+#include <dlg_colors.h>
+
+/*
+ * For matching color names with color values
+ */
+static const color_names_st color_names[] =
+{
+#ifdef HAVE_USE_DEFAULT_COLORS
+ {"DEFAULT", -1},
+#endif
+ {"BLACK", COLOR_BLACK},
+ {"RED", COLOR_RED},
+ {"GREEN", COLOR_GREEN},
+ {"YELLOW", COLOR_YELLOW},
+ {"BLUE", COLOR_BLUE},
+ {"MAGENTA", COLOR_MAGENTA},
+ {"CYAN", COLOR_CYAN},
+ {"WHITE", COLOR_WHITE},
+}; /* color names */
+#define COLOR_COUNT (sizeof(color_names) / sizeof(color_names[0]))
+#endif /* HAVE_COLOR */
+
+#define GLOBALRC "/etc/dialogrc"
+#define DIALOGRC ".dialogrc"
+
+/* Types of values */
+#define VAL_INT 0
+#define VAL_STR 1
+#define VAL_BOOL 2
+
+/* Type of line in configuration file */
+typedef enum {
+ LINE_ERROR = -1,
+ LINE_EQUALS,
+ LINE_EMPTY
+} PARSE_LINE;
+
+/* number of configuration variables */
+#define VAR_COUNT (sizeof(vars) / sizeof(vars_st))
+
+/* check if character is white space */
+#define whitespace(c) (c == ' ' || c == TAB)
+
+/* check if character is string quoting characters */
+#define isquote(c) (c == '"' || c == '\'')
+
+/* get last character of string */
+#define lastch(str) str[strlen(str)-1]
+
+/*
+ * Configuration variables
+ */
+typedef struct {
+ const char *name; /* name of configuration variable as in DIALOGRC */
+ void *var; /* address of actual variable to change */
+ int type; /* type of value */
+ const char *comment; /* comment to put in "rc" file */
+} vars_st;
+
+/*
+ * This table should contain only references to dialog_state, since dialog_vars
+ * is reset specially in dialog.c before each widget.
+ */
+static const vars_st vars[] =
+{
+ {"aspect",
+ &dialog_state.aspect_ratio,
+ VAL_INT,
+ "Set aspect-ration."},
+
+ {"separate_widget",
+ &dialog_state.separate_str,
+ VAL_STR,
+ "Set separator (for multiple widgets output)."},
+
+ {"tab_len",
+ &dialog_state.tab_len,
+ VAL_INT,
+ "Set tab-length (for textbox tab-conversion)."},
+
+ {"visit_items",
+ &dialog_state.visit_items,
+ VAL_BOOL,
+ "Make tab-traversal for checklist, etc., include the list."},
+
+#ifdef HAVE_COLOR
+ {"use_shadow",
+ &dialog_state.use_shadow,
+ VAL_BOOL,
+ "Shadow dialog boxes? This also turns on color."},
+
+ {"use_colors",
+ &dialog_state.use_colors,
+ VAL_BOOL,
+ "Turn color support ON or OFF"},
+#endif /* HAVE_COLOR */
+}; /* vars */
+
+static int
+skip_whitespace(char *str, int n)
+{
+ while (whitespace(str[n]) && str[n] != '\0')
+ n++;
+ return n;
+}
+
+static int
+skip_keyword(char *str, int n)
+{
+ while (isalnum(UCH(str[n])) && str[n] != '\0')
+ n++;
+ return n;
+}
+
+static int
+find_vars(char *name)
+{
+ int result = -1;
+ unsigned i;
+
+ for (i = 0; i < VAR_COUNT; i++) {
+ if (dlg_strcmp(vars[i].name, name) == 0) {
+ result = (int) i;
+ break;
+ }
+ }
+ return result;
+}
+
+#ifdef HAVE_COLOR
+static int
+find_color(char *name)
+{
+ int result = -1;
+ int i;
+ int limit = dlg_color_count();
+
+ for (i = 0; i < limit; i++) {
+ if (dlg_strcmp(dlg_color_table[i].name, name) == 0) {
+ result = i;
+ break;
+ }
+ }
+ return result;
+}
+
+/*
+ * Convert an attribute to a string representation like this:
+ *
+ * "(foreground,background,highlight)"
+ */
+static char *
+attr_to_str(char *str, int fg, int bg, int hl)
+{
+ int i;
+
+ strcpy(str, "(");
+ /* foreground */
+ for (i = 0; fg != color_names[i].value; i++) ;
+ strcat(str, color_names[i].name);
+ strcat(str, ",");
+
+ /* background */
+ for (i = 0; bg != color_names[i].value; i++) ;
+ strcat(str, color_names[i].name);
+
+ /* highlight */
+ strcat(str, hl ? ",ON)" : ",OFF)");
+
+ return str;
+}
+
+/*
+ * Extract the foreground, background and highlight values from an attribute
+ * represented as a string in this form:
+ *
+ * "(foreground,background,highlight)"
+ */
+static int
+str_to_attr(char *str, int *fg, int *bg, int *hl)
+{
+ int i = 0, get_fg = 1;
+ unsigned j;
+ char tempstr[MAX_LEN + 1], *part;
+
+ if (str[0] != '(' || lastch(str) != ')')
+ return -1; /* invalid representation */
+
+ /* remove the parenthesis */
+ strcpy(tempstr, str + 1);
+ lastch(tempstr) = '\0';
+
+ /* get foreground and background */
+
+ while (1) {
+ /* skip white space before fg/bg string */
+ i = skip_whitespace(tempstr, i);
+ if (tempstr[i] == '\0')
+ return -1; /* invalid representation */
+ part = tempstr + i; /* set 'part' to start of fg/bg string */
+
+ /* find end of fg/bg string */
+ while (!whitespace(tempstr[i]) && tempstr[i] != ','
+ && tempstr[i] != '\0')
+ i++;
+
+ if (tempstr[i] == '\0')
+ return -1; /* invalid representation */
+ else if (whitespace(tempstr[i])) { /* not yet ',' */
+ tempstr[i++] = '\0';
+
+ /* skip white space before ',' */
+ i = skip_whitespace(tempstr, i);
+ if (tempstr[i] != ',')
+ return -1; /* invalid representation */
+ }
+ tempstr[i++] = '\0'; /* skip the ',' */
+ for (j = 0; j < COLOR_COUNT && dlg_strcmp(part, color_names[j].name);
+ j++) ;
+ if (j == COLOR_COUNT) /* invalid color name */
+ return -1;
+ if (get_fg) {
+ *fg = color_names[j].value;
+ get_fg = 0; /* next we have to get the background */
+ } else {
+ *bg = color_names[j].value;
+ break;
+ }
+ } /* got foreground and background */
+
+ /* get highlight */
+
+ /* skip white space before highlight string */
+ i = skip_whitespace(tempstr, i);
+ if (tempstr[i] == '\0')
+ return -1; /* invalid representation */
+ part = tempstr + i; /* set 'part' to start of highlight string */
+
+ /* trim trailing white space from highlight string */
+ i = (int) strlen(part) - 1;
+ while (whitespace(part[i]) && i > 0)
+ i--;
+ part[i + 1] = '\0';
+
+ if (!dlg_strcmp(part, "ON"))
+ *hl = TRUE;
+ else if (!dlg_strcmp(part, "OFF"))
+ *hl = FALSE;
+ else
+ return -1; /* invalid highlight value */
+
+ return 0;
+}
+#endif /* HAVE_COLOR */
+
+/*
+ * Check if the line begins with a special keyword; if so, return true while
+ * pointing params to its parameters.
+ */
+static int
+begins_with(char *line, const char *keyword, char **params)
+{
+ int i = skip_whitespace(line, 0);
+ int j = skip_keyword(line, i);
+
+ if ((j - i) == (int) strlen(keyword)) {
+ char save = line[j];
+ line[j] = 0;
+ if (!dlg_strcmp(keyword, line + i)) {
+ *params = line + skip_whitespace(line, j + 1);
+ return 1;
+ }
+ line[j] = save;
+ }
+
+ return 0;
+}
+
+/*
+ * Parse a line in the configuration file
+ *
+ * Each line is of the form: "variable = value". On exit, 'var' will contain
+ * the variable name, and 'value' will contain the value string.
+ *
+ * Return values:
+ *
+ * LINE_EMPTY - line is blank or comment
+ * LINE_EQUALS - line contains "variable = value"
+ * LINE_ERROR - syntax error in line
+ */
+static PARSE_LINE
+parse_line(char *line, char **var, char **value)
+{
+ int i = 0;
+
+ /* ignore white space at beginning of line */
+ i = skip_whitespace(line, i);
+
+ if (line[i] == '\0') /* line is blank */
+ return LINE_EMPTY;
+ else if (line[i] == '#') /* line is comment */
+ return LINE_EMPTY;
+ else if (line[i] == '=') /* variable names cannot start with a '=' */
+ return LINE_ERROR;
+
+ /* set 'var' to variable name */
+ *var = line + i++; /* skip to next character */
+
+ /* find end of variable name */
+ while (!whitespace(line[i]) && line[i] != '=' && line[i] != '\0')
+ i++;
+
+ if (line[i] == '\0') /* syntax error */
+ return LINE_ERROR;
+ else if (line[i] == '=')
+ line[i++] = '\0';
+ else {
+ line[i++] = '\0';
+
+ /* skip white space before '=' */
+ i = skip_whitespace(line, i);
+
+ if (line[i] != '=') /* syntax error */
+ return LINE_ERROR;
+ else
+ i++; /* skip the '=' */
+ }
+
+ /* skip white space after '=' */
+ i = skip_whitespace(line, i);
+
+ if (line[i] == '\0')
+ return LINE_ERROR;
+ else
+ *value = line + i; /* set 'value' to value string */
+
+ /* trim trailing white space from 'value' */
+ i = (int) strlen(*value) - 1;
+ while (whitespace((*value)[i]) && i > 0)
+ i--;
+ (*value)[i + 1] = '\0';
+
+ return LINE_EQUALS; /* no syntax error in line */
+}
+
+/*
+ * Create the configuration file
+ */
+void
+dlg_create_rc(const char *filename)
+{
+ unsigned i;
+ FILE *rc_file;
+
+ if ((rc_file = fopen(filename, "wt")) == NULL)
+ dlg_exiterr("Error opening file for writing in dlg_create_rc().");
+
+ fprintf(rc_file, "#\n\
+# Run-time configuration file for dialog\n\
+#\n\
+# Automatically generated by \"dialog --create-rc <file>\"\n\
+#\n\
+#\n\
+# Types of values:\n\
+#\n\
+# Number - <number>\n\
+# String - \"string\"\n\
+# Boolean - <ON|OFF>\n"
+#ifdef HAVE_COLOR
+ "\
+# Attribute - (foreground,background,highlight?)\n"
+#endif
+ );
+
+ /* Print an entry for each configuration variable */
+ for (i = 0; i < VAR_COUNT; i++) {
+ fprintf(rc_file, "\n# %s\n", vars[i].comment);
+ switch (vars[i].type) {
+ case VAL_INT:
+ fprintf(rc_file, "%s = %d\n", vars[i].name,
+ *((int *) vars[i].var));
+ break;
+ case VAL_STR:
+ fprintf(rc_file, "%s = \"%s\"\n", vars[i].name,
+ (char *) vars[i].var);
+ break;
+ case VAL_BOOL:
+ fprintf(rc_file, "%s = %s\n", vars[i].name,
+ *((bool *) vars[i].var) ? "ON" : "OFF");
+ break;
+ }
+ }
+#ifdef HAVE_COLOR
+ for (i = 0; i < (unsigned) dlg_color_count(); ++i) {
+ char buffer[MAX_LEN + 1];
+
+ fprintf(rc_file, "\n# %s\n", dlg_color_table[i].comment);
+ fprintf(rc_file, "%s = %s\n", dlg_color_table[i].name,
+ attr_to_str(buffer,
+ dlg_color_table[i].fg,
+ dlg_color_table[i].bg,
+ dlg_color_table[i].hilite));
+ }
+#endif /* HAVE_COLOR */
+#if 1
+ dlg_dump_keys(rc_file);
+#endif
+
+ (void) fclose(rc_file);
+}
+
+/*
+ * Parse the configuration file and set up variables
+ */
+int
+dlg_parse_rc(void)
+{
+ int i;
+ int l = 1;
+ PARSE_LINE parse;
+ char str[MAX_LEN + 1];
+ char *var;
+ char *value;
+ char *tempptr;
+ int result = 0;
+ FILE *rc_file = 0;
+#if 1
+ char *params;
+#endif
+
+ /*
+ * At startup, dialog determines the settings to use as follows:
+ *
+ * a) if the environment variable $DIALOGRC is set, its value determines
+ * the name of the configuration file.
+ *
+ * b) if the file in (a) can't be found, use the file $HOME/.dialogrc
+ * as the configuration file.
+ *
+ * c) if the file in (b) can't be found, try using the GLOBALRC file.
+ * Usually this will be /etc/dialogrc.
+ *
+ * d) if the file in (c) cannot be found, use the compiled-in defaults.
+ */
+
+ /* try step (a) */
+ if ((tempptr = getenv("DIALOGRC")) != NULL)
+ rc_file = fopen(tempptr, "rt");
+
+ if (rc_file == NULL) { /* step (a) failed? */
+ /* try step (b) */
+ if ((tempptr = getenv("HOME")) != NULL
+ && strlen(tempptr) < MAX_LEN - (sizeof(DIALOGRC) + 3)) {
+ if (tempptr[0] == '\0' || lastch(tempptr) == '/')
+ sprintf(str, "%s%s", tempptr, DIALOGRC);
+ else
+ sprintf(str, "%s/%s", tempptr, DIALOGRC);
+ rc_file = fopen(str, "rt");
+ }
+ }
+
+ if (rc_file == NULL) { /* step (b) failed? */
+ /* try step (c) */
+ strcpy(str, GLOBALRC);
+ if ((rc_file = fopen(str, "rt")) == NULL)
+ return 0; /* step (c) failed, use default values */
+ }
+
+ /* Scan each line and set variables */
+ while ((result == 0) && (fgets(str, MAX_LEN, rc_file) != NULL)) {
+ dlg_trace_msg("rc:%s\n", str);
+ if (*str == '\0' || lastch(str) != '\n') {
+ /* ignore rest of file if line too long */
+ fprintf(stderr, "\nParse error: line %d of configuration"
+ " file too long.\n", l);
+ result = -1; /* parse aborted */
+ break;
+ }
+
+ lastch(str) = '\0';
+ if (begins_with(str, "bindkey", &params)) {
+ dlg_parse_bindkey(params);
+ continue;
+ }
+ parse = parse_line(str, &var, &value); /* parse current line */
+
+ switch (parse) {
+ case LINE_EMPTY: /* ignore blank lines and comments */
+ break;
+ case LINE_EQUALS:
+ /* search table for matching config variable name */
+ if ((i = find_vars(var)) >= 0) {
+ switch (vars[i].type) {
+ case VAL_INT:
+ *((int *) vars[i].var) = atoi(value);
+ break;
+ case VAL_STR:
+ if (!isquote(value[0]) || !isquote(lastch(value))
+ || strlen(value) < 2) {
+ fprintf(stderr, "\nParse error: string value "
+ "expected at line %d of configuration "
+ "file.\n", l);
+ result = -1; /* parse aborted */
+ } else {
+ /* remove the (") quotes */
+ value++;
+ lastch(value) = '\0';
+ strcpy((char *) vars[i].var, value);
+ }
+ break;
+ case VAL_BOOL:
+ if (!dlg_strcmp(value, "ON"))
+ *((bool *) vars[i].var) = TRUE;
+ else if (!dlg_strcmp(value, "OFF"))
+ *((bool *) vars[i].var) = FALSE;
+ else {
+ fprintf(stderr, "\nParse error: boolean value "
+ "expected at line %d of configuration "
+ "file (found %s).\n", l, value);
+ result = -1; /* parse aborted */
+ }
+ break;
+ }
+#ifdef HAVE_COLOR
+ } else if ((i = find_color(var)) >= 0) {
+ int fg = 0;
+ int bg = 0;
+ int hl = 0;
+ if (str_to_attr(value, &fg, &bg, &hl) == -1) {
+ fprintf(stderr, "\nParse error: attribute "
+ "value expected at line %d of configuration "
+ "file.\n", l);
+ result = -1; /* parse aborted */
+ } else {
+ dlg_color_table[i].fg = fg;
+ dlg_color_table[i].bg = bg;
+ dlg_color_table[i].hilite = hl;
+ }
+ } else {
+#endif /* HAVE_COLOR */
+ fprintf(stderr, "\nParse error: unknown variable "
+ "at line %d of configuration file:\n\t%s\n", l, var);
+ result = -1; /* parse aborted */
+ }
+ break;
+ case LINE_ERROR:
+ fprintf(stderr, "\nParse error: syntax error at line %d of "
+ "configuration file.\n", l);
+ result = -1; /* parse aborted */
+ break;
+ }
+ l++; /* next line */
+ }
+
+ (void) fclose(rc_file);
+ return result;
+}
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