/* Output generating routines for GDB. Copyright (C) 1999-2002, 2004-2005, 2007-2012 Free Software Foundation, Inc. Contributed by Cygnus Solutions. Written by Fernando Nasser for Cygnus. This file is part of GDB. 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 the Free Software Foundation; either version 3 of the License, or (at your option) any later version. 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 General Public License for more details. You should have received a copy of the GNU General Public License along with this program. If not, see <http://www.gnu.org/licenses/>. */ #include "defs.h" #include "gdb_string.h" #include "expression.h" /* For language.h */ #include "language.h" #include "ui-out.h" #include "gdb_assert.h" /* table header structures */ struct ui_out_hdr { int colno; int width; int alignment; char *col_name; char *colhdr; struct ui_out_hdr *next; }; /* Maintain a stack so that the info applicable to the inner most list is always available. Stack/nested level 0 is reserved for the top-level result. */ enum { MAX_UI_OUT_LEVELS = 8 }; struct ui_out_level { /* Count each field; the first element is for non-list fields. */ int field_count; /* The type of this level. */ enum ui_out_type type; }; /* Tables are special. Maintain a separate structure that tracks their state. At present an output can only contain a single table but that restriction might eventually be lifted. */ struct ui_out_table { /* If on, a table is being generated. */ int flag; /* If on, the body of a table is being generated. If off, the table header is being generated. */ int body_flag; /* The level at which each entry of the table is to be found. A row (a tuple) is made up of entries. Consequently ENTRY_LEVEL is one above that of the table. */ int entry_level; /* Number of table columns (as specified in the table_begin call). */ int columns; /* String identifying the table (as specified in the table_begin call). */ char *id; /* Points to the first table header (if any). */ struct ui_out_hdr *header_first; /* Points to the last table header (if any). */ struct ui_out_hdr *header_last; /* Points to header of NEXT column to format. */ struct ui_out_hdr *header_next; }; /* The ui_out structure */ /* Any change here requires a corresponding one in the initialization of the default uiout, which is statically initialized. */ struct ui_out { int flags; /* Specific implementation of ui-out. */ struct ui_out_impl *impl; void *data; /* Sub structure tracking the ui-out depth. */ int level; struct ui_out_level levels[MAX_UI_OUT_LEVELS]; /* A table, if any. At present only a single table is supported. */ struct ui_out_table table; }; /* The current (inner most) level. */ static struct ui_out_level * current_level (struct ui_out *uiout) { return &uiout->levels[uiout->level]; } /* Create a new level, of TYPE. Return the new level's index. */ static int push_level (struct ui_out *uiout, enum ui_out_type type, const char *id) { struct ui_out_level *current; /* We had better not overflow the buffer. */ uiout->level++; gdb_assert (uiout->level >= 0 && uiout->level < MAX_UI_OUT_LEVELS); current = current_level (uiout); current->field_count = 0; current->type = type; return uiout->level; } /* Discard the current level, return the discarded level's index. TYPE is the type of the level being discarded. */ static int pop_level (struct ui_out *uiout, enum ui_out_type type) { /* We had better not underflow the buffer. */ gdb_assert (uiout->level > 0 && uiout->level < MAX_UI_OUT_LEVELS); gdb_assert (current_level (uiout)->type == type); uiout->level--; return uiout->level + 1; } /* These are the default implementation functions. */ static void default_table_begin (struct ui_out *uiout, int nbrofcols, int nr_rows, const char *tblid); static void default_table_body (struct ui_out *uiout); static void default_table_end (struct ui_out *uiout); static void default_table_header (struct ui_out *uiout, int width, enum ui_align alig, const char *col_name, const char *colhdr); static void default_begin (struct ui_out *uiout, enum ui_out_type type, int level, const char *id); static void default_end (struct ui_out *uiout, enum ui_out_type type, int level); static void default_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align alig, const char *fldname, int value); static void default_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align alig, const char *fldname); static void default_field_string (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, const char *string); static void default_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, const char *format, va_list args) ATTRIBUTE_PRINTF (6, 0); static void default_spaces (struct ui_out *uiout, int numspaces); static void default_text (struct ui_out *uiout, const char *string); static void default_message (struct ui_out *uiout, int verbosity, const char *format, va_list args) ATTRIBUTE_PRINTF (3, 0); static void default_wrap_hint (struct ui_out *uiout, char *identstring); static void default_flush (struct ui_out *uiout); /* This is the default ui-out implementation functions vector. */ struct ui_out_impl default_ui_out_impl = { default_table_begin, default_table_body, default_table_end, default_table_header, default_begin, default_end, default_field_int, default_field_skip, default_field_string, default_field_fmt, default_spaces, default_text, default_message, default_wrap_hint, default_flush, NULL, 0, /* Does not need MI hacks. */ }; /* The default ui_out */ struct ui_out def_uiout = { 0, /* flags */ &default_ui_out_impl, /* impl */ }; /* Pointer to current ui_out */ /* FIXME: This should not be a global, but something passed down from main.c or top.c. */ struct ui_out *current_uiout = &def_uiout; /* These are the interfaces to implementation functions. */ static void uo_table_begin (struct ui_out *uiout, int nbrofcols, int nr_rows, const char *tblid); static void uo_table_body (struct ui_out *uiout); static void uo_table_end (struct ui_out *uiout); static void uo_table_header (struct ui_out *uiout, int width, enum ui_align align, const char *col_name, const char *colhdr); static void uo_begin (struct ui_out *uiout, enum ui_out_type type, int level, const char *id); static void uo_end (struct ui_out *uiout, enum ui_out_type type, int level); static void uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, int value); static void uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname); static void uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, const char *format, va_list args) ATTRIBUTE_PRINTF (6, 0); static void uo_spaces (struct ui_out *uiout, int numspaces); static void uo_text (struct ui_out *uiout, const char *string); static void uo_message (struct ui_out *uiout, int verbosity, const char *format, va_list args) ATTRIBUTE_PRINTF (3, 0); static void uo_wrap_hint (struct ui_out *uiout, char *identstring); static void uo_flush (struct ui_out *uiout); static int uo_redirect (struct ui_out *uiout, struct ui_file *outstream); /* Prototypes for local functions */ extern void _initialize_ui_out (void); static void append_header_to_list (struct ui_out *uiout, int width, int alignment, const char *col_name, const char *colhdr); static int get_next_header (struct ui_out *uiout, int *colno, int *width, int *alignment, char **colhdr); static void clear_header_list (struct ui_out *uiout); static void verify_field (struct ui_out *uiout, int *fldno, int *width, int *align); /* exported functions (ui_out API) */ /* Mark beginning of a table. */ static void ui_out_table_begin (struct ui_out *uiout, int nbrofcols, int nr_rows, const char *tblid) { if (uiout->table.flag) internal_error (__FILE__, __LINE__, _("tables cannot be nested; table_begin found before \ previous table_end.")); uiout->table.flag = 1; uiout->table.body_flag = 0; uiout->table.entry_level = uiout->level + 1; uiout->table.columns = nbrofcols; if (tblid != NULL) uiout->table.id = xstrdup (tblid); else uiout->table.id = NULL; clear_header_list (uiout); uo_table_begin (uiout, nbrofcols, nr_rows, uiout->table.id); } void ui_out_table_body (struct ui_out *uiout) { if (!uiout->table.flag) internal_error (__FILE__, __LINE__, _("table_body outside a table is not valid; it must be \ after a table_begin and before a table_end.")); if (uiout->table.body_flag) internal_error (__FILE__, __LINE__, _("extra table_body call not allowed; there must be \ only one table_body after a table_begin and before a table_end.")); if (uiout->table.header_next->colno != uiout->table.columns) internal_error (__FILE__, __LINE__, _("number of headers differ from number of table \ columns.")); uiout->table.body_flag = 1; uiout->table.header_next = uiout->table.header_first; uo_table_body (uiout); } static void ui_out_table_end (struct ui_out *uiout) { if (!uiout->table.flag) internal_error (__FILE__, __LINE__, _("misplaced table_end or missing table_begin.")); uiout->table.entry_level = 0; uiout->table.body_flag = 0; uiout->table.flag = 0; uo_table_end (uiout); if (uiout->table.id) xfree (uiout->table.id); clear_header_list (uiout); } void ui_out_table_header (struct ui_out *uiout, int width, enum ui_align alignment, const char *col_name, const char *colhdr) { if (!uiout->table.flag || uiout->table.body_flag) internal_error (__FILE__, __LINE__, _("table header must be specified after table_begin \ and before table_body.")); append_header_to_list (uiout, width, alignment, col_name, colhdr); uo_table_header (uiout, width, alignment, col_name, colhdr); } static void do_cleanup_table_end (void *data) { struct ui_out *ui_out = data; ui_out_table_end (ui_out); } struct cleanup * make_cleanup_ui_out_table_begin_end (struct ui_out *ui_out, int nr_cols, int nr_rows, const char *tblid) { ui_out_table_begin (ui_out, nr_cols, nr_rows, tblid); return make_cleanup (do_cleanup_table_end, ui_out); } void ui_out_begin (struct ui_out *uiout, enum ui_out_type type, const char *id) { int new_level; if (uiout->table.flag && !uiout->table.body_flag) internal_error (__FILE__, __LINE__, _("table header or table_body expected; lists must be \ specified after table_body.")); /* Be careful to verify the ``field'' before the new tuple/list is pushed onto the stack. That way the containing list/table/row is verified and not the newly created tuple/list. This verification is needed (at least) for the case where a table row entry contains either a tuple/list. For that case bookkeeping such as updating the column count or advancing to the next heading still needs to be performed. */ { int fldno; int width; int align; verify_field (uiout, &fldno, &width, &align); } new_level = push_level (uiout, type, id); /* If the push puts us at the same level as a table row entry, we've got a new table row. Put the header pointer back to the start. */ if (uiout->table.body_flag && uiout->table.entry_level == new_level) uiout->table.header_next = uiout->table.header_first; uo_begin (uiout, type, new_level, id); } void ui_out_end (struct ui_out *uiout, enum ui_out_type type) { int old_level = pop_level (uiout, type); uo_end (uiout, type, old_level); } struct ui_out_end_cleanup_data { struct ui_out *uiout; enum ui_out_type type; }; static void do_cleanup_end (void *data) { struct ui_out_end_cleanup_data *end_cleanup_data = data; ui_out_end (end_cleanup_data->uiout, end_cleanup_data->type); xfree (end_cleanup_data); } static struct cleanup * make_cleanup_ui_out_end (struct ui_out *uiout, enum ui_out_type type) { struct ui_out_end_cleanup_data *end_cleanup_data; end_cleanup_data = XMALLOC (struct ui_out_end_cleanup_data); end_cleanup_data->uiout = uiout; end_cleanup_data->type = type; return make_cleanup (do_cleanup_end, end_cleanup_data); } struct cleanup * make_cleanup_ui_out_tuple_begin_end (struct ui_out *uiout, const char *id) { ui_out_begin (uiout, ui_out_type_tuple, id); return make_cleanup_ui_out_end (uiout, ui_out_type_tuple); } struct cleanup * make_cleanup_ui_out_list_begin_end (struct ui_out *uiout, const char *id) { ui_out_begin (uiout, ui_out_type_list, id); return make_cleanup_ui_out_end (uiout, ui_out_type_list); } void ui_out_field_int (struct ui_out *uiout, const char *fldname, int value) { int fldno; int width; int align; verify_field (uiout, &fldno, &width, &align); uo_field_int (uiout, fldno, width, align, fldname, value); } void ui_out_field_fmt_int (struct ui_out *uiout, int input_width, enum ui_align input_align, const char *fldname, int value) { int fldno; int width; int align; verify_field (uiout, &fldno, &width, &align); uo_field_int (uiout, fldno, input_width, input_align, fldname, value); } /* Documented in ui-out.h. */ void ui_out_field_core_addr (struct ui_out *uiout, const char *fldname, struct gdbarch *gdbarch, CORE_ADDR address) { ui_out_field_string (uiout, fldname, print_core_address (gdbarch, address)); } void ui_out_field_stream (struct ui_out *uiout, const char *fldname, struct ui_file *stream) { long length; char *buffer = ui_file_xstrdup (stream, &length); struct cleanup *old_cleanup = make_cleanup (xfree, buffer); if (length > 0) ui_out_field_string (uiout, fldname, buffer); else ui_out_field_skip (uiout, fldname); ui_file_rewind (stream); do_cleanups (old_cleanup); } /* Used to omit a field. */ void ui_out_field_skip (struct ui_out *uiout, const char *fldname) { int fldno; int width; int align; verify_field (uiout, &fldno, &width, &align); uo_field_skip (uiout, fldno, width, align, fldname); } void ui_out_field_string (struct ui_out *uiout, const char *fldname, const char *string) { int fldno; int width; int align; verify_field (uiout, &fldno, &width, &align); uo_field_string (uiout, fldno, width, align, fldname, string); } /* VARARGS */ void ui_out_field_fmt (struct ui_out *uiout, const char *fldname, const char *format, ...) { va_list args; int fldno; int width; int align; /* Will not align, but has to call anyway. */ verify_field (uiout, &fldno, &width, &align); va_start (args, format); uo_field_fmt (uiout, fldno, width, align, fldname, format, args); va_end (args); } void ui_out_spaces (struct ui_out *uiout, int numspaces) { uo_spaces (uiout, numspaces); } void ui_out_text (struct ui_out *uiout, const char *string) { uo_text (uiout, string); } void ui_out_message (struct ui_out *uiout, int verbosity, const char *format,...) { va_list args; va_start (args, format); uo_message (uiout, verbosity, format, args); va_end (args); } void ui_out_wrap_hint (struct ui_out *uiout, char *identstring) { uo_wrap_hint (uiout, identstring); } void ui_out_flush (struct ui_out *uiout) { uo_flush (uiout); } int ui_out_redirect (struct ui_out *uiout, struct ui_file *outstream) { return uo_redirect (uiout, outstream); } /* Set the flags specified by the mask given. */ int ui_out_set_flags (struct ui_out *uiout, int mask) { int oldflags = uiout->flags; uiout->flags |= mask; return oldflags; } /* Clear the flags specified by the mask given. */ int ui_out_clear_flags (struct ui_out *uiout, int mask) { int oldflags = uiout->flags; uiout->flags &= ~mask; return oldflags; } /* Test the flags against the mask given. */ int ui_out_test_flags (struct ui_out *uiout, int mask) { return (uiout->flags & mask); } /* Obtain the current verbosity level (as stablished by the 'set verbositylevel' command. */ int ui_out_get_verblvl (struct ui_out *uiout) { /* FIXME: not implemented yet. */ return 0; } #if 0 void ui_out_result_begin (struct ui_out *uiout, char *class) { } void ui_out_result_end (struct ui_out *uiout) { } void ui_out_info_begin (struct ui_out *uiout, char *class) { } void ui_out_info_end (struct ui_out *uiout) { } void ui_out_notify_begin (struct ui_out *uiout, char *class) { } void ui_out_notify_end (struct ui_out *uiout) { } void ui_out_error_begin (struct ui_out *uiout, char *class) { } void ui_out_error_end (struct ui_out *uiout) { } #endif #if 0 void gdb_error (ui_out * uiout, int severity, char *format,...) { va_list args; } void gdb_query (struct ui_out *uiout, int qflags, char *qprompt) { } #endif int ui_out_is_mi_like_p (struct ui_out *uiout) { return uiout->impl->is_mi_like_p; } /* Default gdb-out hook functions. */ static void default_table_begin (struct ui_out *uiout, int nbrofcols, int nr_rows, const char *tblid) { } static void default_table_body (struct ui_out *uiout) { } static void default_table_end (struct ui_out *uiout) { } static void default_table_header (struct ui_out *uiout, int width, enum ui_align alignment, const char *col_name, const char *colhdr) { } static void default_begin (struct ui_out *uiout, enum ui_out_type type, int level, const char *id) { } static void default_end (struct ui_out *uiout, enum ui_out_type type, int level) { } static void default_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, int value) { } static void default_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname) { } static void default_field_string (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, const char *string) { } static void default_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, const char *format, va_list args) { } static void default_spaces (struct ui_out *uiout, int numspaces) { } static void default_text (struct ui_out *uiout, const char *string) { } static void default_message (struct ui_out *uiout, int verbosity, const char *format, va_list args) { } static void default_wrap_hint (struct ui_out *uiout, char *identstring) { } static void default_flush (struct ui_out *uiout) { } /* Interface to the implementation functions. */ void uo_table_begin (struct ui_out *uiout, int nbrofcols, int nr_rows, const char *tblid) { if (!uiout->impl->table_begin) return; uiout->impl->table_begin (uiout, nbrofcols, nr_rows, tblid); } void uo_table_body (struct ui_out *uiout) { if (!uiout->impl->table_body) return; uiout->impl->table_body (uiout); } void uo_table_end (struct ui_out *uiout) { if (!uiout->impl->table_end) return; uiout->impl->table_end (uiout); } void uo_table_header (struct ui_out *uiout, int width, enum ui_align align, const char *col_name, const char *colhdr) { if (!uiout->impl->table_header) return; uiout->impl->table_header (uiout, width, align, col_name, colhdr); } void uo_begin (struct ui_out *uiout, enum ui_out_type type, int level, const char *id) { if (uiout->impl->begin == NULL) return; uiout->impl->begin (uiout, type, level, id); } void uo_end (struct ui_out *uiout, enum ui_out_type type, int level) { if (uiout->impl->end == NULL) return; uiout->impl->end (uiout, type, level); } void uo_field_int (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, int value) { if (!uiout->impl->field_int) return; uiout->impl->field_int (uiout, fldno, width, align, fldname, value); } void uo_field_skip (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname) { if (!uiout->impl->field_skip) return; uiout->impl->field_skip (uiout, fldno, width, align, fldname); } void uo_field_string (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, const char *string) { if (!uiout->impl->field_string) return; uiout->impl->field_string (uiout, fldno, width, align, fldname, string); } void uo_field_fmt (struct ui_out *uiout, int fldno, int width, enum ui_align align, const char *fldname, const char *format, va_list args) { if (!uiout->impl->field_fmt) return; uiout->impl->field_fmt (uiout, fldno, width, align, fldname, format, args); } void uo_spaces (struct ui_out *uiout, int numspaces) { if (!uiout->impl->spaces) return; uiout->impl->spaces (uiout, numspaces); } void uo_text (struct ui_out *uiout, const char *string) { if (!uiout->impl->text) return; uiout->impl->text (uiout, string); } void uo_message (struct ui_out *uiout, int verbosity, const char *format, va_list args) { if (!uiout->impl->message) return; uiout->impl->message (uiout, verbosity, format, args); } void uo_wrap_hint (struct ui_out *uiout, char *identstring) { if (!uiout->impl->wrap_hint) return; uiout->impl->wrap_hint (uiout, identstring); } void uo_flush (struct ui_out *uiout) { if (!uiout->impl->flush) return; uiout->impl->flush (uiout); } int uo_redirect (struct ui_out *uiout, struct ui_file *outstream) { if (!uiout->impl->redirect) return -1; uiout->impl->redirect (uiout, outstream); return 0; } /* local functions */ /* List of column headers manipulation routines. */ static void clear_header_list (struct ui_out *uiout) { while (uiout->table.header_first != NULL) { uiout->table.header_next = uiout->table.header_first; uiout->table.header_first = uiout->table.header_first->next; if (uiout->table.header_next->colhdr != NULL) xfree (uiout->table.header_next->colhdr); xfree (uiout->table.header_next); } gdb_assert (uiout->table.header_first == NULL); uiout->table.header_last = NULL; uiout->table.header_next = NULL; } static void append_header_to_list (struct ui_out *uiout, int width, int alignment, const char *col_name, const char *colhdr) { struct ui_out_hdr *temphdr; temphdr = XMALLOC (struct ui_out_hdr); temphdr->width = width; temphdr->alignment = alignment; /* We have to copy the column title as the original may be an automatic. */ if (colhdr != NULL) temphdr->colhdr = xstrdup (colhdr); else temphdr->colhdr = NULL; if (col_name != NULL) temphdr->col_name = xstrdup (col_name); else if (colhdr != NULL) temphdr->col_name = xstrdup (colhdr); else temphdr->col_name = NULL; temphdr->next = NULL; if (uiout->table.header_first == NULL) { temphdr->colno = 1; uiout->table.header_first = temphdr; uiout->table.header_last = temphdr; } else { temphdr->colno = uiout->table.header_last->colno + 1; uiout->table.header_last->next = temphdr; uiout->table.header_last = temphdr; } uiout->table.header_next = uiout->table.header_last; } /* Extract the format information for the NEXT header and advance the header pointer. Return 0 if there was no next header. */ static int get_next_header (struct ui_out *uiout, int *colno, int *width, int *alignment, char **colhdr) { /* There may be no headers at all or we may have used all columns. */ if (uiout->table.header_next == NULL) return 0; *colno = uiout->table.header_next->colno; *width = uiout->table.header_next->width; *alignment = uiout->table.header_next->alignment; *colhdr = uiout->table.header_next->colhdr; /* Advance the header pointer to the next entry. */ uiout->table.header_next = uiout->table.header_next->next; return 1; } /* Verify that the field/tuple/list is correctly positioned. Return the field number and corresponding alignment (if available/applicable). */ static void verify_field (struct ui_out *uiout, int *fldno, int *width, int *align) { struct ui_out_level *current = current_level (uiout); char *text; if (uiout->table.flag) { if (!uiout->table.body_flag) internal_error (__FILE__, __LINE__, _("table_body missing; table fields must be \ specified after table_body and inside a list.")); /* NOTE: cagney/2001-12-08: There was a check here to ensure that this code was only executed when uiout->level was greater than zero. That no longer applies - this code is run before each table row tuple is started and at that point the level is zero. */ } current->field_count += 1; if (uiout->table.body_flag && uiout->table.entry_level == uiout->level && get_next_header (uiout, fldno, width, align, &text)) { if (*fldno != current->field_count) internal_error (__FILE__, __LINE__, _("ui-out internal error in handling headers.")); } else { *width = 0; *align = ui_noalign; *fldno = current->field_count; } } /* Access to ui-out members data. */ void * ui_out_data (struct ui_out *uiout) { return uiout->data; } /* Access table field parameters. */ int ui_out_query_field (struct ui_out *uiout, int colno, int *width, int *alignment, char **col_name) { struct ui_out_hdr *hdr; if (!uiout->table.flag) return 0; for (hdr = uiout->table.header_first; hdr; hdr = hdr->next) if (hdr->colno == colno) { *width = hdr->width; *alignment = hdr->alignment; *col_name = hdr->col_name; return 1; } return 0; } /* Initalize private members at startup. */ struct ui_out * ui_out_new (struct ui_out_impl *impl, void *data, int flags) { struct ui_out *uiout = XMALLOC (struct ui_out); uiout->data = data; uiout->impl = impl; uiout->flags = flags; uiout->table.flag = 0; uiout->table.body_flag = 0; uiout->level = 0; memset (uiout->levels, 0, sizeof (uiout->levels)); uiout->table.header_first = NULL; uiout->table.header_last = NULL; uiout->table.header_next = NULL; return uiout; } /* Standard gdb initialization hook. */ void _initialize_ui_out (void) { /* nothing needs to be done */ }