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manpage.c
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manpage.c
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/* $Id: manpage.c,v 1.1 2024-06-03 09:56:30 behdad Exp $
* stuff to do with manual page outputing
*/
/*-------------------------------------------------------------------------
* This file has been modified by Manoj Srivastava <[email protected]>
* to incorporate a patch that was also submitted to the author. The change
* shall be incorporated upstream in due course.
------------------------------------------------------------------------*/
#include "c2man.h"
#include <errno.h>
#include <ctype.h>
#include "manpage.h"
#include "strconcat.h"
#include "strappend.h"
#include "semantic.h"
#include "output.h"
#ifdef I_SYS_FILE
#include <sys/file.h>
#endif /* I_SYS_FILE */
/*----------------------*/
/* list of manual pages */
/*----------------------*/
ManualPage *firstpage = NULL;
ManualPage **lastpagenext = &firstpage;
/*----------------*/
/* dummy function */
/*----------------*/
void dummy(void)
{
}
/*------------------------*/
/* Create new manual page */
/*------------------------*/
void new_manual_page(char *comment, DeclSpec *decl_spec, Declarator *declarator)
{
ManualPage *newpage;
/*-----------------------------------------------*/
/* check that we really want a man page for this */
/*-----------------------------------------------*/
if ((!comment) ||
!inbasefile ||
(!variables_out && !is_function_declarator(declarator)) ||
(decl_spec->flags & DS_JUNK) ||
(!static_out && (decl_spec->flags & DS_STATIC) && !header_file) ||
/*--------------------------------------------------------------------*/
/* only document extern stuff if it's in a header file, or includes a */
/* function definition */
/*--------------------------------------------------------------------*/
((decl_spec->flags & DS_EXTERN) && !header_file && declarator->type != DECL_FUNCDEF))
{
free_decl_spec(decl_spec);
free_declarator(declarator);
safe_free(comment);
return;
}
declarator->comment = comment;
newpage = (ManualPage *)safe_malloc(sizeof *newpage);
newpage->decl_spec = (DeclSpec *)safe_malloc(sizeof *newpage->decl_spec);
newpage->declarator = declarator;
*newpage->decl_spec = *decl_spec;
newpage->sourcefile = strduplicate(basefile);
newpage->sourcetime = basetime;
*lastpagenext = newpage;
newpage->next = NULL;
lastpagenext = &newpage->next;
}
/*------------------*/
/* free manual page */
/*------------------*/
void free_manual_page(ManualPage *page)
{
free_decl_spec(page->decl_spec);
free(page->decl_spec);
free_declarator(page->declarator);
safe_free(page->sourcefile);
}
/*-------------------------------*/
/* free the list of manual pages */
/*-------------------------------*/
void free_manual_pages(ManualPage *first)
{
ManualPage *page, *next;
/*-----------------------------------------------*/
/* free any terse description read from the file */
/*-----------------------------------------------*/
if (group_terse && !terse_specified)
{
free(group_terse);
group_terse = NULL;
}
for (page = first;page;page = next)
{
next = page->next;
free_manual_page(page);
free(page);
}
}
/*----------------------------------------------------------------------------*/
/* allocate a substring starting at start, ending at end (NOT including *end) */
/*----------------------------------------------------------------------------*/
char *alloc_string(const char *start, const char *end)
{
int len = end - start;
char *ret;
if (len == 0)
return NULL;
ret = (char *)safe_malloc((size_t)len+1);
(void)strncpy(ret,start,len);
ret[len] = '\0';
return ret;
}
/*-----------------------------------------------------------------*/
/* remember the terse description from the first comment in a file */
/*-----------------------------------------------------------------*/
void remember_terse(char *comment)
{
char *c,
*d;
enum { STUFF, LEADSPACE, DASH, TRAILSPACE, FOUND } state = STUFF;
/*---------------------------------------------------------------*/
/* if we've found a terse comment in a previous file, or one was */
/* specified on the command line, forget it */
/*---------------------------------------------------------------*/
if (group_terse)
return;
/*-------------------------------------------------------------*/
/* look for a whitespace surrounded sequence of dashes to skip */
/*-------------------------------------------------------------*/
for (c = comment;*c && state != FOUND; c++)
{
switch (state)
{
case STUFF: if (isspace(*c))
state = LEADSPACE;
break;
case LEADSPACE: if (*c == '-')
state = DASH;
else if (!isspace(*c))
state = STUFF;
break;
case DASH: if (isspace(*c))
state = TRAILSPACE;
else if (*c != '-')
state = STUFF;
break;
case TRAILSPACE: if (!isspace(*c))
{ c--;
state = FOUND;
}
break;
case FOUND: break;
}
}
/*-----------------------------------------------*/
/* if no dashes were found, go back to the start */
/*-----------------------------------------------*/
if (state != FOUND)
c = comment;
d = c + 1;
while (*d && *d != '\n')
d++;
group_terse = alloc_string(c,d);
}
/*----------------------------------------------------------*/
/* output a comment in man page form, followed by a newline */
/*----------------------------------------------------------*/
void output_comment(const char *comment)
{
if (!comment || !comment[0])
output->text("Not Documented.");
else if (fixup_comments)
output->description(comment);
else
output->text(comment);
output->character('\n');
}
/*--------------------------------------*/
/* output the phrase "a[n] <type name>" */
/*--------------------------------------*/
void output_conjunction(char *text)
{
output->character('a');
if (strchr("aAeEiIoOuU",text[0]))
output->character('n');
output->character(' ');
output->code(text);
}
/*-----------------------------------------------------------------------*/
/* output the description for an identifier; be it return value or param */
/*-----------------------------------------------------------------------*/
/*-----------------------------*/
static void output_identifier_description(const char *comment, /* comment for this identifier */
void (*outfunc) _((const char *)), /* function to output comment */
const DeclSpec *decl_spec, /* Declarator specification */
const Declarator *declarator) /* Declarator */
/*-----------------------------*/
{
/*-----------------------------------------------------------*/
/* one day, this may document the contents of structures too */
/*-----------------------------------------------------------*/
/*---------------------------------------------*/
/* output list of possible enum values, if any */
/*---------------------------------------------*/
if (decl_spec->enum_list)
{
int maxtaglen = 0;
char *longestag = NULL;
int descriptions = 0;
int entries = 0;
Enumerator *e;
int is_first = 1;
boolean started = FALSE;
/*-----------------------------------------------*/
/* don't output the "Not Doc." message for enums */
/*-----------------------------------------------*/
if (comment)
{
(*outfunc)(comment);
output->blank_line();
}
/*------------------------------*/
/* see if any have descriptions */
/*------------------------------*/
for (e = decl_spec->enum_list->first; e; e = e->next)
{ if (e->name[0] != '_')
{
int taglen = strlen(e->name);
if (taglen > maxtaglen)
{
maxtaglen = taglen;
longestag = e->name;
}
if (e->comment) descriptions = 1;
entries++;
}
}
/*---------------------------------------------------------------------*/
/* if there are a lot of them, the list may be automatically generated */
/* and probably isn't wanted in every manual page */
/*---------------------------------------------------------------------*/
if (entries > 20)
{
char entries_s[15];
(void)sprintf(entries_s, "%d", entries);
output->text("Since there are ");
output->text(entries_s);
output->text(" possible values for ");
output_conjunction(decl_spec->text);
output->text(", they are not all listed here.\n");
}
/*----------------------------*/
else if (entries > 0) /* skip the pathological case */
/*----------------------------*/
{
/*----------------------------------------------------------*/
/* the number of possibilities is reasonable; list them all */
/*----------------------------------------------------------*/
output->text("Possible values for ");
output_conjunction(decl_spec->text);
output->text(" are as follows:\n");
for (e = decl_spec->enum_list->first; e; e = e->next)
{
/*----------------------------------------------*/
/* don't print names with a leading underscore! */
/*----------------------------------------------*/
if (e->name[0] == '_')
continue;
if (e->group_comment)
{
/*-----------------------------------------------*/
/* break out of table mode for the group comment */
/*-----------------------------------------------*/
if (started)
{
if (descriptions)
output->table_end();
else
output->list_end();
started = FALSE;
}
output->indent();
output_comment(e->group_comment);
}
if (!started)
{
if (descriptions)
output->table_start(longestag);
else
output->list_start();
started = TRUE;
}
if (descriptions)
output->table_entry(e->name, e->comment);
else
{
if (!is_first)
output->list_separator();
is_first = 0;
output->list_entry(e->name);
}
}
if (started)
{
if (descriptions)
output->table_end();
else
output->list_end();
}
}
}
else
(*outfunc)(comment);
}
/*-----------------------------------------*/
/* is there automatic documentation here ? */
/*-----------------------------------------*/
static boolean auto_documented(const ManualPage *page)
{
/*-----------------------------------*/
/* one day we may handle structs too */
/*-----------------------------------*/
/*----------------------------*/
return page->decl_spec->enum_list != NULL; /* enums are self-documenting */
/*----------------------------*/
}
/*-------------------------------------------------------*/
/* decide if a manual page needs a RETURNS section. If */
/* this is true, then output_identifier_description must */
/* be able to generate * sensible output for it */
/*-------------------------------------------------------*/
static boolean needs_returns_section(const ManualPage *page)
{
return (page->returns && page->returns[0]) ||
(auto_documented(page) && is_function_declarator(page->declarator));
}
/*--------------------------------------------------*/
/* does this declarator have documented parameters? */
/*--------------------------------------------------*/
boolean has_documented_parameters(const Declarator *d)
{
if (has_parameters(d))
{
Parameter *p;
for (p = d->head->params.first; p != NULL; p = p->next)
{ if (p->declarator->comment || always_document_params)
return TRUE;
}
}
return FALSE;
}
/*----------------------------------------------------*/
/* Output the list of function parameter descriptions */
/*----------------------------------------------------*/
void output_parameter_descriptions (ParameterList *params, char *function)
{
Parameter *p;
boolean tag_list_started = FALSE;
for (p = params->first; p != NULL; p = p->next)
{
if (p->suppress || (!always_document_params && p->declarator->comment == NULL))
continue;
if (!tag_list_started)
{
output->tag_list_start();
tag_list_started = TRUE;
}
if (p->duplicate)
output->tag_entry_start_extra();
else
output->tag_entry_start();
output_parameter(p);
/*-------------------------------------------*/
/* include function name if it's a duplicate */
/*-------------------------------------------*/
if (p->duplicate)
output->tag_entry_end_extra(function);
else
output->tag_entry_end();
output_identifier_description(p->declarator->comment, output_comment, &p->decl_spec, p->declarator);
}
if (tag_list_started)
output->tag_list_end();
}
/*--------------------------------------------------------*/
/* split out the 'Returns:' section of a function comment */
/*--------------------------------------------------------*/
boolean split_returns_comment(char *comment, char **description, char **returns)
{
char *retstart;
for (retstart = comment;
retstart;
retstart = strchr(retstart,'\n'))
{
if (*retstart == '\n')
/*---------------------*/
retstart++; /* skip the newline */
/*---------------------*/
if (!strncmpi(retstart, "returns",(size_t)7))
{
/*---------------------*/
char *descend = retstart - 2; /* back before newline */
/*---------------------*/
/*----------------------------------------------------------*/
/* go back to the end of the description in case there were */
/* linefeeds before the returns */
/*----------------------------------------------------------*/
while (descend > comment && isspace(*descend))
descend--;
*description =
descend > comment ? alloc_string(comment,descend+1) : NULL;
retstart += 7;
while (*retstart == ':' || isspace(*retstart))
retstart++;
if (*retstart)
*returns = strduplicate(retstart);
else
*returns = NULL;
return TRUE;
}
}
*description = comment;
*returns = NULL;
return FALSE;
}
/*-----------------------------------------------------------------------*/
/* skip to past the dash on the first line, if there is one */
/* The dash must be surrounded by whitespace, so hyphens are not skipped */
/*-----------------------------------------------------------------------*/
const char *skipdash(const char *c)
{
const char *d;
/*----------------------------------------------------------*/
/* ignore anything on the first line, up to a dash (if any) */
/*----------------------------------------------------------*/
for (d = c + 1; *d && *d != '\n' && *d != '-'; d++)
;
if (isspace(d[-1]) && d[0] == '-' && isspace(d[1]))
{
do
d++;
while (*d && *d != '\n' && isspace(*d));
if (*d && *d != '\n') c = d;
}
return c;
}
/*----------------------------------------------------*/
/* split the function comment into manual page format */
/* returns TRUE if the DESCRIPTION field was explicit */
/*----------------------------------------------------*/
boolean split_function_comment(const char *comment,
const char *identifier_name,
char **terse,
char **description,
char **returns,
Section **extra_sections)
{
const char *c,
*start_text = NULL,
*end_text = NULL;
char **put_ptr = NULL;
Section *first_section,
**lastnextsection = &first_section;
boolean explicit_description = FALSE;
boolean lastblank = TRUE;
boolean skip_dash = FALSE;
*description = *returns = NULL;
if (terse)
*terse = NULL;
/*------------------*/
/* for each line... */
/*------------------*/
for (c = comment; *c;)
{
const char *start_line = c;
boolean section_heading;
/*-------------------------------*/
/* remember if it's a blank line */
/*-------------------------------*/
if (*c == '\n')
{
lastblank = TRUE;
c++;
continue;
}
/*------------------------------------------------------------------*/
/* if the last one was blank, perhaps this one is a section heading */
/*------------------------------------------------------------------*/
if (lastblank)
{
boolean need_colon = FALSE;
/*-------------------------------------------*/
/* see if we've found the start of a SECTION */
/*-------------------------------------------*/
while (isalnum(*c) || *c == ' ' || *c == '/')
{
if (isspace(*c)) need_colon = TRUE;
c++;
}
section_heading = (!need_colon && *c == '\n') ||
(*c == ':' && (!need_colon || *(c+1) == '\n')) ||
(!need_colon && *c == '\0' && start_line == comment);
}
else
section_heading = FALSE;
/*-------------------------------------*/
lastblank = FALSE; /* this one's not blank; for next time */
/*-------------------------------------*/
if (section_heading)
{
size_t section_len = c - start_line; /* length of section name */
/*-------------------------------------------------------------*/
/* yes, we've found a SECTION; store the previous one (if any) */
/*-------------------------------------------------------------*/
if (put_ptr && start_text)
{
if (skip_dash)
start_text = skipdash(start_text);
*put_ptr = alloc_string(start_text,end_text);
}
skip_dash = FALSE;
/*---------------------------------------------------------------*/
/* check for comments that start with the name of the identifier */
/*---------------------------------------------------------------*/
if (start_line == comment &&
!strncmp(start_line, identifier_name, section_len))
put_ptr = description;
/*---------------------------------*/
/* only accept NAME if not grouped */
/*---------------------------------*/
else if (terse &&
(!strncmpi(start_line,"NAME", section_len) ||
!strncmpi(start_line,"FUNCTION", section_len) ||
!strncmpi(start_line,"PROCEDURE", section_len) ||
!strncmpi(start_line,"ROUTINE", section_len)) )
{
put_ptr = terse;
skip_dash = TRUE;
}
else if (!strncmpi(start_line,"DESCRIPTION", section_len))
{
explicit_description = TRUE;
put_ptr = description;
}
else if (!strncmpi(start_line,"RETURNS", section_len))
{
put_ptr = returns;
}
else
{
/*------------------------*/
/* allocate a new section */
/*------------------------*/
Section *new_section = (Section *)safe_malloc(sizeof *new_section);
*lastnextsection = new_section;
lastnextsection = &new_section->next;
new_section->name = alloc_string(start_line,c);
strtoupper(new_section->name);
new_section->text = NULL;
/*---------------------*/
new_section->been_output = FALSE; /* not been output yet */
/*---------------------*/
put_ptr = &new_section->text;
}
/*----------------------------------------------------------*/
/* defer decision about where text starts till we find some */
/*----------------------------------------------------------*/
start_text = NULL;
/*------------------------*/
if (*c == ':') /* skip the terminating : */
/*------------------------*/
{
c++;
/*---------------------------------------*/
/* skip forward to the start of the text */
/*---------------------------------------*/
while (*c && *c != '\n' && isspace(*c))
c++;
/*---------------------------------------------*/
/* if we find the text here, then we've got it */
/*---------------------------------------------*/
if (*c && *c != '\n')
start_text = c;
}
}
else
{
/*----------------------------------------------------*/
/* are we looking at the top of the function comment? */
/*----------------------------------------------------*/
if (start_line == comment)
{
/*-----------------------------------------------------*/
/* only look for terse comment if not grouped together */
/*-----------------------------------------------------*/
if (terse)
{
const char *endterse, *afterdash = skipdash(start_line);
/*-----------------------------------*/
/* find the end of the terse comment */
/*-----------------------------------*/
while (*c && *c != '\n')
{
c++;
/*-----------------------------------------------------*/
/* '.' ends terse description only if it ends sentence */
/*-----------------------------------------------------*/
if (*(c-1)=='.' && *c && isspace(*c))
break;
}
endterse = c;
*terse = alloc_string(afterdash < endterse ? afterdash : start_line,
endterse);
/* skip it if it's a ., and any trailing spaces */
if (*c == '.')
do c++; while (*c && *c != '\n' && isspace(*c));
/*-------------*/
start_text = NULL; /* look for it */
/*-------------*/
if (*c && *c != '\n')
/*---------------------------------------------*/
/* actually, it's a description, starting here */
/*---------------------------------------------*/
start_text = c;
}
/*-------------------------------------------------------------*/
/* must be a description starting at the beginning of the line */
/*-------------------------------------------------------------*/
else
start_text = start_line;
put_ptr = description;
}
else
{
/*--------------------------------------------------------*/
/* have we just located the first real text in a section? */
/*--------------------------------------------------------*/
if (put_ptr && !start_text)
start_text = start_line;
}
}
/*---------------*/
/* skip the line */
/*---------------*/
if (*c && *c != '\n')
{ while (*c && *c != '\n')
c++;
}
/*-----------------------------------------------*/
end_text = c; /* so far, the text ends at the end of this line */
/*-----------------------------------------------*/
if (*c)
c++;
}
/*--------------------*/
/* store the last one */
/*--------------------*/
if (put_ptr && start_text)
{
if (skip_dash)
start_text = skipdash(start_text);
*put_ptr = alloc_string(start_text,end_text);
}
/*----------------------------------*/
/* terminate (or nuke) section list */
/*----------------------------------*/
*lastnextsection = NULL;
*extra_sections = first_section;
return explicit_description;
}
/*------------------------------------------------*/
/* see if two parameters are declared identically */
/*------------------------------------------------*/
boolean params_identical(Parameter *first, Parameter *second)
{
return first->decl_spec.flags == second->decl_spec.flags &&
/*--------------------------------------------------------*/
/* there may be no decl_spec.text if it's an ellipsis arg */
/*--------------------------------------------------------*/
((!first->decl_spec.text && !second->decl_spec.text) ||
(first->decl_spec.text && second->decl_spec.text && !strcmp(first->decl_spec.text, second->decl_spec.text))) &&
((!first->declarator->text && !second->declarator->text) || (first->declarator->text && second->declarator->text &&
!strcmp(first->declarator->text, second->declarator->text)));
}
/*------------------------------------------------------------------------*/
/* search all the parameters in this grouped manual page for redundancies */
/*------------------------------------------------------------------------*/
boolean mark_duplicate_parameters(ManualPage *firstpage)
{
Parameter *param;
boolean any = FALSE;
ManualPage *page;
for (page = firstpage; page; page = page->next)
{
if (has_parameters(page->declarator))
for (param = page->declarator->head->params.first; param; param = param->next)
{
ManualPage *otherpage;
Parameter *otherparam;
if (always_document_params || param->declarator->comment)
any = TRUE;
for (otherpage = page->next; otherpage; otherpage = otherpage->next)
{
if (has_parameters(otherpage->declarator))
{ for (otherparam = otherpage->declarator->head->params.first; otherparam; otherparam = otherparam->next)
{
/*-----------------------------*/
/* do these two look the same? */
/*-----------------------------*/
if (params_identical(param, otherparam))
{
/*--------------------------------------*/
/* order is important for bit positions */
/*--------------------------------------*/
enum { NEITHER, US, THEM, BOTH } has_comm = NEITHER;
/*------------------------------*/
/* work out who has the comment */
/*------------------------------*/
if (param->declarator->comment)
has_comm |= US;
if (otherparam->declarator->comment)
has_comm |= THEM;
switch(has_comm)
{
case NEITHER:
case US:
otherparam->suppress = TRUE;
break;
case THEM:
param->suppress = TRUE;
break;
case BOTH:
if (!strcmp(param->declarator->comment, otherparam->declarator->comment))
otherparam->suppress = TRUE;
else
{
param->duplicate = TRUE;
otherparam->duplicate = TRUE;
}
break;
}
}
}
}
}
}
}
return any;
}
/*-------------------------------------------------------------*/
/* output a formatting string so that it works with filling on */
/*-------------------------------------------------------------*/
void output_format_string(const char *fmt)
{
while (*fmt)
{
output->character(*fmt);