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Add hdoc, a simple tool for generating documentation from a C header.

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This is a very early prototype. It works, but it is probably not efficient
or reliable. However, the documentation format it parses is stable, so I
will begin moving the documentation into the headers.
This commit is contained in:
Jordan Bancino 2023-04-27 01:34:49 +00:00
parent fdcf7ec065
commit 2447bb63cc
4 changed files with 982 additions and 1 deletions
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4
TODO.txt
View file

@ -37,10 +37,12 @@ Milestone: v0.3.0
[ ] HashMap
[ ] HttpRouter
[ ] Str
[ ] HeaderParser
[ ] hdoc
[x] telodendria-admin
[x] telodendria-setup
[x] telodendria-config
[ ] Refactor dev pages so function description and
[~] Refactor dev pages so function description and
return value are in the same location.
[x] Debug memory leaks with caching

552
src/HeaderParser.c Normal file
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@ -0,0 +1,552 @@
#include <HeaderParser.h>
#include <Memory.h>
#include <string.h>
#include <ctype.h>
static int
HeaderConsumeWhitespace(HeaderExpr * expr)
{
int c;
while (1)
{
c = StreamGetc(expr->state.stream);
if (StreamEof(expr->state.stream) || StreamError(expr->state.stream))
{
expr->type = HP_EOF;
expr->data.error.msg = "End of stream reached.";
expr->data.error.lineNo = expr->state.lineNo;
break;
}
if (isspace(c))
{
if (c == '\n')
{
expr->state.lineNo++;
}
}
else
{
break;
}
}
return c;
}
static char *
HeaderConsumeWord(HeaderExpr * expr)
{
char *str = Malloc(16 * sizeof(char));
int len = 16;
int i;
int c;
if (!str)
{
return NULL;
}
c = HeaderConsumeWhitespace(expr);
i = 0;
str[i] = c;
i++;
while (!isspace(c = StreamGetc(expr->state.stream)))
{
if (i >= len)
{
len *= 2;
str = Realloc(str, len * sizeof(char));
}
str[i] = c;
i++;
}
if (i >= len)
{
len++;
str = Realloc(str, len * sizeof(char));
}
str[i] = '\0';
if (c != EOF)
{
StreamUngetc(expr->state.stream, c);
}
return str;
}
static char *
HeaderConsumeAlnum(HeaderExpr * expr)
{
char *str = Malloc(16 * sizeof(char));
int len = 16;
int i;
int c;
if (!str)
{
return NULL;
}
c = HeaderConsumeWhitespace(expr);
i = 0;
str[i] = c;
i++;
while (isalnum(c = StreamGetc(expr->state.stream)))
{
if (i >= len)
{
len *= 2;
str = Realloc(str, len * sizeof(char));
}
str[i] = c;
i++;
}
if (i >= len)
{
len++;
str = Realloc(str, len * sizeof(char));
}
str[i] = '\0';
if (c != EOF)
{
StreamUngetc(expr->state.stream, c);
}
return str;
}
static char *
HeaderConsumeArg(HeaderExpr * expr)
{
char *str = Malloc(16 * sizeof(char));
int len = 16;
int i;
int c;
int block = 0;
if (!str)
{
return NULL;
}
c = HeaderConsumeWhitespace(expr);
i = 0;
str[i] = c;
i++;
while (((c = StreamGetc(expr->state.stream)) != ',' && c != ')') || block > 0)
{
if (i >= len)
{
len *= 2;
str = Realloc(str, len * sizeof(char));
}
str[i] = c;
i++;
if (c == '(')
{
block++;
}
else if (c == ')')
{
block--;
}
}
if (i >= len)
{
len++;
str = Realloc(str, len * sizeof(char));
}
str[i] = '\0';
if (c != EOF)
{
StreamUngetc(expr->state.stream, c);
}
return str;
}
void
HeaderParse(Stream * stream, HeaderExpr * expr)
{
int c;
if (!expr)
{
return;
}
if (!stream)
{
expr->type = HP_PARSE_ERROR;
expr->data.error.msg = "NULL pointer to stream.";
expr->data.error.lineNo = -1;
return;
}
if (expr->type == HP_DECLARATION && expr->data.declaration.args)
{
size_t i;
for (i = 0; i < ArraySize(expr->data.declaration.args); i++)
{
Free(ArrayGet(expr->data.declaration.args, i));
}
ArrayFree(expr->data.declaration.args);
}
expr->state.stream = stream;
if (!expr->state.lineNo)
{
expr->state.lineNo = 1;
}
c = HeaderConsumeWhitespace(expr);
if (StreamEof(stream) || StreamError(stream))
{
expr->type = HP_EOF;
expr->data.error.msg = "End of stream reached.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
if (c == '/')
{
int i = 0;
c = StreamGetc(expr->state.stream);
if (c != '*')
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Expected comment opening.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
expr->type = HP_COMMENT;
while (1)
{
if (i >= HEADER_EXPR_MAX - 1)
{
expr->type = HP_PARSE_ERROR;
expr->data.error.msg = "Memory limit exceeded while parsing comment.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
c = StreamGetc(expr->state.stream);
if (StreamEof(expr->state.stream) || StreamError(expr->state.stream))
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Unterminated comment.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
if (c == '*')
{
c = StreamGetc(expr->state.stream);
if (c == '/')
{
expr->data.text[i] = '\0';
break;
}
else
{
expr->data.text[i] = '*';
i++;
expr->data.text[i] = c;
i++;
}
}
else
{
expr->data.text[i] = c;
i++;
if (c == '\n')
{
expr->state.lineNo++;
}
}
}
}
else if (c == '#')
{
int i = 0;
char *word;
expr->type = HP_PREPROCESSOR_DIRECTIVE;
expr->data.text[i] = '#';
i++;
word = HeaderConsumeWord(expr);
strncpy(expr->data.text + i, word, HEADER_EXPR_MAX - i - 1);
i += strlen(word);
if (strcmp(word, "include") == 0 ||
strcmp(word, "undef") == 0 ||
strcmp(word, "ifdef") == 0 ||
strcmp(word, "ifndef") == 0)
{
/* Read one more word */
Free(word);
word = HeaderConsumeWord(expr);
if (i + strlen(word) + 1 >= HEADER_EXPR_MAX)
{
expr->type = HP_PARSE_ERROR;
expr->data.error.msg = "Memory limit reached parsing preprocessor directive.";
expr->data.error.lineNo = expr->state.lineNo;
}
else
{
strncpy(expr->data.text + i + 1, word, HEADER_EXPR_MAX - i - 1);
expr->data.text[i] = ' ';
}
Free(word);
}
else if (strcmp(word, "define") == 0 ||
strcmp(word, "if") == 0 ||
strcmp(word, "elif") == 0 ||
strcmp(word, "error") == 0)
{
Free(word);
expr->data.text[i] = ' ';
i++;
while (1)
{
if (i >= HEADER_EXPR_MAX - 1)
{
expr->type = HP_PARSE_ERROR;
expr->data.error.msg = "Memory limit reached parsing preprocessor directive.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
c = StreamGetc(expr->state.stream);
if (StreamEof(expr->state.stream) || StreamError(expr->state.stream))
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Unterminated preprocessor directive.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
/* TODO: Handle backslash escapes */
if (c == '\n')
{
expr->data.text[i] = '\0';
break;
}
else
{
expr->data.text[i] = c;
i++;
}
}
}
else if (strcmp(word, "else") == 0 ||
strcmp(word, "endif") == 0)
{
/* Read no more words, that's the whole directive */
}
else
{
Free(word);
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Unknown preprocessor directive.";
expr->data.error.lineNo = expr->state.lineNo;
}
}
else
{
char *word;
StreamUngetc(expr->state.stream, c);
word = HeaderConsumeWord(expr);
if (strcmp(word, "typedef") == 0)
{
int block = 0;
int i = 0;
expr->type = HP_TYPEDEF;
strncpy(expr->data.text, word, HEADER_EXPR_MAX - 1);
i += strlen(word);
expr->data.text[i] = ' ';
i++;
while (1)
{
if (i >= HEADER_EXPR_MAX - 1)
{
expr->type = HP_PARSE_ERROR;
expr->data.error.msg = "Memory limit exceeded while parsing typedef.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
c = StreamGetc(expr->state.stream);
if (StreamEof(expr->state.stream) || StreamError(expr->state.stream))
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Unterminated typedef.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
expr->data.text[i] = c;
i++;
if (c == '{')
{
block++;
}
else if (c == '}')
{
block--;
}
if (block <= 0 && c == ';')
{
expr->data.text[i] = '\0';
break;
}
}
}
else if (strcmp(word, "extern") == 0)
{
int wordLimit = sizeof(expr->data.declaration.returnType) - 8;
int wordLen;
Free(word);
word = HeaderConsumeWord(expr);
wordLen = strlen(word);
if (wordLen > wordLimit)
{
expr->type = HP_PARSE_ERROR;
expr->data.error.msg = "Return of declaration exceeds length limit.";
expr->data.error.lineNo = expr->state.lineNo;
}
else
{
int i = wordLen;
expr->type = HP_DECLARATION;
strncpy(expr->data.declaration.returnType, word, wordLimit);
Free(word);
c = HeaderConsumeWhitespace(expr);
if (c == '*')
{
expr->data.declaration.returnType[i] = ' ';
i++;
expr->data.declaration.returnType[i] = '*';
i++;
while ((c = HeaderConsumeWhitespace(expr)) == '*')
{
expr->data.declaration.returnType[i] = c;
i++;
}
}
StreamUngetc(expr->state.stream, c);
word = HeaderConsumeAlnum(expr);
wordLen = strlen(word);
wordLimit = sizeof(expr->data.declaration.name) - 1;
if (wordLen > wordLimit)
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Function name too long.";
expr->data.error.lineNo = expr->state.lineNo;
}
else
{
strncpy(expr->data.declaration.name, word, wordLimit);
Free(word);
word = NULL;
c = HeaderConsumeWhitespace(expr);
if (c != '(')
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Expected '('";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
expr->data.declaration.args = ArrayCreate();
do {
word = HeaderConsumeArg(expr);
ArrayAdd(expr->data.declaration.args, word);
word = NULL;
}
while ((!StreamEof(expr->state.stream)) && ((c = HeaderConsumeWhitespace(expr)) != ')'));
if (StreamEof(expr->state.stream))
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "End of file reached before ')'.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
c = HeaderConsumeWhitespace(expr);
if (c != ';')
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Expected ';'.";
expr->data.error.lineNo = expr->state.lineNo;
return;
}
}
}
}
else
{
expr->type = HP_SYNTAX_ERROR;
expr->data.error.msg = "Expected comment, typedef, or extern.";
expr->data.error.lineNo = expr->state.lineNo;
}
Free(word);
}
}

75
src/include/HeaderParser.h Normal file
View file

@ -0,0 +1,75 @@
/**
* Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#ifndef TELODENDRIA_HEADERPARSER_H
#define TELODENDRIA_HEADERPARSER_H
#include <Stream.h>
#include <Array.h>
/* Here's a comment */
#define HEADER_EXPR_MAX 4096
typedef enum HeaderExprType
{
HP_COMMENT,
HP_PREPROCESSOR_DIRECTIVE,
HP_TYPEDEF,
HP_DECLARATION,
HP_SYNTAX_ERROR,
HP_PARSE_ERROR,
HP_EOF
} HeaderExprType;
typedef struct HeaderDeclaration
{
char returnType[64];
char name[32]; /* Enforced by ANSI C */
Array *args;
} HeaderDeclaration;
typedef struct HeaderExpr
{
HeaderExprType type;
union
{
char text[HEADER_EXPR_MAX];
HeaderDeclaration declaration;
struct
{
int lineNo;
char *msg;
} error;
} data;
struct
{
Stream *stream;
int lineNo;
} state;
} HeaderExpr;
extern void
HeaderParse(Stream *, HeaderExpr *);
#endif /* TELODENDRIA_HEADERPARSER_H */

352
tools/src/hdoc.c Normal file
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@ -0,0 +1,352 @@
/*
* Copyright (C) 2022-2023 Jordan Bancino <@jordan:bancino.net>
*
* Permission is hereby granted, free of charge, to any person
* obtaining a copy of this software and associated documentation files
* (the "Software"), to deal in the Software without restriction,
* including without limitation the rights to use, copy, modify, merge,
* publish, distribute, sublicense, and/or sell copies of the Software,
* and to permit persons to whom the Software is furnished to do so,
* subject to the following conditions:
*
* The above copyright notice and this permission notice shall be
* included in all copies or portions of the Software.
*
* THE SOFTWARE IS PROVIDED "AS IS", WITHOUT WARRANTY OF ANY KIND,
* EXPRESS OR IMPLIED, INCLUDING BUT NOT LIMITED TO THE WARRANTIES OF
* MERCHANTABILITY, FITNESS FOR A PARTICULAR PURPOSE AND
* NONINFRINGEMENT. IN NO EVENT SHALL THE AUTHORS OR COPYRIGHT HOLDERS
* BE LIABLE FOR ANY CLAIM, DAMAGES OR OTHER LIABILITY, WHETHER IN AN
* ACTION OF CONTRACT, TORT OR OTHERWISE, ARISING FROM, OUT OF OR IN
* CONNECTION WITH THE SOFTWARE OR THE USE OR OTHER DEALINGS IN THE
* SOFTWARE.
*/
#include <HeaderParser.h>
#include <HashMap.h>
#include <Str.h>
#include <Memory.h>
#include <string.h>
#include <ctype.h>
#include <stdlib.h>
#include <time.h>
typedef struct DocDecl
{
char docs[HEADER_EXPR_MAX];
HeaderDeclaration decl;
} DocDecl;
typedef struct DocTypedef
{
char docs[HEADER_EXPR_MAX];
char text[HEADER_EXPR_MAX];
} DocTypedef;
static void
ParseMainBlock(HashMap * registers, Array * descr, char *comment)
{
char *line = strtok(comment, "\n");
while (line)
{
while (*line && (isspace(*line) || *line == '*'))
{
line++;
}
if (!*line)
{
goto next;
}
if (*line == '@')
{
int i = 0;
line++;
while (!isspace(line[i]))
{
i++;
}
line[i] = '\0';
Free(HashMapSet(registers, line, StrDuplicate(line + i + 1)));
}
else
{
ArrayAdd(descr, StrDuplicate(line));
}
next:
line = strtok(NULL, "\n");
}
}
int
main(int argc, char **argv)
{
HeaderExpr expr;
size_t i;
char *val;
int exit = EXIT_SUCCESS;
HashMap *registers = HashMapCreate();
Array *descr = ArrayCreate();
Array *declarations = ArrayCreate();
DocDecl *decl = NULL;
Array *typedefs = ArrayCreate();
DocTypedef *type = NULL;
char comment[HEADER_EXPR_MAX];
int isDocumented = 0;
memset(&expr, 0, sizeof(expr));
while (1)
{
HeaderParse(StreamStdin(), &expr);
switch (expr.type)
{
case HP_PREPROCESSOR_DIRECTIVE:
/* Ignore */
break;
case HP_EOF:
/* Done parsing */
goto last;
case HP_PARSE_ERROR:
case HP_SYNTAX_ERROR:
StreamPrintf(StreamStderr(), "Parse Error: (line %d) %s\n",
expr.data.error.lineNo, expr.data.error.msg);
exit = EXIT_FAILURE;
goto finish;
case HP_COMMENT:
if (expr.data.text[0] != '*')
{
break;
}
if (strncmp(expr.data.text, "**", 2) == 0)
{
ParseMainBlock(registers, descr, expr.data.text);
}
else
{
strncpy(comment, expr.data.text, sizeof(comment));
isDocumented = 1;
}
break;
case HP_TYPEDEF:
if (!isDocumented)
{
StreamPrintf(StreamStderr(),
"Error: Undocumented typedef:\n%s\n",
expr.data.text);
exit = EXIT_FAILURE;
goto finish;
}
else
{
type = Malloc(sizeof(DocTypedef));
strncpy(type->docs, comment, sizeof(type->docs));
strncpy(type->text, expr.data.text, sizeof(type->text));
ArrayAdd(typedefs, type);
isDocumented = 0;
}
break;
case HP_DECLARATION:
if (!isDocumented)
{
StreamPrintf(StreamStderr(),
"Error: %s() is undocumented.\n",
expr.data.declaration.name);
exit = EXIT_FAILURE;
goto finish;
}
else
{
decl = Malloc(sizeof(DocDecl));
decl->decl = expr.data.declaration;
decl->decl.args = ArrayCreate();
strncpy(decl->docs, comment, sizeof(decl->docs));
for (i = 0; i < ArraySize(expr.data.declaration.args); i++)
{
ArrayAdd(decl->decl.args, StrDuplicate(ArrayGet(expr.data.declaration.args, i)));
}
ArrayAdd(declarations, decl);
isDocumented = 0;
}
break;
default:
StreamPrintf(StreamStderr(), "Unknown header type: %d\n", expr.type);
StreamPrintf(StreamStderr(), "This is a programming error.\n");
exit = EXIT_FAILURE;
goto finish;
}
}
last:
val = HashMapGet(registers, "Nm");
if (!val)
{
HashMapSet(registers, "Nm", StrDuplicate("Unnamed"));
}
val = HashMapGet(registers, "Dd");
if (!val)
{
time_t currentTime;
struct tm *timeInfo;
char tsBuf[1024];
currentTime = time(NULL);
timeInfo = localtime(&currentTime);
strftime(tsBuf, sizeof(tsBuf), "%B %d %Y", timeInfo);
val = tsBuf;
}
StreamPrintf(StreamStdout(), ".Dd $%s: %s $\n", "Mdocdate", val);
val = HashMapGet(registers, "Os");
if (val)
{
StreamPrintf(StreamStdout(), ".Os %s\n", val);
}
val = HashMapGet(registers, "Nm");
StreamPrintf(StreamStdout(), ".Dt %s 3\n", val);
StreamPrintf(StreamStdout(), ".Sh NAME\n");
StreamPrintf(StreamStdout(), ".Nm %s\n", val);
val = HashMapGet(registers, "Nd");
if (!val)
{
val = "No Description.";
}
StreamPrintf(StreamStdout(), ".Nd %s\n", val);
StreamPrintf(StreamStdout(), ".Sh SYNOPSIS\n");
val = HashMapGet(registers, "Nm");
StreamPrintf(StreamStdout(), ".In %s.h\n", val);
for (i = 0; i < ArraySize(declarations); i++)
{
size_t j;
decl = ArrayGet(declarations, i);
StreamPrintf(StreamStdout(), ".Ft %s\n", decl->decl.returnType);
StreamPrintf(StreamStdout(), ".Fn %s ", decl->decl.name);
for (j = 0; j < ArraySize(decl->decl.args); j++)
{
StreamPrintf(StreamStdout(), "\"%s\" ", ArrayGet(decl->decl.args, j));
}
StreamPutc(StreamStdout(), '\n');
}
if (ArraySize(typedefs))
{
StreamPrintf(StreamStdout(), ".Sh TYPE DECLARATIONS\n");
for (i = 0; i < ArraySize(typedefs); i++)
{
char *line;
type = ArrayGet(typedefs, i);
StreamPrintf(StreamStdout(), ".Bd -literal -offset indent\n");
StreamPrintf(StreamStdout(), "%s\n", type->text);
StreamPrintf(StreamStdout(), ".Ed\n.Pp\n");
line = strtok(type->docs, "\n");
while (line)
{
while (*line && (isspace(*line) || *line == '*'))
{
line++;
}
if (*line)
{
StreamPrintf(StreamStdout(), "%s\n", line);
}
line = strtok(NULL, "\n");
}
}
}
StreamPrintf(StreamStdout(), ".Sh DESCRIPTION\n");
for (i = 0; i < ArraySize(descr); i++)
{
StreamPrintf(StreamStdout(), "%s\n", ArrayGet(descr, i));
}
for (i = 0; i < ArraySize(declarations); i++)
{
size_t j;
char *line;
decl = ArrayGet(declarations, i);
StreamPrintf(StreamStdout(), ".Ss %s %s(",
decl->decl.returnType, decl->decl.name);
for (j = 0; j < ArraySize(decl->decl.args); j++)
{
StreamPrintf(StreamStdout(), "%s", ArrayGet(decl->decl.args, j));
if (j < ArraySize(decl->decl.args) - 1)
{
StreamPuts(StreamStdout(), ", ");
}
StreamPuts(StreamStdout(), ")\n");
}
line = strtok(decl->docs, "\n");
while (line)
{
while (*line && (isspace(*line) || *line == '*'))
{
line++;
}
if (*line)
{
StreamPrintf(StreamStdout(), "%s\n", line);
}
line = strtok(NULL, "\n");
}
}
val = HashMapGet(registers, "Xr");
if (val)
{
char *xr = strtok(val, " ");
StreamPrintf(StreamStdout(), ".Sh SEE ALSO\n");
while (xr)
{
if (*xr)
{
StreamPrintf(StreamStdout(), ".Xr %s 3 ", xr);
}
xr = strtok(NULL, " ");
if (xr)
{
StreamPutc(StreamStdout(), ',');
}
StreamPutc(StreamStdout(), '\n');
}
}
finish:
StreamClose(StreamStdin());
StreamClose(StreamStdout());
StreamClose(StreamStderr());
MemoryFreeAll();
return exit;
}