-#LyX 1.5.0svn created this file. For more info see http://www.lyx.org/
-\lyxformat 245
+#LyX 2.1 created this file. For more info see http://www.lyx.org/
+\lyxformat 448
\begin_document
\begin_header
-\textclass literate-article
+\textclass article
+\use_default_options false
+\begin_modules
+noweb
+\end_modules
+\maintain_unincluded_children false
\language english
+\language_package default
\inputencoding default
-\fontscheme default
+\fontencoding global
+\font_roman default
+\font_sans default
+\font_typewriter default
+\font_math auto
+\font_default_family default
+\use_non_tex_fonts false
+\font_sc false
+\font_osf false
+\font_sf_scale 100
+\font_tt_scale 100
\graphics default
+\default_output_format default
+\output_sync 0
+\bibtex_command default
+\index_command default
\paperfontsize default
\spacing single
+\use_hyperref false
\papersize default
\use_geometry false
-\use_amsmath 0
+\use_package amsmath 0
+\use_package amssymb 0
+\use_package esint 0
+\use_package mathdots 1
+\use_package mathtools 0
+\use_package mhchem 1
+\use_package undertilde 0
\cite_engine basic
+\cite_engine_type numerical
+\biblio_style plain
\use_bibtopic false
+\use_indices false
\paperorientation portrait
+\suppress_date false
+\justification true
+\use_refstyle 0
+\index Index
+\shortcut idx
+\color #008000
+\end_index
\secnumdepth 3
\tocdepth 3
\paragraph_separation indent
-\defskip medskip
+\paragraph_indentation default
\quotes_language english
\papercolumns 1
\papersides 1
\paperpagestyle default
\tracking_changes false
-\output_changes true
+\output_changes false
+\html_math_output 0
+\html_css_as_file 0
+\html_be_strict false
\end_header
\begin_body
\begin_layout Title
-
LyX and Literate Programming
-\newline
+\begin_inset Newline newline
+\end_inset
+
An example program
\end_layout
\begin_layout Author
-
Edmar Wienskoski Jr.
-\newline
+\begin_inset Newline newline
+\end_inset
+
edmar-w-jr@technologist.com
\begin_inset Foot
status collapsed
-\begin_layout Standard
-
+\begin_layout Plain Layout
Modified by Bernard Michael Hurley bernardh@westherts.ac.uk ---- Don't blame
Edmar for any errors that have crept in!
\end_layout
\begin_layout Abstract
-
\series bold
Note:
\series default
\end_layout
\begin_layout Date
-
-
\begin_inset ERT
status collapsed
-\begin_layout Standard
+\begin_layout Plain Layout
+
\backslash
today
\end_layout
\begin_layout Standard
-
-
-\begin_inset LatexCommand \tableofcontents{}
+\begin_inset CommandInset toc
+LatexCommand tableofcontents
\end_inset
\end_layout
\begin_layout Section
-
Introduction
\end_layout
\begin_layout Standard
-
After typesetting a document, LyX scans the LaTeX log file looking for errors.
For each error found, the line number is obtained and a error box is displayed
in the LyX screen at that position.
\end_layout
\begin_layout Standard
-
To use this feature to view compilation errors while working with literate
documents, we need a program that filters the compilation errors and puts
them in a format suitable for LyX reading it.
\end_layout
\begin_layout Standard
-
In this document we present a filter that recognizes compilation error messages
from noweb, gnu C, and the IBM C compiler (xlc).
\end_layout
\begin_layout Standard
-
The filter is required to read from standard input, parse for error messages
and copy the error messages to the standard output.
During the output process, the filter must present the error messages in
\end_layout
\begin_layout Section
-
Algorithm
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
int
-\newline
+\end_layout
+
+\begin_layout Chunk
main (int argc, char **argv)
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
if (argc == 2) {
-\newline
+\end_layout
+
+\begin_layout Chunk
switch (argv[1][0]) {
-\newline
+\end_layout
+
+\begin_layout Chunk
case 'n':
-\newline
+\end_layout
+
+\begin_layout Chunk
<<Scan input for noweb error messages>>
-\newline
+\end_layout
+
+\begin_layout Chunk
break;
-\newline
+\end_layout
+
+\begin_layout Chunk
case 'x':
-\newline
+\end_layout
+
+\begin_layout Chunk
<<Scan input for xlc error messages>>
-\newline
+\end_layout
+
+\begin_layout Chunk
break;
-\newline
+\end_layout
+
+\begin_layout Chunk
case 'a':
-\newline
+\end_layout
+
+\begin_layout Chunk
<<AIX system using both noweb and xlc>>
-\newline
+\end_layout
+
+\begin_layout Chunk
break;
-\newline
+\end_layout
+
+\begin_layout Chunk
case 's':
-\newline
+\end_layout
+
+\begin_layout Chunk
case 'b':
-\newline
+\end_layout
+
+\begin_layout Chunk
<<Solaris and Linux systems using both noweb and gcc>>
-\newline
+\end_layout
+
+\begin_layout Chunk
break;
-\newline
+\end_layout
+
+\begin_layout Chunk
case 'g':
-\newline
+\end_layout
+
+\begin_layout Chunk
default:
-\newline
+\end_layout
+
+\begin_layout Chunk
<<Scan input for gcc error messages>>
-\newline
+\end_layout
+
+\begin_layout Chunk
break;
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
} else {
-\newline
+\end_layout
+
+\begin_layout Chunk
<<Scan input for gcc error messages>>
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
-@
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+@
+\end_layout
+\begin_layout Chunk
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
int main (int argc, char **argv);
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Section
-
Data Structures
\end_layout
\begin_layout Standard
-
We resort to some global variables to allow access from several different
routines.
These are the buffer and related pointers used during the parse of the
input.
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Global variables>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
char buffer[200][200];
-\newline
+\begin_inset Newline newline
+\end_inset
+
int last_buf_line;
-\newline
+\begin_inset Newline newline
+\end_inset
+
int last_err_line;
-\newline
+\begin_inset Newline newline
+\end_inset
+
int err_line;
-\newline
+\begin_inset Newline newline
+\end_inset
+
@
\end_layout
\begin_layout Section
-
The output format
\end_layout
\begin_layout Standard
-
The output format mimics the TeX error messages format.
This function prints a number of lines residing in the global variable
\begin_inset Foot
status collapsed
-\begin_layout Standard
-
+\begin_layout Plain Layout
This function has been slightly changed from EW's original to make scanning
a bit easier with LaTeX::scanLogFile().
The test has been added because LyX can crash if empty lines are allowed
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
void
-\newline
+\end_layout
+
+\begin_layout Chunk
output_error (int buf_size, int error_line, char *tool)
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
int i;
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
fprintf(stdout, "! Build Error: ==> %s ==>
\backslash
n", tool);
-\newline
+\end_layout
+
+\begin_layout Chunk
fprintf(stdout, " ...
\backslash
n
nl.%d ...
\backslash
n", error_line);
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
for (i=0; i<buf_size; i++)
-\newline
+\end_layout
+
+\begin_layout Chunk
if (strlen(buffer[i]) != 0)
-\newline
+\end_layout
+
+\begin_layout Chunk
fprintf(stdout, "%s", buffer[i]);
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
fprintf(stdout, "
\backslash
n");
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
-@
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+@
+\end_layout
+\begin_layout Chunk
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
void output_error (int buf_size, int error_line, char *tool);
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Section
-
Functions Implementation
\end_layout
\begin_layout Standard
-
Both noweave and notangle routines, always output one single line for each
error found, thus to scan the buffer for noweb error messages is enough
to exam one input line at a time.
of the file.
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Scan input for noweb error messages>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Chunk
while (fgets(buffer[0], 200, stdin)) {
-\newline
+\end_layout
+
+\begin_layout Chunk
if (noweb_try(0))
-\newline
+\end_layout
+
+\begin_layout Chunk
output_error(1, err_line, "noweb");
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
The examination itself is very inefficient.
Unfortunately noweb doesn't have any characteristic that would help to
identify one of its error messages.
array.
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+\end_layout
+
+\begin_layout Chunk
<<Global variables>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
char *noweb_msgs[] = {
-\newline
+\end_layout
+
+\begin_layout Chunk
"couldn't open file",
-\newline
+\end_layout
+
+\begin_layout Chunk
"couldn't open temporary file",
-\newline
+\end_layout
+
+\begin_layout Chunk
"error writing temporary file",
-\newline
+\end_layout
+
+\begin_layout Chunk
"ill-formed option",
-\newline
+\end_layout
+
+\begin_layout Chunk
"unknown option",
-\newline
+\end_layout
+
+\begin_layout Chunk
"Bad format sequence",
-\newline
+\end_layout
+
+\begin_layout Chunk
"Can't open output file",
-\newline
+\end_layout
+
+\begin_layout Chunk
"Can't open temporary file",
-\newline
+\end_layout
+
+\begin_layout Chunk
"Capacity exceeded:",
-\newline
+\end_layout
+
+\begin_layout Chunk
"Ignoring unknown option -",
-\newline
+\end_layout
+
+\begin_layout Chunk
"This can't happen:",
-\newline
+\end_layout
+
+\begin_layout Chunk
"non-numeric line number in"
-\newline
+\end_layout
+
+\begin_layout Chunk
};
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
char *noweb_msgs_mimic_gcc[] = {
-\newline
+\end_layout
+
+\begin_layout Chunk
": unescaped << in documentation chunk"
-\newline
+\end_layout
+
+\begin_layout Chunk
};
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
A noweb error message can be any string that contains a matching pair of
- < <\InsetSpace ~
-\InsetSpace ~
-\InsetSpace ~
+ < <
+\begin_inset space ~
+\end_inset
+
+
+\begin_inset space ~
+\end_inset
+
+
+\begin_inset space ~
+\end_inset
+
> >, or any of the above strings
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+
+\end_layout
+\begin_layout Chunk
<<Function bodies>>=
-\newline
+\begin_inset Newline newline
+\end_inset
+
int
-\newline
+\begin_inset Newline newline
+\end_inset
+
noweb_try (int buf_line)
-\newline
+\begin_inset Newline newline
+\end_inset
+
{
-\newline
+\begin_inset Newline newline
+\end_inset
+
char *s, *t, *b;
-\newline
+\begin_inset Newline newline
+\end_inset
+
int i;
-\newline
+\begin_inset Newline newline
+\end_inset
+
+
+\begin_inset Newline newline
+\end_inset
-\newline
b = buffer[buf_line];
-\newline
+\begin_inset Newline newline
+\end_inset
+
err_line = 0;
-\newline
+\begin_inset Newline newline
+\end_inset
+
+
+\begin_inset Newline newline
+\end_inset
-\newline
for (i=0; i<1; i++) {
-\newline
+\begin_inset Newline newline
+\end_inset
+
s = (char *)strstr (b, noweb_msgs_mimic_gcc[i]);
-\newline
+\begin_inset Newline newline
+\end_inset
+
if (s != NULL) {
-\newline
+\begin_inset Newline newline
+\end_inset
+
t = (char *)strchr(buffer[buf_line], ':');
-\newline
+\begin_inset Newline newline
+\end_inset
+
err_line = atoi(t+1);
-\newline
+\begin_inset Newline newline
+\end_inset
+
t = buffer[buf_line];
-\newline
+\begin_inset Newline newline
+\end_inset
+
++s;
-\newline
+\begin_inset Newline newline
+\end_inset
+
while (*(t++) = *(s++));
-\newline
+\begin_inset Newline newline
+\end_inset
+
return 1;
-\newline
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
s = (char *)strstr(b, "<<");
-\newline
+\begin_inset Newline newline
+\end_inset
+
if (s != NULL) {
-\newline
+\begin_inset Newline newline
+\end_inset
+
s = (char *)strstr(s+2, ">>");
-\newline
+\begin_inset Newline newline
+\end_inset
+
if (s != NULL) {
-\newline
- return 1;
-\newline
+\begin_inset Newline newline
+\end_inset
+
+ return 1;
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
} else {
-\newline
+\begin_inset Newline newline
+\end_inset
+
for (i = 0; i < 12; ++i) {
-\newline
+\begin_inset Newline newline
+\end_inset
+
s = (char *)strstr (b, noweb_msgs[i]);
-\newline
+\begin_inset Newline newline
+\end_inset
+
if (s != NULL) {
-\newline
+\begin_inset Newline newline
+\end_inset
+
return 1;
-\newline
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
return 0;
-\newline
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
@
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
int noweb_try (int buf_line);
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
The xlc compiler always outputs one single line for each error found, thus
to scan the buffer for xlc error messages it is enough to exam one input
line at a time.
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Scan input for xlc error messages>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Chunk
while (fgets(buffer[last_buf_line], 200, stdin)) {
-\newline
+\end_layout
+
+\begin_layout Chunk
if (xlc_try(0))
-\newline
+\end_layout
+
+\begin_layout Chunk
output_error(1, err_line, "xlc");
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
A xlc error message is easy to identify.
Every error message starts with a quoted string with no spaces, a comma,
a space, the word
The following routine tests if a given buffer line matches this criteria:
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+
+\end_layout
+\begin_layout Chunk
+
+\end_layout
+
+\begin_layout Chunk
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
int
-\newline
+\end_layout
+
+\begin_layout Chunk
xlc_try (int buf_line)
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
char *s, *t;
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
t = buffer[buf_line];
-\newline
+\end_layout
+
+\begin_layout Chunk
s = t+1;
-\newline
+\end_layout
+
+\begin_layout Chunk
while (*s != '"' && *s != ' ' && *s != '
\backslash
0')
-\newline
+\end_layout
+
+\begin_layout Chunk
s++;
-\newline
+\end_layout
+
+\begin_layout Chunk
if (*t != '"' || *s != '"' || strncmp(s+1, ", line ", 7) != 0)
-\newline
+\end_layout
+
+\begin_layout Chunk
return 0;
-\newline
+\end_layout
+
+\begin_layout Chunk
s += 8;
-\newline
+\end_layout
+
+\begin_layout Chunk
err_line = atoi(s);
-\newline
+\end_layout
+
+\begin_layout Chunk
return 1;
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
-@
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+@
+\end_layout
+\begin_layout Chunk
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
int xlc_try (int buf_line);
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
The gcc compiler error messages are more complicated to scan.
Each error can span more than one line in the buffer.
The good news is that every buffer line on each error has the same pattern,
\end_layout
\begin_layout Standard
-
Every gcc error message contains a string with no space followed by a
\begin_inset Quotes eld
\end_inset
.
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Scan input for gcc error messages>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
char *s, *t;
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Chunk
while (fgets(buffer[last_buf_line], 200, stdin)) {
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** Skip lines until I find an error */
-\newline
+\end_layout
+
+\begin_layout Chunk
s = (char *)strpbrk(buffer[last_buf_line], " :");
-\newline
+\end_layout
+
+\begin_layout Chunk
if (s == NULL || *s == ' ')
-\newline
+\end_layout
+
+\begin_layout Chunk
continue; /* No gcc error found here */
-\newline
+\end_layout
+
+\begin_layout Chunk
do {
-\newline
+\end_layout
+
+\begin_layout Chunk
<<gcc error message criteria is to find a "...:999:" or a "...: ">>
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** OK It is an error message, get line number */
-\newline
+\end_layout
+
+\begin_layout Chunk
err_line = atoi(s+1);
-\newline
+\end_layout
+
+\begin_layout Chunk
if (last_err_line == 0 || last_err_line == err_line) {
-\newline
+\end_layout
+
+\begin_layout Chunk
last_err_line = err_line;
-\newline
+\end_layout
+
+\begin_layout Chunk
continue; /* It's either a header or a continuation, don't output
yet */
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** Completed the scan of one error message, output it to LyX
*/
-\newline
+\end_layout
+
+\begin_layout Chunk
discharge_buffer(1);
-\newline
+\end_layout
+
+\begin_layout Chunk
break;
-\newline
+\end_layout
+
+\begin_layout Chunk
} while (fgets(buffer[last_buf_line], 200, stdin));
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** EOF completes the scan of whatever was being scanned */
-\newline
+\end_layout
+
+\begin_layout Chunk
discharge_buffer(0);
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
-@
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+@
+\end_layout
+\begin_layout Chunk
<<gcc error message criteria is to find a "...:999:" or a "...: ">>=
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** Search first ":" in the error number */
-\newline
+\end_layout
+
+\begin_layout Chunk
s = (char *)strpbrk(buffer[last_buf_line], " :");
-\newline
+\end_layout
+
+\begin_layout Chunk
last_buf_line++;
-\newline
+\end_layout
+
+\begin_layout Chunk
if (s == NULL || *s == ' ')
-\newline
+\end_layout
+
+\begin_layout Chunk
<<No gcc error found here, but it might terminate the scanning of a previous
one>>
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** Search second ":" in the error number */
-\newline
+\end_layout
+
+\begin_layout Chunk
t = (char *)strpbrk(s+1, " :");
-\newline
+\begin_inset Newline newline
+\end_inset
+
if (t == NULL || *t == ' ')
-\newline
+\begin_inset Newline newline
+\end_inset
+
<<No gcc error found here, but it might terminate the scanning of a previous
one>>
-\newline
+\begin_inset Newline newline
+\end_inset
+
/****** Verify if is all digits between ":" */
-\newline
+\begin_inset Newline newline
+\end_inset
+
if (t != s+1+strspn(s+1, "0123456789"))
-\newline
+\begin_inset Newline newline
+\end_inset
+
<<No gcc error found here, but it might terminate the scanning of a previous
one>>
-\newline
+\begin_inset Newline newline
+\end_inset
+
@
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+
+\end_layout
+
+\begin_layout Chunk
+\end_layout
+
+\begin_layout Chunk
<<No gcc error found here, but it might terminate the scanning of a previous
one>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
err_line = 0;
-\newline
+\end_layout
+
+\begin_layout Chunk
discharge_buffer(1);
-\newline
+\end_layout
+
+\begin_layout Chunk
continue;
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
As we mentioned, when the scan of one gcc error message is completed everything
in the buffer except the last line is one single error message.
But if the scan terminates with a EOF or through finding one line that
In those cases we empty the buffer completely.
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+
+\end_layout
+
+\begin_layout Chunk
+
+\end_layout
+\begin_layout Chunk
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
void
-\newline
+\end_layout
+
+\begin_layout Chunk
discharge_buffer (int save_last)
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
if (last_err_line != 0) {
-\newline
+\end_layout
+
+\begin_layout Chunk
clean_gcc_messages();
-\newline
+\end_layout
+
+\begin_layout Chunk
if (save_last != 0) {
-\newline
+\end_layout
+
+\begin_layout Chunk
output_error(last_buf_line-1, last_err_line, "gcc");
-\newline
+\end_layout
+
+\begin_layout Chunk
strcpy (buffer[0], buffer[last_buf_line-1]);
-\newline
+\end_layout
+
+\begin_layout Chunk
last_err_line = err_line;
-\newline
+\end_layout
+
+\begin_layout Chunk
last_buf_line = 1;
-\newline
+\end_layout
+
+\begin_layout Chunk
} else {
-\newline
+\end_layout
+
+\begin_layout Chunk
++last_buf_line;
-\newline
+\end_layout
+
+\begin_layout Chunk
clean_gcc_messages();
-\newline
+\end_layout
+
+\begin_layout Chunk
output_error(last_buf_line-1, last_err_line, "gcc");
-\newline
+\end_layout
+
+\begin_layout Chunk
last_err_line = 0;
-\newline
+\end_layout
+
+\begin_layout Chunk
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
-@
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+@
+\end_layout
+\begin_layout Chunk
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
void discharge_buffer (int save_last);
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
The next function
\begin_inset Quotes eld
\end_inset
\begin_inset Foot
status collapsed
-\begin_layout Standard
-
+\begin_layout Plain Layout
More could be done.
For instance, some way of distinguishing between gcc Errors and Warnings
should be devised.
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
void
-\newline
+\end_layout
+
+\begin_layout Chunk
clean_gcc_messages ()
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
int index;
-\newline
+\end_layout
+
+\begin_layout Chunk
char search [30];
-\newline
+\end_layout
+
+\begin_layout Chunk
char *tail, *head;
-\newline
+\end_layout
+
+\begin_layout Chunk
int search_len = sprintf(search, ".nw:%d:", last_err_line);
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
for (index = 0; index < last_buf_line-1; index++) {
-\newline
+\end_layout
+
+\begin_layout Chunk
tail = (char *)strstr (buffer[index], search);
-\newline
+\end_layout
+
+\begin_layout Chunk
if ( tail == NULL) {
-\newline
+\end_layout
+
+\begin_layout Chunk
tail = (char *) strstr (buffer[index], ".nw:");
-\newline
+\end_layout
+
+\begin_layout Chunk
if (tail) {
-\newline
+\end_layout
+
+\begin_layout Chunk
tail += 4;
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
} else {
-\newline
+\end_layout
+
+\begin_layout Chunk
tail += search_len;
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
if (tail != NULL) {
-\newline
+\end_layout
+
+\begin_layout Chunk
head = buffer[index];
-\newline
+\end_layout
+
+\begin_layout Chunk
while (*(head++) = *(tail++));
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
-@
\end_layout
-\begin_layout Scrap
+\begin_layout Chunk
+@
+\end_layout
+\begin_layout Chunk
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
void clean_gcc_messages ();
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
To combine the scan of noweb error messages and xlc error messages is very
simple.
We just try each one for every input line:
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<AIX system using both noweb and xlc>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
last_buf_line = 0;
-\newline
+\begin_inset Newline newline
+\end_inset
+
while (fgets(buffer[0], 200, stdin)) {
-\newline
+\begin_inset Newline newline
+\end_inset
+
if (noweb_try(0))
-\newline
+\begin_inset Newline newline
+\end_inset
+
output_error(1, err_line, "noweb");
-\newline
+\begin_inset Newline newline
+\end_inset
+
else if (xlc_try(0))
-\newline
+\begin_inset Newline newline
+\end_inset
+
output_error(1, err_line, "xlc");
-\newline
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
}
-\newline
+\begin_inset Newline newline
+\end_inset
+
@
\end_layout
\begin_layout Standard
-
To combine the scan of noweb error messages and gcc error messages is simple
if we realize that it is not possible to find a noweb error message in
the middle of a gcc error message.
the beginning of the scan:
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<Solaris and Linux systems using both noweb and gcc>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
{
-\newline
+\end_layout
+
+\begin_layout Chunk
char *s, *t;
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Chunk
while (fgets(buffer[last_buf_line], 200, stdin)) {
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** Skip lines until I find an error */
-\newline
+\end_layout
+
+\begin_layout Chunk
if (last_buf_line == 0 && noweb_try(0)) {
-\newline
+\end_layout
+
+\begin_layout Chunk
output_error(1, err_line, "noweb");
-\newline
+\end_layout
+
+\begin_layout Chunk
continue;
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
s = (char *)strpbrk(buffer[last_buf_line], " :");
-\newline
+\end_layout
+
+\begin_layout Chunk
if (s == NULL || *s == ' ')
-\newline
+\end_layout
+
+\begin_layout Chunk
continue; /* No gcc error found here */
-\newline
+\end_layout
+
+\begin_layout Chunk
do {
-\newline
+\end_layout
+
+\begin_layout Chunk
<<gcc error message criteria is to find a "...:999:" or a "...: ">>
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** OK It is an error, get line number */
-\newline
+\end_layout
+
+\begin_layout Chunk
err_line = atoi(s+1);
-\newline
+\end_layout
+
+\begin_layout Chunk
if (last_err_line == 0 || last_err_line == err_line) {
-\newline
+\end_layout
+
+\begin_layout Chunk
last_err_line = err_line;
-\newline
+\end_layout
+
+\begin_layout Chunk
continue; /* It's either a header or a continuation, don't output
yet */
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** Completed the scan of one error message, output it to LyX
*/
-\newline
+\end_layout
+
+\begin_layout Chunk
discharge_buffer(1);
-\newline
+\end_layout
+
+\begin_layout Chunk
break;
-\newline
+\end_layout
+
+\begin_layout Chunk
} while (fgets(buffer[last_buf_line], 200, stdin));
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
/****** EOF completes the scan of whatever was being scanned */
-\newline
+\end_layout
+
+\begin_layout Chunk
discharge_buffer(0);
-\newline
+\end_layout
+
+\begin_layout Chunk
}
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Section
-
Wrapping the code into a file
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<listerrors.c>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
#include <stdio.h>
-\newline
+\end_layout
+
+\begin_layout Chunk
#include <strings.h>
-\newline
+\end_layout
+
+\begin_layout Chunk
-\newline
+\end_layout
+
+\begin_layout Chunk
<<Global variables>>
-\newline
+\end_layout
+
+\begin_layout Chunk
<<Function prototypes>>
-\newline
+\end_layout
+
+\begin_layout Chunk
<<Function bodies>>
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
To build this program, we want to add the
\begin_inset Quotes eld
\end_inset
option to gcc.
\end_layout
-\begin_layout Scrap
-
+\begin_layout Chunk
<<build-script>>=
-\newline
+\end_layout
+
+\begin_layout Chunk
#!/bin/sh
-\newline
+\end_layout
+
+\begin_layout Chunk
if [ -z "$NOWEB_SOURCE" ]; then NOWEB_SOURCE=Literate.nw; fi
-\newline
-notangle -L -Rlisterrors.c ${NOWEB_SOURCE} > listerrors.c
-\newline
+\end_layout
+
+\begin_layout Chunk
+if [ -z "$NOWEB_OUTPUT_DIR" ]; then NOWEB_OUTPUT_DIR=.; fi
+\end_layout
+
+\begin_layout Chunk
+notangle -L -Rlisterrors.c ${NOWEB_SOURCE} > ${NOWEB_OUTPUT_DIR}/listerrors.c
+\end_layout
+
+\begin_layout Chunk
gcc -g -o listerrors listerrors.c
-\newline
+\end_layout
+
+\begin_layout Chunk
@
\end_layout
\begin_layout Standard
-
This project can be tangled and compiled from LyX if you set
\family typewriter
\backslash
build_command
\family default
- to call a generic script that always extracts a scrap named
+ to call a generic script that always extracts a chunk named
\family typewriter
build-script
\family default
\end_layout
\begin_layout LyX-Code
-
#!/bin/sh
-\newline
-notangle -Rbuild-script $1 | env NOWEB_SOURCE=$1 sh
+\begin_inset Newline newline
+\end_inset
+
+notangle -Rbuild-script $1 | env NOWEB_SOURCE=$1 NOWEB_OUTPUT_DIR=$r sh
\end_layout
\begin_layout LyX-Code
projects / lyx.git / blobdiff