-#LyX 1.4.0cvs created this file. For more info see http://www.lyx.org/
-\lyxformat 243
+#LyX 2.0 created this file. For more info see http://www.lyx.org/
+\lyxformat 413
\begin_document
\begin_header
\textclass literate-article
+\use_default_options false
+\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_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_esint 0
+\use_mhchem 1
+\use_mathdots 1
\cite_engine basic
\use_bibtopic false
+\use_indices false
\paperorientation portrait
+\suppress_date false
+\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
-\quotes_times 2
\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
-
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
int
-\newline
+\end_layout
+
+\begin_layout Scrap
main (int argc, char **argv)
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
if (argc == 2) {
-\newline
+\end_layout
+
+\begin_layout Scrap
switch (argv[1][0]) {
-\newline
+\end_layout
+
+\begin_layout Scrap
case 'n':
-\newline
+\end_layout
+
+\begin_layout Scrap
<<Scan input for noweb error messages>>
-\newline
+\end_layout
+
+\begin_layout Scrap
break;
-\newline
+\end_layout
+
+\begin_layout Scrap
case 'x':
-\newline
+\end_layout
+
+\begin_layout Scrap
<<Scan input for xlc error messages>>
-\newline
+\end_layout
+
+\begin_layout Scrap
break;
-\newline
+\end_layout
+
+\begin_layout Scrap
case 'a':
-\newline
+\end_layout
+
+\begin_layout Scrap
<<AIX system using both noweb and xlc>>
-\newline
+\end_layout
+
+\begin_layout Scrap
break;
-\newline
+\end_layout
+
+\begin_layout Scrap
case 's':
-\newline
+\end_layout
+
+\begin_layout Scrap
case 'b':
-\newline
+\end_layout
+
+\begin_layout Scrap
<<Solaris and Linux systems using both noweb and gcc>>
-\newline
+\end_layout
+
+\begin_layout Scrap
break;
-\newline
+\end_layout
+
+\begin_layout Scrap
case 'g':
-\newline
+\end_layout
+
+\begin_layout Scrap
default:
-\newline
+\end_layout
+
+\begin_layout Scrap
<<Scan input for gcc error messages>>
-\newline
+\end_layout
+
+\begin_layout Scrap
break;
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
} else {
-\newline
+\end_layout
+
+\begin_layout Scrap
<<Scan input for gcc error messages>>
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
-@
\end_layout
\begin_layout Scrap
+@
+\end_layout
+\begin_layout Scrap
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
int main (int argc, char **argv);
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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
\end_layout
\begin_layout Scrap
-
<<Global variables>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
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
-
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
void
-\newline
+\end_layout
+
+\begin_layout Scrap
output_error (int buf_size, int error_line, char *tool)
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
int i;
-\newline
+\end_layout
+
+\begin_layout Scrap
-\newline
+\end_layout
+
+\begin_layout Scrap
fprintf(stdout, "! Build Error: ==> %s ==>
\backslash
n", tool);
-\newline
+\end_layout
+
+\begin_layout Scrap
fprintf(stdout, " ...
\backslash
n
nl.%d ...
\backslash
n", error_line);
-\newline
+\end_layout
+
+\begin_layout Scrap
-\newline
+\end_layout
+
+\begin_layout Scrap
for (i=0; i<buf_size; i++)
-\newline
+\end_layout
+
+\begin_layout Scrap
if (strlen(buffer[i]) != 0)
-\newline
+\end_layout
+
+\begin_layout Scrap
fprintf(stdout, "%s", buffer[i]);
-\newline
+\end_layout
+
+\begin_layout Scrap
-\newline
+\end_layout
+
+\begin_layout Scrap
fprintf(stdout, "
\backslash
n");
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
-@
\end_layout
\begin_layout Scrap
+@
+\end_layout
+\begin_layout Scrap
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
void output_error (int buf_size, int error_line, char *tool);
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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.
\end_layout
\begin_layout Scrap
-
<<Scan input for noweb error messages>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Scrap
while (fgets(buffer[0], 200, stdin)) {
-\newline
+\end_layout
+
+\begin_layout Scrap
if (noweb_try(0))
-\newline
+\end_layout
+
+\begin_layout Scrap
output_error(1, err_line, "noweb");
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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.
\begin_layout Scrap
+\end_layout
+
+\begin_layout Scrap
<<Global variables>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
char *noweb_msgs[] = {
-\newline
+\end_layout
+
+\begin_layout Scrap
"couldn't open file",
-\newline
+\end_layout
+
+\begin_layout Scrap
"couldn't open temporary file",
-\newline
+\end_layout
+
+\begin_layout Scrap
"error writing temporary file",
-\newline
+\end_layout
+
+\begin_layout Scrap
"ill-formed option",
-\newline
+\end_layout
+
+\begin_layout Scrap
"unknown option",
-\newline
+\end_layout
+
+\begin_layout Scrap
"Bad format sequence",
-\newline
+\end_layout
+
+\begin_layout Scrap
"Can't open output file",
-\newline
+\end_layout
+
+\begin_layout Scrap
"Can't open temporary file",
-\newline
+\end_layout
+
+\begin_layout Scrap
"Capacity exceeded:",
-\newline
+\end_layout
+
+\begin_layout Scrap
"Ignoring unknown option -",
-\newline
+\end_layout
+
+\begin_layout Scrap
"This can't happen:",
-\newline
- "non-numeric line number in"
-\newline
-};
-\newline
+\end_layout
-\newline
-char *noweb_msgs_mimic_gcc[] = {
-\newline
+\begin_layout Scrap
+ "non-numeric line number in"
+\end_layout
+
+\begin_layout Scrap
+};
+\end_layout
+
+\begin_layout Scrap
+
+\end_layout
+
+\begin_layout Scrap
+char *noweb_msgs_mimic_gcc[] = {
+\end_layout
+
+\begin_layout Scrap
": unescaped << in documentation chunk"
-\newline
+\end_layout
+
+\begin_layout Scrap
};
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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
+\end_layout
+
+\begin_layout Scrap
<<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
+\begin_inset Newline newline
+\end_inset
+
return 1;
-\newline
+\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
-
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
int noweb_try (int buf_line);
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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
-
<<Scan input for xlc error messages>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Scrap
while (fgets(buffer[last_buf_line], 200, stdin)) {
-\newline
+\end_layout
+
+\begin_layout Scrap
if (xlc_try(0))
-\newline
+\end_layout
+
+\begin_layout Scrap
output_error(1, err_line, "xlc");
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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
\begin_layout Scrap
+\end_layout
+
+\begin_layout Scrap
+
+\end_layout
+
+\begin_layout Scrap
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
int
-\newline
+\end_layout
+
+\begin_layout Scrap
xlc_try (int buf_line)
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
char *s, *t;
-\newline
+\end_layout
+
+\begin_layout Scrap
-\newline
+\end_layout
+
+\begin_layout Scrap
t = buffer[buf_line];
-\newline
+\end_layout
+
+\begin_layout Scrap
s = t+1;
-\newline
+\end_layout
+
+\begin_layout Scrap
while (*s != '"' && *s != ' ' && *s != '
\backslash
0')
-\newline
+\end_layout
+
+\begin_layout Scrap
s++;
-\newline
+\end_layout
+
+\begin_layout Scrap
if (*t != '"' || *s != '"' || strncmp(s+1, ", line ", 7) != 0)
-\newline
+\end_layout
+
+\begin_layout Scrap
return 0;
-\newline
+\end_layout
+
+\begin_layout Scrap
s += 8;
-\newline
+\end_layout
+
+\begin_layout Scrap
err_line = atoi(s);
-\newline
+\end_layout
+
+\begin_layout Scrap
return 1;
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
-@
\end_layout
\begin_layout Scrap
+@
+\end_layout
+\begin_layout Scrap
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
int xlc_try (int buf_line);
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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
-
<<Scan input for gcc error messages>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
char *s, *t;
-\newline
+\end_layout
+
+\begin_layout Scrap
-\newline
+\end_layout
+
+\begin_layout Scrap
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Scrap
while (fgets(buffer[last_buf_line], 200, stdin)) {
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** Skip lines until I find an error */
-\newline
+\end_layout
+
+\begin_layout Scrap
s = (char *)strpbrk(buffer[last_buf_line], " :");
-\newline
+\end_layout
+
+\begin_layout Scrap
if (s == NULL || *s == ' ')
-\newline
+\end_layout
+
+\begin_layout Scrap
continue; /* No gcc error found here */
-\newline
+\end_layout
+
+\begin_layout Scrap
do {
-\newline
+\end_layout
+
+\begin_layout Scrap
<<gcc error message criteria is to find a "...:999:" or a "...: ">>
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** OK It is an error message, get line number */
-\newline
+\end_layout
+
+\begin_layout Scrap
err_line = atoi(s+1);
-\newline
+\end_layout
+
+\begin_layout Scrap
if (last_err_line == 0 || last_err_line == err_line) {
-\newline
+\end_layout
+
+\begin_layout Scrap
last_err_line = err_line;
-\newline
+\end_layout
+
+\begin_layout Scrap
continue; /* It's either a header or a continuation, don't output
yet */
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** Completed the scan of one error message, output it to LyX
*/
-\newline
+\end_layout
+
+\begin_layout Scrap
discharge_buffer(1);
-\newline
+\end_layout
+
+\begin_layout Scrap
break;
-\newline
+\end_layout
+
+\begin_layout Scrap
} while (fgets(buffer[last_buf_line], 200, stdin));
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** EOF completes the scan of whatever was being scanned */
-\newline
+\end_layout
+
+\begin_layout Scrap
discharge_buffer(0);
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
-@
\end_layout
\begin_layout Scrap
+@
+\end_layout
+\begin_layout Scrap
<<gcc error message criteria is to find a "...:999:" or a "...: ">>=
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** Search first ":" in the error number */
-\newline
+\end_layout
+
+\begin_layout Scrap
s = (char *)strpbrk(buffer[last_buf_line], " :");
-\newline
+\end_layout
+
+\begin_layout Scrap
last_buf_line++;
-\newline
+\end_layout
+
+\begin_layout Scrap
if (s == NULL || *s == ' ')
-\newline
+\end_layout
+
+\begin_layout Scrap
<<No gcc error found here, but it might terminate the scanning of a previous
one>>
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** Search second ":" in the error number */
-\newline
+\end_layout
+
+\begin_layout Scrap
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
+\end_layout
+
+\begin_layout Scrap
+
+\end_layout
+
+\begin_layout Scrap
<<No gcc error found here, but it might terminate the scanning of a previous
one>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
err_line = 0;
-\newline
+\end_layout
+
+\begin_layout Scrap
discharge_buffer(1);
-\newline
+\end_layout
+
+\begin_layout Scrap
continue;
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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
\begin_layout Scrap
+\end_layout
+
+\begin_layout Scrap
+
+\end_layout
+
+\begin_layout Scrap
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
void
-\newline
+\end_layout
+
+\begin_layout Scrap
discharge_buffer (int save_last)
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
if (last_err_line != 0) {
-\newline
+\end_layout
+
+\begin_layout Scrap
clean_gcc_messages();
-\newline
+\end_layout
+
+\begin_layout Scrap
if (save_last != 0) {
-\newline
+\end_layout
+
+\begin_layout Scrap
output_error(last_buf_line-1, last_err_line, "gcc");
-\newline
+\end_layout
+
+\begin_layout Scrap
strcpy (buffer[0], buffer[last_buf_line-1]);
-\newline
+\end_layout
+
+\begin_layout Scrap
last_err_line = err_line;
-\newline
+\end_layout
+
+\begin_layout Scrap
last_buf_line = 1;
-\newline
+\end_layout
+
+\begin_layout Scrap
} else {
-\newline
+\end_layout
+
+\begin_layout Scrap
++last_buf_line;
-\newline
+\end_layout
+
+\begin_layout Scrap
clean_gcc_messages();
-\newline
+\end_layout
+
+\begin_layout Scrap
output_error(last_buf_line-1, last_err_line, "gcc");
-\newline
+\end_layout
+
+\begin_layout Scrap
last_err_line = 0;
-\newline
+\end_layout
+
+\begin_layout Scrap
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
-@
\end_layout
\begin_layout Scrap
+@
+\end_layout
+\begin_layout Scrap
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
void discharge_buffer (int save_last);
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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
-
<<Function bodies>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
void
-\newline
+\end_layout
+
+\begin_layout Scrap
clean_gcc_messages ()
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
int index;
-\newline
+\end_layout
+
+\begin_layout Scrap
char search [30];
-\newline
+\end_layout
+
+\begin_layout Scrap
char *tail, *head;
-\newline
+\end_layout
+
+\begin_layout Scrap
int search_len = sprintf(search, ".nw:%d:", last_err_line);
-\newline
+\end_layout
+
+\begin_layout Scrap
-\newline
+\end_layout
+
+\begin_layout Scrap
for (index = 0; index < last_buf_line-1; index++) {
-\newline
+\end_layout
+
+\begin_layout Scrap
tail = (char *)strstr (buffer[index], search);
-\newline
+\end_layout
+
+\begin_layout Scrap
if ( tail == NULL) {
-\newline
+\end_layout
+
+\begin_layout Scrap
tail = (char *) strstr (buffer[index], ".nw:");
-\newline
+\end_layout
+
+\begin_layout Scrap
if (tail) {
-\newline
+\end_layout
+
+\begin_layout Scrap
tail += 4;
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
} else {
-\newline
+\end_layout
+
+\begin_layout Scrap
tail += search_len;
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
if (tail != NULL) {
-\newline
+\end_layout
+
+\begin_layout Scrap
head = buffer[index];
-\newline
+\end_layout
+
+\begin_layout Scrap
while (*(head++) = *(tail++));
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
-@
\end_layout
\begin_layout Scrap
+@
+\end_layout
+\begin_layout Scrap
<<Function prototypes>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
void clean_gcc_messages ();
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\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
-
<<AIX system using both noweb and xlc>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
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.
\end_layout
\begin_layout Scrap
-
<<Solaris and Linux systems using both noweb and gcc>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
{
-\newline
+\end_layout
+
+\begin_layout Scrap
char *s, *t;
-\newline
+\end_layout
+
+\begin_layout Scrap
-\newline
+\end_layout
+
+\begin_layout Scrap
last_buf_line = 0;
-\newline
+\end_layout
+
+\begin_layout Scrap
while (fgets(buffer[last_buf_line], 200, stdin)) {
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** Skip lines until I find an error */
-\newline
+\end_layout
+
+\begin_layout Scrap
if (last_buf_line == 0 && noweb_try(0)) {
-\newline
+\end_layout
+
+\begin_layout Scrap
output_error(1, err_line, "noweb");
-\newline
+\end_layout
+
+\begin_layout Scrap
continue;
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
s = (char *)strpbrk(buffer[last_buf_line], " :");
-\newline
+\end_layout
+
+\begin_layout Scrap
if (s == NULL || *s == ' ')
-\newline
+\end_layout
+
+\begin_layout Scrap
continue; /* No gcc error found here */
-\newline
+\end_layout
+
+\begin_layout Scrap
do {
-\newline
+\end_layout
+
+\begin_layout Scrap
<<gcc error message criteria is to find a "...:999:" or a "...: ">>
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** OK It is an error, get line number */
-\newline
+\end_layout
+
+\begin_layout Scrap
err_line = atoi(s+1);
-\newline
+\end_layout
+
+\begin_layout Scrap
if (last_err_line == 0 || last_err_line == err_line) {
-\newline
+\end_layout
+
+\begin_layout Scrap
last_err_line = err_line;
-\newline
+\end_layout
+
+\begin_layout Scrap
continue; /* It's either a header or a continuation, don't output
yet */
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** Completed the scan of one error message, output it to LyX
*/
-\newline
+\end_layout
+
+\begin_layout Scrap
discharge_buffer(1);
-\newline
+\end_layout
+
+\begin_layout Scrap
break;
-\newline
+\end_layout
+
+\begin_layout Scrap
} while (fgets(buffer[last_buf_line], 200, stdin));
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
/****** EOF completes the scan of whatever was being scanned */
-\newline
+\end_layout
+
+\begin_layout Scrap
discharge_buffer(0);
-\newline
+\end_layout
+
+\begin_layout Scrap
}
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\end_layout
\begin_layout Section
-
Wrapping the code into a file
\end_layout
\begin_layout Scrap
-
<<listerrors.c>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
#include <stdio.h>
-\newline
+\end_layout
+
+\begin_layout Scrap
#include <strings.h>
-\newline
+\end_layout
+
+\begin_layout Scrap
-\newline
+\end_layout
+
+\begin_layout Scrap
<<Global variables>>
-\newline
+\end_layout
+
+\begin_layout Scrap
<<Function prototypes>>
-\newline
+\end_layout
+
+\begin_layout Scrap
<<Function bodies>>
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\end_layout
\begin_layout Standard
-
To build this program, we want to add the
\begin_inset Quotes eld
\end_inset
\end_layout
\begin_layout Scrap
-
<<build-script>>=
-\newline
+\end_layout
+
+\begin_layout Scrap
#!/bin/sh
-\newline
+\end_layout
+
+\begin_layout Scrap
if [ -z "$NOWEB_SOURCE" ]; then NOWEB_SOURCE=Literate.nw; fi
-\newline
+\end_layout
+
+\begin_layout Scrap
notangle -L -Rlisterrors.c ${NOWEB_SOURCE} > listerrors.c
-\newline
+\end_layout
+
+\begin_layout Scrap
gcc -g -o listerrors listerrors.c
-\newline
+\end_layout
+
+\begin_layout Scrap
@
\end_layout
\begin_layout Standard
-
This project can be tangled and compiled from LyX if you set
\family typewriter
\end_layout
\begin_layout LyX-Code
-
#!/bin/sh
-\newline
+\begin_inset Newline newline
+\end_inset
+
notangle -Rbuild-script $1 | env NOWEB_SOURCE=$1 sh
\end_layout
projects / lyx.git / blobdiff