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[/] [eco32/] [trunk/] [lcc/] [src/] [input.c] - Blame information for rev 149

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#include "c.h"
 
static char rcsid[] = "$Id: input.c,v 1.1 2002/08/28 23:12:44 drh Exp $";
 
static void pragma(void);
static void resynch(void);
 
static int bsize;
static unsigned char buffer[MAXLINE+1 + BUFSIZE+1];
unsigned char *cp;      /* current input character */
char *file;             /* current input file name */
char *firstfile;        /* first input file */
unsigned char *limit;   /* points to last character + 1 */
char *line;             /* current line */
int lineno;             /* line number of current line */
 
void nextline(void) {
        do {
                if (cp >= limit) {
                        fillbuf();
                        if (cp >= limit)
                                cp = limit;
                        if (cp == limit)
                                return;
                } else {
                        lineno++;
                        for (line = (char *)cp; *cp==' ' || *cp=='\t'; cp++)
                                ;
                        if (*cp == '#') {
                                resynch();
                                nextline();
                        }
                }
        } while (*cp == '\n' && cp == limit);
}
void fillbuf(void) {
        if (bsize == 0)
                return;
        if (cp >= limit)
                cp = &buffer[MAXLINE+1];
        else
                {
                        int n = limit - cp;
                        unsigned char *s = &buffer[MAXLINE+1] - n;
                        assert(s >= buffer);
                        line = (char *)s - ((char *)cp - line);
                        while (cp < limit)
                                *s++ = *cp++;
                        cp = &buffer[MAXLINE+1] - n;
                }
        if (feof(stdin))
                bsize = 0;
        else
                bsize = fread(&buffer[MAXLINE+1], 1, BUFSIZE, stdin);
        if (bsize < 0) {
                error("read error\n");
                exit(EXIT_FAILURE);
        }
        limit = &buffer[MAXLINE+1+bsize];
        *limit = '\n';
}
void input_init(int argc, char *argv[]) {
        static int inited;
 
        if (inited)
                return;
        inited = 1;
        main_init(argc, argv);
        limit = cp = &buffer[MAXLINE+1];
        bsize = -1;
        lineno = 0;
        file = NULL;
        fillbuf();
        if (cp >= limit)
                cp = limit;
        nextline();
}
 
/* ident - handle #ident "string" */
static void ident(void) {
        while (*cp != '\n' && *cp != '\0')
                cp++;
}
 
/* pragma - handle #pragma ref id... */
static void pragma(void) {
        if ((t = gettok()) == ID && strcmp(token, "ref") == 0)
                for (;;) {
                        while (*cp == ' ' || *cp == '\t')
                                cp++;
                        if (*cp == '\n' || *cp == 0)
                                break;
                        if ((t = gettok()) == ID && tsym) {
                                tsym->ref++;
                                use(tsym, src);
                        }
                }
}
 
/* resynch - set line number/file name in # n [ "file" ], #pragma, etc. */
static void resynch(void) {
        for (cp++; *cp == ' ' || *cp == '\t'; )
                cp++;
        if (limit - cp < MAXLINE)
                fillbuf();
        if (strncmp((char *)cp, "pragma", 6) == 0) {
                cp += 6;
                pragma();
        } else if (strncmp((char *)cp, "ident", 5) == 0) {
                cp += 5;
                ident();
        } else if (*cp >= '0' && *cp <= '9') {
        line:   for (lineno = 0; *cp >= '0' && *cp <= '9'; )
                        lineno = 10*lineno + *cp++ - '0';
                lineno--;
                while (*cp == ' ' || *cp == '\t')
                        cp++;
                if (*cp == '"') {
                        file = (char *)++cp;
                        while (*cp && *cp != '"' && *cp != '\n')
                                cp++;
                        file = stringn(file, (char *)cp - file);
                        if (*cp == '\n')
                                warning("missing \" in preprocessor line\n");
                        if (firstfile == 0)
                                firstfile = file;
                }
        } else if (strncmp((char *)cp, "line", 4) == 0) {
                for (cp += 4; *cp == ' ' || *cp == '\t'; )
                        cp++;
                if (*cp >= '0' && *cp <= '9')
                        goto line;
                if (Aflag >= 2)
                        warning("unrecognized control line\n");
        } else if (Aflag >= 2 && *cp != '\n')
                warning("unrecognized control line\n");
        while (*cp)
                if (*cp++ == '\n')
                        if (cp == limit + 1) {
                                nextline();
                                if (cp == limit)
                                        break;
                        } else
                                break;
}
 

Line No.	Rev	Author	Line
1	4	hellwig	`#include "c.h"`
2
3			`static char rcsid[] = "$Id: input.c,v 1.1 2002/08/28 23:12:44 drh Exp $";`
4
5			`static void pragma(void);`
6			`static void resynch(void);`
7
8			`static int bsize;`
9			`static unsigned char buffer[MAXLINE+1 + BUFSIZE+1];`
10			`unsigned char cp; / current input character */`
11			`char file; / current input file name */`
12			`char firstfile; / first input file */`
13			`unsigned char limit; / points to last character + 1 */`
14			`char line; / current line */`
15			`int lineno; /* line number of current line */`
16
17			`void nextline(void) {`
18			`do {`
19			`if (cp >= limit) {`
20			`fillbuf();`
21			`if (cp >= limit)`
22			`cp = limit;`
23			`if (cp == limit)`
24			`return;`
25			`} else {`
26			`lineno++;`
27			`for (line = (char )cp; cp==' ' \|\| *cp=='\t'; cp++)`
28			`;`
29			`if (*cp == '#') {`
30			`resynch();`
31			`nextline();`
32			`}`
33			`}`
34			`} while (*cp == '\n' && cp == limit);`
35			`}`
36			`void fillbuf(void) {`
37			`if (bsize == 0)`
38			`return;`
39			`if (cp >= limit)`
40			`cp = &buffer[MAXLINE+1];`
41			`else`
42			`{`
43			`int n = limit - cp;`
44			`unsigned char *s = &buffer[MAXLINE+1] - n;`
45			`assert(s >= buffer);`
46			`line = (char )s - ((char )cp - line);`
47			`while (cp < limit)`
48			`s++ = cp++;`
49			`cp = &buffer[MAXLINE+1] - n;`
50			`}`
51			`if (feof(stdin))`
52			`bsize = 0;`
53			`else`
54			`bsize = fread(&buffer[MAXLINE+1], 1, BUFSIZE, stdin);`
55			`if (bsize < 0) {`
56			`error("read error\n");`
57			`exit(EXIT_FAILURE);`
58			`}`
59			`limit = &buffer[MAXLINE+1+bsize];`
60			`*limit = '\n';`
61			`}`
62			`void input_init(int argc, char *argv[]) {`
63			`static int inited;`
64
65			`if (inited)`
66			`return;`
67			`inited = 1;`
68			`main_init(argc, argv);`
69			`limit = cp = &buffer[MAXLINE+1];`
70			`bsize = -1;`
71			`lineno = 0;`
72			`file = NULL;`
73			`fillbuf();`
74			`if (cp >= limit)`
75			`cp = limit;`
76			`nextline();`
77			`}`
78
79			`/* ident - handle #ident "string" */`
80			`static void ident(void) {`
81			`while (cp != '\n' && cp != '\0')`
82			`cp++;`
83			`}`
84
85			`/* pragma - handle #pragma ref id... */`
86			`static void pragma(void) {`
87			`if ((t = gettok()) == ID && strcmp(token, "ref") == 0)`
88			`for (;;) {`
89			`while (cp == ' ' \|\| cp == '\t')`
90			`cp++;`
91			`if (cp == '\n' \|\| cp == 0)`
92			`break;`
93			`if ((t = gettok()) == ID && tsym) {`
94			`tsym->ref++;`
95			`use(tsym, src);`
96			`}`
97			`}`
98			`}`
99
100			`/* resynch - set line number/file name in # n [ "file" ], #pragma, etc. */`
101			`static void resynch(void) {`
102			`for (cp++; cp == ' ' \|\| cp == '\t'; )`
103			`cp++;`
104			`if (limit - cp < MAXLINE)`
105			`fillbuf();`
106			`if (strncmp((char *)cp, "pragma", 6) == 0) {`
107			`cp += 6;`
108			`pragma();`
109			`} else if (strncmp((char *)cp, "ident", 5) == 0) {`
110			`cp += 5;`
111			`ident();`
112			`} else if (cp >= '0' && cp <= '9') {`
113			`line: for (lineno = 0; cp >= '0' && cp <= '9'; )`
114			`lineno = 10lineno + cp++ - '0';`
115			`lineno--;`
116			`while (cp == ' ' \|\| cp == '\t')`
117			`cp++;`
118			`if (*cp == '"') {`
119			`file = (char *)++cp;`
120			`while (cp && cp != '"' && *cp != '\n')`
121			`cp++;`
122			`file = stringn(file, (char *)cp - file);`
123			`if (*cp == '\n')`
124			`warning("missing \" in preprocessor line\n");`
125			`if (firstfile == 0)`
126			`firstfile = file;`
127			`}`
128			`} else if (strncmp((char *)cp, "line", 4) == 0) {`
129			`for (cp += 4; cp == ' ' \|\| cp == '\t'; )`
130			`cp++;`
131			`if (cp >= '0' && cp <= '9')`
132			`goto line;`
133			`if (Aflag >= 2)`
134			`warning("unrecognized control line\n");`
135			`} else if (Aflag >= 2 && *cp != '\n')`
136			`warning("unrecognized control line\n");`
137			`while (*cp)`
138			`if (*cp++ == '\n')`
139			`if (cp == limit + 1) {`
140			`nextline();`
141			`if (cp == limit)`
142			`break;`
143			`} else`
144			`break;`
145			`}`
146

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[/] [eco32/] [trunk/] [lcc/] [src/] [input.c] - Blame information for rev 149