diff options
| -rw-r--r-- | rf.c | 120 |
1 files changed, 120 insertions, 0 deletions
@@ -0,0 +1,120 @@ +#include <ctype.h> +#include <err.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> +#include <string.h> +#include <unistd.h> + +#define DEFMAX 300 + +struct ref { + char *a; + char *y; + char *t; + char *q; + char *d; + char *c; + char *p; + char *w; +}; + +char format_extra[DEFMAX+1]; +char format_full[DEFMAX+1]; +char format_list[DEFMAX+1]; +int refs_s; +struct ref *refs; + +void record(char *dest) { + char c; + int i; + i = 0; + while (read(STDIN_FILENO, &c, 1) != 0 && isspace(c)) + ; + while (read(STDIN_FILENO, &c, 1) != 0) + dest[i++] = c; + dest[i] = '\0'; +} + +int main() { + char c, *buf, last[4]; + int i, buf_s, ref_i; + + buf_s = 200; + buf = malloc((buf_s+1) * sizeof(char)); + if (buf == NULL) err(1, "malloc"); + +#define reset(n) do { \ + strncpy(last, " ", 4); \ + i =- n; \ + buf[i] = '\0'; \ +} while (0) + + i = 0; + ref_i = -1; + +next: + while (read(STDIN_FILENO, &c, 1) != 0) { + if (strncmp(last, "\n.F", 3) != 0) + goto ref; + + /* record format def */ + switch (last[4]) { + case 'f': + record(format_full); + break; + case 'x': + record(format_extra); + break; + case 'l': + record(format_list); + break; + default: + goto add; + } + reset(3); + goto next; + +ref: + if (strncmp(last, "\n.R", 3) != 0) + goto add; + + /* record reference def */ + switch(last[4]) { + case 'a': + reset(3); + if (ref_i+1 > refs_s) { + refs_s += 10; + refs = realloc(refs, refs_s*sizeof(struct ref)); + if (refs == NULL) err(1, "realloc"); + } + ref_i++; + refs[ref_i].a = malloc((DEFMAX+1) * sizeof(char)); + if (refs[ref_i].a == NULL) err(1, "malloc"); + record(refs[ref_i].a); + break; + case 'y': + break; + default: + goto add; + } + reset(3); + goto next; + +add: + /* add to buffer */ + if (i+1 > buf_s) { + buf_s += 100; + buf = realloc(buf, (buf_s+1) * sizeof(char)); + if (buf == NULL) err(1, "realloc"); + } + buf[i++] = c; + + /* keep track of last 4 characters */ + if (i <= 4) last[i] = c; + else { + memmove(last, last+1, 3); + last[3] = c; + } + } +} |