diff options
Diffstat (limited to 'assorted')
| -rw-r--r-- | assorted/.gitignore | 1 | ||||
| -rw-r--r-- | assorted/Makefile.am | 7 | ||||
| -rw-r--r-- | assorted/Makefile.in | 589 | ||||
| -rw-r--r-- | assorted/deque2.c | 119 | ||||
| -rw-r--r-- | assorted/pack.c | 103 | ||||
| -rw-r--r-- | assorted/tofrac.c | 71 | ||||
| -rw-r--r-- | assorted/unit2any.c | 49 |
7 files changed, 939 insertions, 0 deletions
diff --git a/assorted/.gitignore b/assorted/.gitignore new file mode 100644 index 0000000..7c16b0a --- /dev/null +++ b/assorted/.gitignore @@ -0,0 +1 @@ +/unit2any diff --git a/assorted/Makefile.am b/assorted/Makefile.am new file mode 100644 index 0000000..fc3c7f1 --- /dev/null +++ b/assorted/Makefile.am @@ -0,0 +1,7 @@ +# -*- Makefile -*- + +AM_CPPFLAGS = -I${top_srcdir}/include + +noinst_PROGRAMS = unit2any + +unit2any_LDADD = ../src/libHX.la diff --git a/assorted/Makefile.in b/assorted/Makefile.in new file mode 100644 index 0000000..f464ec6 --- /dev/null +++ b/assorted/Makefile.in @@ -0,0 +1,589 @@ +# Makefile.in generated by automake 1.13.4 from Makefile.am. +# @configure_input@ + +# Copyright (C) 1994-2013 Free Software Foundation, Inc. + +# This Makefile.in is free software; the Free Software Foundation +# gives unlimited permission to copy and/or distribute it, +# with or without modifications, as long as this notice is preserved. + +# This program is distributed in the hope that it will be useful, +# but WITHOUT ANY WARRANTY, to the extent permitted by law; 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you can + * redistribute it and/or modify it under the terms of the GNU Lesser + * General Public License as published by the Free Software Foundation; + * either version 2.1 or (at your option) any later version. + * + * deque2.c: + * Assorted DEQUE functions that are not deemed to be useful in the + * (compiled) library at this time. + */ +#include <stdio.h> +#include <libHX.h> + +EXPORT_SYMBOL struct HXdeque_node *HXdeque_rfind(struct HXdeque *dq, + const void *ptr) +{ + struct HXdeque_node *trav; + for (trav = dq->last; trav != NULL; trav = trav->prev) + if (trav->ptr == ptr) + return trav; + return NULL; +} + +EXPORT_SYMBOL void *HXdeque_rget(struct HXdeque *dq, const void *ptr) +{ + struct HXdeque_node *trav; + for (trav = dq->last; trav != NULL; trav = trav->prev) + if (trav->ptr == ptr) + return trav->ptr; + return NULL; +} + +EXPORT_SYMBOL void *HXdeque_sget(struct HXdeque *dq, const char *s) +{ + struct HXdeque_node *trav; + for (trav = dq->first; trav != NULL; trav = trav->next) + if (strcmp(trav->ptr, s) == 0) + return trav->ptr; + return NULL; +} + +EXPORT_SYMBOL struct HXdeque_node *HXdeque_dup(struct HXdeque *dq) +{ + /* + * Duplicate the object on top of the stack by popping it off and + * adding it again, twice. + */ + if (dq->last == NULL) + return NULL; + + /* + * The mathematical axiomatic definition is that the last element is + * popped off and pushed twice. We optimize by simply "looking" at the + * last and push it again. + */ + return HXdeque_push(dq, dq->last->ptr); +} + +EXPORT_SYMBOL struct HXdeque_node *HXdeque_rdup(struct HXdeque *dq) +{ + /* Same as HXdeque_dup(), but works on the bottom of the stack */ + if (dq->first == NULL) + return NULL; + return HXdeque_unshift(dq, dq->first->ptr); +} + +EXPORT_SYMBOL struct HXdeque_node *HXdeque_toprr(struct HXdeque *dq) +{ + /* + * Rotates the topmost three items right ([bottom]...CBA[top] => + * [bottom]...ACB[top]). Also works if there are only two items in the + * stack. + */ + struct HXdeque_node *p = dq->last; + if (p == NULL) + return NULL; + HXdeque_down(p); + HXdeque_down(p); + return p; +} + +EXPORT_SYMBOL struct HXdeque_node *HXdeque_toprl(struct HXdeque *dq) +{ + /* Rotates the topmost three items left (...CBA => ...BAC) */ + struct HXdeque_node *p = dq->last; + if (p == NULL) + return NULL; + if (p->Prev != NULL) p = p->Prev; + if (p->Prev != NULL) p = p->Prev; + HXdeque_up(p); + HXdeque_up(p); + return p; +} + +EXPORT_SYMBOL struct HXdeque_node *HXdeque_botrr(struct HXdeque *dq) +{ + /* (CBA... => ...ACB) */ + struct HXdeque_node *p = dq->first; + if (p == NULL) + return NULL; + if (p->Prev != NULL) p = p->Prev; + if (p->Prev != NULL) p = p->Prev; + HXdeque_down(p); + HXdeque_down(p); + return p; +} + +EXPORT_SYMBOL struct HXdeque_node *HXdeque_botrl(struct HXdeque *dq) +{ + struct HXdeque_node *p = dq->first; + if (p == NULL) + return NULL; + HXdeque_up(p); + HXdeque_up(p); + return p; +} diff --git a/assorted/pack.c b/assorted/pack.c new file mode 100644 index 0000000..9eec65e --- /dev/null +++ b/assorted/pack.c @@ -0,0 +1,103 @@ +/* + * libHX/assorted/pack.c + * Copyright Jan Engelhardt, 1999-2005 + * + * This file is part of libHX. libHX is free software; you can + * redistribute it and/or modify it under the terms of the GNU Lesser + * General Public License as published by the Free Software Foundation; + * either version 2.1 or (at your option) any later version. + */ +#include <sys/types.h> +#include <stdarg.h> +#include <stdint.h> +#include <string.h> + +size_t HX_pack(char *buf, size_t buflen, const char *fmt, ...) +{ + char *obp = buf; + int run = 1; + va_list ap; + va_start(ap, fmt); + + while (run && *fmt != '\0') { + switch (*fmt++) { + case 'A': /* string with up to 255 chars */ + case 'a': { + const char *src = va_arg(ap, const char *); + size_t slen = strlen(src) & 0xFF; + if (buflen < slen + 1) { + run = 0; + break; + } + *buf++ = slen; + memcpy(buf, src, slen); + buf += slen; + buflen -= slen + 1; + break; + } + case 'C': /* unsigned char */ + case 'c': + if (buflen-- < 1) { + run = 0; + break; + } + /* + * Minimum object's size being pushed on the stack is 2 + * bytes since short int is promoted to int when passed + * thru va_arg and stays uncasted. (FIXME) + */ + *buf++ = va_arg(ap, unsigned int); + break; + case 'H': /* unsigned short */ + case 'h': + if (buflen < sizeof(uint16_t)) { + run = 0; + break; + } + *((uint16_t *)buf) = va_arg(ap, uint16_t); + buf += sizeof(uint16_t); + buflen -= sizeof(uint16_t); + break; + case 'L': /* unsigned long */ + case 'l': + if (buflen < sizeof(uint32_t)) { + run = 0; + break; + } + *((uint32_t *)buf) = va_arg(ap, uint32_t); + buf += sizeof(uint32_t); + buflen -= sizeof(uint32_t); + break; + case 'S': /* string with up to 65535 chars */ + case 's': { + const char *src = va_arg(ap, const char *); + size_t slen = strlen(src) & 0xFFFF; + if (buflen < slen + 2) { + run = 0; + break; + } + *((unsigned short *)buf) = slen; + memcpy(buf += 2, src, slen); + buf += slen; + buflen -= slen + 2; + break; + } + case 'V': /* fixed size string */ + case 'v': { + void *src = va_arg(ap, void *); + size_t slen = va_arg(ap, size_t); + if (buflen < slen) { + run = 0; + break; + } + memcpy(buf, src, slen); + buf += slen; + buflen -= slen; + break; + } + } /* switch */ + } + + va_end(ap); + return buf - obp; +} diff --git a/assorted/tofrac.c b/assorted/tofrac.c new file mode 100644 index 0000000..e4c1480 --- /dev/null +++ b/assorted/tofrac.c @@ -0,0 +1,71 @@ +/* + * libHX/assorted/tofrac.c + * Copyright Jan Engelhardt, 1999-2010 + * + * This file is part of libHX. libHX is free software; you can + * redistribute it and/or modify it under the terms of the GNU Lesser + * General Public License as published by the Free Software Foundation; + * either version 2.1 or (at your option) any later version. + */ +/* + * Calculates a readable fraction (i.e. 1/3) from arg and puts the + * *numerator into num, the denominator into *denom. Since the fraction + * is found out by an iterative loop, you can specify the minimum value + * of the denominator in *num and the maximum value of the denominator + * into *denom before calling the function. + * + * If a suitable fraction has been found (within the range of the + * minimum / maximum denominator, *num and *denom will be overwritten + * with the results and true is returned; false for no success. + * + * You need to re-put your min/max denom values into *num and *denom + * then. + */ +#include <sys/types.h> +#include <limits.h> +#include <math.h> +#include <stdbool.h> +#include <stdio.h> +#include <stdlib.h> + +/* This simplistic version does not deal with negative numbers. */ + +static bool HX_tofrac(double arg, unsigned long *num, unsigned long *denom) +{ + unsigned long i, min_denom = *num, max_denom = *denom; + double j, s; + + /* + * This tries all possible denominators until @arg multiplied by @i + * gives a number that has a fractional part of 0, which is when we + * found the optimal fraction. + */ + for (i = min_denom; i < max_denom; ++i) { + s = arg * i; + modf(s, &j); + if (s == j) { + *num = j; + *denom = i; + return true; + } + } + return false; +} + +int main(int argc, const char **argv) +{ + unsigned long d = 1, n = ULONG_MAX; + + if (argc < 2) { + fprintf(stderr, "Usage: %s 3.141592\n", *argv); + return EXIT_FAILURE; + } + + if (!HX_tofrac(strtod(argv[1], NULL), &d, &n)) { + fprintf(stderr, "Our algorithm was too weak :-)\n"); + return EXIT_FAILURE; + } + + printf("%lu/%lu\n", d, n); + return EXIT_SUCCESS; +} diff --git a/assorted/unit2any.c b/assorted/unit2any.c new file mode 100644 index 0000000..74e87d3 --- /dev/null +++ b/assorted/unit2any.c @@ -0,0 +1,49 @@ +#include <stdbool.h> +#include <stdlib.h> +#include <libHX/option.h> + +static double dpi = 96; + +static void px2any(const struct HXoptcb *cbi) +{ + double px = cbi->data_dbl; + + printf("%f px are (at %f DPI) equal to:\n", px, dpi); + printf("\t%f inch\n", px / dpi); + printf("\t%f pt\n", px * 72 / dpi); + printf("\t%f cm\n", px * 2.54 / dpi); +} + +static void pt2any(const struct HXoptcb *cbi) +{ + double pt = cbi->data_dbl; + + printf("%f pt are equal to:\n", pt); + printf("\t%f inch\n", pt / 72); + printf("\t%f px (at %f DPI)\n", dpi * pt / 72, dpi); + printf("\t%f cm\n", pt * 2.54 / 72); +} + +static const struct HXoption option_table[] = { + {.sh = 'D', .ln = "dpi", .type = HXTYPE_DOUBLE, .ptr = &dpi, + .help = "Resolution (default: 96 dpi)"}, + {.sh = 'P', .ln = "px", .type = HXTYPE_DOUBLE, .cb = px2any}, + {.sh = 'p', .ln = "pt", .type = HXTYPE_DOUBLE, .cb = pt2any}, + HXOPT_AUTOHELP, + HXOPT_TABLEEND, +}; + +static bool get_options(int *argc, const char ***argv) +{ +} + +int main(int argc, const char **argv) +{ + int ret; + + ret = HX_getopt(option_table, &argc, &argv, HXOPT_USAGEONERR); + if (ret != HXOPT_ERR_SUCCESS) + return EXIT_FAILURE; + + +} |